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//
// Copyright (c) 2002-2010 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 _PARSER_HELPER_INCLUDED_
#define _PARSER_HELPER_INCLUDED_
#include "compiler/ExtensionBehavior.h"
#include "compiler/localintermediate.h"
#include "compiler/ShHandle.h"
#include "compiler/SymbolTable.h"
struct TMatrixFields {
bool wholeRow;
bool wholeCol;
int row;
int col;
};
struct TPragma {
TPragma(bool o, bool d) : optimize(o), debug(d) { }
bool optimize;
bool debug;
TPragmaTable pragmaTable;
};
//
// The following are extra variables needed during parsing, grouped together so
// they can be passed to the parser without needing a global.
//
struct TParseContext {
TParseContext(TSymbolTable& symt, const TExtensionBehavior& ext, TIntermediate& interm, ShShaderType type, ShShaderSpec spec, TInfoSink& is) :
intermediate(interm), symbolTable(symt), extensionBehavior(ext), infoSink(is), shaderType(type), shaderSpec(spec), treeRoot(0),
recoveredFromError(false), numErrors(0), lexAfterType(false), loopNestingLevel(0),
inTypeParen(false), scanner(NULL), contextPragma(true, false) { }
TIntermediate& intermediate; // to hold and build a parse tree
TSymbolTable& symbolTable; // symbol table that goes with the language currently being parsed
TExtensionBehavior extensionBehavior; // mapping between supported extensions and current behavior.
TInfoSink& infoSink;
ShShaderType shaderType; // vertex or fragment language (future: pack or unpack)
ShShaderSpec shaderSpec; // The language specification compiler conforms to - GLES2 or WebGL.
TIntermNode* treeRoot; // root of parse tree being created
bool recoveredFromError; // true if a parse error has occurred, but we continue to parse
int numErrors;
bool lexAfterType; // true if we've recognized a type, so can only be looking for an identifier
int loopNestingLevel; // 0 if outside all loops
bool inTypeParen; // true if in parentheses, looking only for an identifier
const TType* currentFunctionType; // the return type of the function that's currently being parsed
bool functionReturnsValue; // true if a non-void function has a return
void error(TSourceLoc loc, const char *reason, const char* token,
const char* extraInfoFormat, ...);
void warning(TSourceLoc loc, const char* reason, const char* token,
const char* extraInfoFormat, ...);
bool reservedErrorCheck(int line, const TString& identifier);
void recover();
bool parseVectorFields(const TString&, int vecSize, TVectorFields&, int line);
bool parseMatrixFields(const TString&, int matSize, TMatrixFields&, int line);
void assignError(int line, const char* op, TString left, TString right);
void unaryOpError(int line, const char* op, TString operand);
void binaryOpError(int line, const char* op, TString left, TString right);
bool precisionErrorCheck(int line, TPrecision precision, TBasicType type);
bool lValueErrorCheck(int line, const char* op, TIntermTyped*);
bool constErrorCheck(TIntermTyped* node);
bool integerErrorCheck(TIntermTyped* node, const char* token);
bool globalErrorCheck(int line, bool global, const char* token);
bool constructorErrorCheck(int line, TIntermNode*, TFunction&, TOperator, TType*);
bool arraySizeErrorCheck(int line, TIntermTyped* expr, int& size);
bool arrayQualifierErrorCheck(int line, TPublicType type);
bool arrayTypeErrorCheck(int line, TPublicType type);
bool arrayErrorCheck(int line, TString& identifier, TPublicType type, TVariable*& variable);
bool voidErrorCheck(int, const TString&, const TPublicType&);
bool boolErrorCheck(int, const TIntermTyped*);
bool boolErrorCheck(int, const TPublicType&);
bool samplerErrorCheck(int line, const TPublicType& pType, const char* reason);
bool structQualifierErrorCheck(int line, const TPublicType& pType);
bool parameterSamplerErrorCheck(int line, TQualifier qualifier, const TType& type);
bool containsSampler(TType& type);
bool nonInitConstErrorCheck(int line, TString& identifier, TPublicType& type);
bool nonInitErrorCheck(int line, TString& identifier, TPublicType& type);
bool paramErrorCheck(int line, TQualifier qualifier, TQualifier paramQualifier, TType* type);
bool extensionErrorCheck(int line, const TString&);
const TFunction* findFunction(int line, TFunction* pfnCall, bool *builtIn = 0);
bool executeInitializer(TSourceLoc line, TString& identifier, TPublicType& pType,
TIntermTyped* initializer, TIntermNode*& intermNode, TVariable* variable = 0);
bool areAllChildConst(TIntermAggregate* aggrNode);
TIntermTyped* addConstructor(TIntermNode*, const TType*, TOperator, TFunction*, TSourceLoc);
TIntermTyped* foldConstConstructor(TIntermAggregate* aggrNode, const TType& type);
TIntermTyped* constructStruct(TIntermNode*, TType*, int, TSourceLoc, bool subset);
TIntermTyped* constructBuiltIn(const TType*, TOperator, TIntermNode*, TSourceLoc, bool subset);
TIntermTyped* addConstVectorNode(TVectorFields&, TIntermTyped*, TSourceLoc);
TIntermTyped* addConstMatrixNode(int , TIntermTyped*, TSourceLoc);
TIntermTyped* addConstArrayNode(int index, TIntermTyped* node, TSourceLoc line);
TIntermTyped* addConstStruct(TString& , TIntermTyped*, TSourceLoc);
bool arraySetMaxSize(TIntermSymbol*, TType*, int, bool, TSourceLoc);
void* scanner;
struct TPragma contextPragma;
TString HashErrMsg;
bool AfterEOF;
};
int PaParseStrings(int count, const char* const string[], const int length[],
TParseContext* context);
typedef TParseContext* TParseContextPointer;
extern TParseContextPointer& GetGlobalParseContext();
#define GlobalParseContext GetGlobalParseContext()
typedef struct TThreadParseContextRec
{
TParseContext *lpGlobalParseContext;
} TThreadParseContext;
#endif // _PARSER_HELPER_INCLUDED_
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