f3e2a89452
git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@24518 e7fa87d3-cd2b-0410-9028-fcbf551c1848
304 lines
16 KiB
C++
304 lines
16 KiB
C++
//
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//Copyright (C) 2002-2005 3Dlabs Inc. Ltd.
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//Copyright (C) 2012-2013 LunarG, Inc.
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//
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//All rights reserved.
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//
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//Redistribution and use in source and binary forms, with or without
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//modification, are permitted provided that the following conditions
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//are met:
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//
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// Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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//
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// Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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//
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// Neither the name of 3Dlabs Inc. Ltd. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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//THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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//"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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//LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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//FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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//COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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//INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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//BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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//LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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//CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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//LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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//ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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//POSSIBILITY OF SUCH DAMAGE.
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//
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#ifndef _PARSER_HELPER_INCLUDED_
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#define _PARSER_HELPER_INCLUDED_
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#include "Versions.h"
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#include "../Include/ShHandle.h"
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#include "SymbolTable.h"
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#include "localintermediate.h"
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#include "Scan.h"
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namespace glslang {
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struct TPragma {
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TPragma(bool o, bool d) : optimize(o), debug(d) { }
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bool optimize;
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bool debug;
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TPragmaTable pragmaTable;
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};
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class TScanContext;
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class TPpContext;
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typedef std::set<int> TIdSetType;
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//
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// The following are extra variables needed during parsing, grouped together so
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// they can be passed to the parser without needing a global.
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//
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class TParseContext {
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public:
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TParseContext(TSymbolTable&, TIntermediate&, bool parsingBuiltins, int version, EProfile, EShLanguage, TInfoSink&,
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bool forwardCompatible = false, EShMessages messages = EShMsgDefault);
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void setLimits(const TBuiltInResource&);
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bool parseShaderStrings(TPpContext&, TInputScanner& input, bool versionWillBeError = false);
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void parserError(const char *s); // for bison's yyerror
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const char* getPreamble();
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void C_DECL error(TSourceLoc, const char *szReason, const char *szToken,
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const char *szExtraInfoFormat, ...);
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void C_DECL warn(TSourceLoc, const char *szReason, const char *szToken,
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const char *szExtraInfoFormat, ...);
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void reservedErrorCheck(TSourceLoc, const TString&);
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void reservedPpErrorCheck(TSourceLoc, const char* name, const char* op);
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bool lineContinuationCheck(TSourceLoc, bool endOfComment);
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bool builtInName(const TString&);
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void handlePragma(TSourceLoc, const TVector<TString>&);
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TIntermTyped* handleVariable(TSourceLoc, TSymbol* symbol, TString* string);
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TIntermTyped* handleBracketDereference(TSourceLoc, TIntermTyped* base, TIntermTyped* index);
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void checkIndex(TSourceLoc, const TType&, int& index);
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void handleIndexLimits(TSourceLoc, TIntermTyped* base, TIntermTyped* index);
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bool isIoResizeArray(const TType&);
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void handleIoResizeArrayAccess(TSourceLoc, TIntermTyped* base);
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void checkIoArraysConsistency(TSourceLoc, bool tailOnly = false);
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int getIoArrayImplicitSize() const;
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void checkIoArrayConsistency(TSourceLoc, int requiredSize, const char* feature, TType&, const TString&);
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TIntermTyped* handleDotDereference(TSourceLoc, TIntermTyped* base, TString& field);
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TFunction* handleFunctionDeclarator(TSourceLoc loc, TFunction& function, bool prototype);
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TIntermAggregate* handleFunctionDefinition(TSourceLoc, TFunction&);
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TIntermTyped* handleFunctionCall(TSourceLoc, TFunction*, TIntermNode*, TIntermAggregate*);
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void nonOpBuiltInCheck(TSourceLoc, const TFunction&, TIntermAggregate&);
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TFunction* handleConstructorCall(TSourceLoc, TPublicType&);
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bool parseVectorFields(TSourceLoc, const TString&, int vecSize, TVectorFields&);
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void assignError(TSourceLoc, const char* op, TString left, TString right);
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void unaryOpError(TSourceLoc, const char* op, TString operand);
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void binaryOpError(TSourceLoc, const char* op, TString left, TString right);
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void variableCheck(TIntermTyped*& nodePtr);
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bool lValueErrorCheck(TSourceLoc, const char* op, TIntermTyped*);
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void constantValueCheck(TIntermTyped* node, const char* token);
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void integerCheck(TIntermTyped* node, const char* token);
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void globalCheck(TSourceLoc, const char* token);
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bool constructorError(TSourceLoc, TIntermNode*, TFunction&, TOperator, TType&);
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void arraySizeCheck(TSourceLoc, TIntermTyped* expr, int& size);
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bool arrayQualifierError(TSourceLoc, const TQualifier&);
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void arraySizeRequiredCheck(TSourceLoc, int size);
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void arrayDimError(TSourceLoc);
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void arrayDimCheck(TSourceLoc, TArraySizes* sizes1, TArraySizes* sizes2);
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void arrayDimCheck(TSourceLoc, const TType*, TArraySizes*);
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bool voidErrorCheck(TSourceLoc, const TString&, TBasicType);
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void boolCheck(TSourceLoc, const TIntermTyped*);
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void boolCheck(TSourceLoc, const TPublicType&);
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void samplerCheck(TSourceLoc, const TType&, const TString& identifier);
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void pipeInOutFix(TSourceLoc, TQualifier&);
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void globalQualifierCheck(TSourceLoc, const TQualifier&, const TPublicType&);
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bool structQualifierErrorCheck(TSourceLoc, const TPublicType& pType);
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void mergeQualifiers(TSourceLoc, TQualifier& dst, const TQualifier& src, bool force);
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void setDefaultPrecision(TSourceLoc, TPublicType&, TPrecisionQualifier);
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int computeSamplerTypeIndex(TSampler&);
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TPrecisionQualifier getDefaultPrecision(TPublicType&);
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void precisionQualifierCheck(TSourceLoc, TPublicType&);
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void parameterSamplerCheck(TSourceLoc, TStorageQualifier qualifier, const TType& type);
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bool containsSampler(const TType& type);
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TSymbol* redeclareBuiltinVariable(TSourceLoc, const TString&, const TQualifier&, const TShaderQualifiers&, bool& newDeclaration);
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void redeclareBuiltinBlock(TSourceLoc, TTypeList& typeList, const TString& blockName, const TString* instanceName, TArraySizes* arraySizes);
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void paramCheckFix(TSourceLoc, const TStorageQualifier&, TType& type);
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void paramCheckFix(TSourceLoc, const TQualifier&, TType& type);
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void nestedBlockCheck(TSourceLoc);
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void nestedStructCheck(TSourceLoc);
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void arrayObjectCheck(TSourceLoc, const TType&, const char* op);
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void opaqueCheck(TSourceLoc, const TType&, const char* op);
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void structTypeCheck(TSourceLoc, TPublicType&);
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void inductiveLoopCheck(TSourceLoc, TIntermNode* init, TIntermLoop* loop);
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void arrayLimitCheck(TSourceLoc, const TString&, int size);
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void limitCheck(TSourceLoc, int value, const char* limit, const char* feature);
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void inductiveLoopBodyCheck(TIntermNode*, int loopIndexId, TSymbolTable&);
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void constantIndexExpressionCheck(TIntermNode*);
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void setLayoutQualifier(TSourceLoc, TPublicType&, TString&);
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void setLayoutQualifier(TSourceLoc, TPublicType&, TString&, int);
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void mergeShaderLayoutQualifiers(TSourceLoc, TShaderQualifiers& dst, const TShaderQualifiers& src);
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void mergeObjectLayoutQualifiers(TSourceLoc, TQualifier& dest, const TQualifier& src);
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void layoutTypeCheck(TSourceLoc, const TSymbol&);
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void layoutQualifierCheck(TSourceLoc, const TQualifier&);
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void checkNoShaderLayouts(TSourceLoc, const TShaderQualifiers&);
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const TFunction* findFunction(TSourceLoc loc, const TFunction& call, bool& builtIn);
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const TFunction* findFunctionExact(TSourceLoc loc, const TFunction& call, bool& builtIn);
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const TFunction* findFunction120(TSourceLoc loc, const TFunction& call, bool& builtIn);
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const TFunction* findFunction400(TSourceLoc loc, const TFunction& call, bool& builtIn);
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TIntermNode* declareVariable(TSourceLoc, TString& identifier, const TPublicType&, TArraySizes* typeArray = 0, TIntermTyped* initializer = 0);
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TIntermTyped* addConstructor(TSourceLoc, TIntermNode*, const TType&, TOperator);
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TIntermTyped* constructStruct(TIntermNode*, const TType&, int, TSourceLoc);
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TIntermTyped* constructBuiltIn(const TType&, TOperator, TIntermNode*, TSourceLoc, bool subset);
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void declareBlock(TSourceLoc, TTypeList& typeList, const TString* instanceName = 0, TArraySizes* arraySizes = 0);
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void addQualifierToExisting(TSourceLoc, TQualifier, const TString& identifier);
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void addQualifierToExisting(TSourceLoc, TQualifier, TIdentifierList&);
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void invariantCheck(TSourceLoc, const TType&, const TString& identifier);
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void updateStandaloneQualifierDefaults(TSourceLoc, const TPublicType&);
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void updateTypedDefaults(TSourceLoc, const TQualifier&, const TString* id);
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void wrapupSwitchSubsequence(TIntermAggregate* statements, TIntermNode* branchNode);
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TIntermNode* addSwitch(TSourceLoc, TIntermTyped* expression, TIntermAggregate* body);
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void updateMaxArraySize(TSourceLoc, TIntermNode*, int index);
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void setScanContext(TScanContext* c) { scanContext = c; }
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TScanContext* getScanContext() const { return scanContext; }
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void setPpContext(TPpContext* c) { ppContext = c; }
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TPpContext* getPpContext() const { return ppContext; }
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void addError() { ++numErrors; }
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int getNumErrors() const { return numErrors; }
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const TSourceLoc& getCurrentLoc() const { return currentScanner->getSourceLoc(); }
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void setCurrentLine(int line) { currentScanner->setLine(line); }
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void setCurrentString(int string) { currentScanner->setString(string); }
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// The following are implemented in Versions.cpp to localize version/profile/stage/extensions control
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void initializeExtensionBehavior();
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void requireProfile(TSourceLoc, int queryProfiles, const char *featureDesc);
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void profileRequires(TSourceLoc, int queryProfiles, int minVersion, int numExtensions, const char* const extensions[], const char *featureDesc);
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void profileRequires(TSourceLoc, int queryProfiles, int minVersion, const char* const extension, const char *featureDesc);
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void requireStage(TSourceLoc, EShLanguageMask, const char *featureDesc);
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void requireStage(TSourceLoc, EShLanguage, const char *featureDesc);
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void checkDeprecated(TSourceLoc, int queryProfiles, int depVersion, const char *featureDesc);
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void requireNotRemoved(TSourceLoc, int queryProfiles, int removedVersion, const char *featureDesc);
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void requireExtensions(TSourceLoc, int numExtensions, const char* const extensions[], const char *featureDesc);
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TExtensionBehavior getExtensionBehavior(const char*);
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bool extensionsTurnedOn(int numExtensions, const char* const extensions[]);
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void updateExtensionBehavior(const char* const extension, const char* behavior);
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void fullIntegerCheck(TSourceLoc, const char* op);
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void doubleCheck(TSourceLoc, const char* op);
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protected:
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void nonInitConstCheck(TSourceLoc, TString& identifier, TType& type);
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TVariable* declareNonArray(TSourceLoc, TString& identifier, TType&, bool& newDeclaration);
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void declareArray(TSourceLoc, TString& identifier, const TType&, TSymbol*&, bool& newDeclaration);
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TIntermNode* executeInitializer(TSourceLoc, TString& identifier, TIntermTyped* initializer, TVariable* variable);
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TIntermTyped* convertInitializerList(TSourceLoc, const TType&, TIntermTyped* initializer);
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TOperator mapTypeToConstructorOp(const TType&);
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void finalErrorCheck();
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public:
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//
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// Generally, bison productions, the scanner, and the PP need read/write access to these; just give them direct access
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//
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TIntermediate& intermediate; // helper for making and hooking up pieces of the parse tree
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TSymbolTable& symbolTable; // symbol table that goes with the current language, version, and profile
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TInfoSink& infoSink;
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// compilation mode
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EShLanguage language; // vertex or fragment language
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int version; // version, updated by #version in the shader
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EProfile profile; // the declared profile in the shader (core by default)
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bool forwardCompatible; // true if errors are to be given for use of deprecated features
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EShMessages messages; // errors/warnings
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// Current state of parsing
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struct TPragma contextPragma;
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int loopNestingLevel; // 0 if outside all loops
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int structNestingLevel; // 0 if outside blocks and structures
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int controlFlowNestingLevel; // 0 if outside all flow control or compound statements; also counts compound statements
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TList<TIntermSequence*> switchSequenceStack; // case, node, case, case, node, ...; ensure only one node between cases; stack of them for nesting
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TList<int> switchLevel; // the controlFlowNestingLevel the current switch statement is at, which must match the level of its case statements
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const TType* currentFunctionType; // the return type of the function that's currently being parsed
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bool functionReturnsValue; // true if a non-void function has a return
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const TString* blockName;
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TQualifier currentBlockQualifier;
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TIntermAggregate *linkage; // aggregate node of objects the linker may need, if not referenced by the rest of the AST
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TPrecisionQualifier defaultPrecision[EbtNumTypes];
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bool tokensBeforeEOF;
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TBuiltInResource resources;
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TLimits& limits;
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protected:
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TScanContext* scanContext;
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TPpContext* ppContext;
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TInputScanner* currentScanner;
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int numErrors; // number of compile-time errors encountered
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bool parsingBuiltins; // true if parsing built-in symbols/functions
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TMap<TString, TExtensionBehavior> extensionBehavior; // for each extension string, what its current behavior is set to
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static const int maxSamplerIndex = EsdNumDims * (EbtNumTypes * (2 * 2 * 2)); // see computeSamplerTypeIndex()
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TPrecisionQualifier defaultSamplerPrecision[maxSamplerIndex];
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bool afterEOF;
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TQualifier globalBufferDefaults;
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TQualifier globalUniformDefaults;
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TQualifier globalInputDefaults;
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TQualifier globalOutputDefaults;
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TString currentCaller;
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TIdSetType inductiveLoopIds;
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bool anyIndexLimits;
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TVector<TIntermTyped*> needsIndexLimitationChecking;
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//
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// Geometry shader input arrays:
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// - array sizing is based on input primitive and/or explicit size
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//
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// Tessellation control output arrays:
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// - array sizing is based on output layout(vertices=...) and/or explicit size
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//
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// Both:
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// - array sizing is retroactive
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// - built-in block redeclarations interact with this
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//
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// Design:
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// - use a per-context "resize-list", a list of entities whose array sizes
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// can be fixed; this is logically one list, but physically two:
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// * a list for nodes in the AST
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// * a list for symbols in the symbol table
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// this could be done a bit more simply, but this allows better error messages.
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//
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// - the resize-list starts empty at beginning of user-shader compilation, it does
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// not have built-ins in it
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//
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// - on built-in array use: copy-up symbol and add both the symbol and
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// its use to resize-list
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//
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// - on user array declaration: add it to the resize-list
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//
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// - on block redeclaration: copy-up symbol and add it to the resize-list
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// * note, that appropriately gives an error if redeclaring a block that
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// was already used and hence already copied-up
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//
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// - on seeing a layout declaration that sizes the array, fix everything in the
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// resize-list, giving errors for mismatch
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//
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// - on seeing an array size declaration, give errors on mismatch between it and previous
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// array-sizing declarations
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//
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TVector<TIntermSymbol*> ioArrayNodeResizeList;
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TVector<TSymbol*> ioArraySymbolResizeList;
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};
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} // end namespace glslang
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#endif // _PARSER_HELPER_INCLUDED_
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