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//
// Copyright (c) 2002-2013 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/translator/Diagnostics.h"
#include "compiler/translator/DirectiveHandler.h"
#include "compiler/translator/localintermediate.h"
#include "compiler/preprocessor/Preprocessor.h"
#include "compiler/translator/ShHandle.h"
#include "compiler/translator/SymbolTable.h"
struct TMatrixFields {
bool wholeRow;
bool wholeCol;
int row;
int col;
};
//
// 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, TExtensionBehavior& ext, TIntermediate& interm, ShShaderType type, ShShaderSpec spec, int options, bool checksPrecErrors, const char* sourcePath, TInfoSink& is) :
intermediate(interm),
symbolTable(symt),
shaderType(type),
shaderSpec(spec),
compileOptions(options),
sourcePath(sourcePath),
treeRoot(0),
loopNestingLevel(0),
structNestingLevel(0),
currentFunctionType(NULL),
functionReturnsValue(false),
checksPrecisionErrors(checksPrecErrors),
diagnostics(is),
directiveHandler(ext, diagnostics),
preprocessor(&diagnostics, &directiveHandler),
scanner(NULL) { }
TIntermediate& intermediate; // to hold and build a parse tree
TSymbolTable& symbolTable; // symbol table that goes with the language currently being parsed
ShShaderType shaderType; // vertex or fragment language (future: pack or unpack)
ShShaderSpec shaderSpec; // The language specification compiler conforms to - GLES2 or WebGL.
int compileOptions;
const char* sourcePath; // Path of source file or NULL.
TIntermNode* treeRoot; // root of parse tree being created
int loopNestingLevel; // 0 if outside all loops
int structNestingLevel; // incremented while parsing a struct declaration
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
bool checksPrecisionErrors; // true if an error will be generated when a variable is declared without precision, explicit or implicit.
bool fragmentPrecisionHigh; // true if highp precision is supported in the fragment language.
TString HashErrMsg;
TDiagnostics diagnostics;
TDirectiveHandler directiveHandler;
pp::Preprocessor preprocessor;
void* scanner;
int numErrors() const { return diagnostics.numErrors(); }
TInfoSink& infoSink() { return diagnostics.infoSink(); }
void error(const TSourceLoc& loc, const char *reason, const char* token,
const char* extraInfo="");
void warning(const TSourceLoc& loc, const char* reason, const char* token,
const char* extraInfo="");
void trace(const char* str);
void recover();
bool parseVectorFields(const TString&, int vecSize, TVectorFields&, const TSourceLoc& line);
bool parseMatrixFields(const TString&, int matSize, TMatrixFields&, const TSourceLoc& line);
bool reservedErrorCheck(const TSourceLoc& line, const TString& identifier);
void assignError(const TSourceLoc& line, const char* op, TString left, TString right);
void unaryOpError(const TSourceLoc& line, const char* op, TString operand);
void binaryOpError(const TSourceLoc& line, const char* op, TString left, TString right);
bool precisionErrorCheck(const TSourceLoc& line, TPrecision precision, TBasicType type);
bool lValueErrorCheck(const TSourceLoc& line, const char* op, TIntermTyped*);
bool constErrorCheck(TIntermTyped* node);
bool integerErrorCheck(TIntermTyped* node, const char* token);
bool globalErrorCheck(const TSourceLoc& line, bool global, const char* token);
bool constructorErrorCheck(const TSourceLoc& line, TIntermNode*, TFunction&, TOperator, TType*);
bool arraySizeErrorCheck(const TSourceLoc& line, TIntermTyped* expr, int& size);
bool arrayQualifierErrorCheck(const TSourceLoc& line, TPublicType type);
bool arrayTypeErrorCheck(const TSourceLoc& line, TPublicType type);
bool arrayErrorCheck(const TSourceLoc& line, TString& identifier, TPublicType type, TVariable*& variable);
bool voidErrorCheck(const TSourceLoc&, const TString&, const TPublicType&);
bool boolErrorCheck(const TSourceLoc&, const TIntermTyped*);
bool boolErrorCheck(const TSourceLoc&, const TPublicType&);
bool samplerErrorCheck(const TSourceLoc& line, const TPublicType& pType, const char* reason);
bool structQualifierErrorCheck(const TSourceLoc& line, const TPublicType& pType);
bool parameterSamplerErrorCheck(const TSourceLoc& line, TQualifier qualifier, const TType& type);
bool nonInitConstErrorCheck(const TSourceLoc& line, TString& identifier, TPublicType& type, bool array);
bool nonInitErrorCheck(const TSourceLoc& line, TString& identifier, TPublicType& type, TVariable*& variable);
bool paramErrorCheck(const TSourceLoc& line, TQualifier qualifier, TQualifier paramQualifier, TType* type);
bool extensionErrorCheck(const TSourceLoc& line, const TString&);
const TPragma& pragma() const { return directiveHandler.pragma(); }
const TExtensionBehavior& extensionBehavior() const { return directiveHandler.extensionBehavior(); }
bool supportsExtension(const char* extension);
bool isExtensionEnabled(const char* extension) const;
bool containsSampler(TType& type);
bool areAllChildConst(TIntermAggregate* aggrNode);
const TFunction* findFunction(const TSourceLoc& line, TFunction* pfnCall, bool *builtIn = 0);
bool executeInitializer(const TSourceLoc& line, TString& identifier, TPublicType& pType,
TIntermTyped* initializer, TIntermNode*& intermNode, TVariable* variable = 0);
TIntermTyped* addConstructor(TIntermNode*, const TType*, TOperator, TFunction*, const TSourceLoc&);
TIntermTyped* foldConstConstructor(TIntermAggregate* aggrNode, const TType& type);
TIntermTyped* constructStruct(TIntermNode*, TType*, int, const TSourceLoc&, bool subset);
TIntermTyped* constructBuiltIn(const TType*, TOperator, TIntermNode*, const TSourceLoc&, bool subset);
TIntermTyped* addConstVectorNode(TVectorFields&, TIntermTyped*, const TSourceLoc&);
TIntermTyped* addConstMatrixNode(int , TIntermTyped*, const TSourceLoc&);
TIntermTyped* addConstArrayNode(int index, TIntermTyped* node, const TSourceLoc& line);
TIntermTyped* addConstStruct(TString& , TIntermTyped*, const TSourceLoc&);
TIntermTyped* addIndexExpression(TIntermTyped *baseExpression, const TSourceLoc& location, TIntermTyped *indexExpression);
// Performs an error check for embedded struct declarations.
// Returns true if an error was raised due to the declaration of
// this struct.
bool enterStructDeclaration(const TSourceLoc& line, const TString& identifier);
void exitStructDeclaration();
bool structNestingErrorCheck(const TSourceLoc& line, const TField& field);
};
int PaParseStrings(size_t count, const char* const string[], const int length[],
TParseContext* context);
#endif // _PARSER_HELPER_INCLUDED_
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