text: //===- OperationKinds.h - Operation enums -----------------------*- C++ -*-===//
  //
  //                     The LLVM Compiler Infrastructure
  //
  // This file is distributed under the University of Illinois Open Source
  // License. See LICENSE.TXT for details.
  //
  //===----------------------------------------------------------------------===//
  //
  // This file enumerates the different kinds of operations that can be
  // performed by various expressions.
  //
  //===----------------------------------------------------------------------===//
  
  #ifndef LLVM_CLANG_AST_OPERATION_KINDS_H
  #define LLVM_CLANG_AST_OPERATION_KINDS_H
  
  namespace clang {
    
  /// CastKind - The kind of operation required for a conversion.
  enum CastKind {
    /// CK_Dependent - A conversion which cannot yet be analyzed because
    /// either the expression or target type is dependent.  These are
    /// created only for explicit casts; dependent ASTs aren't required
    /// to even approximately type-check.
    ///   (T*) malloc(sizeof(T))
    ///   reinterpret_cast<intptr_t>(A<T>::alloc());
    CK_Dependent,
  
    /// CK_BitCast - A conversion which causes a bit pattern of one type
    /// to be reinterpreted as a bit pattern of another type.  Generally
    /// the operands must have equivalent size and unrelated types.
    ///
    /// The pointer conversion char* -> int* is a bitcast.  Many other
    /// pointer conversions which are "physically" bitcasts are given
    /// special cast kinds.
    ///
    /// Vector coercions are bitcasts.
    CK_BitCast,
  
    /// CK_LValueBitCast - A conversion which reinterprets the address of
    /// an l-value as an l-value of a different kind.  Used for
    /// reinterpret_casts of l-value expressions to reference types.
    ///    bool b; reinterpret_cast<char&>(b) = 'a';
    CK_LValueBitCast,
    
    /// CK_LValueToRValue - A conversion which causes the extraction of
    /// an r-value from the operand gl-value.  The result of an r-value
    /// conversion is always unqualified.
    CK_LValueToRValue,
  
    /// CK_GetObjCProperty - A conversion which calls an Objective-C
    /// property getter.  The operand is an OK_ObjCProperty l-value; the
    /// result will generally be an r-value, but could be an ordinary
    /// gl-value if the property reference is to an implicit property
    /// for a method that returns a reference type.
    CK_GetObjCProperty,
      
    /// CK_NoOp - A conversion which does not affect the type other than
    /// (possibly) adding qualifiers.
    ///   int    -> int
    ///   char** -> const char * const *
    CK_NoOp,
  
    /// CK_BaseToDerived - A conversion from a C++ class pointer/reference
    /// to a derived class pointer/reference.
    ///   B *b = static_cast<B*>(a);
    CK_BaseToDerived,
  
    /// CK_DerivedToBase - A conversion from a C++ class pointer
    /// to a base class pointer.
    ///   A *a = new B();
    CK_DerivedToBase,
  
    /// CK_UncheckedDerivedToBase - A conversion from a C++ class
    /// pointer/reference to a base class that can assume that the
    /// derived pointer is not null.
    ///   const A &a = B();
    ///   b->method_from_a();
    CK_UncheckedDerivedToBase,
  
    /// CK_Dynamic - A C++ dynamic_cast.
    CK_Dynamic,
  
    /// CK_ToUnion - The GCC cast-to-union extension.
    ///   int   -> union { int x; float y; }
    ///   float -> union { int x; float y; }
    CK_ToUnion,
  
    /// CK_ArrayToPointerDecay - Array to pointer decay.
    ///   int[10] -> int*
    ///   char[5][6] -> char(*)[6]
    CK_ArrayToPointerDecay,
  
    /// CK_FunctionToPointerDecay - Function to pointer decay.
    ///   void(int) -> void(*)(int)
    CK_FunctionToPointerDecay,
  
    /// CK_NullToPointer - Null pointer constant to pointer, ObjC
    /// pointer, or block pointer.
    ///   (void*) 0
    ///   void (^block)() = 0;
    CK_NullToPointer,
  
    /// CK_NullToMemberPointer - Null pointer constant to member pointer.
    ///   int A::*mptr = 0;
    ///   int (A::*fptr)(int) = nullptr;
    CK_NullToMemberPointer,
  
    /// CK_BaseToDerivedMemberPointer - Member pointer in base class to
    /// member pointer in derived class.
    ///   int B::*mptr = &A::member;
    CK_BaseToDerivedMemberPointer,
  
    /// CK_DerivedToBaseMemberPointer - Member pointer in derived class to
    /// member pointer in base class.
    ///   int A::*mptr = static_cast<int A::*>(&B::member);
    CK_DerivedToBaseMemberPointer,
      
    /// CK_MemberPointerToBoolean - Member pointer to boolean.  A check
    /// against the null member pointer.
    CK_MemberPointerToBoolean,
  
    /// CK_UserDefinedConversion - Conversion using a user defined type
    /// conversion function.
    ///    struct A { operator int(); }; int i = int(A());
    CK_UserDefinedConversion,
  
    /// CK_ConstructorConversion - Conversion by constructor.
    ///    struct A { A(int); }; A a = A(10);
    CK_ConstructorConversion,
      
    /// CK_IntegralToPointer - Integral to pointer.  A special kind of
    /// reinterpreting conversion.  Applies to normal, ObjC, and block
    /// pointers.
    ///    (char*) 0x1001aab0
    ///    reinterpret_cast<int*>(0)
    CK_IntegralToPointer,
      
    /// CK_PointerToIntegral - Pointer to integral.  A special kind of
    /// reinterpreting conversion.  Applies to normal, ObjC, and block
    /// pointers.
    ///    (intptr_t) "help!"
    CK_PointerToIntegral,
  
    /// CK_PointerToBoolean - Pointer to boolean conversion.  A check
    /// against null.  Applies to normal, ObjC, and block pointers.
    CK_PointerToBoolean,
      
    /// CK_ToVoid - Cast to void, discarding the computed value.
    ///    (void) malloc(2048)
    CK_ToVoid,
      
    /// CK_VectorSplat - A conversion from an arithmetic type to a
    /// vector of that element type.  Fills all elements ("splats") with
    /// the source value.
    ///    __attribute__((ext_vector_type(4))) int v = 5;
    CK_VectorSplat,
      
    /// CK_IntegralCast - A cast between integral types (other than to
    /// boolean).  Variously a bitcast, a truncation, a sign-extension,
    /// or a zero-extension.
    ///    long l = 5;
    ///    (unsigned) i
    CK_IntegralCast,
  
    /// CK_IntegralToBoolean - Integral to boolean.  A check against zero.
    ///    (bool) i
    CK_IntegralToBoolean,
  
    /// CK_IntegralToFloating - Integral to floating point.
    ///    float f = i;
    CK_IntegralToFloating,
      
    /// CK_FloatingToIntegral - Floating point to integral.  Rounds
    /// towards zero, discarding any fractional component.
    ///    (int) f
    CK_FloatingToIntegral,
  
    /// CK_FloatingToBoolean - Floating point to boolean.
    ///    (bool) f
    CK_FloatingToBoolean,
      
    /// CK_FloatingCast - Casting between floating types of different size.
    ///    (double) f
    ///    (float) ld
    CK_FloatingCast,
      
    /// CK_AnyPointerToObjCPointerCast - Casting any other pointer kind
    /// to an Objective-C pointer.
    CK_AnyPointerToObjCPointerCast,
  
    /// CK_AnyPointerToBlockPointerCast - Casting any other pointer kind
    /// to a block pointer.
    CK_AnyPointerToBlockPointerCast,
  
    /// \brief Converting between two Objective-C object types, which
    /// can occur when performing reference binding to an Objective-C
    /// object.
    CK_ObjCObjectLValueCast,
  
    /// \brief A conversion of a floating point real to a floating point
    /// complex of the original type.  Injects the value as the real
    /// component with a zero imaginary component.
    ///   float -> _Complex float
    CK_FloatingRealToComplex,
  
    /// \brief Converts a floating point complex to floating point real
    /// of the source's element type.  Just discards the imaginary
    /// component.
    ///   _Complex long double -> long double
    CK_FloatingComplexToReal,
  
    /// \brief Converts a floating point complex to bool by comparing
    /// against 0+0i.
    CK_FloatingComplexToBoolean,
  
    /// \brief Converts between different floating point complex types.
    ///   _Complex float -> _Complex double
    CK_FloatingComplexCast,
  
    /// \brief Converts from a floating complex to an integral complex.
    ///   _Complex float -> _Complex int
    CK_FloatingComplexToIntegralComplex,
  
    /// \brief Converts from an integral real to an integral complex
    /// whose element type matches the source.  Injects the value as
    /// the real component with a zero imaginary component.
    ///   long -> _Complex long
    CK_IntegralRealToComplex,
  
    /// \brief Converts an integral complex to an integral real of the
    /// source's element type by discarding the imaginary component.
    ///   _Complex short -> short
    CK_IntegralComplexToReal,
  
    /// \brief Converts an integral complex to bool by comparing against
    /// 0+0i.
    CK_IntegralComplexToBoolean,
  
    /// \brief Converts between different integral complex types.
    ///   _Complex char -> _Complex long long
    ///   _Complex unsigned int -> _Complex signed int
    CK_IntegralComplexCast,
  
    /// \brief Converts from an integral complex to a floating complex.
    ///   _Complex unsigned -> _Complex float
    CK_IntegralComplexToFloatingComplex
  };
  
  #define CK_Invalid ((CastKind) -1)
  
  enum BinaryOperatorKind {
    // Operators listed in order of precedence.
    // Note that additions to this should also update the StmtVisitor class.
    BO_PtrMemD, BO_PtrMemI,       // [C++ 5.5] Pointer-to-member operators.
    BO_Mul, BO_Div, BO_Rem,       // [C99 6.5.5] Multiplicative operators.
    BO_Add, BO_Sub,               // [C99 6.5.6] Additive operators.
    BO_Shl, BO_Shr,               // [C99 6.5.7] Bitwise shift operators.
    BO_LT, BO_GT, BO_LE, BO_GE,   // [C99 6.5.8] Relational operators.
    BO_EQ, BO_NE,                 // [C99 6.5.9] Equality operators.
    BO_And,                       // [C99 6.5.10] Bitwise AND operator.
    BO_Xor,                       // [C99 6.5.11] Bitwise XOR operator.
    BO_Or,                        // [C99 6.5.12] Bitwise OR operator.
    BO_LAnd,                      // [C99 6.5.13] Logical AND operator.
    BO_LOr,                       // [C99 6.5.14] Logical OR operator.
    BO_Assign, BO_MulAssign,      // [C99 6.5.16] Assignment operators.
    BO_DivAssign, BO_RemAssign,
    BO_AddAssign, BO_SubAssign,
    BO_ShlAssign, BO_ShrAssign,
    BO_AndAssign, BO_XorAssign,
    BO_OrAssign,
    BO_Comma                      // [C99 6.5.17] Comma operator.
  };
  
  enum UnaryOperatorKind {
    // Note that additions to this should also update the StmtVisitor class.
    UO_PostInc, UO_PostDec, // [C99 6.5.2.4] Postfix increment and decrement
    UO_PreInc, UO_PreDec,   // [C99 6.5.3.1] Prefix increment and decrement
    UO_AddrOf, UO_Deref,    // [C99 6.5.3.2] Address and indirection
    UO_Plus, UO_Minus,      // [C99 6.5.3.3] Unary arithmetic
    UO_Not, UO_LNot,        // [C99 6.5.3.3] Unary arithmetic
    UO_Real, UO_Imag,       // "__real expr"/"__imag expr" Extension.
    UO_Extension            // __extension__ marker.
  };
  
  }
  
  #endif
  