text: /*===-- clang-c/Index.h - Indexing Public C Interface -------------*- C -*-===*\
  |*                                                                            *|
  |*                     The LLVM Compiler Infrastructure                       *|
  |*                                                                            *|
  |* This file is distributed under the University of Illinois Open Source      *|
  |* License. See LICENSE.TXT for details.                                      *|
  |*                                                                            *|
  |*===----------------------------------------------------------------------===*|
  |*                                                                            *|
  |* This header provides a public inferface to a Clang library for extracting  *|
  |* high-level symbol information from source files without exposing the full  *|
  |* Clang C++ API.                                                             *|
  |*                                                                            *|
  \*===----------------------------------------------------------------------===*/
  
  #ifndef LLVM_CLANG_C_INDEX_H
  #define LLVM_CLANG_C_INDEX_H
  
  #include <time.h>
  
  #include "clang-c/Platform.h"
  #include "clang-c/CXErrorCode.h"
  #include "clang-c/CXString.h"
  #include "clang-c/BuildSystem.h"
  
  /**
   * \brief The version constants for the libclang API.
   * CINDEX_VERSION_MINOR should increase when there are API additions.
   * CINDEX_VERSION_MAJOR is intended for "major" source/ABI breaking changes.
   *
   * The policy about the libclang API was always to keep it source and ABI
   * compatible, thus CINDEX_VERSION_MAJOR is expected to remain stable.
   */
  #define CINDEX_VERSION_MAJOR 0
  #define CINDEX_VERSION_MINOR 31
  
  #define CINDEX_VERSION_ENCODE(major, minor) ( \
        ((major) * 10000)                       \
      + ((minor) *     1))
  
  #define CINDEX_VERSION CINDEX_VERSION_ENCODE( \
      CINDEX_VERSION_MAJOR,                     \
      CINDEX_VERSION_MINOR )
  
  #define CINDEX_VERSION_STRINGIZE_(major, minor)   \
      #major"."#minor
  #define CINDEX_VERSION_STRINGIZE(major, minor)    \
      CINDEX_VERSION_STRINGIZE_(major, minor)
  
  #define CINDEX_VERSION_STRING CINDEX_VERSION_STRINGIZE( \
      CINDEX_VERSION_MAJOR,                               \
      CINDEX_VERSION_MINOR)
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /** \defgroup CINDEX libclang: C Interface to Clang
   *
   * The C Interface to Clang provides a relatively small API that exposes
   * facilities for parsing source code into an abstract syntax tree (AST),
   * loading already-parsed ASTs, traversing the AST, associating
   * physical source locations with elements within the AST, and other
   * facilities that support Clang-based development tools.
   *
   * This C interface to Clang will never provide all of the information
   * representation stored in Clang's C++ AST, nor should it: the intent is to
   * maintain an API that is relatively stable from one release to the next,
   * providing only the basic functionality needed to support development tools.
   *
   * To avoid namespace pollution, data types are prefixed with "CX" and
   * functions are prefixed with "clang_".
   *
   * @{
   */
  
  /**
   * \brief An "index" that consists of a set of translation units that would
   * typically be linked together into an executable or library.
   */
  typedef void *CXIndex;
  
  /**
   * \brief A single translation unit, which resides in an index.
   */
  typedef struct CXTranslationUnitImpl *CXTranslationUnit;
  
  /**
   * \brief Opaque pointer representing client data that will be passed through
   * to various callbacks and visitors.
   */
  typedef void *CXClientData;
  
  /**
   * \brief Provides the contents of a file that has not yet been saved to disk.
   *
   * Each CXUnsavedFile instance provides the name of a file on the
   * system along with the current contents of that file that have not
   * yet been saved to disk.
   */
  struct CXUnsavedFile {
    /**
     * \brief The file whose contents have not yet been saved.
     *
     * This file must already exist in the file system.
     */
    const char *Filename;
  
    /**
     * \brief A buffer containing the unsaved contents of this file.
     */
    const char *Contents;
  
    /**
     * \brief The length of the unsaved contents of this buffer.
     */
    unsigned long Length;
  };
  
  /**
   * \brief Describes the availability of a particular entity, which indicates
   * whether the use of this entity will result in a warning or error due to
   * it being deprecated or unavailable.
   */
  enum CXAvailabilityKind {
    /**
     * \brief The entity is available.
     */
    CXAvailability_Available,
    /**
     * \brief The entity is available, but has been deprecated (and its use is
     * not recommended).
     */
    CXAvailability_Deprecated,
    /**
     * \brief The entity is not available; any use of it will be an error.
     */
    CXAvailability_NotAvailable,
    /**
     * \brief The entity is available, but not accessible; any use of it will be
     * an error.
     */
    CXAvailability_NotAccessible
  };
  
  /**
   * \brief Describes a version number of the form major.minor.subminor.
   */
  typedef struct CXVersion {
    /**
     * \brief The major version number, e.g., the '10' in '10.7.3'. A negative
     * value indicates that there is no version number at all.
     */
    int Major;
    /**
     * \brief The minor version number, e.g., the '7' in '10.7.3'. This value
     * will be negative if no minor version number was provided, e.g., for 
     * version '10'.
     */
    int Minor;
    /**
     * \brief The subminor version number, e.g., the '3' in '10.7.3'. This value
     * will be negative if no minor or subminor version number was provided,
     * e.g., in version '10' or '10.7'.
     */
    int Subminor;
  } CXVersion;
    
  /**
   * \brief Provides a shared context for creating translation units.
   *
   * It provides two options:
   *
   * - excludeDeclarationsFromPCH: When non-zero, allows enumeration of "local"
   * declarations (when loading any new translation units). A "local" declaration
   * is one that belongs in the translation unit itself and not in a precompiled
   * header that was used by the translation unit. If zero, all declarations
   * will be enumerated.
   *
   * Here is an example:
   *
   * \code
   *   // excludeDeclsFromPCH = 1, displayDiagnostics=1
   *   Idx = clang_createIndex(1, 1);
   *
   *   // IndexTest.pch was produced with the following command:
   *   // "clang -x c IndexTest.h -emit-ast -o IndexTest.pch"
   *   TU = clang_createTranslationUnit(Idx, "IndexTest.pch");
   *
   *   // This will load all the symbols from 'IndexTest.pch'
   *   clang_visitChildren(clang_getTranslationUnitCursor(TU),
   *                       TranslationUnitVisitor, 0);
   *   clang_disposeTranslationUnit(TU);
   *
   *   // This will load all the symbols from 'IndexTest.c', excluding symbols
   *   // from 'IndexTest.pch'.
   *   char *args[] = { "-Xclang", "-include-pch=IndexTest.pch" };
   *   TU = clang_createTranslationUnitFromSourceFile(Idx, "IndexTest.c", 2, args,
   *                                                  0, 0);
   *   clang_visitChildren(clang_getTranslationUnitCursor(TU),
   *                       TranslationUnitVisitor, 0);
   *   clang_disposeTranslationUnit(TU);
   * \endcode
   *
   * This process of creating the 'pch', loading it separately, and using it (via
   * -include-pch) allows 'excludeDeclsFromPCH' to remove redundant callbacks
   * (which gives the indexer the same performance benefit as the compiler).
   */
  CINDEX_LINKAGE CXIndex clang_createIndex(int excludeDeclarationsFromPCH,
                                           int displayDiagnostics);
  
  /**
   * \brief Destroy the given index.
   *
   * The index must not be destroyed until all of the translation units created
   * within that index have been destroyed.
   */
  CINDEX_LINKAGE void clang_disposeIndex(CXIndex index);
  
  typedef enum {
    /**
     * \brief Used to indicate that no special CXIndex options are needed.
     */
    CXGlobalOpt_None = 0x0,
  
    /**
     * \brief Used to indicate that threads that libclang creates for indexing
     * purposes should use background priority.
     *
     * Affects #clang_indexSourceFile, #clang_indexTranslationUnit,
     * #clang_parseTranslationUnit, #clang_saveTranslationUnit.
     */
    CXGlobalOpt_ThreadBackgroundPriorityForIndexing = 0x1,
  
    /**
     * \brief Used to indicate that threads that libclang creates for editing
     * purposes should use background priority.
     *
     * Affects #clang_reparseTranslationUnit, #clang_codeCompleteAt,
     * #clang_annotateTokens
     */
    CXGlobalOpt_ThreadBackgroundPriorityForEditing = 0x2,
  
    /**
     * \brief Used to indicate that all threads that libclang creates should use
     * background priority.
     */
    CXGlobalOpt_ThreadBackgroundPriorityForAll =
        CXGlobalOpt_ThreadBackgroundPriorityForIndexing |
        CXGlobalOpt_ThreadBackgroundPriorityForEditing
  
  } CXGlobalOptFlags;
  
  /**
   * \brief Sets general options associated with a CXIndex.
   *
   * For example:
   * \code
   * CXIndex idx = ...;
   * clang_CXIndex_setGlobalOptions(idx,
   *     clang_CXIndex_getGlobalOptions(idx) |
   *     CXGlobalOpt_ThreadBackgroundPriorityForIndexing);
   * \endcode
   *
   * \param options A bitmask of options, a bitwise OR of CXGlobalOpt_XXX flags.
   */
  CINDEX_LINKAGE void clang_CXIndex_setGlobalOptions(CXIndex, unsigned options);
  
  /**
   * \brief Gets the general options associated with a CXIndex.
   *
   * \returns A bitmask of options, a bitwise OR of CXGlobalOpt_XXX flags that
   * are associated with the given CXIndex object.
   */
  CINDEX_LINKAGE unsigned clang_CXIndex_getGlobalOptions(CXIndex);
  
  /**
   * \defgroup CINDEX_FILES File manipulation routines
   *
   * @{
   */
  
  /**
   * \brief A particular source file that is part of a translation unit.
   */
  typedef void *CXFile;
  
  
  /**
   * \brief Retrieve the complete file and path name of the given file.
   */
  CINDEX_LINKAGE CXString clang_getFileName(CXFile SFile);
  
  /**
   * \brief Retrieve the last modification time of the given file.
   */
  CINDEX_LINKAGE time_t clang_getFileTime(CXFile SFile);
  
  /**
   * \brief Uniquely identifies a CXFile, that refers to the same underlying file,
   * across an indexing session.
   */
  typedef struct {
    unsigned long long data[3];
  } CXFileUniqueID;
  
  /**
   * \brief Retrieve the unique ID for the given \c file.
   *
   * \param file the file to get the ID for.
   * \param outID stores the returned CXFileUniqueID.
   * \returns If there was a failure getting the unique ID, returns non-zero,
   * otherwise returns 0.
  */
  CINDEX_LINKAGE int clang_getFileUniqueID(CXFile file, CXFileUniqueID *outID);
  
  /**
   * \brief Determine whether the given header is guarded against
   * multiple inclusions, either with the conventional
   * \#ifndef/\#define/\#endif macro guards or with \#pragma once.
   */
  CINDEX_LINKAGE unsigned 
  clang_isFileMultipleIncludeGuarded(CXTranslationUnit tu, CXFile file);
  
  /**
   * \brief Retrieve a file handle within the given translation unit.
   *
   * \param tu the translation unit
   *
   * \param file_name the name of the file.
   *
   * \returns the file handle for the named file in the translation unit \p tu,
   * or a NULL file handle if the file was not a part of this translation unit.
   */
  CINDEX_LINKAGE CXFile clang_getFile(CXTranslationUnit tu,
                                      const char *file_name);
  
  /**
   * \brief Returns non-zero if the \c file1 and \c file2 point to the same file,
   * or they are both NULL.
   */
  CINDEX_LINKAGE int clang_File_isEqual(CXFile file1, CXFile file2);
  
  /**
   * @}
   */
  
  /**
   * \defgroup CINDEX_LOCATIONS Physical source locations
   *
   * Clang represents physical source locations in its abstract syntax tree in
   * great detail, with file, line, and column information for the majority of
   * the tokens parsed in the source code. These data types and functions are
   * used to represent source location information, either for a particular
   * point in the program or for a range of points in the program, and extract
   * specific location information from those data types.
   *
   * @{
   */
  
  /**
   * \brief Identifies a specific source location within a translation
   * unit.
   *
   * Use clang_getExpansionLocation() or clang_getSpellingLocation()
   * to map a source location to a particular file, line, and column.
   */
  typedef struct {
    const void *ptr_data[2];
    unsigned int_data;
  } CXSourceLocation;
  
  /**
   * \brief Identifies a half-open character range in the source code.
   *
   * Use clang_getRangeStart() and clang_getRangeEnd() to retrieve the
   * starting and end locations from a source range, respectively.
   */
  typedef struct {
    const void *ptr_data[2];
    unsigned begin_int_data;
    unsigned end_int_data;
  } CXSourceRange;
  
  /**
   * \brief Retrieve a NULL (invalid) source location.
   */
  CINDEX_LINKAGE CXSourceLocation clang_getNullLocation(void);
  
  /**
   * \brief Determine whether two source locations, which must refer into
   * the same translation unit, refer to exactly the same point in the source
   * code.
   *
   * \returns non-zero if the source locations refer to the same location, zero
   * if they refer to different locations.
   */
  CINDEX_LINKAGE unsigned clang_equalLocations(CXSourceLocation loc1,
                                               CXSourceLocation loc2);
  
  /**
   * \brief Retrieves the source location associated with a given file/line/column
   * in a particular translation unit.
   */
  CINDEX_LINKAGE CXSourceLocation clang_getLocation(CXTranslationUnit tu,
                                                    CXFile file,
                                                    unsigned line,
                                                    unsigned column);
  /**
   * \brief Retrieves the source location associated with a given character offset
   * in a particular translation unit.
   */
  CINDEX_LINKAGE CXSourceLocation clang_getLocationForOffset(CXTranslationUnit tu,
                                                             CXFile file,
                                                             unsigned offset);
  
  /**
   * \brief Returns non-zero if the given source location is in a system header.
   */
  CINDEX_LINKAGE int clang_Location_isInSystemHeader(CXSourceLocation location);
  
  /**
   * \brief Returns non-zero if the given source location is in the main file of
   * the corresponding translation unit.
   */
  CINDEX_LINKAGE int clang_Location_isFromMainFile(CXSourceLocation location);
  
  /**
   * \brief Retrieve a NULL (invalid) source range.
   */
  CINDEX_LINKAGE CXSourceRange clang_getNullRange(void);
  
  /**
   * \brief Retrieve a source range given the beginning and ending source
   * locations.
   */
  CINDEX_LINKAGE CXSourceRange clang_getRange(CXSourceLocation begin,
                                              CXSourceLocation end);
  
  /**
   * \brief Determine whether two ranges are equivalent.
   *
   * \returns non-zero if the ranges are the same, zero if they differ.
   */
  CINDEX_LINKAGE unsigned clang_equalRanges(CXSourceRange range1,
                                            CXSourceRange range2);
  
  /**
   * \brief Returns non-zero if \p range is null.
   */
  CINDEX_LINKAGE int clang_Range_isNull(CXSourceRange range);
  
  /**
   * \brief Retrieve the file, line, column, and offset represented by
   * the given source location.
   *
   * If the location refers into a macro expansion, retrieves the
   * location of the macro expansion.
   *
   * \param location the location within a source file that will be decomposed
   * into its parts.
   *
   * \param file [out] if non-NULL, will be set to the file to which the given
   * source location points.
   *
   * \param line [out] if non-NULL, will be set to the line to which the given
   * source location points.
   *
   * \param column [out] if non-NULL, will be set to the column to which the given
   * source location points.
   *
   * \param offset [out] if non-NULL, will be set to the offset into the
   * buffer to which the given source location points.
   */
  CINDEX_LINKAGE void clang_getExpansionLocation(CXSourceLocation location,
                                                 CXFile *file,
                                                 unsigned *line,
                                                 unsigned *column,
                                                 unsigned *offset);
  
  /**
   * \brief Retrieve the file, line, column, and offset represented by
   * the given source location, as specified in a # line directive.
   *
   * Example: given the following source code in a file somefile.c
   *
   * \code
   * #123 "dummy.c" 1
   *
   * static int func(void)
   * {
   *     return 0;
   * }
   * \endcode
   *
   * the location information returned by this function would be
   *
   * File: dummy.c Line: 124 Column: 12
   *
   * whereas clang_getExpansionLocation would have returned
   *
   * File: somefile.c Line: 3 Column: 12
   *
   * \param location the location within a source file that will be decomposed
   * into its parts.
   *
   * \param filename [out] if non-NULL, will be set to the filename of the
   * source location. Note that filenames returned will be for "virtual" files,
   * which don't necessarily exist on the machine running clang - e.g. when
   * parsing preprocessed output obtained from a different environment. If
   * a non-NULL value is passed in, remember to dispose of the returned value
   * using \c clang_disposeString() once you've finished with it. For an invalid
   * source location, an empty string is returned.
   *
   * \param line [out] if non-NULL, will be set to the line number of the
   * source location. For an invalid source location, zero is returned.
   *
   * \param column [out] if non-NULL, will be set to the column number of the
   * source location. For an invalid source location, zero is returned.
   */
  CINDEX_LINKAGE void clang_getPresumedLocation(CXSourceLocation location,
                                                CXString *filename,
                                                unsigned *line,
                                                unsigned *column);
  
  /**
   * \brief Legacy API to retrieve the file, line, column, and offset represented
   * by the given source location.
   *
   * This interface has been replaced by the newer interface
   * #clang_getExpansionLocation(). See that interface's documentation for
   * details.
   */
  CINDEX_LINKAGE void clang_getInstantiationLocation(CXSourceLocation location,
                                                     CXFile *file,
                                                     unsigned *line,
                                                     unsigned *column,
                                                     unsigned *offset);
  
  /**
   * \brief Retrieve the file, line, column, and offset represented by
   * the given source location.
   *
   * If the location refers into a macro instantiation, return where the
   * location was originally spelled in the source file.
   *
   * \param location the location within a source file that will be decomposed
   * into its parts.
   *
   * \param file [out] if non-NULL, will be set to the file to which the given
   * source location points.
   *
   * \param line [out] if non-NULL, will be set to the line to which the given
   * source location points.
   *
   * \param column [out] if non-NULL, will be set to the column to which the given
   * source location points.
   *
   * \param offset [out] if non-NULL, will be set to the offset into the
   * buffer to which the given source location points.
   */
  CINDEX_LINKAGE void clang_getSpellingLocation(CXSourceLocation location,
                                                CXFile *file,
                                                unsigned *line,
                                                unsigned *column,
                                                unsigned *offset);
  
  /**
   * \brief Retrieve the file, line, column, and offset represented by
   * the given source location.
   *
   * If the location refers into a macro expansion, return where the macro was
   * expanded or where the macro argument was written, if the location points at
   * a macro argument.
   *
   * \param location the location within a source file that will be decomposed
   * into its parts.
   *
   * \param file [out] if non-NULL, will be set to the file to which the given
   * source location points.
   *
   * \param line [out] if non-NULL, will be set to the line to which the given
   * source location points.
   *
   * \param column [out] if non-NULL, will be set to the column to which the given
   * source location points.
   *
   * \param offset [out] if non-NULL, will be set to the offset into the
   * buffer to which the given source location points.
   */
  CINDEX_LINKAGE void clang_getFileLocation(CXSourceLocation location,
                                            CXFile *file,
                                            unsigned *line,
                                            unsigned *column,
                                            unsigned *offset);
  
  /**
   * \brief Retrieve a source location representing the first character within a
   * source range.
   */
  CINDEX_LINKAGE CXSourceLocation clang_getRangeStart(CXSourceRange range);
  
  /**
   * \brief Retrieve a source location representing the last character within a
   * source range.
   */
  CINDEX_LINKAGE CXSourceLocation clang_getRangeEnd(CXSourceRange range);
  
  /**
   * \brief Identifies an array of ranges.
   */
  typedef struct {
    /** \brief The number of ranges in the \c ranges array. */
    unsigned count;
    /**
     * \brief An array of \c CXSourceRanges.
     */
    CXSourceRange *ranges;
  } CXSourceRangeList;
  
  /**
   * \brief Retrieve all ranges that were skipped by the preprocessor.
   *
   * The preprocessor will skip lines when they are surrounded by an
   * if/ifdef/ifndef directive whose condition does not evaluate to true.
   */
  CINDEX_LINKAGE CXSourceRangeList *clang_getSkippedRanges(CXTranslationUnit tu,
                                                           CXFile file);
  
  /**
   * \brief Destroy the given \c CXSourceRangeList.
   */
  CINDEX_LINKAGE void clang_disposeSourceRangeList(CXSourceRangeList *ranges);
  
  /**
   * @}
   */
  
  /**
   * \defgroup CINDEX_DIAG Diagnostic reporting
   *
   * @{
   */
  
  /**
   * \brief Describes the severity of a particular diagnostic.
   */
  enum CXDiagnosticSeverity {
    /**
     * \brief A diagnostic that has been suppressed, e.g., by a command-line
     * option.
     */
    CXDiagnostic_Ignored = 0,
  
    /**
     * \brief This diagnostic is a note that should be attached to the
     * previous (non-note) diagnostic.
     */
    CXDiagnostic_Note    = 1,
  
    /**
     * \brief This diagnostic indicates suspicious code that may not be
     * wrong.
     */
    CXDiagnostic_Warning = 2,
  
    /**
     * \brief This diagnostic indicates that the code is ill-formed.
     */
    CXDiagnostic_Error   = 3,
  
    /**
     * \brief This diagnostic indicates that the code is ill-formed such
     * that future parser recovery is unlikely to produce useful
     * results.
     */
    CXDiagnostic_Fatal   = 4
  };
  
  /**
   * \brief A single diagnostic, containing the diagnostic's severity,
   * location, text, source ranges, and fix-it hints.
   */
  typedef void *CXDiagnostic;
  
  /**
   * \brief A group of CXDiagnostics.
   */
  typedef void *CXDiagnosticSet;
    
  /**
   * \brief Determine the number of diagnostics in a CXDiagnosticSet.
   */
  CINDEX_LINKAGE unsigned clang_getNumDiagnosticsInSet(CXDiagnosticSet Diags);
  
  /**
   * \brief Retrieve a diagnostic associated with the given CXDiagnosticSet.
   *
   * \param Diags the CXDiagnosticSet to query.
   * \param Index the zero-based diagnostic number to retrieve.
   *
   * \returns the requested diagnostic. This diagnostic must be freed
   * via a call to \c clang_disposeDiagnostic().
   */
  CINDEX_LINKAGE CXDiagnostic clang_getDiagnosticInSet(CXDiagnosticSet Diags,
                                                       unsigned Index);  
  
  
  /**
   * \brief Describes the kind of error that occurred (if any) in a call to
   * \c clang_loadDiagnostics.
   */
  enum CXLoadDiag_Error {
    /**
     * \brief Indicates that no error occurred.
     */
    CXLoadDiag_None = 0,
    
    /**
     * \brief Indicates that an unknown error occurred while attempting to
     * deserialize diagnostics.
     */
    CXLoadDiag_Unknown = 1,
    
    /**
     * \brief Indicates that the file containing the serialized diagnostics
     * could not be opened.
     */
    CXLoadDiag_CannotLoad = 2,
    
    /**
     * \brief Indicates that the serialized diagnostics file is invalid or
     * corrupt.
     */
    CXLoadDiag_InvalidFile = 3
  };
    
  /**
   * \brief Deserialize a set of diagnostics from a Clang diagnostics bitcode
   * file.
   *
   * \param file The name of the file to deserialize.
   * \param error A pointer to a enum value recording if there was a problem
   *        deserializing the diagnostics.
   * \param errorString A pointer to a CXString for recording the error string
   *        if the file was not successfully loaded.
   *
   * \returns A loaded CXDiagnosticSet if successful, and NULL otherwise.  These
   * diagnostics should be released using clang_disposeDiagnosticSet().
   */
  CINDEX_LINKAGE CXDiagnosticSet clang_loadDiagnostics(const char *file,
                                                    enum CXLoadDiag_Error *error,
                                                    CXString *errorString);
  
  /**
   * \brief Release a CXDiagnosticSet and all of its contained diagnostics.
   */
  CINDEX_LINKAGE void clang_disposeDiagnosticSet(CXDiagnosticSet Diags);
  
  /**
   * \brief Retrieve the child diagnostics of a CXDiagnostic. 
   *
   * This CXDiagnosticSet does not need to be released by
   * clang_disposeDiagnosticSet.
   */
  CINDEX_LINKAGE CXDiagnosticSet clang_getChildDiagnostics(CXDiagnostic D);
  
  /**
   * \brief Determine the number of diagnostics produced for the given
   * translation unit.
   */
  CINDEX_LINKAGE unsigned clang_getNumDiagnostics(CXTranslationUnit Unit);
  
  /**
   * \brief Retrieve a diagnostic associated with the given translation unit.
   *
   * \param Unit the translation unit to query.
   * \param Index the zero-based diagnostic number to retrieve.
   *
   * \returns the requested diagnostic. This diagnostic must be freed
   * via a call to \c clang_disposeDiagnostic().
   */
  CINDEX_LINKAGE CXDiagnostic clang_getDiagnostic(CXTranslationUnit Unit,
                                                  unsigned Index);
  
  /**
   * \brief Retrieve the complete set of diagnostics associated with a
   *        translation unit.
   *
   * \param Unit the translation unit to query.
   */
  CINDEX_LINKAGE CXDiagnosticSet
    clang_getDiagnosticSetFromTU(CXTranslationUnit Unit);  
  
  /**
   * \brief Destroy a diagnostic.
   */
  CINDEX_LINKAGE void clang_disposeDiagnostic(CXDiagnostic Diagnostic);
  
  /**
   * \brief Options to control the display of diagnostics.
   *
   * The values in this enum are meant to be combined to customize the
   * behavior of \c clang_formatDiagnostic().
   */
  enum CXDiagnosticDisplayOptions {
    /**
     * \brief Display the source-location information where the
     * diagnostic was located.
     *
     * When set, diagnostics will be prefixed by the file, line, and
     * (optionally) column to which the diagnostic refers. For example,
     *
     * \code
     * test.c:28: warning: extra tokens at end of #endif directive
     * \endcode
     *
     * This option corresponds to the clang flag \c -fshow-source-location.
     */
    CXDiagnostic_DisplaySourceLocation = 0x01,
  
    /**
     * \brief If displaying the source-location information of the
     * diagnostic, also include the column number.
     *
     * This option corresponds to the clang flag \c -fshow-column.
     */
    CXDiagnostic_DisplayColumn = 0x02,
  
    /**
     * \brief If displaying the source-location information of the
     * diagnostic, also include information about source ranges in a
     * machine-parsable format.
     *
     * This option corresponds to the clang flag
     * \c -fdiagnostics-print-source-range-info.
     */
    CXDiagnostic_DisplaySourceRanges = 0x04,
    
    /**
     * \brief Display the option name associated with this diagnostic, if any.
     *
     * The option name displayed (e.g., -Wconversion) will be placed in brackets
     * after the diagnostic text. This option corresponds to the clang flag
     * \c -fdiagnostics-show-option.
     */
    CXDiagnostic_DisplayOption = 0x08,
    
    /**
     * \brief Display the category number associated with this diagnostic, if any.
     *
     * The category number is displayed within brackets after the diagnostic text.
     * This option corresponds to the clang flag 
     * \c -fdiagnostics-show-category=id.
     */
    CXDiagnostic_DisplayCategoryId = 0x10,
  
    /**
     * \brief Display the category name associated with this diagnostic, if any.
     *
     * The category name is displayed within brackets after the diagnostic text.
     * This option corresponds to the clang flag 
     * \c -fdiagnostics-show-category=name.
     */
    CXDiagnostic_DisplayCategoryName = 0x20
  };
  
  /**
   * \brief Format the given diagnostic in a manner that is suitable for display.
   *
   * This routine will format the given diagnostic to a string, rendering
   * the diagnostic according to the various options given. The
   * \c clang_defaultDiagnosticDisplayOptions() function returns the set of
   * options that most closely mimics the behavior of the clang compiler.
   *
   * \param Diagnostic The diagnostic to print.
   *
   * \param Options A set of options that control the diagnostic display,
   * created by combining \c CXDiagnosticDisplayOptions values.
   *
   * \returns A new string containing for formatted diagnostic.
   */
  CINDEX_LINKAGE CXString clang_formatDiagnostic(CXDiagnostic Diagnostic,
                                                 unsigned Options);
  
  /**
   * \brief Retrieve the set of display options most similar to the
   * default behavior of the clang compiler.
   *
   * \returns A set of display options suitable for use with \c
   * clang_formatDiagnostic().
   */
  CINDEX_LINKAGE unsigned clang_defaultDiagnosticDisplayOptions(void);
  
  /**
   * \brief Determine the severity of the given diagnostic.
   */
  CINDEX_LINKAGE enum CXDiagnosticSeverity
  clang_getDiagnosticSeverity(CXDiagnostic);
  
  /**
   * \brief Retrieve the source location of the given diagnostic.
   *
   * This location is where Clang would print the caret ('^') when
   * displaying the diagnostic on the command line.
   */
  CINDEX_LINKAGE CXSourceLocation clang_getDiagnosticLocation(CXDiagnostic);
  
  /**
   * \brief Retrieve the text of the given diagnostic.
   */
  CINDEX_LINKAGE CXString clang_getDiagnosticSpelling(CXDiagnostic);
  
  /**
   * \brief Retrieve the name of the command-line option that enabled this
   * diagnostic.
   *
   * \param Diag The diagnostic to be queried.
   *
   * \param Disable If non-NULL, will be set to the option that disables this
   * diagnostic (if any).
   *
   * \returns A string that contains the command-line option used to enable this
   * warning, such as "-Wconversion" or "-pedantic". 
   */
  CINDEX_LINKAGE CXString clang_getDiagnosticOption(CXDiagnostic Diag,
                                                    CXString *Disable);
  
  /**
   * \brief Retrieve the category number for this diagnostic.
   *
   * Diagnostics can be categorized into groups along with other, related
   * diagnostics (e.g., diagnostics under the same warning flag). This routine 
   * retrieves the category number for the given diagnostic.
   *
   * \returns The number of the category that contains this diagnostic, or zero
   * if this diagnostic is uncategorized.
   */
  CINDEX_LINKAGE unsigned clang_getDiagnosticCategory(CXDiagnostic);
  
  /**
   * \brief Retrieve the name of a particular diagnostic category.  This
   *  is now deprecated.  Use clang_getDiagnosticCategoryText()
   *  instead.
   *
   * \param Category A diagnostic category number, as returned by 
   * \c clang_getDiagnosticCategory().
   *
   * \returns The name of the given diagnostic category.
   */
  CINDEX_DEPRECATED CINDEX_LINKAGE
  CXString clang_getDiagnosticCategoryName(unsigned Category);
  
  /**
   * \brief Retrieve the diagnostic category text for a given diagnostic.
   *
   * \returns The text of the given diagnostic category.
   */
  CINDEX_LINKAGE CXString clang_getDiagnosticCategoryText(CXDiagnostic);
    
  /**
   * \brief Determine the number of source ranges associated with the given
   * diagnostic.
   */
  CINDEX_LINKAGE unsigned clang_getDiagnosticNumRanges(CXDiagnostic);
  
  /**
   * \brief Retrieve a source range associated with the diagnostic.
   *
   * A diagnostic's source ranges highlight important elements in the source
   * code. On the command line, Clang displays source ranges by
   * underlining them with '~' characters.
   *
   * \param Diagnostic the diagnostic whose range is being extracted.
   *
   * \param Range the zero-based index specifying which range to
   *
   * \returns the requested source range.
   */
  CINDEX_LINKAGE CXSourceRange clang_getDiagnosticRange(CXDiagnostic Diagnostic,
                                                        unsigned Range);
  
  /**
   * \brief Determine the number of fix-it hints associated with the
   * given diagnostic.
   */
  CINDEX_LINKAGE unsigned clang_getDiagnosticNumFixIts(CXDiagnostic Diagnostic);
  
  /**
   * \brief Retrieve the replacement information for a given fix-it.
   *
   * Fix-its are described in terms of a source range whose contents
   * should be replaced by a string. This approach generalizes over
   * three kinds of operations: removal of source code (the range covers
   * the code to be removed and the replacement string is empty),
   * replacement of source code (the range covers the code to be
   * replaced and the replacement string provides the new code), and
   * insertion (both the start and end of the range point at the
   * insertion location, and the replacement string provides the text to
   * insert).
   *
   * \param Diagnostic The diagnostic whose fix-its are being queried.
   *
   * \param FixIt The zero-based index of the fix-it.
   *
   * \param ReplacementRange The source range whose contents will be
   * replaced with the returned replacement string. Note that source
   * ranges are half-open ranges [a, b), so the source code should be
   * replaced from a and up to (but not including) b.
   *
   * \returns A string containing text that should be replace the source
   * code indicated by the \c ReplacementRange.
   */
  CINDEX_LINKAGE CXString clang_getDiagnosticFixIt(CXDiagnostic Diagnostic,
                                                   unsigned FixIt,
                                                 CXSourceRange *ReplacementRange);
  
  /**
   * @}
   */
  
  /**
   * \defgroup CINDEX_TRANSLATION_UNIT Translation unit manipulation
   *
   * The routines in this group provide the ability to create and destroy
   * translation units from files, either by parsing the contents of the files or
   * by reading in a serialized representation of a translation unit.
   *
   * @{
   */
  
  /**
   * \brief Get the original translation unit source file name.
   */
  CINDEX_LINKAGE CXString
  clang_getTranslationUnitSpelling(CXTranslationUnit CTUnit);
  
  /**
   * \brief Return the CXTranslationUnit for a given source file and the provided
   * command line arguments one would pass to the compiler.
   *
   * Note: The 'source_filename' argument is optional.  If the caller provides a
   * NULL pointer, the name of the source file is expected to reside in the
   * specified command line arguments.
   *
   * Note: When encountered in 'clang_command_line_args', the following options
   * are ignored:
   *
   *   '-c'
   *   '-emit-ast'
   *   '-fsyntax-only'
   *   '-o \<output file>'  (both '-o' and '\<output file>' are ignored)
   *
   * \param CIdx The index object with which the translation unit will be
   * associated.
   *
   * \param source_filename The name of the source file to load, or NULL if the
   * source file is included in \p clang_command_line_args.
   *
   * \param num_clang_command_line_args The number of command-line arguments in
   * \p clang_command_line_args.
   *
   * \param clang_command_line_args The command-line arguments that would be
   * passed to the \c clang executable if it were being invoked out-of-process.
   * These command-line options will be parsed and will affect how the translation
   * unit is parsed. Note that the following options are ignored: '-c',
   * '-emit-ast', '-fsyntax-only' (which is the default), and '-o \<output file>'.
   *
   * \param num_unsaved_files the number of unsaved file entries in \p
   * unsaved_files.
   *
   * \param unsaved_files the files that have not yet been saved to disk
   * but may be required for code completion, including the contents of
   * those files.  The contents and name of these files (as specified by
   * CXUnsavedFile) are copied when necessary, so the client only needs to
   * guarantee their validity until the call to this function returns.
   */
  CINDEX_LINKAGE CXTranslationUnit clang_createTranslationUnitFromSourceFile(
                                           CXIndex CIdx,
                                           const char *source_filename,
                                           int num_clang_command_line_args,
                                     const char * const *clang_command_line_args,
                                           unsigned num_unsaved_files,
                                           struct CXUnsavedFile *unsaved_files);
  
  /**
   * \brief Same as \c clang_createTranslationUnit2, but returns
   * the \c CXTranslationUnit instead of an error code.  In case of an error this
   * routine returns a \c NULL \c CXTranslationUnit, without further detailed
   * error codes.
   */
  CINDEX_LINKAGE CXTranslationUnit clang_createTranslationUnit(
      CXIndex CIdx,
      const char *ast_filename);
  
  /**
   * \brief Create a translation unit from an AST file (\c -emit-ast).
   *
   * \param[out] out_TU A non-NULL pointer to store the created
   * \c CXTranslationUnit.
   *
   * \returns Zero on success, otherwise returns an error code.
   */
  CINDEX_LINKAGE enum CXErrorCode clang_createTranslationUnit2(
      CXIndex CIdx,
      const char *ast_filename,
      CXTranslationUnit *out_TU);
  
  /**
   * \brief Flags that control the creation of translation units.
   *
   * The enumerators in this enumeration type are meant to be bitwise
   * ORed together to specify which options should be used when
   * constructing the translation unit.
   */
  enum CXTranslationUnit_Flags {
    /**
     * \brief Used to indicate that no special translation-unit options are
     * needed.
     */
    CXTranslationUnit_None = 0x0,
  
    /**
     * \brief Used to indicate that the parser should construct a "detailed"
     * preprocessing record, including all macro definitions and instantiations.
     *
     * Constructing a detailed preprocessing record requires more memory
     * and time to parse, since the information contained in the record
     * is usually not retained. However, it can be useful for
     * applications that require more detailed information about the
     * behavior of the preprocessor.
     */
    CXTranslationUnit_DetailedPreprocessingRecord = 0x01,
  
    /**
     * \brief Used to indicate that the translation unit is incomplete.
     *
     * When a translation unit is considered "incomplete", semantic
     * analysis that is typically performed at the end of the
     * translation unit will be suppressed. For example, this suppresses
     * the completion of tentative declarations in C and of
     * instantiation of implicitly-instantiation function templates in
     * C++. This option is typically used when parsing a header with the
     * intent of producing a precompiled header.
     */
    CXTranslationUnit_Incomplete = 0x02,
    
    /**
     * \brief Used to indicate that the translation unit should be built with an 
     * implicit precompiled header for the preamble.
     *
     * An implicit precompiled header is used as an optimization when a
     * particular translation unit is likely to be reparsed many times
     * when the sources aren't changing that often. In this case, an
     * implicit precompiled header will be built containing all of the
     * initial includes at the top of the main file (what we refer to as
     * the "preamble" of the file). In subsequent parses, if the
     * preamble or the files in it have not changed, \c
     * clang_reparseTranslationUnit() will re-use the implicit
     * precompiled header to improve parsing performance.
     */
    CXTranslationUnit_PrecompiledPreamble = 0x04,
    
    /**
     * \brief Used to indicate that the translation unit should cache some
     * code-completion results with each reparse of the source file.
     *
     * Caching of code-completion results is a performance optimization that
     * introduces some overhead to reparsing but improves the performance of
     * code-completion operations.
     */
    CXTranslationUnit_CacheCompletionResults = 0x08,
  
    /**
     * \brief Used to indicate that the translation unit will be serialized with
     * \c clang_saveTranslationUnit.
     *
     * This option is typically used when parsing a header with the intent of
     * producing a precompiled header.
     */
    CXTranslationUnit_ForSerialization = 0x10,
  
    /**
     * \brief DEPRECATED: Enabled chained precompiled preambles in C++.
     *
     * Note: this is a *temporary* option that is available only while
     * we are testing C++ precompiled preamble support. It is deprecated.
     */
    CXTranslationUnit_CXXChainedPCH = 0x20,
  
    /**
     * \brief Used to indicate that function/method bodies should be skipped while
     * parsing.
     *
     * This option can be used to search for declarations/definitions while
     * ignoring the usages.
     */
    CXTranslationUnit_SkipFunctionBodies = 0x40,
  
    /**
     * \brief Used to indicate that brief documentation comments should be
     * included into the set of code completions returned from this translation
     * unit.
     */
    CXTranslationUnit_IncludeBriefCommentsInCodeCompletion = 0x80
  };
  
  /**
   * \brief Returns the set of flags that is suitable for parsing a translation
   * unit that is being edited.
   *
   * The set of flags returned provide options for \c clang_parseTranslationUnit()
   * to indicate that the translation unit is likely to be reparsed many times,
   * either explicitly (via \c clang_reparseTranslationUnit()) or implicitly
   * (e.g., by code completion (\c clang_codeCompletionAt())). The returned flag
   * set contains an unspecified set of optimizations (e.g., the precompiled 
   * preamble) geared toward improving the performance of these routines. The
   * set of optimizations enabled may change from one version to the next.
   */
  CINDEX_LINKAGE unsigned clang_defaultEditingTranslationUnitOptions(void);
  
  /**
   * \brief Same as \c clang_parseTranslationUnit2, but returns
   * the \c CXTranslationUnit instead of an error code.  In case of an error this
   * routine returns a \c NULL \c CXTranslationUnit, without further detailed
   * error codes.
   */
  CINDEX_LINKAGE CXTranslationUnit
  clang_parseTranslationUnit(CXIndex CIdx,
                             const char *source_filename,
                             const char *const *command_line_args,
                             int num_command_line_args,
                             struct CXUnsavedFile *unsaved_files,
                             unsigned num_unsaved_files,
                             unsigned options);
  
  /**
   * \brief Parse the given source file and the translation unit corresponding
   * to that file.
   *
   * This routine is the main entry point for the Clang C API, providing the
   * ability to parse a source file into a translation unit that can then be
   * queried by other functions in the API. This routine accepts a set of
   * command-line arguments so that the compilation can be configured in the same
   * way that the compiler is configured on the command line.
   *
   * \param CIdx The index object with which the translation unit will be 
   * associated.
   *
   * \param source_filename The name of the source file to load, or NULL if the
   * source file is included in \c command_line_args.
   *
   * \param command_line_args The command-line arguments that would be
   * passed to the \c clang executable if it were being invoked out-of-process.
   * These command-line options will be parsed and will affect how the translation
   * unit is parsed. Note that the following options are ignored: '-c', 
   * '-emit-ast', '-fsyntax-only' (which is the default), and '-o \<output file>'.
   *
   * \param num_command_line_args The number of command-line arguments in
   * \c command_line_args.
   *
   * \param unsaved_files the files that have not yet been saved to disk
   * but may be required for parsing, including the contents of
   * those files.  The contents and name of these files (as specified by
   * CXUnsavedFile) are copied when necessary, so the client only needs to
   * guarantee their validity until the call to this function returns.
   *
   * \param num_unsaved_files the number of unsaved file entries in \p
   * unsaved_files.
   *
   * \param options A bitmask of options that affects how the translation unit
   * is managed but not its compilation. This should be a bitwise OR of the
   * CXTranslationUnit_XXX flags.
   *
   * \param[out] out_TU A non-NULL pointer to store the created
   * \c CXTranslationUnit, describing the parsed code and containing any
   * diagnostics produced by the compiler.
   *
   * \returns Zero on success, otherwise returns an error code.
   */
  CINDEX_LINKAGE enum CXErrorCode
  clang_parseTranslationUnit2(CXIndex CIdx,
                              const char *source_filename,
                              const char *const *command_line_args,
                              int num_command_line_args,
                              struct CXUnsavedFile *unsaved_files,
                              unsigned num_unsaved_files,
                              unsigned options,
                              CXTranslationUnit *out_TU);
  
  /**
   * \brief Same as clang_parseTranslationUnit2 but requires a full command line
   * for \c command_line_args including argv[0]. This is useful if the standard
   * library paths are relative to the binary.
   */
  CINDEX_LINKAGE enum CXErrorCode clang_parseTranslationUnit2FullArgv(
      CXIndex CIdx, const char *source_filename,
      const char *const *command_line_args, int num_command_line_args,
      struct CXUnsavedFile *unsaved_files, unsigned num_unsaved_files,
      unsigned options, CXTranslationUnit *out_TU);
  
  /**
   * \brief Flags that control how translation units are saved.
   *
   * The enumerators in this enumeration type are meant to be bitwise
   * ORed together to specify which options should be used when
   * saving the translation unit.
   */
  enum CXSaveTranslationUnit_Flags {
    /**
     * \brief Used to indicate that no special saving options are needed.
     */
    CXSaveTranslationUnit_None = 0x0
  };
  
  /**
   * \brief Returns the set of flags that is suitable for saving a translation
   * unit.
   *
   * The set of flags returned provide options for
   * \c clang_saveTranslationUnit() by default. The returned flag
   * set contains an unspecified set of options that save translation units with
   * the most commonly-requested data.
   */
  CINDEX_LINKAGE unsigned clang_defaultSaveOptions(CXTranslationUnit TU);
  
  /**
   * \brief Describes the kind of error that occurred (if any) in a call to
   * \c clang_saveTranslationUnit().
   */
  enum CXSaveError {
    /**
     * \brief Indicates that no error occurred while saving a translation unit.
     */
    CXSaveError_None = 0,
    
    /**
     * \brief Indicates that an unknown error occurred while attempting to save
     * the file.
     *
     * This error typically indicates that file I/O failed when attempting to 
     * write the file.
     */
    CXSaveError_Unknown = 1,
    
    /**
     * \brief Indicates that errors during translation prevented this attempt
     * to save the translation unit.
     * 
     * Errors that prevent the translation unit from being saved can be
     * extracted using \c clang_getNumDiagnostics() and \c clang_getDiagnostic().
     */
    CXSaveError_TranslationErrors = 2,
    
    /**
     * \brief Indicates that the translation unit to be saved was somehow
     * invalid (e.g., NULL).
     */
    CXSaveError_InvalidTU = 3
  };
    
  /**
   * \brief Saves a translation unit into a serialized representation of
   * that translation unit on disk.
   *
   * Any translation unit that was parsed without error can be saved
   * into a file. The translation unit can then be deserialized into a
   * new \c CXTranslationUnit with \c clang_createTranslationUnit() or,
   * if it is an incomplete translation unit that corresponds to a
   * header, used as a precompiled header when parsing other translation
   * units.
   *
   * \param TU The translation unit to save.
   *
   * \param FileName The file to which the translation unit will be saved.
   *
   * \param options A bitmask of options that affects how the translation unit
   * is saved. This should be a bitwise OR of the
   * CXSaveTranslationUnit_XXX flags.
   *
   * \returns A value that will match one of the enumerators of the CXSaveError
   * enumeration. Zero (CXSaveError_None) indicates that the translation unit was 
   * saved successfully, while a non-zero value indicates that a problem occurred.
   */
  CINDEX_LINKAGE int clang_saveTranslationUnit(CXTranslationUnit TU,
                                               const char *FileName,
                                               unsigned options);
  
  /**
   * \brief Destroy the specified CXTranslationUnit object.
   */
  CINDEX_LINKAGE void clang_disposeTranslationUnit(CXTranslationUnit);
  
  /**
   * \brief Flags that control the reparsing of translation units.
   *
   * The enumerators in this enumeration type are meant to be bitwise
   * ORed together to specify which options should be used when
   * reparsing the translation unit.
   */
  enum CXReparse_Flags {
    /**
     * \brief Used to indicate that no special reparsing options are needed.
     */
    CXReparse_None = 0x0
  };
   
  /**
   * \brief Returns the set of flags that is suitable for reparsing a translation
   * unit.
   *
   * The set of flags returned provide options for
   * \c clang_reparseTranslationUnit() by default. The returned flag
   * set contains an unspecified set of optimizations geared toward common uses
   * of reparsing. The set of optimizations enabled may change from one version 
   * to the next.
   */
  CINDEX_LINKAGE unsigned clang_defaultReparseOptions(CXTranslationUnit TU);
  
  /**
   * \brief Reparse the source files that produced this translation unit.
   *
   * This routine can be used to re-parse the source files that originally
   * created the given translation unit, for example because those source files
   * have changed (either on disk or as passed via \p unsaved_files). The
   * source code will be reparsed with the same command-line options as it
   * was originally parsed. 
   *
   * Reparsing a translation unit invalidates all cursors and source locations
   * that refer into that translation unit. This makes reparsing a translation
   * unit semantically equivalent to destroying the translation unit and then
   * creating a new translation unit with the same command-line arguments.
   * However, it may be more efficient to reparse a translation 
   * unit using this routine.
   *
   * \param TU The translation unit whose contents will be re-parsed. The
   * translation unit must originally have been built with 
   * \c clang_createTranslationUnitFromSourceFile().
   *
   * \param num_unsaved_files The number of unsaved file entries in \p
   * unsaved_files.
   *
   * \param unsaved_files The files that have not yet been saved to disk
   * but may be required for parsing, including the contents of
   * those files.  The contents and name of these files (as specified by
   * CXUnsavedFile) are copied when necessary, so the client only needs to
   * guarantee their validity until the call to this function returns.
   * 
   * \param options A bitset of options composed of the flags in CXReparse_Flags.
   * The function \c clang_defaultReparseOptions() produces a default set of
   * options recommended for most uses, based on the translation unit.
   *
   * \returns 0 if the sources could be reparsed.  A non-zero error code will be
   * returned if reparsing was impossible, such that the translation unit is
   * invalid. In such cases, the only valid call for \c TU is
   * \c clang_disposeTranslationUnit(TU).  The error codes returned by this
   * routine are described by the \c CXErrorCode enum.
   */
  CINDEX_LINKAGE int clang_reparseTranslationUnit(CXTranslationUnit TU,
                                                  unsigned num_unsaved_files,
                                            struct CXUnsavedFile *unsaved_files,
                                                  unsigned options);
  
  /**
    * \brief Categorizes how memory is being used by a translation unit.
    */
  enum CXTUResourceUsageKind {
    CXTUResourceUsage_AST = 1,
    CXTUResourceUsage_Identifiers = 2,
    CXTUResourceUsage_Selectors = 3,
    CXTUResourceUsage_GlobalCompletionResults = 4,
    CXTUResourceUsage_SourceManagerContentCache = 5,
    CXTUResourceUsage_AST_SideTables = 6,
    CXTUResourceUsage_SourceManager_Membuffer_Malloc = 7,
    CXTUResourceUsage_SourceManager_Membuffer_MMap = 8,
    CXTUResourceUsage_ExternalASTSource_Membuffer_Malloc = 9, 
    CXTUResourceUsage_ExternalASTSource_Membuffer_MMap = 10, 
    CXTUResourceUsage_Preprocessor = 11,
    CXTUResourceUsage_PreprocessingRecord = 12,
    CXTUResourceUsage_SourceManager_DataStructures = 13,
    CXTUResourceUsage_Preprocessor_HeaderSearch = 14,
    CXTUResourceUsage_MEMORY_IN_BYTES_BEGIN = CXTUResourceUsage_AST,
    CXTUResourceUsage_MEMORY_IN_BYTES_END =
      CXTUResourceUsage_Preprocessor_HeaderSearch,
  
    CXTUResourceUsage_First = CXTUResourceUsage_AST,
    CXTUResourceUsage_Last = CXTUResourceUsage_Preprocessor_HeaderSearch
  };
  
  /**
    * \brief Returns the human-readable null-terminated C string that represents
    *  the name of the memory category.  This string should never be freed.
    */
  CINDEX_LINKAGE
  const char *clang_getTUResourceUsageName(enum CXTUResourceUsageKind kind);
  
  typedef struct CXTUResourceUsageEntry {
    /* \brief The memory usage category. */
    enum CXTUResourceUsageKind kind;  
    /* \brief Amount of resources used. 
        The units will depend on the resource kind. */
    unsigned long amount;
  } CXTUResourceUsageEntry;
  
  /**
    * \brief The memory usage of a CXTranslationUnit, broken into categories.
    */
  typedef struct CXTUResourceUsage {
    /* \brief Private data member, used for queries. */
    void *data;
  
    /* \brief The number of entries in the 'entries' array. */
    unsigned numEntries;
  
    /* \brief An array of key-value pairs, representing the breakdown of memory
              usage. */
    CXTUResourceUsageEntry *entries;
  
  } CXTUResourceUsage;
  
  /**
    * \brief Return the memory usage of a translation unit.  This object
    *  should be released with clang_disposeCXTUResourceUsage().
    */
  CINDEX_LINKAGE CXTUResourceUsage clang_getCXTUResourceUsage(CXTranslationUnit TU);
  
  CINDEX_LINKAGE void clang_disposeCXTUResourceUsage(CXTUResourceUsage usage);
  
  /**
   * @}
   */
  
  /**
   * \brief Describes the kind of entity that a cursor refers to.
   */
  enum CXCursorKind {
    /* Declarations */
    /**
     * \brief A declaration whose specific kind is not exposed via this
     * interface.
     *
     * Unexposed declarations have the same operations as any other kind
     * of declaration; one can extract their location information,
     * spelling, find their definitions, etc. However, the specific kind
     * of the declaration is not reported.
     */
    CXCursor_UnexposedDecl                 = 1,
    /** \brief A C or C++ struct. */
    CXCursor_StructDecl                    = 2,
    /** \brief A C or C++ union. */
    CXCursor_UnionDecl                     = 3,
    /** \brief A C++ class. */
    CXCursor_ClassDecl                     = 4,
    /** \brief An enumeration. */
    CXCursor_EnumDecl                      = 5,
    /**
     * \brief A field (in C) or non-static data member (in C++) in a
     * struct, union, or C++ class.
     */
    CXCursor_FieldDecl                     = 6,
    /** \brief An enumerator constant. */
    CXCursor_EnumConstantDecl              = 7,
    /** \brief A function. */
    CXCursor_FunctionDecl                  = 8,
    /** \brief A variable. */
    CXCursor_VarDecl                       = 9,
    /** \brief A function or method parameter. */
    CXCursor_ParmDecl                      = 10,
    /** \brief An Objective-C \@interface. */
    CXCursor_ObjCInterfaceDecl             = 11,
    /** \brief An Objective-C \@interface for a category. */
    CXCursor_ObjCCategoryDecl              = 12,
    /** \brief An Objective-C \@protocol declaration. */
    CXCursor_ObjCProtocolDecl              = 13,
    /** \brief An Objective-C \@property declaration. */
    CXCursor_ObjCPropertyDecl              = 14,
    /** \brief An Objective-C instance variable. */
    CXCursor_ObjCIvarDecl                  = 15,
    /** \brief An Objective-C instance method. */
    CXCursor_ObjCInstanceMethodDecl        = 16,
    /** \brief An Objective-C class method. */
    CXCursor_ObjCClassMethodDecl           = 17,
    /** \brief An Objective-C \@implementation. */
    CXCursor_ObjCImplementationDecl        = 18,
    /** \brief An Objective-C \@implementation for a category. */
    CXCursor_ObjCCategoryImplDecl          = 19,
    /** \brief A typedef. */
    CXCursor_TypedefDecl                   = 20,
    /** \brief A C++ class method. */
    CXCursor_CXXMethod                     = 21,
    /** \brief A C++ namespace. */
    CXCursor_Namespace                     = 22,
    /** \brief A linkage specification, e.g. 'extern "C"'. */
    CXCursor_LinkageSpec                   = 23,
    /** \brief A C++ constructor. */
    CXCursor_Constructor                   = 24,
    /** \brief A C++ destructor. */
    CXCursor_Destructor                    = 25,
    /** \brief A C++ conversion function. */
    CXCursor_ConversionFunction            = 26,
    /** \brief A C++ template type parameter. */
    CXCursor_TemplateTypeParameter         = 27,
    /** \brief A C++ non-type template parameter. */
    CXCursor_NonTypeTemplateParameter      = 28,
    /** \brief A C++ template template parameter. */
    CXCursor_TemplateTemplateParameter     = 29,
    /** \brief A C++ function template. */
    CXCursor_FunctionTemplate              = 30,
    /** \brief A C++ class template. */
    CXCursor_ClassTemplate                 = 31,
    /** \brief A C++ class template partial specialization. */
    CXCursor_ClassTemplatePartialSpecialization = 32,
    /** \brief A C++ namespace alias declaration. */
    CXCursor_NamespaceAlias                = 33,
    /** \brief A C++ using directive. */
    CXCursor_UsingDirective                = 34,
    /** \brief A C++ using declaration. */
    CXCursor_UsingDeclaration              = 35,
    /** \brief A C++ alias declaration */
    CXCursor_TypeAliasDecl                 = 36,
    /** \brief An Objective-C \@synthesize definition. */
    CXCursor_ObjCSynthesizeDecl            = 37,
    /** \brief An Objective-C \@dynamic definition. */
    CXCursor_ObjCDynamicDecl               = 38,
    /** \brief An access specifier. */
    CXCursor_CXXAccessSpecifier            = 39,
  
    CXCursor_FirstDecl                     = CXCursor_UnexposedDecl,
    CXCursor_LastDecl                      = CXCursor_CXXAccessSpecifier,
  
    /* References */
    CXCursor_FirstRef                      = 40, /* Decl references */
    CXCursor_ObjCSuperClassRef             = 40,
    CXCursor_ObjCProtocolRef               = 41,
    CXCursor_ObjCClassRef                  = 42,
    /**
     * \brief A reference to a type declaration.
     *
     * A type reference occurs anywhere where a type is named but not
     * declared. For example, given:
     *
     * \code
     * typedef unsigned size_type;
     * size_type size;
     * \endcode
     *
     * The typedef is a declaration of size_type (CXCursor_TypedefDecl),
     * while the type of the variable "size" is referenced. The cursor
     * referenced by the type of size is the typedef for size_type.
     */
    CXCursor_TypeRef                       = 43,
    CXCursor_CXXBaseSpecifier              = 44,
    /** 
     * \brief A reference to a class template, function template, template
     * template parameter, or class template partial specialization.
     */
    CXCursor_TemplateRef                   = 45,
    /**
     * \brief A reference to a namespace or namespace alias.
     */
    CXCursor_NamespaceRef                  = 46,
    /**
     * \brief A reference to a member of a struct, union, or class that occurs in 
     * some non-expression context, e.g., a designated initializer.
     */
    CXCursor_MemberRef                     = 47,
    /**
     * \brief A reference to a labeled statement.
     *
     * This cursor kind is used to describe the jump to "start_over" in the 
     * goto statement in the following example:
     *
     * \code
     *   start_over:
     *     ++counter;
     *
     *     goto start_over;
     * \endcode
     *
     * A label reference cursor refers to a label statement.
     */
    CXCursor_LabelRef                      = 48,
    
    /**
     * \brief A reference to a set of overloaded functions or function templates
     * that has not yet been resolved to a specific function or function template.
     *
     * An overloaded declaration reference cursor occurs in C++ templates where
     * a dependent name refers to a function. For example:
     *
     * \code
     * template<typename T> void swap(T&, T&);
     *
     * struct X { ... };
     * void swap(X&, X&);
     *
     * template<typename T>
     * void reverse(T* first, T* last) {
     *   while (first < last - 1) {
     *     swap(*first, *--last);
     *     ++first;
     *   }
     * }
     *
     * struct Y { };
     * void swap(Y&, Y&);
     * \endcode
     *
     * Here, the identifier "swap" is associated with an overloaded declaration
     * reference. In the template definition, "swap" refers to either of the two
     * "swap" functions declared above, so both results will be available. At
     * instantiation time, "swap" may also refer to other functions found via
     * argument-dependent lookup (e.g., the "swap" function at the end of the
     * example).
     *
     * The functions \c clang_getNumOverloadedDecls() and 
     * \c clang_getOverloadedDecl() can be used to retrieve the definitions
     * referenced by this cursor.
     */
    CXCursor_OverloadedDeclRef             = 49,
    
    /**
     * \brief A reference to a variable that occurs in some non-expression 
     * context, e.g., a C++ lambda capture list.
     */
    CXCursor_VariableRef                   = 50,
    
    CXCursor_LastRef                       = CXCursor_VariableRef,
  
    /* Error conditions */
    CXCursor_FirstInvalid                  = 70,
    CXCursor_InvalidFile                   = 70,
    CXCursor_NoDeclFound                   = 71,
    CXCursor_NotImplemented                = 72,
    CXCursor_InvalidCode                   = 73,
    CXCursor_LastInvalid                   = CXCursor_InvalidCode,
  
    /* Expressions */
    CXCursor_FirstExpr                     = 100,
  
    /**
     * \brief An expression whose specific kind is not exposed via this
     * interface.
     *
     * Unexposed expressions have the same operations as any other kind
     * of expression; one can extract their location information,
     * spelling, children, etc. However, the specific kind of the
     * expression is not reported.
     */
    CXCursor_UnexposedExpr                 = 100,
  
    /**
     * \brief An expression that refers to some value declaration, such
     * as a function, variable, or enumerator.
     */
    CXCursor_DeclRefExpr                   = 101,
  
    /**
     * \brief An expression that refers to a member of a struct, union,
     * class, Objective-C class, etc.
     */
    CXCursor_MemberRefExpr                 = 102,
  
    /** \brief An expression that calls a function. */
    CXCursor_CallExpr                      = 103,
  
    /** \brief An expression that sends a message to an Objective-C
     object or class. */
    CXCursor_ObjCMessageExpr               = 104,
  
    /** \brief An expression that represents a block literal. */
    CXCursor_BlockExpr                     = 105,
  
    /** \brief An integer literal.
     */
    CXCursor_IntegerLiteral                = 106,
  
    /** \brief A floating point number literal.
     */
    CXCursor_FloatingLiteral               = 107,
  
    /** \brief An imaginary number literal.
     */
    CXCursor_ImaginaryLiteral              = 108,
  
    /** \brief A string literal.
     */
    CXCursor_StringLiteral                 = 109,
  
    /** \brief A character literal.
     */
    CXCursor_CharacterLiteral              = 110,
  
    /** \brief A parenthesized expression, e.g. "(1)".
     *
     * This AST node is only formed if full location information is requested.
     */
    CXCursor_ParenExpr                     = 111,
  
    /** \brief This represents the unary-expression's (except sizeof and
     * alignof).
     */
    CXCursor_UnaryOperator                 = 112,
  
    /** \brief [C99 6.5.2.1] Array Subscripting.
     */
    CXCursor_ArraySubscriptExpr            = 113,
  
    /** \brief A builtin binary operation expression such as "x + y" or
     * "x <= y".
     */
    CXCursor_BinaryOperator                = 114,
  
    /** \brief Compound assignment such as "+=".
     */
    CXCursor_CompoundAssignOperator        = 115,
  
    /** \brief The ?: ternary operator.
     */
    CXCursor_ConditionalOperator           = 116,
  
    /** \brief An explicit cast in C (C99 6.5.4) or a C-style cast in C++
     * (C++ [expr.cast]), which uses the syntax (Type)expr.
     *
     * For example: (int)f.
     */
    CXCursor_CStyleCastExpr                = 117,
  
    /** \brief [C99 6.5.2.5]
     */
    CXCursor_CompoundLiteralExpr           = 118,
  
    /** \brief Describes an C or C++ initializer list.
     */
    CXCursor_InitListExpr                  = 119,
  
    /** \brief The GNU address of label extension, representing &&label.
     */
    CXCursor_AddrLabelExpr                 = 120,
  
    /** \brief This is the GNU Statement Expression extension: ({int X=4; X;})
     */
    CXCursor_StmtExpr                      = 121,
  
    /** \brief Represents a C11 generic selection.
     */
    CXCursor_GenericSelectionExpr          = 122,
  
    /** \brief Implements the GNU __null extension, which is a name for a null
     * pointer constant that has integral type (e.g., int or long) and is the same
     * size and alignment as a pointer.
     *
     * The __null extension is typically only used by system headers, which define
     * NULL as __null in C++ rather than using 0 (which is an integer that may not
     * match the size of a pointer).
     */
    CXCursor_GNUNullExpr                   = 123,
  
    /** \brief C++'s static_cast<> expression.
     */
    CXCursor_CXXStaticCastExpr             = 124,
  
    /** \brief C++'s dynamic_cast<> expression.
     */
    CXCursor_CXXDynamicCastExpr            = 125,
  
    /** \brief C++'s reinterpret_cast<> expression.
     */
    CXCursor_CXXReinterpretCastExpr        = 126,
  
    /** \brief C++'s const_cast<> expression.
     */
    CXCursor_CXXConstCastExpr              = 127,
  
    /** \brief Represents an explicit C++ type conversion that uses "functional"
     * notion (C++ [expr.type.conv]).
     *
     * Example:
     * \code
     *   x = int(0.5);
     * \endcode
     */
    CXCursor_CXXFunctionalCastExpr         = 128,
  
    /** \brief A C++ typeid expression (C++ [expr.typeid]).
     */
    CXCursor_CXXTypeidExpr                 = 129,
  
    /** \brief [C++ 2.13.5] C++ Boolean Literal.
     */
    CXCursor_CXXBoolLiteralExpr            = 130,
  
    /** \brief [C++0x 2.14.7] C++ Pointer Literal.
     */
    CXCursor_CXXNullPtrLiteralExpr         = 131,
  
    /** \brief Represents the "this" expression in C++
     */
    CXCursor_CXXThisExpr                   = 132,
  
    /** \brief [C++ 15] C++ Throw Expression.
     *
     * This handles 'throw' and 'throw' assignment-expression. When
     * assignment-expression isn't present, Op will be null.
     */
    CXCursor_CXXThrowExpr                  = 133,
  
    /** \brief A new expression for memory allocation and constructor calls, e.g:
     * "new CXXNewExpr(foo)".
     */
    CXCursor_CXXNewExpr                    = 134,
  
    /** \brief A delete expression for memory deallocation and destructor calls,
     * e.g. "delete[] pArray".
     */
    CXCursor_CXXDeleteExpr                 = 135,
  
    /** \brief A unary expression.
     */
    CXCursor_UnaryExpr                     = 136,
  
    /** \brief An Objective-C string literal i.e. @"foo".
     */
    CXCursor_ObjCStringLiteral             = 137,
  
    /** \brief An Objective-C \@encode expression.
     */
    CXCursor_ObjCEncodeExpr                = 138,
  
    /** \brief An Objective-C \@selector expression.
     */
    CXCursor_ObjCSelectorExpr              = 139,
  
    /** \brief An Objective-C \@protocol expression.
     */
    CXCursor_ObjCProtocolExpr              = 140,
  
    /** \brief An Objective-C "bridged" cast expression, which casts between
     * Objective-C pointers and C pointers, transferring ownership in the process.
     *
     * \code
     *   NSString *str = (__bridge_transfer NSString *)CFCreateString();
     * \endcode
     */
    CXCursor_ObjCBridgedCastExpr           = 141,
  
    /** \brief Represents a C++0x pack expansion that produces a sequence of
     * expressions.
     *
     * A pack expansion expression contains a pattern (which itself is an
     * expression) followed by an ellipsis. For example:
     *
     * \code
     * template<typename F, typename ...Types>
     * void forward(F f, Types &&...args) {
     *  f(static_cast<Types&&>(args)...);
     * }
     * \endcode
     */
    CXCursor_PackExpansionExpr             = 142,
  
    /** \brief Represents an expression that computes the length of a parameter
     * pack.
     *
     * \code
     * template<typename ...Types>
     * struct count {
     *   static const unsigned value = sizeof...(Types);
     * };
     * \endcode
     */
    CXCursor_SizeOfPackExpr                = 143,
  
    /* \brief Represents a C++ lambda expression that produces a local function
     * object.
     *
     * \code
     * void abssort(float *x, unsigned N) {
     *   std::sort(x, x + N,
     *             [](float a, float b) {
     *               return std::abs(a) < std::abs(b);
     *             });
     * }
     * \endcode
     */
    CXCursor_LambdaExpr                    = 144,
    
    /** \brief Objective-c Boolean Literal.
     */
    CXCursor_ObjCBoolLiteralExpr           = 145,
  
    /** \brief Represents the "self" expression in an Objective-C method.
     */
    CXCursor_ObjCSelfExpr                  = 146,
  
    /** \brief OpenMP 4.0 [2.4, Array Section].
     */
    CXCursor_OMPArraySectionExpr           = 147,
  
    CXCursor_LastExpr                      = CXCursor_OMPArraySectionExpr,
  
    /* Statements */
    CXCursor_FirstStmt                     = 200,
    /**
     * \brief A statement whose specific kind is not exposed via this
     * interface.
     *
     * Unexposed statements have the same operations as any other kind of
     * statement; one can extract their location information, spelling,
     * children, etc. However, the specific kind of the statement is not
     * reported.
     */
    CXCursor_UnexposedStmt                 = 200,
    
    /** \brief A labelled statement in a function. 
     *
     * This cursor kind is used to describe the "start_over:" label statement in 
     * the following example:
     *
     * \code
     *   start_over:
     *     ++counter;
     * \endcode
     *
     */
    CXCursor_LabelStmt                     = 201,
  
    /** \brief A group of statements like { stmt stmt }.
     *
     * This cursor kind is used to describe compound statements, e.g. function
     * bodies.
     */
    CXCursor_CompoundStmt                  = 202,
  
    /** \brief A case statement.
     */
    CXCursor_CaseStmt                      = 203,
  
    /** \brief A default statement.
     */
    CXCursor_DefaultStmt                   = 204,
  
    /** \brief An if statement
     */
    CXCursor_IfStmt                        = 205,
  
    /** \brief A switch statement.
     */
    CXCursor_SwitchStmt                    = 206,
  
    /** \brief A while statement.
     */
    CXCursor_WhileStmt                     = 207,
  
    /** \brief A do statement.
     */
    CXCursor_DoStmt                        = 208,
  
    /** \brief A for statement.
     */
    CXCursor_ForStmt                       = 209,
  
    /** \brief A goto statement.
     */
    CXCursor_GotoStmt                      = 210,
  
    /** \brief An indirect goto statement.
     */
    CXCursor_IndirectGotoStmt              = 211,
  
    /** \brief A continue statement.
     */
    CXCursor_ContinueStmt                  = 212,
  
    /** \brief A break statement.
     */
    CXCursor_BreakStmt                     = 213,
  
    /** \brief A return statement.
     */
    CXCursor_ReturnStmt                    = 214,
  
    /** \brief A GCC inline assembly statement extension.
     */
    CXCursor_GCCAsmStmt                    = 215,
    CXCursor_AsmStmt                       = CXCursor_GCCAsmStmt,
  
    /** \brief Objective-C's overall \@try-\@catch-\@finally statement.
     */
    CXCursor_ObjCAtTryStmt                 = 216,
  
    /** \brief Objective-C's \@catch statement.
     */
    CXCursor_ObjCAtCatchStmt               = 217,
  
    /** \brief Objective-C's \@finally statement.
     */
    CXCursor_ObjCAtFinallyStmt             = 218,
  
    /** \brief Objective-C's \@throw statement.
     */
    CXCursor_ObjCAtThrowStmt               = 219,
  
    /** \brief Objective-C's \@synchronized statement.
     */
    CXCursor_ObjCAtSynchronizedStmt        = 220,
  
    /** \brief Objective-C's autorelease pool statement.
     */
    CXCursor_ObjCAutoreleasePoolStmt       = 221,
  
    /** \brief Objective-C's collection statement.
     */
    CXCursor_ObjCForCollectionStmt         = 222,
  
    /** \brief C++'s catch statement.
     */
    CXCursor_CXXCatchStmt                  = 223,
  
    /** \brief C++'s try statement.
     */
    CXCursor_CXXTryStmt                    = 224,
  
    /** \brief C++'s for (* : *) statement.
     */
    CXCursor_CXXForRangeStmt               = 225,
  
    /** \brief Windows Structured Exception Handling's try statement.
     */
    CXCursor_SEHTryStmt                    = 226,
  
    /** \brief Windows Structured Exception Handling's except statement.
     */
    CXCursor_SEHExceptStmt                 = 227,
  
    /** \brief Windows Structured Exception Handling's finally statement.
     */
    CXCursor_SEHFinallyStmt                = 228,
  
    /** \brief A MS inline assembly statement extension.
     */
    CXCursor_MSAsmStmt                     = 229,
  
    /** \brief The null statement ";": C99 6.8.3p3.
     *
     * This cursor kind is used to describe the null statement.
     */
    CXCursor_NullStmt                      = 230,
  
    /** \brief Adaptor class for mixing declarations with statements and
     * expressions.
     */
    CXCursor_DeclStmt                      = 231,
  
    /** \brief OpenMP parallel directive.
     */
    CXCursor_OMPParallelDirective          = 232,
  
    /** \brief OpenMP SIMD directive.
     */
    CXCursor_OMPSimdDirective              = 233,
  
    /** \brief OpenMP for directive.
     */
    CXCursor_OMPForDirective               = 234,
  
    /** \brief OpenMP sections directive.
     */
    CXCursor_OMPSectionsDirective          = 235,
  
    /** \brief OpenMP section directive.
     */
    CXCursor_OMPSectionDirective           = 236,
  
    /** \brief OpenMP single directive.
     */
    CXCursor_OMPSingleDirective            = 237,
  
    /** \brief OpenMP parallel for directive.
     */
    CXCursor_OMPParallelForDirective       = 238,
  
    /** \brief OpenMP parallel sections directive.
     */
    CXCursor_OMPParallelSectionsDirective  = 239,
  
    /** \brief OpenMP task directive.
     */
    CXCursor_OMPTaskDirective              = 240,
  
    /** \brief OpenMP master directive.
     */
    CXCursor_OMPMasterDirective            = 241,
  
    /** \brief OpenMP critical directive.
     */
    CXCursor_OMPCriticalDirective          = 242,
  
    /** \brief OpenMP taskyield directive.
     */
    CXCursor_OMPTaskyieldDirective         = 243,
  
    /** \brief OpenMP barrier directive.
     */
    CXCursor_OMPBarrierDirective           = 244,
  
    /** \brief OpenMP taskwait directive.
     */
    CXCursor_OMPTaskwaitDirective          = 245,
  
    /** \brief OpenMP flush directive.
     */
    CXCursor_OMPFlushDirective             = 246,
  
    /** \brief Windows Structured Exception Handling's leave statement.
     */
    CXCursor_SEHLeaveStmt                  = 247,
  
    /** \brief OpenMP ordered directive.
     */
    CXCursor_OMPOrderedDirective           = 248,
  
    /** \brief OpenMP atomic directive.
     */
    CXCursor_OMPAtomicDirective            = 249,
  
    /** \brief OpenMP for SIMD directive.
     */
    CXCursor_OMPForSimdDirective           = 250,
  
    /** \brief OpenMP parallel for SIMD directive.
     */
    CXCursor_OMPParallelForSimdDirective   = 251,
  
    /** \brief OpenMP target directive.
     */
    CXCursor_OMPTargetDirective            = 252,
  
    /** \brief OpenMP teams directive.
     */
    CXCursor_OMPTeamsDirective             = 253,
  
    /** \brief OpenMP taskgroup directive.
     */
    CXCursor_OMPTaskgroupDirective         = 254,
  
    /** \brief OpenMP cancellation point directive.
     */
    CXCursor_OMPCancellationPointDirective = 255,
  
    /** \brief OpenMP cancel directive.
     */
    CXCursor_OMPCancelDirective            = 256,
  
    /** \brief OpenMP target data directive.
     */
    CXCursor_OMPTargetDataDirective        = 257,
  
    CXCursor_LastStmt                      = CXCursor_OMPTargetDataDirective,
  
    /**
     * \brief Cursor that represents the translation unit itself.
     *
     * The translation unit cursor exists primarily to act as the root
     * cursor for traversing the contents of a translation unit.
     */
    CXCursor_TranslationUnit               = 300,
  
    /* Attributes */
    CXCursor_FirstAttr                     = 400,
    /**
     * \brief An attribute whose specific kind is not exposed via this
     * interface.
     */
    CXCursor_UnexposedAttr                 = 400,
  
    CXCursor_IBActionAttr                  = 401,
    CXCursor_IBOutletAttr                  = 402,
    CXCursor_IBOutletCollectionAttr        = 403,
    CXCursor_CXXFinalAttr                  = 404,
    CXCursor_CXXOverrideAttr               = 405,
    CXCursor_AnnotateAttr                  = 406,
    CXCursor_AsmLabelAttr                  = 407,
    CXCursor_PackedAttr                    = 408,
    CXCursor_PureAttr                      = 409,
    CXCursor_ConstAttr                     = 410,
    CXCursor_NoDuplicateAttr               = 411,
    CXCursor_CUDAConstantAttr              = 412,
    CXCursor_CUDADeviceAttr                = 413,
    CXCursor_CUDAGlobalAttr                = 414,
    CXCursor_CUDAHostAttr                  = 415,
    CXCursor_CUDASharedAttr                = 416,
    CXCursor_VisibilityAttr                = 417,
    CXCursor_LastAttr                      = CXCursor_VisibilityAttr,
  
    /* Preprocessing */
    CXCursor_PreprocessingDirective        = 500,
    CXCursor_MacroDefinition               = 501,
    CXCursor_MacroExpansion                = 502,
    CXCursor_MacroInstantiation            = CXCursor_MacroExpansion,
    CXCursor_InclusionDirective            = 503,
    CXCursor_FirstPreprocessing            = CXCursor_PreprocessingDirective,
    CXCursor_LastPreprocessing             = CXCursor_InclusionDirective,
  
    /* Extra Declarations */
    /**
     * \brief A module import declaration.
     */
    CXCursor_ModuleImportDecl              = 600,
    CXCursor_TypeAliasTemplateDecl         = 601,
    CXCursor_FirstExtraDecl                = CXCursor_ModuleImportDecl,
    CXCursor_LastExtraDecl                 = CXCursor_TypeAliasTemplateDecl,
  
    /**
     * \brief A code completion overload candidate.
     */
    CXCursor_OverloadCandidate             = 700
  };
  
  /**
   * \brief A cursor representing some element in the abstract syntax tree for
   * a translation unit.
   *
   * The cursor abstraction unifies the different kinds of entities in a
   * program--declaration, statements, expressions, references to declarations,
   * etc.--under a single "cursor" abstraction with a common set of operations.
   * Common operation for a cursor include: getting the physical location in
   * a source file where the cursor points, getting the name associated with a
   * cursor, and retrieving cursors for any child nodes of a particular cursor.
   *
   * Cursors can be produced in two specific ways.
   * clang_getTranslationUnitCursor() produces a cursor for a translation unit,
   * from which one can use clang_visitChildren() to explore the rest of the
   * translation unit. clang_getCursor() maps from a physical source location
   * to the entity that resides at that location, allowing one to map from the
   * source code into the AST.
   */
  typedef struct {
    enum CXCursorKind kind;
    int xdata;
    const void *data[3];
  } CXCursor;
  
  /**
   * \defgroup CINDEX_CURSOR_MANIP Cursor manipulations
   *
   * @{
   */
  
  /**
   * \brief Retrieve the NULL cursor, which represents no entity.
   */
  CINDEX_LINKAGE CXCursor clang_getNullCursor(void);
  
  /**
   * \brief Retrieve the cursor that represents the given translation unit.
   *
   * The translation unit cursor can be used to start traversing the
   * various declarations within the given translation unit.
   */
  CINDEX_LINKAGE CXCursor clang_getTranslationUnitCursor(CXTranslationUnit);
  
  /**
   * \brief Determine whether two cursors are equivalent.
   */
  CINDEX_LINKAGE unsigned clang_equalCursors(CXCursor, CXCursor);
  
  /**
   * \brief Returns non-zero if \p cursor is null.
   */
  CINDEX_LINKAGE int clang_Cursor_isNull(CXCursor cursor);
  
  /**
   * \brief Compute a hash value for the given cursor.
   */
  CINDEX_LINKAGE unsigned clang_hashCursor(CXCursor);
    
  /**
   * \brief Retrieve the kind of the given cursor.
   */
  CINDEX_LINKAGE enum CXCursorKind clang_getCursorKind(CXCursor);
  
  /**
   * \brief Determine whether the given cursor kind represents a declaration.
   */
  CINDEX_LINKAGE unsigned clang_isDeclaration(enum CXCursorKind);
  
  /**
   * \brief Determine whether the given cursor kind represents a simple
   * reference.
   *
   * Note that other kinds of cursors (such as expressions) can also refer to
   * other cursors. Use clang_getCursorReferenced() to determine whether a
   * particular cursor refers to another entity.
   */
  CINDEX_LINKAGE unsigned clang_isReference(enum CXCursorKind);
  
  /**
   * \brief Determine whether the given cursor kind represents an expression.
   */
  CINDEX_LINKAGE unsigned clang_isExpression(enum CXCursorKind);
  
  /**
   * \brief Determine whether the given cursor kind represents a statement.
   */
  CINDEX_LINKAGE unsigned clang_isStatement(enum CXCursorKind);
  
  /**
   * \brief Determine whether the given cursor kind represents an attribute.
   */
  CINDEX_LINKAGE unsigned clang_isAttribute(enum CXCursorKind);
  
  /**
   * \brief Determine whether the given cursor kind represents an invalid
   * cursor.
   */
  CINDEX_LINKAGE unsigned clang_isInvalid(enum CXCursorKind);
  
  /**
   * \brief Determine whether the given cursor kind represents a translation
   * unit.
   */
  CINDEX_LINKAGE unsigned clang_isTranslationUnit(enum CXCursorKind);
  
  /***
   * \brief Determine whether the given cursor represents a preprocessing
   * element, such as a preprocessor directive or macro instantiation.
   */
  CINDEX_LINKAGE unsigned clang_isPreprocessing(enum CXCursorKind);
    
  /***
   * \brief Determine whether the given cursor represents a currently
   *  unexposed piece of the AST (e.g., CXCursor_UnexposedStmt).
   */
  CINDEX_LINKAGE unsigned clang_isUnexposed(enum CXCursorKind);
  
  /**
   * \brief Describe the linkage of the entity referred to by a cursor.
   */
  enum CXLinkageKind {
    /** \brief This value indicates that no linkage information is available
     * for a provided CXCursor. */
    CXLinkage_Invalid,
    /**
     * \brief This is the linkage for variables, parameters, and so on that
     *  have automatic storage.  This covers normal (non-extern) local variables.
     */
    CXLinkage_NoLinkage,
    /** \brief This is the linkage for static variables and static functions. */
    CXLinkage_Internal,
    /** \brief This is the linkage for entities with external linkage that live
     * in C++ anonymous namespaces.*/
    CXLinkage_UniqueExternal,
    /** \brief This is the linkage for entities with true, external linkage. */
    CXLinkage_External
  };
  
  /**
   * \brief Determine the linkage of the entity referred to by a given cursor.
   */
  CINDEX_LINKAGE enum CXLinkageKind clang_getCursorLinkage(CXCursor cursor);
  
  enum CXVisibilityKind {
    /** \brief This value indicates that no visibility information is available
     * for a provided CXCursor. */
    CXVisibility_Invalid,
  
    /** \brief Symbol not seen by the linker. */
    CXVisibility_Hidden,
    /** \brief Symbol seen by the linker but resolves to a symbol inside this object. */
    CXVisibility_Protected,
    /** \brief Symbol seen by the linker and acts like a normal symbol. */
    CXVisibility_Default
  };
  
  /**
   * \brief Describe the visibility of the entity referred to by a cursor.
   *
   * This returns the default visibility if not explicitly specified by
   * a visibility attribute. The default visibility may be changed by
   * commandline arguments.
   *
   * \param cursor The cursor to query.
   *
   * \returns The visibility of the cursor.
   */
  CINDEX_LINKAGE enum CXVisibilityKind clang_getCursorVisibility(CXCursor cursor);
  
  /**
   * \brief Determine the availability of the entity that this cursor refers to,
   * taking the current target platform into account.
   *
   * \param cursor The cursor to query.
   *
   * \returns The availability of the cursor.
   */
  CINDEX_LINKAGE enum CXAvailabilityKind 
  clang_getCursorAvailability(CXCursor cursor);
  
  /**
   * Describes the availability of a given entity on a particular platform, e.g.,
   * a particular class might only be available on Mac OS 10.7 or newer.
   */
  typedef struct CXPlatformAvailability {
    /**
     * \brief A string that describes the platform for which this structure
     * provides availability information.
     *
     * Possible values are "ios" or "macosx".
     */
    CXString Platform;
    /**
     * \brief The version number in which this entity was introduced.
     */
    CXVersion Introduced;
    /**
     * \brief The version number in which this entity was deprecated (but is
     * still available).
     */
    CXVersion Deprecated;
    /**
     * \brief The version number in which this entity was obsoleted, and therefore
     * is no longer available.
     */
    CXVersion Obsoleted;
    /**
     * \brief Whether the entity is unconditionally unavailable on this platform.
     */
    int Unavailable;
    /**
     * \brief An optional message to provide to a user of this API, e.g., to
     * suggest replacement APIs.
     */
    CXString Message;
  } CXPlatformAvailability;
  
  /**
   * \brief Determine the availability of the entity that this cursor refers to
   * on any platforms for which availability information is known.
   *
   * \param cursor The cursor to query.
   *
   * \param always_deprecated If non-NULL, will be set to indicate whether the 
   * entity is deprecated on all platforms.
   *
   * \param deprecated_message If non-NULL, will be set to the message text 
   * provided along with the unconditional deprecation of this entity. The client
   * is responsible for deallocating this string.
   *
   * \param always_unavailable If non-NULL, will be set to indicate whether the
   * entity is unavailable on all platforms.
   *
   * \param unavailable_message If non-NULL, will be set to the message text
   * provided along with the unconditional unavailability of this entity. The 
   * client is responsible for deallocating this string.
   *
   * \param availability If non-NULL, an array of CXPlatformAvailability instances
   * that will be populated with platform availability information, up to either
   * the number of platforms for which availability information is available (as
   * returned by this function) or \c availability_size, whichever is smaller.
   *
   * \param availability_size The number of elements available in the 
   * \c availability array.
   *
   * \returns The number of platforms (N) for which availability information is
   * available (which is unrelated to \c availability_size).
   *
   * Note that the client is responsible for calling 
   * \c clang_disposeCXPlatformAvailability to free each of the 
   * platform-availability structures returned. There are 
   * \c min(N, availability_size) such structures.
   */
  CINDEX_LINKAGE int
  clang_getCursorPlatformAvailability(CXCursor cursor,
                                      int *always_deprecated,
                                      CXString *deprecated_message,
                                      int *always_unavailable,
                                      CXString *unavailable_message,
                                      CXPlatformAvailability *availability,
                                      int availability_size);
  
  /**
   * \brief Free the memory associated with a \c CXPlatformAvailability structure.
   */
  CINDEX_LINKAGE void
  clang_disposeCXPlatformAvailability(CXPlatformAvailability *availability);
    
  /**
   * \brief Describe the "language" of the entity referred to by a cursor.
   */
  enum CXLanguageKind {
    CXLanguage_Invalid = 0,
    CXLanguage_C,
    CXLanguage_ObjC,
    CXLanguage_CPlusPlus
  };
  
  /**
   * \brief Determine the "language" of the entity referred to by a given cursor.
   */
  CINDEX_LINKAGE enum CXLanguageKind clang_getCursorLanguage(CXCursor cursor);
  
  /**
   * \brief Returns the translation unit that a cursor originated from.
   */
  CINDEX_LINKAGE CXTranslationUnit clang_Cursor_getTranslationUnit(CXCursor);
  
  
  /**
   * \brief A fast container representing a set of CXCursors.
   */
  typedef struct CXCursorSetImpl *CXCursorSet;
  
  /**
   * \brief Creates an empty CXCursorSet.
   */
  CINDEX_LINKAGE CXCursorSet clang_createCXCursorSet(void);
  
  /**
   * \brief Disposes a CXCursorSet and releases its associated memory.
   */
  CINDEX_LINKAGE void clang_disposeCXCursorSet(CXCursorSet cset);
  
  /**
   * \brief Queries a CXCursorSet to see if it contains a specific CXCursor.
   *
   * \returns non-zero if the set contains the specified cursor.
  */
  CINDEX_LINKAGE unsigned clang_CXCursorSet_contains(CXCursorSet cset,
                                                     CXCursor cursor);
  
  /**
   * \brief Inserts a CXCursor into a CXCursorSet.
   *
   * \returns zero if the CXCursor was already in the set, and non-zero otherwise.
  */
  CINDEX_LINKAGE unsigned clang_CXCursorSet_insert(CXCursorSet cset,
                                                   CXCursor cursor);
  
  /**
   * \brief Determine the semantic parent of the given cursor.
   *
   * The semantic parent of a cursor is the cursor that semantically contains
   * the given \p cursor. For many declarations, the lexical and semantic parents
   * are equivalent (the lexical parent is returned by 
   * \c clang_getCursorLexicalParent()). They diverge when declarations or
   * definitions are provided out-of-line. For example:
   *
   * \code
   * class C {
   *  void f();
   * };
   *
   * void C::f() { }
   * \endcode
   *
   * In the out-of-line definition of \c C::f, the semantic parent is
   * the class \c C, of which this function is a member. The lexical parent is
   * the place where the declaration actually occurs in the source code; in this
   * case, the definition occurs in the translation unit. In general, the
   * lexical parent for a given entity can change without affecting the semantics
   * of the program, and the lexical parent of different declarations of the
   * same entity may be different. Changing the semantic parent of a declaration,
   * on the other hand, can have a major impact on semantics, and redeclarations
   * of a particular entity should all have the same semantic context.
   *
   * In the example above, both declarations of \c C::f have \c C as their
   * semantic context, while the lexical context of the first \c C::f is \c C
   * and the lexical context of the second \c C::f is the translation unit.
   *
   * For global declarations, the semantic parent is the translation unit.
   */
  CINDEX_LINKAGE CXCursor clang_getCursorSemanticParent(CXCursor cursor);
  
  /**
   * \brief Determine the lexical parent of the given cursor.
   *
   * The lexical parent of a cursor is the cursor in which the given \p cursor
   * was actually written. For many declarations, the lexical and semantic parents
   * are equivalent (the semantic parent is returned by 
   * \c clang_getCursorSemanticParent()). They diverge when declarations or
   * definitions are provided out-of-line. For example:
   *
   * \code
   * class C {
   *  void f();
   * };
   *
   * void C::f() { }
   * \endcode
   *
   * In the out-of-line definition of \c C::f, the semantic parent is
   * the class \c C, of which this function is a member. The lexical parent is
   * the place where the declaration actually occurs in the source code; in this
   * case, the definition occurs in the translation unit. In general, the
   * lexical parent for a given entity can change without affecting the semantics
   * of the program, and the lexical parent of different declarations of the
   * same entity may be different. Changing the semantic parent of a declaration,
   * on the other hand, can have a major impact on semantics, and redeclarations
   * of a particular entity should all have the same semantic context.
   *
   * In the example above, both declarations of \c C::f have \c C as their
   * semantic context, while the lexical context of the first \c C::f is \c C
   * and the lexical context of the second \c C::f is the translation unit.
   *
   * For declarations written in the global scope, the lexical parent is
   * the translation unit.
   */
  CINDEX_LINKAGE CXCursor clang_getCursorLexicalParent(CXCursor cursor);
  
  /**
   * \brief Determine the set of methods that are overridden by the given
   * method.
   *
   * In both Objective-C and C++, a method (aka virtual member function,
   * in C++) can override a virtual method in a base class. For
   * Objective-C, a method is said to override any method in the class's
   * base class, its protocols, or its categories' protocols, that has the same
   * selector and is of the same kind (class or instance).
   * If no such method exists, the search continues to the class's superclass,
   * its protocols, and its categories, and so on. A method from an Objective-C
   * implementation is considered to override the same methods as its
   * corresponding method in the interface.
   *
   * For C++, a virtual member function overrides any virtual member
   * function with the same signature that occurs in its base
   * classes. With multiple inheritance, a virtual member function can
   * override several virtual member functions coming from different
   * base classes.
   *
   * In all cases, this function determines the immediate overridden
   * method, rather than all of the overridden methods. For example, if
   * a method is originally declared in a class A, then overridden in B
   * (which in inherits from A) and also in C (which inherited from B),
   * then the only overridden method returned from this function when
   * invoked on C's method will be B's method. The client may then
   * invoke this function again, given the previously-found overridden
   * methods, to map out the complete method-override set.
   *
   * \param cursor A cursor representing an Objective-C or C++
   * method. This routine will compute the set of methods that this
   * method overrides.
   * 
   * \param overridden A pointer whose pointee will be replaced with a
   * pointer to an array of cursors, representing the set of overridden
   * methods. If there are no overridden methods, the pointee will be
   * set to NULL. The pointee must be freed via a call to 
   * \c clang_disposeOverriddenCursors().
   *
   * \param num_overridden A pointer to the number of overridden
   * functions, will be set to the number of overridden functions in the
   * array pointed to by \p overridden.
   */
  CINDEX_LINKAGE void clang_getOverriddenCursors(CXCursor cursor, 
                                                 CXCursor **overridden,
                                                 unsigned *num_overridden);
  
  /**
   * \brief Free the set of overridden cursors returned by \c
   * clang_getOverriddenCursors().
   */
  CINDEX_LINKAGE void clang_disposeOverriddenCursors(CXCursor *overridden);
  
  /**
   * \brief Retrieve the file that is included by the given inclusion directive
   * cursor.
   */
  CINDEX_LINKAGE CXFile clang_getIncludedFile(CXCursor cursor);
    
  /**
   * @}
   */
  
  /**
   * \defgroup CINDEX_CURSOR_SOURCE Mapping between cursors and source code
   *
   * Cursors represent a location within the Abstract Syntax Tree (AST). These
   * routines help map between cursors and the physical locations where the
   * described entities occur in the source code. The mapping is provided in
   * both directions, so one can map from source code to the AST and back.
   *
   * @{
   */
  
  /**
   * \brief Map a source location to the cursor that describes the entity at that
   * location in the source code.
   *
   * clang_getCursor() maps an arbitrary source location within a translation
   * unit down to the most specific cursor that describes the entity at that
   * location. For example, given an expression \c x + y, invoking
   * clang_getCursor() with a source location pointing to "x" will return the
   * cursor for "x"; similarly for "y". If the cursor points anywhere between
   * "x" or "y" (e.g., on the + or the whitespace around it), clang_getCursor()
   * will return a cursor referring to the "+" expression.
   *
   * \returns a cursor representing the entity at the given source location, or
   * a NULL cursor if no such entity can be found.
   */
  CINDEX_LINKAGE CXCursor clang_getCursor(CXTranslationUnit, CXSourceLocation);
  
  /**
   * \brief Retrieve the physical location of the source constructor referenced
   * by the given cursor.
   *
   * The location of a declaration is typically the location of the name of that
   * declaration, where the name of that declaration would occur if it is
   * unnamed, or some keyword that introduces that particular declaration.
   * The location of a reference is where that reference occurs within the
   * source code.
   */
  CINDEX_LINKAGE CXSourceLocation clang_getCursorLocation(CXCursor);
  
  /**
   * \brief Retrieve the physical extent of the source construct referenced by
   * the given cursor.
   *
   * The extent of a cursor starts with the file/line/column pointing at the
   * first character within the source construct that the cursor refers to and
   * ends with the last character within that source construct. For a
   * declaration, the extent covers the declaration itself. For a reference,
   * the extent covers the location of the reference (e.g., where the referenced
   * entity was actually used).
   */
  CINDEX_LINKAGE CXSourceRange clang_getCursorExtent(CXCursor);
  
  /**
   * @}
   */
      
  /**
   * \defgroup CINDEX_TYPES Type information for CXCursors
   *
   * @{
   */
  
  /**
   * \brief Describes the kind of type
   */
  enum CXTypeKind {
    /**
     * \brief Represents an invalid type (e.g., where no type is available).
     */
    CXType_Invalid = 0,
  
    /**
     * \brief A type whose specific kind is not exposed via this
     * interface.
     */
    CXType_Unexposed = 1,
  
    /* Builtin types */
    CXType_Void = 2,
    CXType_Bool = 3,
    CXType_Char_U = 4,
    CXType_UChar = 5,
    CXType_Char16 = 6,
    CXType_Char32 = 7,
    CXType_UShort = 8,
    CXType_UInt = 9,
    CXType_ULong = 10,
    CXType_ULongLong = 11,
    CXType_UInt128 = 12,
    CXType_Char_S = 13,
    CXType_SChar = 14,
    CXType_WChar = 15,
    CXType_Short = 16,
    CXType_Int = 17,
    CXType_Long = 18,
    CXType_LongLong = 19,
    CXType_Int128 = 20,
    CXType_Float = 21,
    CXType_Double = 22,
    CXType_LongDouble = 23,
    CXType_NullPtr = 24,
    CXType_Overload = 25,
    CXType_Dependent = 26,
    CXType_ObjCId = 27,
    CXType_ObjCClass = 28,
    CXType_ObjCSel = 29,
    CXType_FirstBuiltin = CXType_Void,
    CXType_LastBuiltin  = CXType_ObjCSel,
  
    CXType_Complex = 100,
    CXType_Pointer = 101,
    CXType_BlockPointer = 102,
    CXType_LValueReference = 103,
    CXType_RValueReference = 104,
    CXType_Record = 105,
    CXType_Enum = 106,
    CXType_Typedef = 107,
    CXType_ObjCInterface = 108,
    CXType_ObjCObjectPointer = 109,
    CXType_FunctionNoProto = 110,
    CXType_FunctionProto = 111,
    CXType_ConstantArray = 112,
    CXType_Vector = 113,
    CXType_IncompleteArray = 114,
    CXType_VariableArray = 115,
    CXType_DependentSizedArray = 116,
    CXType_MemberPointer = 117,
    CXType_Auto = 118
  };
  
  /**
   * \brief Describes the calling convention of a function type
   */
  enum CXCallingConv {
    CXCallingConv_Default = 0,
    CXCallingConv_C = 1,
    CXCallingConv_X86StdCall = 2,
    CXCallingConv_X86FastCall = 3,
    CXCallingConv_X86ThisCall = 4,
    CXCallingConv_X86Pascal = 5,
    CXCallingConv_AAPCS = 6,
    CXCallingConv_AAPCS_VFP = 7,
    /* Value 8 was PnaclCall, but it was never used, so it could safely be re-used. */
    CXCallingConv_IntelOclBicc = 9,
    CXCallingConv_X86_64Win64 = 10,
    CXCallingConv_X86_64SysV = 11,
    CXCallingConv_X86VectorCall = 12,
  
    CXCallingConv_Invalid = 100,
    CXCallingConv_Unexposed = 200
  };
  
  
  /**
   * \brief The type of an element in the abstract syntax tree.
   *
   */
  typedef struct {
    enum CXTypeKind kind;
    void *data[2];
  } CXType;
  
  /**
   * \brief Retrieve the type of a CXCursor (if any).
   */
  CINDEX_LINKAGE CXType clang_getCursorType(CXCursor C);
  
  /**
   * \brief Pretty-print the underlying type using the rules of the
   * language of the translation unit from which it came.
   *
   * If the type is invalid, an empty string is returned.
   */
  CINDEX_LINKAGE CXString clang_getTypeSpelling(CXType CT);
  
  /**
   * \brief Retrieve the underlying type of a typedef declaration.
   *
   * If the cursor does not reference a typedef declaration, an invalid type is
   * returned.
   */
  CINDEX_LINKAGE CXType clang_getTypedefDeclUnderlyingType(CXCursor C);
  
  /**
   * \brief Retrieve the integer type of an enum declaration.
   *
   * If the cursor does not reference an enum declaration, an invalid type is
   * returned.
   */
  CINDEX_LINKAGE CXType clang_getEnumDeclIntegerType(CXCursor C);
  
  /**
   * \brief Retrieve the integer value of an enum constant declaration as a signed
   *  long long.
   *
   * If the cursor does not reference an enum constant declaration, LLONG_MIN is returned.
   * Since this is also potentially a valid constant value, the kind of the cursor
   * must be verified before calling this function.
   */
  CINDEX_LINKAGE long long clang_getEnumConstantDeclValue(CXCursor C);
  
  /**
   * \brief Retrieve the integer value of an enum constant declaration as an unsigned
   *  long long.
   *
   * If the cursor does not reference an enum constant declaration, ULLONG_MAX is returned.
   * Since this is also potentially a valid constant value, the kind of the cursor
   * must be verified before calling this function.
   */
  CINDEX_LINKAGE unsigned long long clang_getEnumConstantDeclUnsignedValue(CXCursor C);
  
  /**
   * \brief Retrieve the bit width of a bit field declaration as an integer.
   *
   * If a cursor that is not a bit field declaration is passed in, -1 is returned.
   */
  CINDEX_LINKAGE int clang_getFieldDeclBitWidth(CXCursor C);
  
  /**
   * \brief Retrieve the number of non-variadic arguments associated with a given
   * cursor.
   *
   * The number of arguments can be determined for calls as well as for
   * declarations of functions or methods. For other cursors -1 is returned.
   */
  CINDEX_LINKAGE int clang_Cursor_getNumArguments(CXCursor C);
  
  /**
   * \brief Retrieve the argument cursor of a function or method.
   *
   * The argument cursor can be determined for calls as well as for declarations
   * of functions or methods. For other cursors and for invalid indices, an
   * invalid cursor is returned.
   */
  CINDEX_LINKAGE CXCursor clang_Cursor_getArgument(CXCursor C, unsigned i);
  
  /**
   * \brief Describes the kind of a template argument.
   *
   * See the definition of llvm::clang::TemplateArgument::ArgKind for full
   * element descriptions.
   */
  enum CXTemplateArgumentKind {
    CXTemplateArgumentKind_Null,
    CXTemplateArgumentKind_Type,
    CXTemplateArgumentKind_Declaration,
    CXTemplateArgumentKind_NullPtr,
    CXTemplateArgumentKind_Integral,
    CXTemplateArgumentKind_Template,
    CXTemplateArgumentKind_TemplateExpansion,
    CXTemplateArgumentKind_Expression,
    CXTemplateArgumentKind_Pack,
    /* Indicates an error case, preventing the kind from being deduced. */
    CXTemplateArgumentKind_Invalid
  };
  
  /**
   *\brief Returns the number of template args of a function decl representing a
   * template specialization.
   *
   * If the argument cursor cannot be converted into a template function
   * declaration, -1 is returned.
   *
   * For example, for the following declaration and specialization:
   *   template <typename T, int kInt, bool kBool>
   *   void foo() { ... }
   *
   *   template <>
   *   void foo<float, -7, true>();
   *
   * The value 3 would be returned from this call.
   */
  CINDEX_LINKAGE int clang_Cursor_getNumTemplateArguments(CXCursor C);
  
  /**
   * \brief Retrieve the kind of the I'th template argument of the CXCursor C.
   *
   * If the argument CXCursor does not represent a FunctionDecl, an invalid
   * template argument kind is returned.
   *
   * For example, for the following declaration and specialization:
   *   template <typename T, int kInt, bool kBool>
   *   void foo() { ... }
   *
   *   template <>
   *   void foo<float, -7, true>();
   *
   * For I = 0, 1, and 2, Type, Integral, and Integral will be returned,
   * respectively.
   */
  CINDEX_LINKAGE enum CXTemplateArgumentKind clang_Cursor_getTemplateArgumentKind(
      CXCursor C, unsigned I);
  
  /**
   * \brief Retrieve a CXType representing the type of a TemplateArgument of a
   *  function decl representing a template specialization.
   *
   * If the argument CXCursor does not represent a FunctionDecl whose I'th
   * template argument has a kind of CXTemplateArgKind_Integral, an invalid type
   * is returned.
   *
   * For example, for the following declaration and specialization:
   *   template <typename T, int kInt, bool kBool>
   *   void foo() { ... }
   *
   *   template <>
   *   void foo<float, -7, true>();
   *
   * If called with I = 0, "float", will be returned.
   * Invalid types will be returned for I == 1 or 2.
   */
  CINDEX_LINKAGE CXType clang_Cursor_getTemplateArgumentType(CXCursor C,
                                                             unsigned I);
  
  /**
   * \brief Retrieve the value of an Integral TemplateArgument (of a function
   *  decl representing a template specialization) as a signed long long.
   *
   * It is undefined to call this function on a CXCursor that does not represent a
   * FunctionDecl or whose I'th template argument is not an integral value.
   *
   * For example, for the following declaration and specialization:
   *   template <typename T, int kInt, bool kBool>
   *   void foo() { ... }
   *
   *   template <>
   *   void foo<float, -7, true>();
   *
   * If called with I = 1 or 2, -7 or true will be returned, respectively.
   * For I == 0, this function's behavior is undefined.
   */
  CINDEX_LINKAGE long long clang_Cursor_getTemplateArgumentValue(CXCursor C,
                                                                 unsigned I);
  
  /**
   * \brief Retrieve the value of an Integral TemplateArgument (of a function
   *  decl representing a template specialization) as an unsigned long long.
   *
   * It is undefined to call this function on a CXCursor that does not represent a
   * FunctionDecl or whose I'th template argument is not an integral value.
   *
   * For example, for the following declaration and specialization:
   *   template <typename T, int kInt, bool kBool>
   *   void foo() { ... }
   *
   *   template <>
   *   void foo<float, 2147483649, true>();
   *
   * If called with I = 1 or 2, 2147483649 or true will be returned, respectively.
   * For I == 0, this function's behavior is undefined.
   */
  CINDEX_LINKAGE unsigned long long clang_Cursor_getTemplateArgumentUnsignedValue(
      CXCursor C, unsigned I);
  
  /**
   * \brief Determine whether two CXTypes represent the same type.
   *
   * \returns non-zero if the CXTypes represent the same type and
   *          zero otherwise.
   */
  CINDEX_LINKAGE unsigned clang_equalTypes(CXType A, CXType B);
  
  /**
   * \brief Return the canonical type for a CXType.
   *
   * Clang's type system explicitly models typedefs and all the ways
   * a specific type can be represented.  The canonical type is the underlying
   * type with all the "sugar" removed.  For example, if 'T' is a typedef
   * for 'int', the canonical type for 'T' would be 'int'.
   */
  CINDEX_LINKAGE CXType clang_getCanonicalType(CXType T);
  
  /**
   * \brief Determine whether a CXType has the "const" qualifier set,
   * without looking through typedefs that may have added "const" at a
   * different level.
   */
  CINDEX_LINKAGE unsigned clang_isConstQualifiedType(CXType T);
  
  /**
   * \brief Determine whether a CXType has the "volatile" qualifier set,
   * without looking through typedefs that may have added "volatile" at
   * a different level.
   */
  CINDEX_LINKAGE unsigned clang_isVolatileQualifiedType(CXType T);
  
  /**
   * \brief Determine whether a CXType has the "restrict" qualifier set,
   * without looking through typedefs that may have added "restrict" at a
   * different level.
   */
  CINDEX_LINKAGE unsigned clang_isRestrictQualifiedType(CXType T);
  
  /**
   * \brief For pointer types, returns the type of the pointee.
   */
  CINDEX_LINKAGE CXType clang_getPointeeType(CXType T);
  
  /**
   * \brief Return the cursor for the declaration of the given type.
   */
  CINDEX_LINKAGE CXCursor clang_getTypeDeclaration(CXType T);
  
  /**
   * Returns the Objective-C type encoding for the specified declaration.
   */
  CINDEX_LINKAGE CXString clang_getDeclObjCTypeEncoding(CXCursor C);
  
  /**
   * \brief Retrieve the spelling of a given CXTypeKind.
   */
  CINDEX_LINKAGE CXString clang_getTypeKindSpelling(enum CXTypeKind K);
  
  /**
   * \brief Retrieve the calling convention associated with a function type.
   *
   * If a non-function type is passed in, CXCallingConv_Invalid is returned.
   */
  CINDEX_LINKAGE enum CXCallingConv clang_getFunctionTypeCallingConv(CXType T);
  
  /**
   * \brief Retrieve the return type associated with a function type.
   *
   * If a non-function type is passed in, an invalid type is returned.
   */
  CINDEX_LINKAGE CXType clang_getResultType(CXType T);
  
  /**
   * \brief Retrieve the number of non-variadic parameters associated with a
   * function type.
   *
   * If a non-function type is passed in, -1 is returned.
   */
  CINDEX_LINKAGE int clang_getNumArgTypes(CXType T);
  
  /**
   * \brief Retrieve the type of a parameter of a function type.
   *
   * If a non-function type is passed in or the function does not have enough
   * parameters, an invalid type is returned.
   */
  CINDEX_LINKAGE CXType clang_getArgType(CXType T, unsigned i);
  
  /**
   * \brief Return 1 if the CXType is a variadic function type, and 0 otherwise.
   */
  CINDEX_LINKAGE unsigned clang_isFunctionTypeVariadic(CXType T);
  
  /**
   * \brief Retrieve the return type associated with a given cursor.
   *
   * This only returns a valid type if the cursor refers to a function or method.
   */
  CINDEX_LINKAGE CXType clang_getCursorResultType(CXCursor C);
  
  /**
   * \brief Return 1 if the CXType is a POD (plain old data) type, and 0
   *  otherwise.
   */
  CINDEX_LINKAGE unsigned clang_isPODType(CXType T);
  
  /**
   * \brief Return the element type of an array, complex, or vector type.
   *
   * If a type is passed in that is not an array, complex, or vector type,
   * an invalid type is returned.
   */
  CINDEX_LINKAGE CXType clang_getElementType(CXType T);
  
  /**
   * \brief Return the number of elements of an array or vector type.
   *
   * If a type is passed in that is not an array or vector type,
   * -1 is returned.
   */
  CINDEX_LINKAGE long long clang_getNumElements(CXType T);
  
  /**
   * \brief Return the element type of an array type.
   *
   * If a non-array type is passed in, an invalid type is returned.
   */
  CINDEX_LINKAGE CXType clang_getArrayElementType(CXType T);
  
  /**
   * \brief Return the array size of a constant array.
   *
   * If a non-array type is passed in, -1 is returned.
   */
  CINDEX_LINKAGE long long clang_getArraySize(CXType T);
  
  /**
   * \brief List the possible error codes for \c clang_Type_getSizeOf,
   *   \c clang_Type_getAlignOf, \c clang_Type_getOffsetOf and
   *   \c clang_Cursor_getOffsetOf.
   *
   * A value of this enumeration type can be returned if the target type is not
   * a valid argument to sizeof, alignof or offsetof.
   */
  enum CXTypeLayoutError {
    /**
     * \brief Type is of kind CXType_Invalid.
     */
    CXTypeLayoutError_Invalid = -1,
    /**
     * \brief The type is an incomplete Type.
     */
    CXTypeLayoutError_Incomplete = -2,
    /**
     * \brief The type is a dependent Type.
     */
    CXTypeLayoutError_Dependent = -3,
    /**
     * \brief The type is not a constant size type.
     */
    CXTypeLayoutError_NotConstantSize = -4,
    /**
     * \brief The Field name is not valid for this record.
     */
    CXTypeLayoutError_InvalidFieldName = -5
  };
  
  /**
   * \brief Return the alignment of a type in bytes as per C++[expr.alignof]
   *   standard.
   *
   * If the type declaration is invalid, CXTypeLayoutError_Invalid is returned.
   * If the type declaration is an incomplete type, CXTypeLayoutError_Incomplete
   *   is returned.
   * If the type declaration is a dependent type, CXTypeLayoutError_Dependent is
   *   returned.
   * If the type declaration is not a constant size type,
   *   CXTypeLayoutError_NotConstantSize is returned.
   */
  CINDEX_LINKAGE long long clang_Type_getAlignOf(CXType T);
  
  /**
   * \brief Return the class type of an member pointer type.
   *
   * If a non-member-pointer type is passed in, an invalid type is returned.
   */
  CINDEX_LINKAGE CXType clang_Type_getClassType(CXType T);
  
  /**
   * \brief Return the size of a type in bytes as per C++[expr.sizeof] standard.
   *
   * If the type declaration is invalid, CXTypeLayoutError_Invalid is returned.
   * If the type declaration is an incomplete type, CXTypeLayoutError_Incomplete
   *   is returned.
   * If the type declaration is a dependent type, CXTypeLayoutError_Dependent is
   *   returned.
   */
  CINDEX_LINKAGE long long clang_Type_getSizeOf(CXType T);
  
  /**
   * \brief Return the offset of a field named S in a record of type T in bits
   *   as it would be returned by __offsetof__ as per C++11[18.2p4]
   *
   * If the cursor is not a record field declaration, CXTypeLayoutError_Invalid
   *   is returned.
   * If the field's type declaration is an incomplete type,
   *   CXTypeLayoutError_Incomplete is returned.
   * If the field's type declaration is a dependent type,
   *   CXTypeLayoutError_Dependent is returned.
   * If the field's name S is not found,
   *   CXTypeLayoutError_InvalidFieldName is returned.
   */
  CINDEX_LINKAGE long long clang_Type_getOffsetOf(CXType T, const char *S);
  
  /**
   * \brief Return the offset of the field represented by the Cursor.
   *
   * If the cursor is not a field declaration, -1 is returned.
   * If the cursor semantic parent is not a record field declaration,
   *   CXTypeLayoutError_Invalid is returned.
   * If the field's type declaration is an incomplete type,
   *   CXTypeLayoutError_Incomplete is returned.
   * If the field's type declaration is a dependent type,
   *   CXTypeLayoutError_Dependent is returned.
   * If the field's name S is not found,
   *   CXTypeLayoutError_InvalidFieldName is returned.
   */
  CINDEX_LINKAGE long long clang_Cursor_getOffsetOfField(CXCursor C);
  
  /**
   * \brief Determine whether the given cursor represents an anonymous record
   * declaration.
   */
  CINDEX_LINKAGE unsigned clang_Cursor_isAnonymous(CXCursor C);
  
  
  enum CXRefQualifierKind {
    /** \brief No ref-qualifier was provided. */
    CXRefQualifier_None = 0,
    /** \brief An lvalue ref-qualifier was provided (\c &). */
    CXRefQualifier_LValue,
    /** \brief An rvalue ref-qualifier was provided (\c &&). */
    CXRefQualifier_RValue
  };
  
  /**
   * \brief Returns the number of template arguments for given class template
   * specialization, or -1 if type \c T is not a class template specialization.
   *
   * Variadic argument packs count as only one argument, and can not be inspected
   * further.
   */
  CINDEX_LINKAGE int clang_Type_getNumTemplateArguments(CXType T);
  
  /**
   * \brief Returns the type template argument of a template class specialization
   * at given index.
   *
   * This function only returns template type arguments and does not handle
   * template template arguments or variadic packs.
   */
  CINDEX_LINKAGE CXType clang_Type_getTemplateArgumentAsType(CXType T, unsigned i);
  
  /**
   * \brief Retrieve the ref-qualifier kind of a function or method.
   *
   * The ref-qualifier is returned for C++ functions or methods. For other types
   * or non-C++ declarations, CXRefQualifier_None is returned.
   */
  CINDEX_LINKAGE enum CXRefQualifierKind clang_Type_getCXXRefQualifier(CXType T);
  
  /**
   * \brief Returns non-zero if the cursor specifies a Record member that is a
   *   bitfield.
   */
  CINDEX_LINKAGE unsigned clang_Cursor_isBitField(CXCursor C);
  
  /**
   * \brief Returns 1 if the base class specified by the cursor with kind
   *   CX_CXXBaseSpecifier is virtual.
   */
  CINDEX_LINKAGE unsigned clang_isVirtualBase(CXCursor);
      
  /**
   * \brief Represents the C++ access control level to a base class for a
   * cursor with kind CX_CXXBaseSpecifier.
   */
  enum CX_CXXAccessSpecifier {
    CX_CXXInvalidAccessSpecifier,
    CX_CXXPublic,
    CX_CXXProtected,
    CX_CXXPrivate
  };
  
  /**
   * \brief Returns the access control level for the referenced object.
   *
   * If the cursor refers to a C++ declaration, its access control level within its
   * parent scope is returned. Otherwise, if the cursor refers to a base specifier or
   * access specifier, the specifier itself is returned.
   */
  CINDEX_LINKAGE enum CX_CXXAccessSpecifier clang_getCXXAccessSpecifier(CXCursor);
  
  /**
   * \brief Represents the storage classes as declared in the source. CX_SC_Invalid
   * was added for the case that the passed cursor in not a declaration.
   */
  enum CX_StorageClass {
    CX_SC_Invalid,
    CX_SC_None,
    CX_SC_Extern,
    CX_SC_Static,
    CX_SC_PrivateExtern,
    CX_SC_OpenCLWorkGroupLocal,
    CX_SC_Auto,
    CX_SC_Register
  };
  
  /**
   * \brief Returns the storage class for a function or variable declaration.
   *
   * If the passed in Cursor is not a function or variable declaration,
   * CX_SC_Invalid is returned else the storage class.
   */
  CINDEX_LINKAGE enum CX_StorageClass clang_Cursor_getStorageClass(CXCursor);
  
  /**
   * \brief Determine the number of overloaded declarations referenced by a 
   * \c CXCursor_OverloadedDeclRef cursor.
   *
   * \param cursor The cursor whose overloaded declarations are being queried.
   *
   * \returns The number of overloaded declarations referenced by \c cursor. If it
   * is not a \c CXCursor_OverloadedDeclRef cursor, returns 0.
   */
  CINDEX_LINKAGE unsigned clang_getNumOverloadedDecls(CXCursor cursor);
  
  /**
   * \brief Retrieve a cursor for one of the overloaded declarations referenced
   * by a \c CXCursor_OverloadedDeclRef cursor.
   *
   * \param cursor The cursor whose overloaded declarations are being queried.
   *
   * \param index The zero-based index into the set of overloaded declarations in
   * the cursor.
   *
   * \returns A cursor representing the declaration referenced by the given 
   * \c cursor at the specified \c index. If the cursor does not have an 
   * associated set of overloaded declarations, or if the index is out of bounds,
   * returns \c clang_getNullCursor();
   */
  CINDEX_LINKAGE CXCursor clang_getOverloadedDecl(CXCursor cursor, 
                                                  unsigned index);
    
  /**
   * @}
   */
    
  /**
   * \defgroup CINDEX_ATTRIBUTES Information for attributes
   *
   * @{
   */
  
  
  /**
   * \brief For cursors representing an iboutletcollection attribute,
   *  this function returns the collection element type.
   *
   */
  CINDEX_LINKAGE CXType clang_getIBOutletCollectionType(CXCursor);
  
  /**
   * @}
   */
  
  /**
   * \defgroup CINDEX_CURSOR_TRAVERSAL Traversing the AST with cursors
   *
   * These routines provide the ability to traverse the abstract syntax tree
   * using cursors.
   *
   * @{
   */
  
  /**
   * \brief Describes how the traversal of the children of a particular
   * cursor should proceed after visiting a particular child cursor.
   *
   * A value of this enumeration type should be returned by each
   * \c CXCursorVisitor to indicate how clang_visitChildren() proceed.
   */
  enum CXChildVisitResult {
    /**
     * \brief Terminates the cursor traversal.
     */
    CXChildVisit_Break,
    /**
     * \brief Continues the cursor traversal with the next sibling of
     * the cursor just visited, without visiting its children.
     */
    CXChildVisit_Continue,
    /**
     * \brief Recursively traverse the children of this cursor, using
     * the same visitor and client data.
     */
    CXChildVisit_Recurse
  };
  
  /**
   * \brief Visitor invoked for each cursor found by a traversal.
   *
   * This visitor function will be invoked for each cursor found by
   * clang_visitCursorChildren(). Its first argument is the cursor being
   * visited, its second argument is the parent visitor for that cursor,
   * and its third argument is the client data provided to
   * clang_visitCursorChildren().
   *
   * The visitor should return one of the \c CXChildVisitResult values
   * to direct clang_visitCursorChildren().
   */
  typedef enum CXChildVisitResult (*CXCursorVisitor)(CXCursor cursor,
                                                     CXCursor parent,
                                                     CXClientData client_data);
  
  /**
   * \brief Visit the children of a particular cursor.
   *
   * This function visits all the direct children of the given cursor,
   * invoking the given \p visitor function with the cursors of each
   * visited child. The traversal may be recursive, if the visitor returns
   * \c CXChildVisit_Recurse. The traversal may also be ended prematurely, if
   * the visitor returns \c CXChildVisit_Break.
   *
   * \param parent the cursor whose child may be visited. All kinds of
   * cursors can be visited, including invalid cursors (which, by
   * definition, have no children).
   *
   * \param visitor the visitor function that will be invoked for each
   * child of \p parent.
   *
   * \param client_data pointer data supplied by the client, which will
   * be passed to the visitor each time it is invoked.
   *
   * \returns a non-zero value if the traversal was terminated
   * prematurely by the visitor returning \c CXChildVisit_Break.
   */
  CINDEX_LINKAGE unsigned clang_visitChildren(CXCursor parent,
                                              CXCursorVisitor visitor,
                                              CXClientData client_data);
  #ifdef __has_feature
  #  if __has_feature(blocks)
  /**
   * \brief Visitor invoked for each cursor found by a traversal.
   *
   * This visitor block will be invoked for each cursor found by
   * clang_visitChildrenWithBlock(). Its first argument is the cursor being
   * visited, its second argument is the parent visitor for that cursor.
   *
   * The visitor should return one of the \c CXChildVisitResult values
   * to direct clang_visitChildrenWithBlock().
   */
  typedef enum CXChildVisitResult 
       (^CXCursorVisitorBlock)(CXCursor cursor, CXCursor parent);
  
  /**
   * Visits the children of a cursor using the specified block.  Behaves
   * identically to clang_visitChildren() in all other respects.
   */
  unsigned clang_visitChildrenWithBlock(CXCursor parent,
                                        CXCursorVisitorBlock block);
  #  endif
  #endif
  
  /**
   * @}
   */
  
  /**
   * \defgroup CINDEX_CURSOR_XREF Cross-referencing in the AST
   *
   * These routines provide the ability to determine references within and
   * across translation units, by providing the names of the entities referenced
   * by cursors, follow reference cursors to the declarations they reference,
   * and associate declarations with their definitions.
   *
   * @{
   */
  
  /**
   * \brief Retrieve a Unified Symbol Resolution (USR) for the entity referenced
   * by the given cursor.
   *
   * A Unified Symbol Resolution (USR) is a string that identifies a particular
   * entity (function, class, variable, etc.) within a program. USRs can be
   * compared across translation units to determine, e.g., when references in
   * one translation refer to an entity defined in another translation unit.
   */
  CINDEX_LINKAGE CXString clang_getCursorUSR(CXCursor);
  
  /**
   * \brief Construct a USR for a specified Objective-C class.
   */
  CINDEX_LINKAGE CXString clang_constructUSR_ObjCClass(const char *class_name);
  
  /**
   * \brief Construct a USR for a specified Objective-C category.
   */
  CINDEX_LINKAGE CXString
    clang_constructUSR_ObjCCategory(const char *class_name,
                                   const char *category_name);
  
  /**
   * \brief Construct a USR for a specified Objective-C protocol.
   */
  CINDEX_LINKAGE CXString
    clang_constructUSR_ObjCProtocol(const char *protocol_name);
  
  
  /**
   * \brief Construct a USR for a specified Objective-C instance variable and
   *   the USR for its containing class.
   */
  CINDEX_LINKAGE CXString clang_constructUSR_ObjCIvar(const char *name,
                                                      CXString classUSR);
  
  /**
   * \brief Construct a USR for a specified Objective-C method and
   *   the USR for its containing class.
   */
  CINDEX_LINKAGE CXString clang_constructUSR_ObjCMethod(const char *name,
                                                        unsigned isInstanceMethod,
                                                        CXString classUSR);
  
  /**
   * \brief Construct a USR for a specified Objective-C property and the USR
   *  for its containing class.
   */
  CINDEX_LINKAGE CXString clang_constructUSR_ObjCProperty(const char *property,
                                                          CXString classUSR);
  
  /**
   * \brief Retrieve a name for the entity referenced by this cursor.
   */
  CINDEX_LINKAGE CXString clang_getCursorSpelling(CXCursor);
  
  /**
   * \brief Retrieve a range for a piece that forms the cursors spelling name.
   * Most of the times there is only one range for the complete spelling but for
   * Objective-C methods and Objective-C message expressions, there are multiple
   * pieces for each selector identifier.
   * 
   * \param pieceIndex the index of the spelling name piece. If this is greater
   * than the actual number of pieces, it will return a NULL (invalid) range.
   *  
   * \param options Reserved.
   */
  CINDEX_LINKAGE CXSourceRange clang_Cursor_getSpellingNameRange(CXCursor,
                                                            unsigned pieceIndex,
                                                            unsigned options);
  
  /**
   * \brief Retrieve the display name for the entity referenced by this cursor.
   *
   * The display name contains extra information that helps identify the cursor,
   * such as the parameters of a function or template or the arguments of a 
   * class template specialization.
   */
  CINDEX_LINKAGE CXString clang_getCursorDisplayName(CXCursor);
    
  /** \brief For a cursor that is a reference, retrieve a cursor representing the
   * entity that it references.
   *
   * Reference cursors refer to other entities in the AST. For example, an
   * Objective-C superclass reference cursor refers to an Objective-C class.
   * This function produces the cursor for the Objective-C class from the
   * cursor for the superclass reference. If the input cursor is a declaration or
   * definition, it returns that declaration or definition unchanged.
   * Otherwise, returns the NULL cursor.
   */
  CINDEX_LINKAGE CXCursor clang_getCursorReferenced(CXCursor);
  
  /**
   *  \brief For a cursor that is either a reference to or a declaration
   *  of some entity, retrieve a cursor that describes the definition of
   *  that entity.
   *
   *  Some entities can be declared multiple times within a translation
   *  unit, but only one of those declarations can also be a
   *  definition. For example, given:
   *
   *  \code
   *  int f(int, int);
   *  int g(int x, int y) { return f(x, y); }
   *  int f(int a, int b) { return a + b; }
   *  int f(int, int);
   *  \endcode
   *
   *  there are three declarations of the function "f", but only the
   *  second one is a definition. The clang_getCursorDefinition()
   *  function will take any cursor pointing to a declaration of "f"
   *  (the first or fourth lines of the example) or a cursor referenced
   *  that uses "f" (the call to "f' inside "g") and will return a
   *  declaration cursor pointing to the definition (the second "f"
   *  declaration).
   *
   *  If given a cursor for which there is no corresponding definition,
   *  e.g., because there is no definition of that entity within this
   *  translation unit, returns a NULL cursor.
   */
  CINDEX_LINKAGE CXCursor clang_getCursorDefinition(CXCursor);
  
  /**
   * \brief Determine whether the declaration pointed to by this cursor
   * is also a definition of that entity.
   */
  CINDEX_LINKAGE unsigned clang_isCursorDefinition(CXCursor);
  
  /**
   * \brief Retrieve the canonical cursor corresponding to the given cursor.
   *
   * In the C family of languages, many kinds of entities can be declared several
   * times within a single translation unit. For example, a structure type can
   * be forward-declared (possibly multiple times) and later defined:
   *
   * \code
   * struct X;
   * struct X;
   * struct X {
   *   int member;
   * };
   * \endcode
   *
   * The declarations and the definition of \c X are represented by three 
   * different cursors, all of which are declarations of the same underlying 
   * entity. One of these cursor is considered the "canonical" cursor, which
   * is effectively the representative for the underlying entity. One can 
   * determine if two cursors are declarations of the same underlying entity by
   * comparing their canonical cursors.
   *
   * \returns The canonical cursor for the entity referred to by the given cursor.
   */
  CINDEX_LINKAGE CXCursor clang_getCanonicalCursor(CXCursor);
  
  
  /**
   * \brief If the cursor points to a selector identifier in an Objective-C
   * method or message expression, this returns the selector index.
   *
   * After getting a cursor with #clang_getCursor, this can be called to
   * determine if the location points to a selector identifier.
   *
   * \returns The selector index if the cursor is an Objective-C method or message
   * expression and the cursor is pointing to a selector identifier, or -1
   * otherwise.
   */
  CINDEX_LINKAGE int clang_Cursor_getObjCSelectorIndex(CXCursor);
  
  /**
   * \brief Given a cursor pointing to a C++ method call or an Objective-C
   * message, returns non-zero if the method/message is "dynamic", meaning:
   * 
   * For a C++ method: the call is virtual.
   * For an Objective-C message: the receiver is an object instance, not 'super'
   * or a specific class.
   * 
   * If the method/message is "static" or the cursor does not point to a
   * method/message, it will return zero.
   */
  CINDEX_LINKAGE int clang_Cursor_isDynamicCall(CXCursor C);
  
  /**
   * \brief Given a cursor pointing to an Objective-C message, returns the CXType
   * of the receiver.
   */
  CINDEX_LINKAGE CXType clang_Cursor_getReceiverType(CXCursor C);
  
  /**
   * \brief Property attributes for a \c CXCursor_ObjCPropertyDecl.
   */
  typedef enum {
    CXObjCPropertyAttr_noattr    = 0x00,
    CXObjCPropertyAttr_readonly  = 0x01,
    CXObjCPropertyAttr_getter    = 0x02,
    CXObjCPropertyAttr_assign    = 0x04,
    CXObjCPropertyAttr_readwrite = 0x08,
    CXObjCPropertyAttr_retain    = 0x10,
    CXObjCPropertyAttr_copy      = 0x20,
    CXObjCPropertyAttr_nonatomic = 0x40,
    CXObjCPropertyAttr_setter    = 0x80,
    CXObjCPropertyAttr_atomic    = 0x100,
    CXObjCPropertyAttr_weak      = 0x200,
    CXObjCPropertyAttr_strong    = 0x400,
    CXObjCPropertyAttr_unsafe_unretained = 0x800
  } CXObjCPropertyAttrKind;
  
  /**
   * \brief Given a cursor that represents a property declaration, return the
   * associated property attributes. The bits are formed from
   * \c CXObjCPropertyAttrKind.
   *
   * \param reserved Reserved for future use, pass 0.
   */
  CINDEX_LINKAGE unsigned clang_Cursor_getObjCPropertyAttributes(CXCursor C,
                                                               unsigned reserved);
  
  /**
   * \brief 'Qualifiers' written next to the return and parameter types in
   * Objective-C method declarations.
   */
  typedef enum {
    CXObjCDeclQualifier_None = 0x0,
    CXObjCDeclQualifier_In = 0x1,
    CXObjCDeclQualifier_Inout = 0x2,
    CXObjCDeclQualifier_Out = 0x4,
    CXObjCDeclQualifier_Bycopy = 0x8,
    CXObjCDeclQualifier_Byref = 0x10,
    CXObjCDeclQualifier_Oneway = 0x20
  } CXObjCDeclQualifierKind;
  
  /**
   * \brief Given a cursor that represents an Objective-C method or parameter
   * declaration, return the associated Objective-C qualifiers for the return
   * type or the parameter respectively. The bits are formed from
   * CXObjCDeclQualifierKind.
   */
  CINDEX_LINKAGE unsigned clang_Cursor_getObjCDeclQualifiers(CXCursor C);
  
  /**
   * \brief Given a cursor that represents an Objective-C method or property
   * declaration, return non-zero if the declaration was affected by "@optional".
   * Returns zero if the cursor is not such a declaration or it is "@required".
   */
  CINDEX_LINKAGE unsigned clang_Cursor_isObjCOptional(CXCursor C);
  
  /**
   * \brief Returns non-zero if the given cursor is a variadic function or method.
   */
  CINDEX_LINKAGE unsigned clang_Cursor_isVariadic(CXCursor C);
  
  /**
   * \brief Given a cursor that represents a declaration, return the associated
   * comment's source range.  The range may include multiple consecutive comments
   * with whitespace in between.
   */
  CINDEX_LINKAGE CXSourceRange clang_Cursor_getCommentRange(CXCursor C);
  
  /**
   * \brief Given a cursor that represents a declaration, return the associated
   * comment text, including comment markers.
   */
  CINDEX_LINKAGE CXString clang_Cursor_getRawCommentText(CXCursor C);
  
  /**
   * \brief Given a cursor that represents a documentable entity (e.g.,
   * declaration), return the associated \\brief paragraph; otherwise return the
   * first paragraph.
   */
  CINDEX_LINKAGE CXString clang_Cursor_getBriefCommentText(CXCursor C);
  
  /**
   * @}
   */
  
  /** \defgroup CINDEX_MANGLE Name Mangling API Functions
   *
   * @{
   */
  
  /**
   * \brief Retrieve the CXString representing the mangled name of the cursor.
   */
  CINDEX_LINKAGE CXString clang_Cursor_getMangling(CXCursor);
  
  /**
   * \brief Retrieve the CXStrings representing the mangled symbols of the C++
   * constructor or destructor at the cursor.
   */
  CINDEX_LINKAGE CXStringSet *clang_Cursor_getCXXManglings(CXCursor);
  
  /**
   * @}
   */
  
  /**
   * \defgroup CINDEX_MODULE Module introspection
   *
   * The functions in this group provide access to information about modules.
   *
   * @{
   */
  
  typedef void *CXModule;
  
  /**
   * \brief Given a CXCursor_ModuleImportDecl cursor, return the associated module.
   */
  CINDEX_LINKAGE CXModule clang_Cursor_getModule(CXCursor C);
  
  /**
   * \brief Given a CXFile header file, return the module that contains it, if one
   * exists.
   */
  CINDEX_LINKAGE CXModule clang_getModuleForFile(CXTranslationUnit, CXFile);
  
  /**
   * \param Module a module object.
   *
   * \returns the module file where the provided module object came from.
   */
  CINDEX_LINKAGE CXFile clang_Module_getASTFile(CXModule Module);
  
  /**
   * \param Module a module object.
   *
   * \returns the parent of a sub-module or NULL if the given module is top-level,
   * e.g. for 'std.vector' it will return the 'std' module.
   */
  CINDEX_LINKAGE CXModule clang_Module_getParent(CXModule Module);
  
  /**
   * \param Module a module object.
   *
   * \returns the name of the module, e.g. for the 'std.vector' sub-module it
   * will return "vector".
   */
  CINDEX_LINKAGE CXString clang_Module_getName(CXModule Module);
  
  /**
   * \param Module a module object.
   *
   * \returns the full name of the module, e.g. "std.vector".
   */
  CINDEX_LINKAGE CXString clang_Module_getFullName(CXModule Module);
  
  /**
   * \param Module a module object.
   *
   * \returns non-zero if the module is a system one.
   */
  CINDEX_LINKAGE int clang_Module_isSystem(CXModule Module);
  
  /**
   * \param Module a module object.
   *
   * \returns the number of top level headers associated with this module.
   */
  CINDEX_LINKAGE unsigned clang_Module_getNumTopLevelHeaders(CXTranslationUnit,
                                                             CXModule Module);
  
  /**
   * \param Module a module object.
   *
   * \param Index top level header index (zero-based).
   *
   * \returns the specified top level header associated with the module.
   */
  CINDEX_LINKAGE
  CXFile clang_Module_getTopLevelHeader(CXTranslationUnit,
                                        CXModule Module, unsigned Index);
  
  /**
   * @}
   */
  
  /**
   * \defgroup CINDEX_CPP C++ AST introspection
   *
   * The routines in this group provide access information in the ASTs specific
   * to C++ language features.
   *
   * @{
   */
  
  /**
   * \brief Determine if a C++ field is declared 'mutable'.
   */
  CINDEX_LINKAGE unsigned clang_CXXField_isMutable(CXCursor C);
  
  /**
   * \brief Determine if a C++ member function or member function template is
   * pure virtual.
   */
  CINDEX_LINKAGE unsigned clang_CXXMethod_isPureVirtual(CXCursor C);
  
  /**
   * \brief Determine if a C++ member function or member function template is 
   * declared 'static'.
   */
  CINDEX_LINKAGE unsigned clang_CXXMethod_isStatic(CXCursor C);
  
  /**
   * \brief Determine if a C++ member function or member function template is
   * explicitly declared 'virtual' or if it overrides a virtual method from
   * one of the base classes.
   */
  CINDEX_LINKAGE unsigned clang_CXXMethod_isVirtual(CXCursor C);
  
  /**
   * \brief Determine if a C++ member function or member function template is
   * declared 'const'.
   */
  CINDEX_LINKAGE unsigned clang_CXXMethod_isConst(CXCursor C);
  
  /**
   * \brief Given a cursor that represents a template, determine
   * the cursor kind of the specializations would be generated by instantiating
   * the template.
   *
   * This routine can be used to determine what flavor of function template,
   * class template, or class template partial specialization is stored in the
   * cursor. For example, it can describe whether a class template cursor is
   * declared with "struct", "class" or "union".
   *
   * \param C The cursor to query. This cursor should represent a template
   * declaration.
   *
   * \returns The cursor kind of the specializations that would be generated
   * by instantiating the template \p C. If \p C is not a template, returns
   * \c CXCursor_NoDeclFound.
   */
  CINDEX_LINKAGE enum CXCursorKind clang_getTemplateCursorKind(CXCursor C);
    
  /**
   * \brief Given a cursor that may represent a specialization or instantiation
   * of a template, retrieve the cursor that represents the template that it
   * specializes or from which it was instantiated.
   *
   * This routine determines the template involved both for explicit 
   * specializations of templates and for implicit instantiations of the template,
   * both of which are referred to as "specializations". For a class template
   * specialization (e.g., \c std::vector<bool>), this routine will return 
   * either the primary template (\c std::vector) or, if the specialization was
   * instantiated from a class template partial specialization, the class template
   * partial specialization. For a class template partial specialization and a
   * function template specialization (including instantiations), this
   * this routine will return the specialized template.
   *
   * For members of a class template (e.g., member functions, member classes, or
   * static data members), returns the specialized or instantiated member. 
   * Although not strictly "templates" in the C++ language, members of class
   * templates have the same notions of specializations and instantiations that
   * templates do, so this routine treats them similarly.
   *
   * \param C A cursor that may be a specialization of a template or a member
   * of a template.
   *
   * \returns If the given cursor is a specialization or instantiation of a 
   * template or a member thereof, the template or member that it specializes or
   * from which it was instantiated. Otherwise, returns a NULL cursor.
   */
  CINDEX_LINKAGE CXCursor clang_getSpecializedCursorTemplate(CXCursor C);
  
  /**
   * \brief Given a cursor that references something else, return the source range
   * covering that reference.
   *
   * \param C A cursor pointing to a member reference, a declaration reference, or
   * an operator call.
   * \param NameFlags A bitset with three independent flags: 
   * CXNameRange_WantQualifier, CXNameRange_WantTemplateArgs, and
   * CXNameRange_WantSinglePiece.
   * \param PieceIndex For contiguous names or when passing the flag 
   * CXNameRange_WantSinglePiece, only one piece with index 0 is 
   * available. When the CXNameRange_WantSinglePiece flag is not passed for a
   * non-contiguous names, this index can be used to retrieve the individual
   * pieces of the name. See also CXNameRange_WantSinglePiece.
   *
   * \returns The piece of the name pointed to by the given cursor. If there is no
   * name, or if the PieceIndex is out-of-range, a null-cursor will be returned.
   */
  CINDEX_LINKAGE CXSourceRange clang_getCursorReferenceNameRange(CXCursor C,
                                                  unsigned NameFlags, 
                                                  unsigned PieceIndex);
  
  enum CXNameRefFlags {
    /**
     * \brief Include the nested-name-specifier, e.g. Foo:: in x.Foo::y, in the
     * range.
     */
    CXNameRange_WantQualifier = 0x1,
    
    /**
     * \brief Include the explicit template arguments, e.g. \<int> in x.f<int>,
     * in the range.
     */
    CXNameRange_WantTemplateArgs = 0x2,
  
    /**
     * \brief If the name is non-contiguous, return the full spanning range.
     *
     * Non-contiguous names occur in Objective-C when a selector with two or more
     * parameters is used, or in C++ when using an operator:
     * \code
     * [object doSomething:here withValue:there]; // Objective-C
     * return some_vector[1]; // C++
     * \endcode
     */
    CXNameRange_WantSinglePiece = 0x4
  };
    
  /**
   * @}
   */
  
  /**
   * \defgroup CINDEX_LEX Token extraction and manipulation
   *
   * The routines in this group provide access to the tokens within a
   * translation unit, along with a semantic mapping of those tokens to
   * their corresponding cursors.
   *
   * @{
   */
  
  /**
   * \brief Describes a kind of token.
   */
  typedef enum CXTokenKind {
    /**
     * \brief A token that contains some kind of punctuation.
     */
    CXToken_Punctuation,
  
    /**
     * \brief A language keyword.
     */
    CXToken_Keyword,
  
    /**
     * \brief An identifier (that is not a keyword).
     */
    CXToken_Identifier,
  
    /**
     * \brief A numeric, string, or character literal.
     */
    CXToken_Literal,
  
    /**
     * \brief A comment.
     */
    CXToken_Comment
  } CXTokenKind;
  
  /**
   * \brief Describes a single preprocessing token.
   */
  typedef struct {
    unsigned int_data[4];
    void *ptr_data;
  } CXToken;
  
  /**
   * \brief Determine the kind of the given token.
   */
  CINDEX_LINKAGE CXTokenKind clang_getTokenKind(CXToken);
  
  /**
   * \brief Determine the spelling of the given token.
   *
   * The spelling of a token is the textual representation of that token, e.g.,
   * the text of an identifier or keyword.
   */
  CINDEX_LINKAGE CXString clang_getTokenSpelling(CXTranslationUnit, CXToken);
  
  /**
   * \brief Retrieve the source location of the given token.
   */
  CINDEX_LINKAGE CXSourceLocation clang_getTokenLocation(CXTranslationUnit,
                                                         CXToken);
  
  /**
   * \brief Retrieve a source range that covers the given token.
   */
  CINDEX_LINKAGE CXSourceRange clang_getTokenExtent(CXTranslationUnit, CXToken);
  
  /**
   * \brief Tokenize the source code described by the given range into raw
   * lexical tokens.
   *
   * \param TU the translation unit whose text is being tokenized.
   *
   * \param Range the source range in which text should be tokenized. All of the
   * tokens produced by tokenization will fall within this source range,
   *
   * \param Tokens this pointer will be set to point to the array of tokens
   * that occur within the given source range. The returned pointer must be
   * freed with clang_disposeTokens() before the translation unit is destroyed.
   *
   * \param NumTokens will be set to the number of tokens in the \c *Tokens
   * array.
   *
   */
  CINDEX_LINKAGE void clang_tokenize(CXTranslationUnit TU, CXSourceRange Range,
                                     CXToken **Tokens, unsigned *NumTokens);
  
  /**
   * \brief Annotate the given set of tokens by providing cursors for each token
   * that can be mapped to a specific entity within the abstract syntax tree.
   *
   * This token-annotation routine is equivalent to invoking
   * clang_getCursor() for the source locations of each of the
   * tokens. The cursors provided are filtered, so that only those
   * cursors that have a direct correspondence to the token are
   * accepted. For example, given a function call \c f(x),
   * clang_getCursor() would provide the following cursors:
   *
   *   * when the cursor is over the 'f', a DeclRefExpr cursor referring to 'f'.
   *   * when the cursor is over the '(' or the ')', a CallExpr referring to 'f'.
   *   * when the cursor is over the 'x', a DeclRefExpr cursor referring to 'x'.
   *
   * Only the first and last of these cursors will occur within the
   * annotate, since the tokens "f" and "x' directly refer to a function
   * and a variable, respectively, but the parentheses are just a small
   * part of the full syntax of the function call expression, which is
   * not provided as an annotation.
   *
   * \param TU the translation unit that owns the given tokens.
   *
   * \param Tokens the set of tokens to annotate.
   *
   * \param NumTokens the number of tokens in \p Tokens.
   *
   * \param Cursors an array of \p NumTokens cursors, whose contents will be
   * replaced with the cursors corresponding to each token.
   */
  CINDEX_LINKAGE void clang_annotateTokens(CXTranslationUnit TU,
                                           CXToken *Tokens, unsigned NumTokens,
                                           CXCursor *Cursors);
  
  /**
   * \brief Free the given set of tokens.
   */
  CINDEX_LINKAGE void clang_disposeTokens(CXTranslationUnit TU,
                                          CXToken *Tokens, unsigned NumTokens);
  
  /**
   * @}
   */
  
  /**
   * \defgroup CINDEX_DEBUG Debugging facilities
   *
   * These routines are used for testing and debugging, only, and should not
   * be relied upon.
   *
   * @{
   */
  
  /* for debug/testing */
  CINDEX_LINKAGE CXString clang_getCursorKindSpelling(enum CXCursorKind Kind);
  CINDEX_LINKAGE void clang_getDefinitionSpellingAndExtent(CXCursor,
                                            const char **startBuf,
                                            const char **endBuf,
                                            unsigned *startLine,
                                            unsigned *startColumn,
                                            unsigned *endLine,
                                            unsigned *endColumn);
  CINDEX_LINKAGE void clang_enableStackTraces(void);
  CINDEX_LINKAGE void clang_executeOnThread(void (*fn)(void*), void *user_data,
                                            unsigned stack_size);
  
  /**
   * @}
   */
  
  /**
   * \defgroup CINDEX_CODE_COMPLET Code completion
   *
   * Code completion involves taking an (incomplete) source file, along with
   * knowledge of where the user is actively editing that file, and suggesting
   * syntactically- and semantically-valid constructs that the user might want to
   * use at that particular point in the source code. These data structures and
   * routines provide support for code completion.
   *
   * @{
   */
  
  /**
   * \brief A semantic string that describes a code-completion result.
   *
   * A semantic string that describes the formatting of a code-completion
   * result as a single "template" of text that should be inserted into the
   * source buffer when a particular code-completion result is selected.
   * Each semantic string is made up of some number of "chunks", each of which
   * contains some text along with a description of what that text means, e.g.,
   * the name of the entity being referenced, whether the text chunk is part of
   * the template, or whether it is a "placeholder" that the user should replace
   * with actual code,of a specific kind. See \c CXCompletionChunkKind for a
   * description of the different kinds of chunks.
   */
  typedef void *CXCompletionString;
  
  /**
   * \brief A single result of code completion.
   */
  typedef struct {
    /**
     * \brief The kind of entity that this completion refers to.
     *
     * The cursor kind will be a macro, keyword, or a declaration (one of the
     * *Decl cursor kinds), describing the entity that the completion is
     * referring to.
     *
     * \todo In the future, we would like to provide a full cursor, to allow
     * the client to extract additional information from declaration.
     */
    enum CXCursorKind CursorKind;
  
    /**
     * \brief The code-completion string that describes how to insert this
     * code-completion result into the editing buffer.
     */
    CXCompletionString CompletionString;
  } CXCompletionResult;
  
  /**
   * \brief Describes a single piece of text within a code-completion string.
   *
   * Each "chunk" within a code-completion string (\c CXCompletionString) is
   * either a piece of text with a specific "kind" that describes how that text
   * should be interpreted by the client or is another completion string.
   */
  enum CXCompletionChunkKind {
    /**
     * \brief A code-completion string that describes "optional" text that
     * could be a part of the template (but is not required).
     *
     * The Optional chunk is the only kind of chunk that has a code-completion
     * string for its representation, which is accessible via
     * \c clang_getCompletionChunkCompletionString(). The code-completion string
     * describes an additional part of the template that is completely optional.
     * For example, optional chunks can be used to describe the placeholders for
     * arguments that match up with defaulted function parameters, e.g. given:
     *
     * \code
     * void f(int x, float y = 3.14, double z = 2.71828);
     * \endcode
     *
     * The code-completion string for this function would contain:
     *   - a TypedText chunk for "f".
     *   - a LeftParen chunk for "(".
     *   - a Placeholder chunk for "int x"
     *   - an Optional chunk containing the remaining defaulted arguments, e.g.,
     *       - a Comma chunk for ","
     *       - a Placeholder chunk for "float y"
     *       - an Optional chunk containing the last defaulted argument:
     *           - a Comma chunk for ","
     *           - a Placeholder chunk for "double z"
     *   - a RightParen chunk for ")"
     *
     * There are many ways to handle Optional chunks. Two simple approaches are:
     *   - Completely ignore optional chunks, in which case the template for the
     *     function "f" would only include the first parameter ("int x").
     *   - Fully expand all optional chunks, in which case the template for the
     *     function "f" would have all of the parameters.
     */
    CXCompletionChunk_Optional,
    /**
     * \brief Text that a user would be expected to type to get this
     * code-completion result.
     *
     * There will be exactly one "typed text" chunk in a semantic string, which
     * will typically provide the spelling of a keyword or the name of a
     * declaration that could be used at the current code point. Clients are
     * expected to filter the code-completion results based on the text in this
     * chunk.
     */
    CXCompletionChunk_TypedText,
    /**
     * \brief Text that should be inserted as part of a code-completion result.
     *
     * A "text" chunk represents text that is part of the template to be
     * inserted into user code should this particular code-completion result
     * be selected.
     */
    CXCompletionChunk_Text,
    /**
     * \brief Placeholder text that should be replaced by the user.
     *
     * A "placeholder" chunk marks a place where the user should insert text
     * into the code-completion template. For example, placeholders might mark
     * the function parameters for a function declaration, to indicate that the
     * user should provide arguments for each of those parameters. The actual
     * text in a placeholder is a suggestion for the text to display before
     * the user replaces the placeholder with real code.
     */
    CXCompletionChunk_Placeholder,
    /**
     * \brief Informative text that should be displayed but never inserted as
     * part of the template.
     *
     * An "informative" chunk contains annotations that can be displayed to
     * help the user decide whether a particular code-completion result is the
     * right option, but which is not part of the actual template to be inserted
     * by code completion.
     */
    CXCompletionChunk_Informative,
    /**
     * \brief Text that describes the current parameter when code-completion is
     * referring to function call, message send, or template specialization.
     *
     * A "current parameter" chunk occurs when code-completion is providing
     * information about a parameter corresponding to the argument at the
     * code-completion point. For example, given a function
     *
     * \code
     * int add(int x, int y);
     * \endcode
     *
     * and the source code \c add(, where the code-completion point is after the
     * "(", the code-completion string will contain a "current parameter" chunk
     * for "int x", indicating that the current argument will initialize that
     * parameter. After typing further, to \c add(17, (where the code-completion
     * point is after the ","), the code-completion string will contain a
     * "current paremeter" chunk to "int y".
     */
    CXCompletionChunk_CurrentParameter,
    /**
     * \brief A left parenthesis ('('), used to initiate a function call or
     * signal the beginning of a function parameter list.
     */
    CXCompletionChunk_LeftParen,
    /**
     * \brief A right parenthesis (')'), used to finish a function call or
     * signal the end of a function parameter list.
     */
    CXCompletionChunk_RightParen,
    /**
     * \brief A left bracket ('[').
     */
    CXCompletionChunk_LeftBracket,
    /**
     * \brief A right bracket (']').
     */
    CXCompletionChunk_RightBracket,
    /**
     * \brief A left brace ('{').
     */
    CXCompletionChunk_LeftBrace,
    /**
     * \brief A right brace ('}').
     */
    CXCompletionChunk_RightBrace,
    /**
     * \brief A left angle bracket ('<').
     */
    CXCompletionChunk_LeftAngle,
    /**
     * \brief A right angle bracket ('>').
     */
    CXCompletionChunk_RightAngle,
    /**
     * \brief A comma separator (',').
     */
    CXCompletionChunk_Comma,
    /**
     * \brief Text that specifies the result type of a given result.
     *
     * This special kind of informative chunk is not meant to be inserted into
     * the text buffer. Rather, it is meant to illustrate the type that an
     * expression using the given completion string would have.
     */
    CXCompletionChunk_ResultType,
    /**
     * \brief A colon (':').
     */
    CXCompletionChunk_Colon,
    /**
     * \brief A semicolon (';').
     */
    CXCompletionChunk_SemiColon,
    /**
     * \brief An '=' sign.
     */
    CXCompletionChunk_Equal,
    /**
     * Horizontal space (' ').
     */
    CXCompletionChunk_HorizontalSpace,
    /**
     * Vertical space ('\n'), after which it is generally a good idea to
     * perform indentation.
     */
    CXCompletionChunk_VerticalSpace
  };
  
  /**
   * \brief Determine the kind of a particular chunk within a completion string.
   *
   * \param completion_string the completion string to query.
   *
   * \param chunk_number the 0-based index of the chunk in the completion string.
   *
   * \returns the kind of the chunk at the index \c chunk_number.
   */
  CINDEX_LINKAGE enum CXCompletionChunkKind
  clang_getCompletionChunkKind(CXCompletionString completion_string,
                               unsigned chunk_number);
  
  /**
   * \brief Retrieve the text associated with a particular chunk within a
   * completion string.
   *
   * \param completion_string the completion string to query.
   *
   * \param chunk_number the 0-based index of the chunk in the completion string.
   *
   * \returns the text associated with the chunk at index \c chunk_number.
   */
  CINDEX_LINKAGE CXString
  clang_getCompletionChunkText(CXCompletionString completion_string,
                               unsigned chunk_number);
  
  /**
   * \brief Retrieve the completion string associated with a particular chunk
   * within a completion string.
   *
   * \param completion_string the completion string to query.
   *
   * \param chunk_number the 0-based index of the chunk in the completion string.
   *
   * \returns the completion string associated with the chunk at index
   * \c chunk_number.
   */
  CINDEX_LINKAGE CXCompletionString
  clang_getCompletionChunkCompletionString(CXCompletionString completion_string,
                                           unsigned chunk_number);
  
  /**
   * \brief Retrieve the number of chunks in the given code-completion string.
   */
  CINDEX_LINKAGE unsigned
  clang_getNumCompletionChunks(CXCompletionString completion_string);
  
  /**
   * \brief Determine the priority of this code completion.
   *
   * The priority of a code completion indicates how likely it is that this 
   * particular completion is the completion that the user will select. The
   * priority is selected by various internal heuristics.
   *
   * \param completion_string The completion string to query.
   *
   * \returns The priority of this completion string. Smaller values indicate
   * higher-priority (more likely) completions.
   */
  CINDEX_LINKAGE unsigned
  clang_getCompletionPriority(CXCompletionString completion_string);
    
  /**
   * \brief Determine the availability of the entity that this code-completion
   * string refers to.
   *
   * \param completion_string The completion string to query.
   *
   * \returns The availability of the completion string.
   */
  CINDEX_LINKAGE enum CXAvailabilityKind 
  clang_getCompletionAvailability(CXCompletionString completion_string);
  
  /**
   * \brief Retrieve the number of annotations associated with the given
   * completion string.
   *
   * \param completion_string the completion string to query.
   *
   * \returns the number of annotations associated with the given completion
   * string.
   */
  CINDEX_LINKAGE unsigned
  clang_getCompletionNumAnnotations(CXCompletionString completion_string);
  
  /**
   * \brief Retrieve the annotation associated with the given completion string.
   *
   * \param completion_string the completion string to query.
   *
   * \param annotation_number the 0-based index of the annotation of the
   * completion string.
   *
   * \returns annotation string associated with the completion at index
   * \c annotation_number, or a NULL string if that annotation is not available.
   */
  CINDEX_LINKAGE CXString
  clang_getCompletionAnnotation(CXCompletionString completion_string,
                                unsigned annotation_number);
  
  /**
   * \brief Retrieve the parent context of the given completion string.
   *
   * The parent context of a completion string is the semantic parent of 
   * the declaration (if any) that the code completion represents. For example,
   * a code completion for an Objective-C method would have the method's class
   * or protocol as its context.
   *
   * \param completion_string The code completion string whose parent is
   * being queried.
   *
   * \param kind DEPRECATED: always set to CXCursor_NotImplemented if non-NULL.
   *
   * \returns The name of the completion parent, e.g., "NSObject" if
   * the completion string represents a method in the NSObject class.
   */
  CINDEX_LINKAGE CXString
  clang_getCompletionParent(CXCompletionString completion_string,
                            enum CXCursorKind *kind);
  
  /**
   * \brief Retrieve the brief documentation comment attached to the declaration
   * that corresponds to the given completion string.
   */
  CINDEX_LINKAGE CXString
  clang_getCompletionBriefComment(CXCompletionString completion_string);
  
  /**
   * \brief Retrieve a completion string for an arbitrary declaration or macro
   * definition cursor.
   *
   * \param cursor The cursor to query.
   *
   * \returns A non-context-sensitive completion string for declaration and macro
   * definition cursors, or NULL for other kinds of cursors.
   */
  CINDEX_LINKAGE CXCompletionString
  clang_getCursorCompletionString(CXCursor cursor);
    
  /**
   * \brief Contains the results of code-completion.
   *
   * This data structure contains the results of code completion, as
   * produced by \c clang_codeCompleteAt(). Its contents must be freed by
   * \c clang_disposeCodeCompleteResults.
   */
  typedef struct {
    /**
     * \brief The code-completion results.
     */
    CXCompletionResult *Results;
  
    /**
     * \brief The number of code-completion results stored in the
     * \c Results array.
     */
    unsigned NumResults;
  } CXCodeCompleteResults;
  
  /**
   * \brief Flags that can be passed to \c clang_codeCompleteAt() to
   * modify its behavior.
   *
   * The enumerators in this enumeration can be bitwise-OR'd together to
   * provide multiple options to \c clang_codeCompleteAt().
   */
  enum CXCodeComplete_Flags {
    /**
     * \brief Whether to include macros within the set of code
     * completions returned.
     */
    CXCodeComplete_IncludeMacros = 0x01,
  
    /**
     * \brief Whether to include code patterns for language constructs
     * within the set of code completions, e.g., for loops.
     */
    CXCodeComplete_IncludeCodePatterns = 0x02,
  
    /**
     * \brief Whether to include brief documentation within the set of code
     * completions returned.
     */
    CXCodeComplete_IncludeBriefComments = 0x04
  };
  
  /**
   * \brief Bits that represent the context under which completion is occurring.
   *
   * The enumerators in this enumeration may be bitwise-OR'd together if multiple
   * contexts are occurring simultaneously.
   */
  enum CXCompletionContext {
    /**
     * \brief The context for completions is unexposed, as only Clang results
     * should be included. (This is equivalent to having no context bits set.)
     */
    CXCompletionContext_Unexposed = 0,
    
    /**
     * \brief Completions for any possible type should be included in the results.
     */
    CXCompletionContext_AnyType = 1 << 0,
    
    /**
     * \brief Completions for any possible value (variables, function calls, etc.)
     * should be included in the results.
     */
    CXCompletionContext_AnyValue = 1 << 1,
    /**
     * \brief Completions for values that resolve to an Objective-C object should
     * be included in the results.
     */
    CXCompletionContext_ObjCObjectValue = 1 << 2,
    /**
     * \brief Completions for values that resolve to an Objective-C selector
     * should be included in the results.
     */
    CXCompletionContext_ObjCSelectorValue = 1 << 3,
    /**
     * \brief Completions for values that resolve to a C++ class type should be
     * included in the results.
     */
    CXCompletionContext_CXXClassTypeValue = 1 << 4,
    
    /**
     * \brief Completions for fields of the member being accessed using the dot
     * operator should be included in the results.
     */
    CXCompletionContext_DotMemberAccess = 1 << 5,
    /**
     * \brief Completions for fields of the member being accessed using the arrow
     * operator should be included in the results.
     */
    CXCompletionContext_ArrowMemberAccess = 1 << 6,
    /**
     * \brief Completions for properties of the Objective-C object being accessed
     * using the dot operator should be included in the results.
     */
    CXCompletionContext_ObjCPropertyAccess = 1 << 7,
    
    /**
     * \brief Completions for enum tags should be included in the results.
     */
    CXCompletionContext_EnumTag = 1 << 8,
    /**
     * \brief Completions for union tags should be included in the results.
     */
    CXCompletionContext_UnionTag = 1 << 9,
    /**
     * \brief Completions for struct tags should be included in the results.
     */
    CXCompletionContext_StructTag = 1 << 10,
    
    /**
     * \brief Completions for C++ class names should be included in the results.
     */
    CXCompletionContext_ClassTag = 1 << 11,
    /**
     * \brief Completions for C++ namespaces and namespace aliases should be
     * included in the results.
     */
    CXCompletionContext_Namespace = 1 << 12,
    /**
     * \brief Completions for C++ nested name specifiers should be included in
     * the results.
     */
    CXCompletionContext_NestedNameSpecifier = 1 << 13,
    
    /**
     * \brief Completions for Objective-C interfaces (classes) should be included
     * in the results.
     */
    CXCompletionContext_ObjCInterface = 1 << 14,
    /**
     * \brief Completions for Objective-C protocols should be included in
     * the results.
     */
    CXCompletionContext_ObjCProtocol = 1 << 15,
    /**
     * \brief Completions for Objective-C categories should be included in
     * the results.
     */
    CXCompletionContext_ObjCCategory = 1 << 16,
    /**
     * \brief Completions for Objective-C instance messages should be included
     * in the results.
     */
    CXCompletionContext_ObjCInstanceMessage = 1 << 17,
    /**
     * \brief Completions for Objective-C class messages should be included in
     * the results.
     */
    CXCompletionContext_ObjCClassMessage = 1 << 18,
    /**
     * \brief Completions for Objective-C selector names should be included in
     * the results.
     */
    CXCompletionContext_ObjCSelectorName = 1 << 19,
    
    /**
     * \brief Completions for preprocessor macro names should be included in
     * the results.
     */
    CXCompletionContext_MacroName = 1 << 20,
    
    /**
     * \brief Natural language completions should be included in the results.
     */
    CXCompletionContext_NaturalLanguage = 1 << 21,
    
    /**
     * \brief The current context is unknown, so set all contexts.
     */
    CXCompletionContext_Unknown = ((1 << 22) - 1)
  };
    
  /**
   * \brief Returns a default set of code-completion options that can be
   * passed to\c clang_codeCompleteAt(). 
   */
  CINDEX_LINKAGE unsigned clang_defaultCodeCompleteOptions(void);
  
  /**
   * \brief Perform code completion at a given location in a translation unit.
   *
   * This function performs code completion at a particular file, line, and
   * column within source code, providing results that suggest potential
   * code snippets based on the context of the completion. The basic model
   * for code completion is that Clang will parse a complete source file,
   * performing syntax checking up to the location where code-completion has
   * been requested. At that point, a special code-completion token is passed
   * to the parser, which recognizes this token and determines, based on the
   * current location in the C/Objective-C/C++ grammar and the state of
   * semantic analysis, what completions to provide. These completions are
   * returned via a new \c CXCodeCompleteResults structure.
   *
   * Code completion itself is meant to be triggered by the client when the
   * user types punctuation characters or whitespace, at which point the
   * code-completion location will coincide with the cursor. For example, if \c p
   * is a pointer, code-completion might be triggered after the "-" and then
   * after the ">" in \c p->. When the code-completion location is afer the ">",
   * the completion results will provide, e.g., the members of the struct that
   * "p" points to. The client is responsible for placing the cursor at the
   * beginning of the token currently being typed, then filtering the results
   * based on the contents of the token. For example, when code-completing for
   * the expression \c p->get, the client should provide the location just after
   * the ">" (e.g., pointing at the "g") to this code-completion hook. Then, the
   * client can filter the results based on the current token text ("get"), only
   * showing those results that start with "get". The intent of this interface
   * is to separate the relatively high-latency acquisition of code-completion
   * results from the filtering of results on a per-character basis, which must
   * have a lower latency.
   *
   * \param TU The translation unit in which code-completion should
   * occur. The source files for this translation unit need not be
   * completely up-to-date (and the contents of those source files may
   * be overridden via \p unsaved_files). Cursors referring into the
   * translation unit may be invalidated by this invocation.
   *
   * \param complete_filename The name of the source file where code
   * completion should be performed. This filename may be any file
   * included in the translation unit.
   *
   * \param complete_line The line at which code-completion should occur.
   *
   * \param complete_column The column at which code-completion should occur.
   * Note that the column should point just after the syntactic construct that
   * initiated code completion, and not in the middle of a lexical token.
   *
   * \param unsaved_files the Tiles that have not yet been saved to disk
   * but may be required for parsing or code completion, including the
   * contents of those files.  The contents and name of these files (as
   * specified by CXUnsavedFile) are copied when necessary, so the
   * client only needs to guarantee their validity until the call to
   * this function returns.
   *
   * \param num_unsaved_files The number of unsaved file entries in \p
   * unsaved_files.
   *
   * \param options Extra options that control the behavior of code
   * completion, expressed as a bitwise OR of the enumerators of the
   * CXCodeComplete_Flags enumeration. The 
   * \c clang_defaultCodeCompleteOptions() function returns a default set
   * of code-completion options.
   *
   * \returns If successful, a new \c CXCodeCompleteResults structure
   * containing code-completion results, which should eventually be
   * freed with \c clang_disposeCodeCompleteResults(). If code
   * completion fails, returns NULL.
   */
  CINDEX_LINKAGE
  CXCodeCompleteResults *clang_codeCompleteAt(CXTranslationUnit TU,
                                              const char *complete_filename,
                                              unsigned complete_line,
                                              unsigned complete_column,
                                              struct CXUnsavedFile *unsaved_files,
                                              unsigned num_unsaved_files,
                                              unsigned options);
  
  /**
   * \brief Sort the code-completion results in case-insensitive alphabetical 
   * order.
   *
   * \param Results The set of results to sort.
   * \param NumResults The number of results in \p Results.
   */
  CINDEX_LINKAGE
  void clang_sortCodeCompletionResults(CXCompletionResult *Results,
                                       unsigned NumResults);
    
  /**
   * \brief Free the given set of code-completion results.
   */
  CINDEX_LINKAGE
  void clang_disposeCodeCompleteResults(CXCodeCompleteResults *Results);
    
  /**
   * \brief Determine the number of diagnostics produced prior to the
   * location where code completion was performed.
   */
  CINDEX_LINKAGE
  unsigned clang_codeCompleteGetNumDiagnostics(CXCodeCompleteResults *Results);
  
  /**
   * \brief Retrieve a diagnostic associated with the given code completion.
   *
   * \param Results the code completion results to query.
   * \param Index the zero-based diagnostic number to retrieve.
   *
   * \returns the requested diagnostic. This diagnostic must be freed
   * via a call to \c clang_disposeDiagnostic().
   */
  CINDEX_LINKAGE
  CXDiagnostic clang_codeCompleteGetDiagnostic(CXCodeCompleteResults *Results,
                                               unsigned Index);
  
  /**
   * \brief Determines what completions are appropriate for the context
   * the given code completion.
   * 
   * \param Results the code completion results to query
   *
   * \returns the kinds of completions that are appropriate for use
   * along with the given code completion results.
   */
  CINDEX_LINKAGE
  unsigned long long clang_codeCompleteGetContexts(
                                                  CXCodeCompleteResults *Results);
  
  /**
   * \brief Returns the cursor kind for the container for the current code
   * completion context. The container is only guaranteed to be set for
   * contexts where a container exists (i.e. member accesses or Objective-C
   * message sends); if there is not a container, this function will return
   * CXCursor_InvalidCode.
   *
   * \param Results the code completion results to query
   *
   * \param IsIncomplete on return, this value will be false if Clang has complete
   * information about the container. If Clang does not have complete
   * information, this value will be true.
   *
   * \returns the container kind, or CXCursor_InvalidCode if there is not a
   * container
   */
  CINDEX_LINKAGE
  enum CXCursorKind clang_codeCompleteGetContainerKind(
                                                   CXCodeCompleteResults *Results,
                                                       unsigned *IsIncomplete);
  
  /**
   * \brief Returns the USR for the container for the current code completion
   * context. If there is not a container for the current context, this
   * function will return the empty string.
   *
   * \param Results the code completion results to query
   *
   * \returns the USR for the container
   */
  CINDEX_LINKAGE
  CXString clang_codeCompleteGetContainerUSR(CXCodeCompleteResults *Results);
    
    
  /**
   * \brief Returns the currently-entered selector for an Objective-C message
   * send, formatted like "initWithFoo:bar:". Only guaranteed to return a
   * non-empty string for CXCompletionContext_ObjCInstanceMessage and
   * CXCompletionContext_ObjCClassMessage.
   *
   * \param Results the code completion results to query
   *
   * \returns the selector (or partial selector) that has been entered thus far
   * for an Objective-C message send.
   */
  CINDEX_LINKAGE
  CXString clang_codeCompleteGetObjCSelector(CXCodeCompleteResults *Results);
    
  /**
   * @}
   */
  
  
  /**
   * \defgroup CINDEX_MISC Miscellaneous utility functions
   *
   * @{
   */
  
  /**
   * \brief Return a version string, suitable for showing to a user, but not
   *        intended to be parsed (the format is not guaranteed to be stable).
   */
  CINDEX_LINKAGE CXString clang_getClangVersion(void);
  
    
  /**
   * \brief Enable/disable crash recovery.
   *
   * \param isEnabled Flag to indicate if crash recovery is enabled.  A non-zero
   *        value enables crash recovery, while 0 disables it.
   */
  CINDEX_LINKAGE void clang_toggleCrashRecovery(unsigned isEnabled);
    
   /**
    * \brief Visitor invoked for each file in a translation unit
    *        (used with clang_getInclusions()).
    *
    * This visitor function will be invoked by clang_getInclusions() for each
    * file included (either at the top-level or by \#include directives) within
    * a translation unit.  The first argument is the file being included, and
    * the second and third arguments provide the inclusion stack.  The
    * array is sorted in order of immediate inclusion.  For example,
    * the first element refers to the location that included 'included_file'.
    */
  typedef void (*CXInclusionVisitor)(CXFile included_file,
                                     CXSourceLocation* inclusion_stack,
                                     unsigned include_len,
                                     CXClientData client_data);
  
  /**
   * \brief Visit the set of preprocessor inclusions in a translation unit.
   *   The visitor function is called with the provided data for every included
   *   file.  This does not include headers included by the PCH file (unless one
   *   is inspecting the inclusions in the PCH file itself).
   */
  CINDEX_LINKAGE void clang_getInclusions(CXTranslationUnit tu,
                                          CXInclusionVisitor visitor,
                                          CXClientData client_data);
  
  /**
   * @}
   */
  
  /** \defgroup CINDEX_REMAPPING Remapping functions
   *
   * @{
   */
  
  /**
   * \brief A remapping of original source files and their translated files.
   */
  typedef void *CXRemapping;
  
  /**
   * \brief Retrieve a remapping.
   *
   * \param path the path that contains metadata about remappings.
   *
   * \returns the requested remapping. This remapping must be freed
   * via a call to \c clang_remap_dispose(). Can return NULL if an error occurred.
   */
  CINDEX_LINKAGE CXRemapping clang_getRemappings(const char *path);
  
  /**
   * \brief Retrieve a remapping.
   *
   * \param filePaths pointer to an array of file paths containing remapping info.
   *
   * \param numFiles number of file paths.
   *
   * \returns the requested remapping. This remapping must be freed
   * via a call to \c clang_remap_dispose(). Can return NULL if an error occurred.
   */
  CINDEX_LINKAGE
  CXRemapping clang_getRemappingsFromFileList(const char **filePaths,
                                              unsigned numFiles);
  
  /**
   * \brief Determine the number of remappings.
   */
  CINDEX_LINKAGE unsigned clang_remap_getNumFiles(CXRemapping);
  
  /**
   * \brief Get the original and the associated filename from the remapping.
   * 
   * \param original If non-NULL, will be set to the original filename.
   *
   * \param transformed If non-NULL, will be set to the filename that the original
   * is associated with.
   */
  CINDEX_LINKAGE void clang_remap_getFilenames(CXRemapping, unsigned index,
                                       CXString *original, CXString *transformed);
  
  /**
   * \brief Dispose the remapping.
   */
  CINDEX_LINKAGE void clang_remap_dispose(CXRemapping);
  
  /**
   * @}
   */
  
  /** \defgroup CINDEX_HIGH Higher level API functions
   *
   * @{
   */
  
  enum CXVisitorResult {
    CXVisit_Break,
    CXVisit_Continue
  };
  
  typedef struct {
    void *context;
    enum CXVisitorResult (*visit)(void *context, CXCursor, CXSourceRange);
  } CXCursorAndRangeVisitor;
  
  typedef enum {
    /**
     * \brief Function returned successfully.
     */
    CXResult_Success = 0,
    /**
     * \brief One of the parameters was invalid for the function.
     */
    CXResult_Invalid = 1,
    /**
     * \brief The function was terminated by a callback (e.g. it returned
     * CXVisit_Break)
     */
    CXResult_VisitBreak = 2
  
  } CXResult;
  
  /**
   * \brief Find references of a declaration in a specific file.
   * 
   * \param cursor pointing to a declaration or a reference of one.
   *
   * \param file to search for references.
   *
   * \param visitor callback that will receive pairs of CXCursor/CXSourceRange for
   * each reference found.
   * The CXSourceRange will point inside the file; if the reference is inside
   * a macro (and not a macro argument) the CXSourceRange will be invalid.
   *
   * \returns one of the CXResult enumerators.
   */
  CINDEX_LINKAGE CXResult clang_findReferencesInFile(CXCursor cursor, CXFile file,
                                                 CXCursorAndRangeVisitor visitor);
  
  /**
   * \brief Find #import/#include directives in a specific file.
   *
   * \param TU translation unit containing the file to query.
   *
   * \param file to search for #import/#include directives.
   *
   * \param visitor callback that will receive pairs of CXCursor/CXSourceRange for
   * each directive found.
   *
   * \returns one of the CXResult enumerators.
   */
  CINDEX_LINKAGE CXResult clang_findIncludesInFile(CXTranslationUnit TU,
                                                   CXFile file,
                                                CXCursorAndRangeVisitor visitor);
  
  #ifdef __has_feature
  #  if __has_feature(blocks)
  
  typedef enum CXVisitorResult
      (^CXCursorAndRangeVisitorBlock)(CXCursor, CXSourceRange);
  
  CINDEX_LINKAGE
  CXResult clang_findReferencesInFileWithBlock(CXCursor, CXFile,
                                               CXCursorAndRangeVisitorBlock);
  
  CINDEX_LINKAGE
  CXResult clang_findIncludesInFileWithBlock(CXTranslationUnit, CXFile,
                                             CXCursorAndRangeVisitorBlock);
  
  #  endif
  #endif
  
  /**
   * \brief The client's data object that is associated with a CXFile.
   */
  typedef void *CXIdxClientFile;
  
  /**
   * \brief The client's data object that is associated with a semantic entity.
   */
  typedef void *CXIdxClientEntity;
  
  /**
   * \brief The client's data object that is associated with a semantic container
   * of entities.
   */
  typedef void *CXIdxClientContainer;
  
  /**
   * \brief The client's data object that is associated with an AST file (PCH
   * or module).
   */
  typedef void *CXIdxClientASTFile;
  
  /**
   * \brief Source location passed to index callbacks.
   */
  typedef struct {
    void *ptr_data[2];
    unsigned int_data;
  } CXIdxLoc;
  
  /**
   * \brief Data for ppIncludedFile callback.
   */
  typedef struct {
    /**
     * \brief Location of '#' in the \#include/\#import directive.
     */
    CXIdxLoc hashLoc;
    /**
     * \brief Filename as written in the \#include/\#import directive.
     */
    const char *filename;
    /**
     * \brief The actual file that the \#include/\#import directive resolved to.
     */
    CXFile file;
    int isImport;
    int isAngled;
    /**
     * \brief Non-zero if the directive was automatically turned into a module
     * import.
     */
    int isModuleImport;
  } CXIdxIncludedFileInfo;
  
  /**
   * \brief Data for IndexerCallbacks#importedASTFile.
   */
  typedef struct {
    /**
     * \brief Top level AST file containing the imported PCH, module or submodule.
     */
    CXFile file;
    /**
     * \brief The imported module or NULL if the AST file is a PCH.
     */
    CXModule module;
    /**
     * \brief Location where the file is imported. Applicable only for modules.
     */
    CXIdxLoc loc;
    /**
     * \brief Non-zero if an inclusion directive was automatically turned into
     * a module import. Applicable only for modules.
     */
    int isImplicit;
  
  } CXIdxImportedASTFileInfo;
  
  typedef enum {
    CXIdxEntity_Unexposed     = 0,
    CXIdxEntity_Typedef       = 1,
    CXIdxEntity_Function      = 2,
    CXIdxEntity_Variable      = 3,
    CXIdxEntity_Field         = 4,
    CXIdxEntity_EnumConstant  = 5,
  
    CXIdxEntity_ObjCClass     = 6,
    CXIdxEntity_ObjCProtocol  = 7,
    CXIdxEntity_ObjCCategory  = 8,
  
    CXIdxEntity_ObjCInstanceMethod = 9,
    CXIdxEntity_ObjCClassMethod    = 10,
    CXIdxEntity_ObjCProperty  = 11,
    CXIdxEntity_ObjCIvar      = 12,
  
    CXIdxEntity_Enum          = 13,
    CXIdxEntity_Struct        = 14,
    CXIdxEntity_Union         = 15,
  
    CXIdxEntity_CXXClass              = 16,
    CXIdxEntity_CXXNamespace          = 17,
    CXIdxEntity_CXXNamespaceAlias     = 18,
    CXIdxEntity_CXXStaticVariable     = 19,
    CXIdxEntity_CXXStaticMethod       = 20,
    CXIdxEntity_CXXInstanceMethod     = 21,
    CXIdxEntity_CXXConstructor        = 22,
    CXIdxEntity_CXXDestructor         = 23,
    CXIdxEntity_CXXConversionFunction = 24,
    CXIdxEntity_CXXTypeAlias          = 25,
    CXIdxEntity_CXXInterface          = 26
  
  } CXIdxEntityKind;
  
  typedef enum {
    CXIdxEntityLang_None = 0,
    CXIdxEntityLang_C    = 1,
    CXIdxEntityLang_ObjC = 2,
    CXIdxEntityLang_CXX  = 3
  } CXIdxEntityLanguage;
  
  /**
   * \brief Extra C++ template information for an entity. This can apply to:
   * CXIdxEntity_Function
   * CXIdxEntity_CXXClass
   * CXIdxEntity_CXXStaticMethod
   * CXIdxEntity_CXXInstanceMethod
   * CXIdxEntity_CXXConstructor
   * CXIdxEntity_CXXConversionFunction
   * CXIdxEntity_CXXTypeAlias
   */
  typedef enum {
    CXIdxEntity_NonTemplate   = 0,
    CXIdxEntity_Template      = 1,
    CXIdxEntity_TemplatePartialSpecialization = 2,
    CXIdxEntity_TemplateSpecialization = 3
  } CXIdxEntityCXXTemplateKind;
  
  typedef enum {
    CXIdxAttr_Unexposed     = 0,
    CXIdxAttr_IBAction      = 1,
    CXIdxAttr_IBOutlet      = 2,
    CXIdxAttr_IBOutletCollection = 3
  } CXIdxAttrKind;
  
  typedef struct {
    CXIdxAttrKind kind;
    CXCursor cursor;
    CXIdxLoc loc;
  } CXIdxAttrInfo;
  
  typedef struct {
    CXIdxEntityKind kind;
    CXIdxEntityCXXTemplateKind templateKind;
    CXIdxEntityLanguage lang;
    const char *name;
    const char *USR;
    CXCursor cursor;
    const CXIdxAttrInfo *const *attributes;
    unsigned numAttributes;
  } CXIdxEntityInfo;
  
  typedef struct {
    CXCursor cursor;
  } CXIdxContainerInfo;
  
  typedef struct {
    const CXIdxAttrInfo *attrInfo;
    const CXIdxEntityInfo *objcClass;
    CXCursor classCursor;
    CXIdxLoc classLoc;
  } CXIdxIBOutletCollectionAttrInfo;
  
  typedef enum {
    CXIdxDeclFlag_Skipped = 0x1
  } CXIdxDeclInfoFlags;
  
  typedef struct {
    const CXIdxEntityInfo *entityInfo;
    CXCursor cursor;
    CXIdxLoc loc;
    const CXIdxContainerInfo *semanticContainer;
    /**
     * \brief Generally same as #semanticContainer but can be different in
     * cases like out-of-line C++ member functions.
     */
    const CXIdxContainerInfo *lexicalContainer;
    int isRedeclaration;
    int isDefinition;
    int isContainer;
    const CXIdxContainerInfo *declAsContainer;
    /**
     * \brief Whether the declaration exists in code or was created implicitly
     * by the compiler, e.g. implicit Objective-C methods for properties.
     */
    int isImplicit;
    const CXIdxAttrInfo *const *attributes;
    unsigned numAttributes;
  
    unsigned flags;
  
  } CXIdxDeclInfo;
  
  typedef enum {
    CXIdxObjCContainer_ForwardRef = 0,
    CXIdxObjCContainer_Interface = 1,
    CXIdxObjCContainer_Implementation = 2
  } CXIdxObjCContainerKind;
  
  typedef struct {
    const CXIdxDeclInfo *declInfo;
    CXIdxObjCContainerKind kind;
  } CXIdxObjCContainerDeclInfo;
  
  typedef struct {
    const CXIdxEntityInfo *base;
    CXCursor cursor;
    CXIdxLoc loc;
  } CXIdxBaseClassInfo;
  
  typedef struct {
    const CXIdxEntityInfo *protocol;
    CXCursor cursor;
    CXIdxLoc loc;
  } CXIdxObjCProtocolRefInfo;
  
  typedef struct {
    const CXIdxObjCProtocolRefInfo *const *protocols;
    unsigned numProtocols;
  } CXIdxObjCProtocolRefListInfo;
  
  typedef struct {
    const CXIdxObjCContainerDeclInfo *containerInfo;
    const CXIdxBaseClassInfo *superInfo;
    const CXIdxObjCProtocolRefListInfo *protocols;
  } CXIdxObjCInterfaceDeclInfo;
  
  typedef struct {
    const CXIdxObjCContainerDeclInfo *containerInfo;
    const CXIdxEntityInfo *objcClass;
    CXCursor classCursor;
    CXIdxLoc classLoc;
    const CXIdxObjCProtocolRefListInfo *protocols;
  } CXIdxObjCCategoryDeclInfo;
  
  typedef struct {
    const CXIdxDeclInfo *declInfo;
    const CXIdxEntityInfo *getter;
    const CXIdxEntityInfo *setter;
  } CXIdxObjCPropertyDeclInfo;
  
  typedef struct {
    const CXIdxDeclInfo *declInfo;
    const CXIdxBaseClassInfo *const *bases;
    unsigned numBases;
  } CXIdxCXXClassDeclInfo;
  
  /**
   * \brief Data for IndexerCallbacks#indexEntityReference.
   */
  typedef enum {
    /**
     * \brief The entity is referenced directly in user's code.
     */
    CXIdxEntityRef_Direct = 1,
    /**
     * \brief An implicit reference, e.g. a reference of an Objective-C method
     * via the dot syntax.
     */
    CXIdxEntityRef_Implicit = 2
  } CXIdxEntityRefKind;
  
  /**
   * \brief Data for IndexerCallbacks#indexEntityReference.
   */
  typedef struct {
    CXIdxEntityRefKind kind;
    /**
     * \brief Reference cursor.
     */
    CXCursor cursor;
    CXIdxLoc loc;
    /**
     * \brief The entity that gets referenced.
     */
    const CXIdxEntityInfo *referencedEntity;
    /**
     * \brief Immediate "parent" of the reference. For example:
     * 
     * \code
     * Foo *var;
     * \endcode
     * 
     * The parent of reference of type 'Foo' is the variable 'var'.
     * For references inside statement bodies of functions/methods,
     * the parentEntity will be the function/method.
     */
    const CXIdxEntityInfo *parentEntity;
    /**
     * \brief Lexical container context of the reference.
     */
    const CXIdxContainerInfo *container;
  } CXIdxEntityRefInfo;
  
  /**
   * \brief A group of callbacks used by #clang_indexSourceFile and
   * #clang_indexTranslationUnit.
   */
  typedef struct {
    /**
     * \brief Called periodically to check whether indexing should be aborted.
     * Should return 0 to continue, and non-zero to abort.
     */
    int (*abortQuery)(CXClientData client_data, void *reserved);
  
    /**
     * \brief Called at the end of indexing; passes the complete diagnostic set.
     */
    void (*diagnostic)(CXClientData client_data,
                       CXDiagnosticSet, void *reserved);
  
    CXIdxClientFile (*enteredMainFile)(CXClientData client_data,
                                       CXFile mainFile, void *reserved);
    
    /**
     * \brief Called when a file gets \#included/\#imported.
     */
    CXIdxClientFile (*ppIncludedFile)(CXClientData client_data,
                                      const CXIdxIncludedFileInfo *);
    
    /**
     * \brief Called when a AST file (PCH or module) gets imported.
     * 
     * AST files will not get indexed (there will not be callbacks to index all
     * the entities in an AST file). The recommended action is that, if the AST
     * file is not already indexed, to initiate a new indexing job specific to
     * the AST file.
     */
    CXIdxClientASTFile (*importedASTFile)(CXClientData client_data,
                                          const CXIdxImportedASTFileInfo *);
  
    /**
     * \brief Called at the beginning of indexing a translation unit.
     */
    CXIdxClientContainer (*startedTranslationUnit)(CXClientData client_data,
                                                   void *reserved);
  
    void (*indexDeclaration)(CXClientData client_data,
                             const CXIdxDeclInfo *);
  
    /**
     * \brief Called to index a reference of an entity.
     */
    void (*indexEntityReference)(CXClientData client_data,
                                 const CXIdxEntityRefInfo *);
  
  } IndexerCallbacks;
  
  CINDEX_LINKAGE int clang_index_isEntityObjCContainerKind(CXIdxEntityKind);
  CINDEX_LINKAGE const CXIdxObjCContainerDeclInfo *
  clang_index_getObjCContainerDeclInfo(const CXIdxDeclInfo *);
  
  CINDEX_LINKAGE const CXIdxObjCInterfaceDeclInfo *
  clang_index_getObjCInterfaceDeclInfo(const CXIdxDeclInfo *);
  
  CINDEX_LINKAGE
  const CXIdxObjCCategoryDeclInfo *
  clang_index_getObjCCategoryDeclInfo(const CXIdxDeclInfo *);
  
  CINDEX_LINKAGE const CXIdxObjCProtocolRefListInfo *
  clang_index_getObjCProtocolRefListInfo(const CXIdxDeclInfo *);
  
  CINDEX_LINKAGE const CXIdxObjCPropertyDeclInfo *
  clang_index_getObjCPropertyDeclInfo(const CXIdxDeclInfo *);
  
  CINDEX_LINKAGE const CXIdxIBOutletCollectionAttrInfo *
  clang_index_getIBOutletCollectionAttrInfo(const CXIdxAttrInfo *);
  
  CINDEX_LINKAGE const CXIdxCXXClassDeclInfo *
  clang_index_getCXXClassDeclInfo(const CXIdxDeclInfo *);
  
  /**
   * \brief For retrieving a custom CXIdxClientContainer attached to a
   * container.
   */
  CINDEX_LINKAGE CXIdxClientContainer
  clang_index_getClientContainer(const CXIdxContainerInfo *);
  
  /**
   * \brief For setting a custom CXIdxClientContainer attached to a
   * container.
   */
  CINDEX_LINKAGE void
  clang_index_setClientContainer(const CXIdxContainerInfo *,CXIdxClientContainer);
  
  /**
   * \brief For retrieving a custom CXIdxClientEntity attached to an entity.
   */
  CINDEX_LINKAGE CXIdxClientEntity
  clang_index_getClientEntity(const CXIdxEntityInfo *);
  
  /**
   * \brief For setting a custom CXIdxClientEntity attached to an entity.
   */
  CINDEX_LINKAGE void
  clang_index_setClientEntity(const CXIdxEntityInfo *, CXIdxClientEntity);
  
  /**
   * \brief An indexing action/session, to be applied to one or multiple
   * translation units.
   */
  typedef void *CXIndexAction;
  
  /**
   * \brief An indexing action/session, to be applied to one or multiple
   * translation units.
   *
   * \param CIdx The index object with which the index action will be associated.
   */
  CINDEX_LINKAGE CXIndexAction clang_IndexAction_create(CXIndex CIdx);
  
  /**
   * \brief Destroy the given index action.
   *
   * The index action must not be destroyed until all of the translation units
   * created within that index action have been destroyed.
   */
  CINDEX_LINKAGE void clang_IndexAction_dispose(CXIndexAction);
  
  typedef enum {
    /**
     * \brief Used to indicate that no special indexing options are needed.
     */
    CXIndexOpt_None = 0x0,
    
    /**
     * \brief Used to indicate that IndexerCallbacks#indexEntityReference should
     * be invoked for only one reference of an entity per source file that does
     * not also include a declaration/definition of the entity.
     */
    CXIndexOpt_SuppressRedundantRefs = 0x1,
  
    /**
     * \brief Function-local symbols should be indexed. If this is not set
     * function-local symbols will be ignored.
     */
    CXIndexOpt_IndexFunctionLocalSymbols = 0x2,
  
    /**
     * \brief Implicit function/class template instantiations should be indexed.
     * If this is not set, implicit instantiations will be ignored.
     */
    CXIndexOpt_IndexImplicitTemplateInstantiations = 0x4,
  
    /**
     * \brief Suppress all compiler warnings when parsing for indexing.
     */
    CXIndexOpt_SuppressWarnings = 0x8,
  
    /**
     * \brief Skip a function/method body that was already parsed during an
     * indexing session associated with a \c CXIndexAction object.
     * Bodies in system headers are always skipped.
     */
    CXIndexOpt_SkipParsedBodiesInSession = 0x10
  
  } CXIndexOptFlags;
  
  /**
   * \brief Index the given source file and the translation unit corresponding
   * to that file via callbacks implemented through #IndexerCallbacks.
   *
   * \param client_data pointer data supplied by the client, which will
   * be passed to the invoked callbacks.
   *
   * \param index_callbacks Pointer to indexing callbacks that the client
   * implements.
   *
   * \param index_callbacks_size Size of #IndexerCallbacks structure that gets
   * passed in index_callbacks.
   *
   * \param index_options A bitmask of options that affects how indexing is
   * performed. This should be a bitwise OR of the CXIndexOpt_XXX flags.
   *
   * \param[out] out_TU pointer to store a \c CXTranslationUnit that can be
   * reused after indexing is finished. Set to \c NULL if you do not require it.
   *
   * \returns 0 on success or if there were errors from which the compiler could
   * recover.  If there is a failure from which there is no recovery, returns
   * a non-zero \c CXErrorCode.
   *
   * The rest of the parameters are the same as #clang_parseTranslationUnit.
   */
  CINDEX_LINKAGE int clang_indexSourceFile(CXIndexAction,
                                           CXClientData client_data,
                                           IndexerCallbacks *index_callbacks,
                                           unsigned index_callbacks_size,
                                           unsigned index_options,
                                           const char *source_filename,
                                           const char * const *command_line_args,
                                           int num_command_line_args,
                                           struct CXUnsavedFile *unsaved_files,
                                           unsigned num_unsaved_files,
                                           CXTranslationUnit *out_TU,
                                           unsigned TU_options);
  
  /**
   * \brief Same as clang_indexSourceFile but requires a full command line
   * for \c command_line_args including argv[0]. This is useful if the standard
   * library paths are relative to the binary.
   */
  CINDEX_LINKAGE int clang_indexSourceFileFullArgv(
      CXIndexAction, CXClientData client_data, IndexerCallbacks *index_callbacks,
      unsigned index_callbacks_size, unsigned index_options,
      const char *source_filename, const char *const *command_line_args,
      int num_command_line_args, struct CXUnsavedFile *unsaved_files,
      unsigned num_unsaved_files, CXTranslationUnit *out_TU, unsigned TU_options);
  
  /**
   * \brief Index the given translation unit via callbacks implemented through
   * #IndexerCallbacks.
   * 
   * The order of callback invocations is not guaranteed to be the same as
   * when indexing a source file. The high level order will be:
   * 
   *   -Preprocessor callbacks invocations
   *   -Declaration/reference callbacks invocations
   *   -Diagnostic callback invocations
   *
   * The parameters are the same as #clang_indexSourceFile.
   * 
   * \returns If there is a failure from which there is no recovery, returns
   * non-zero, otherwise returns 0.
   */
  CINDEX_LINKAGE int clang_indexTranslationUnit(CXIndexAction,
                                                CXClientData client_data,
                                                IndexerCallbacks *index_callbacks,
                                                unsigned index_callbacks_size,
                                                unsigned index_options,
                                                CXTranslationUnit);
  
  /**
   * \brief Retrieve the CXIdxFile, file, line, column, and offset represented by
   * the given CXIdxLoc.
   *
   * If the location refers into a macro expansion, retrieves the
   * location of the macro expansion and if it refers into a macro argument
   * retrieves the location of the argument.
   */
  CINDEX_LINKAGE void clang_indexLoc_getFileLocation(CXIdxLoc loc,
                                                     CXIdxClientFile *indexFile,
                                                     CXFile *file,
                                                     unsigned *line,
                                                     unsigned *column,
                                                     unsigned *offset);
  
  /**
   * \brief Retrieve the CXSourceLocation represented by the given CXIdxLoc.
   */
  CINDEX_LINKAGE
  CXSourceLocation clang_indexLoc_getCXSourceLocation(CXIdxLoc loc);
  
  /**
   * \brief Visitor invoked for each field found by a traversal.
   *
   * This visitor function will be invoked for each field found by
   * \c clang_Type_visitFields. Its first argument is the cursor being
   * visited, its second argument is the client data provided to
   * \c clang_Type_visitFields.
   *
   * The visitor should return one of the \c CXVisitorResult values
   * to direct \c clang_Type_visitFields.
   */
  typedef enum CXVisitorResult (*CXFieldVisitor)(CXCursor C,
                                                 CXClientData client_data);
  
  /**
   * \brief Visit the fields of a particular type.
   *
   * This function visits all the direct fields of the given cursor,
   * invoking the given \p visitor function with the cursors of each
   * visited field. The traversal may be ended prematurely, if
   * the visitor returns \c CXFieldVisit_Break.
   *
   * \param T the record type whose field may be visited.
   *
   * \param visitor the visitor function that will be invoked for each
   * field of \p T.
   *
   * \param client_data pointer data supplied by the client, which will
   * be passed to the visitor each time it is invoked.
   *
   * \returns a non-zero value if the traversal was terminated
   * prematurely by the visitor returning \c CXFieldVisit_Break.
   */
  CINDEX_LINKAGE unsigned clang_Type_visitFields(CXType T,
                                                 CXFieldVisitor visitor,
                                                 CXClientData client_data);
  
  
  /**
   * @}
   */
  
  /**
   * @}
   */
  
  #ifdef __cplusplus
  }
  #endif
  #endif
  
  