text: // Copyright 2020 The Tint Authors.
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //     http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  #ifndef SRC_READER_SPIRV_ENUM_CONVERTER_H_
  #define SRC_READER_SPIRV_ENUM_CONVERTER_H_
  
  #include "spirv/unified1/spirv.h"
  #include "src/ast/builtin.h"
  #include "src/ast/pipeline_stage.h"
  #include "src/ast/storage_class.h"
  #include "src/reader/spirv/fail_stream.h"
  
  namespace tint {
  namespace reader {
  namespace spirv {
  
  /// A converter from SPIR-V enums to Tint AST enums.
  class EnumConverter {
   public:
    /// Creates a new enum converter.
    /// @param fail_stream the error reporting stream.
    explicit EnumConverter(const FailStream& fail_stream);
    /// Destructor
    ~EnumConverter();
  
    /// Converts a SPIR-V execution model to a Tint pipeline stage.
    /// On failure, logs an error and returns kNone
    /// @param model the SPIR-V entry point execution model
    /// @returns a Tint AST pipeline stage
    ast::PipelineStage ToPipelineStage(SpvExecutionModel model);
  
    /// Converts a SPIR-V storage class to a Tint storage class.
    /// On failure, logs an error and returns kNone
    /// @param sc the SPIR-V storage class
    /// @returns a Tint AST storage class
    ast::StorageClass ToStorageClass(const SpvStorageClass sc);
  
    /// Converts a SPIR-V Builtin value a Tint Builtin.
    /// On failure, logs an error and returns kNone
    /// @param b the SPIR-V builtin
    /// @returns a Tint AST builtin
    ast::Builtin ToBuiltin(SpvBuiltIn b);
  
   private:
    /// Registers a failure and returns a stream for log diagnostics.
    /// @returns a failure stream
    FailStream Fail() { return fail_stream_.Fail(); }
  
    FailStream fail_stream_;
  };
  
  }  // namespace spirv
  }  // namespace reader
  }  // namespace tint
  
  #endif  // SRC_READER_SPIRV_ENUM_CONVERTER_H_
  