//
//Copyright (C) 2013 LunarG, Inc.
//
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//modification, are permitted provided that the following conditions
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//    notice, this list of conditions and the following disclaimer.
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//    copyright notice, this list of conditions and the following
//    disclaimer in the documentation and/or other materials provided
//    with the distribution.
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//    from this software without specific prior written permission.
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//
// This holds context specific to the GLSL scanner, which
// sits between the preprocessor scanner and parser.
//

#include "ParseHelper.h"

namespace glslang {

class TPpContext;
class TPpToken;
class TParserToken;

class TScanContext {
public:
    explicit TScanContext(TParseContextBase& pc) : parseContext(pc), afterType(false), field(false) { }
    virtual ~TScanContext() { }

    static void fillInKeywordMap();
    static void deleteKeywordMap();

    int tokenize(TPpContext*, TParserToken&);

protected:
    TScanContext(TScanContext&);
    TScanContext& operator=(TScanContext&);

    int tokenizeIdentifier();
    int identifierOrType();
    int reservedWord();
    int identifierOrReserved(bool reserved);
    int es30ReservedFromGLSL(int version);
    int nonreservedKeyword(int esVersion, int nonEsVersion);
    int precisionKeyword();
    int matNxM();
    int dMat();
    int firstGenerationImage(bool inEs310);
    int secondGenerationImage();

    TParseContextBase& parseContext;
    bool afterType;           // true if we've recognized a type, so can only be looking for an identifier
    bool field;               // true if we're on a field, right after a '.'
    TSourceLoc loc;
    TParserToken* parserToken;
    TPpToken* ppToken;

    const char* tokenText;
    int keyword;
};

} // end namespace glslang