kc3-lang/angle/src/compiler/preprocessor/DirectiveParser.h

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• Author : Geoff Lang
  Date : 2015-06-23 16:10:14
  Hash : b3a6a8f3
  Message : Error when encountering non-preprocessor tokens before #extension in ESSL3. BUG=angleproject:1047 Change-Id: I4a548270f651e35b2c8d1ab5d0f46185230c5f74 Reviewed-on: https://chromium-review.googlesource.com/281216 Reviewed-by: Jamie Madill <jmadill@chromium.org> Tested-by: Geoff Lang <geofflang@chromium.org>

• src/compiler/preprocessor/DirectiveParser.h

• //
  // Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  #ifndef COMPILER_PREPROCESSOR_DIRECTIVEPARSER_H_
  #define COMPILER_PREPROCESSOR_DIRECTIVEPARSER_H_
  
  #include "Lexer.h"
  #include "Macro.h"
  #include "pp_utils.h"
  #include "SourceLocation.h"
  
  namespace pp
  {
  
  class Diagnostics;
  class DirectiveHandler;
  class Tokenizer;
  
  class DirectiveParser : public Lexer
  {
    public:
      DirectiveParser(Tokenizer *tokenizer,
                      MacroSet *macroSet,
                      Diagnostics *diagnostics,
                      DirectiveHandler *directiveHandler);
  
      virtual void lex(Token *token);
  
    private:
      PP_DISALLOW_COPY_AND_ASSIGN(DirectiveParser);
  
      void parseDirective(Token *token);
      void parseDefine(Token *token);
      void parseUndef(Token *token);
      void parseIf(Token *token);
      void parseIfdef(Token *token);
      void parseIfndef(Token *token);
      void parseElse(Token *token);
      void parseElif(Token *token);
      void parseEndif(Token *token);
      void parseError(Token *token);
      void parsePragma(Token *token);
      void parseExtension(Token *token);
      void parseVersion(Token *token);
      void parseLine(Token *token);
  
      bool skipping() const;
      void parseConditionalIf(Token *token);
      int parseExpressionIf(Token *token);
      int parseExpressionIfdef(Token *token);
  
      struct ConditionalBlock
      {
          std::string type;
          SourceLocation location;
          bool skipBlock;
          bool skipGroup;
          bool foundValidGroup;
          bool foundElseGroup;
  
          ConditionalBlock()
              : skipBlock(false),
                skipGroup(false),
                foundValidGroup(false),
                foundElseGroup(false)
          {
          }
      };
      bool mPastFirstStatement;
      bool mSeenNonPreprocessorToken; // Tracks if a non-preprocessor token has been seen yet.  Some macros, such as
                                      // #extension must be declared before all shader code.
      std::vector<ConditionalBlock> mConditionalStack;
      Tokenizer *mTokenizer;
      MacroSet *mMacroSet;
      Diagnostics *mDiagnostics;
      DirectiveHandler *mDirectiveHandler;
      int mShaderVersion;
  };
  
  }  // namespace pp
  
  #endif  // COMPILER_PREPROCESSOR_DIRECTIVEPARSER_H_