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//
// 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);
void lex(Token *token) override;
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_
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