2 // Copyright (c) 2002-2013 The ANGLE Project Authors. All rights reserved.
3 // Use of this source code is governed by a BSD-style license that can be
4 // found in the LICENSE file.
7 #include "ParseHelper.h"
13 #include "preprocessor/SourceLocation.h"
14 #include "ValidateGlobalInitializer.h"
15 #include "ValidateSwitch.h"
17 ///////////////////////////////////////////////////////////////////////
19 // Sub- vector and matrix fields
21 ////////////////////////////////////////////////////////////////////////
24 // Look at a '.' field selector string and change it into offsets
27 bool TParseContext::parseVectorFields(const TString& compString, int vecSize, TVectorFields& fields, const TSourceLoc &line)
29 fields.num = (int) compString.size();
31 error(line, "illegal vector field selection", compString.c_str());
41 for (int i = 0; i < fields.num; ++i) {
42 switch (compString[i]) {
44 fields.offsets[i] = 0;
48 fields.offsets[i] = 0;
52 fields.offsets[i] = 0;
56 fields.offsets[i] = 1;
60 fields.offsets[i] = 1;
64 fields.offsets[i] = 1;
68 fields.offsets[i] = 2;
72 fields.offsets[i] = 2;
76 fields.offsets[i] = 2;
80 fields.offsets[i] = 3;
84 fields.offsets[i] = 3;
88 fields.offsets[i] = 3;
92 error(line, "illegal vector field selection", compString.c_str());
97 for (int i = 0; i < fields.num; ++i) {
98 if (fields.offsets[i] >= vecSize) {
99 error(line, "vector field selection out of range", compString.c_str());
104 if (fieldSet[i] != fieldSet[i-1]) {
105 error(line, "illegal - vector component fields not from the same set", compString.c_str());
116 // Look at a '.' field selector string and change it into offsets
119 bool TParseContext::parseMatrixFields(const TString& compString, int matCols, int matRows, TMatrixFields& fields, const TSourceLoc &line)
121 fields.wholeRow = false;
122 fields.wholeCol = false;
126 if (compString.size() != 2) {
127 error(line, "illegal length of matrix field selection", compString.c_str());
131 if (compString[0] == '_') {
132 if (compString[1] < '0' || compString[1] > '3') {
133 error(line, "illegal matrix field selection", compString.c_str());
136 fields.wholeCol = true;
137 fields.col = compString[1] - '0';
138 } else if (compString[1] == '_') {
139 if (compString[0] < '0' || compString[0] > '3') {
140 error(line, "illegal matrix field selection", compString.c_str());
143 fields.wholeRow = true;
144 fields.row = compString[0] - '0';
146 if (compString[0] < '0' || compString[0] > '3' ||
147 compString[1] < '0' || compString[1] > '3') {
148 error(line, "illegal matrix field selection", compString.c_str());
151 fields.row = compString[0] - '0';
152 fields.col = compString[1] - '0';
155 if (fields.row >= matRows || fields.col >= matCols) {
156 error(line, "matrix field selection out of range", compString.c_str());
163 ///////////////////////////////////////////////////////////////////////
167 ////////////////////////////////////////////////////////////////////////
170 // Track whether errors have occurred.
172 void TParseContext::recover()
177 // Used by flex/bison to output all syntax and parsing errors.
179 void TParseContext::error(const TSourceLoc& loc,
180 const char* reason, const char* token,
181 const char* extraInfo)
183 pp::SourceLocation srcLoc(loc.first_file, loc.first_line);
184 mDiagnostics.writeInfo(pp::Diagnostics::PP_ERROR,
185 srcLoc, reason, token, extraInfo);
189 void TParseContext::warning(const TSourceLoc& loc,
190 const char* reason, const char* token,
191 const char* extraInfo) {
192 pp::SourceLocation srcLoc(loc.first_file, loc.first_line);
193 mDiagnostics.writeInfo(pp::Diagnostics::PP_WARNING,
194 srcLoc, reason, token, extraInfo);
197 void TParseContext::trace(const char* str)
199 mDiagnostics.writeDebug(str);
203 // Same error message for all places assignments don't work.
205 void TParseContext::assignError(const TSourceLoc &line, const char* op, TString left, TString right)
207 std::stringstream extraInfoStream;
208 extraInfoStream << "cannot convert from '" << right << "' to '" << left << "'";
209 std::string extraInfo = extraInfoStream.str();
210 error(line, "", op, extraInfo.c_str());
214 // Same error message for all places unary operations don't work.
216 void TParseContext::unaryOpError(const TSourceLoc &line, const char* op, TString operand)
218 std::stringstream extraInfoStream;
219 extraInfoStream << "no operation '" << op << "' exists that takes an operand of type " << operand
220 << " (or there is no acceptable conversion)";
221 std::string extraInfo = extraInfoStream.str();
222 error(line, " wrong operand type", op, extraInfo.c_str());
226 // Same error message for all binary operations don't work.
228 void TParseContext::binaryOpError(const TSourceLoc &line, const char* op, TString left, TString right)
230 std::stringstream extraInfoStream;
231 extraInfoStream << "no operation '" << op << "' exists that takes a left-hand operand of type '" << left
232 << "' and a right operand of type '" << right << "' (or there is no acceptable conversion)";
233 std::string extraInfo = extraInfoStream.str();
234 error(line, " wrong operand types ", op, extraInfo.c_str());
237 bool TParseContext::precisionErrorCheck(const TSourceLoc &line, TPrecision precision, TBasicType type){
238 if (!mChecksPrecisionErrors)
242 if( precision == EbpUndefined ){
243 error( line, "No precision specified for (float)", "" );
248 if( precision == EbpUndefined ){
249 error( line, "No precision specified (int)", "" );
260 // Both test and if necessary, spit out an error, to see if the node is really
261 // an l-value that can be operated on this way.
263 // Returns true if the was an error.
265 bool TParseContext::lValueErrorCheck(const TSourceLoc &line, const char* op, TIntermTyped* node)
267 TIntermSymbol* symNode = node->getAsSymbolNode();
268 TIntermBinary* binaryNode = node->getAsBinaryNode();
273 switch(binaryNode->getOp()) {
275 case EOpIndexIndirect:
276 case EOpIndexDirectStruct:
277 return lValueErrorCheck(line, op, binaryNode->getLeft());
278 case EOpVectorSwizzle:
279 errorReturn = lValueErrorCheck(line, op, binaryNode->getLeft());
281 int offset[4] = {0,0,0,0};
283 TIntermTyped* rightNode = binaryNode->getRight();
284 TIntermAggregate *aggrNode = rightNode->getAsAggregate();
286 for (TIntermSequence::iterator p = aggrNode->getSequence().begin();
287 p != aggrNode->getSequence().end(); p++) {
288 int value = (*p)->getAsTyped()->getAsConstantUnion()->getIConst(0);
290 if (offset[value] > 1) {
291 error(line, " l-value of swizzle cannot have duplicate components", op);
302 error(line, " l-value required", op);
308 const char* symbol = 0;
310 symbol = symNode->getSymbol().c_str();
312 const char* message = 0;
313 switch (node->getQualifier()) {
314 case EvqConstExpr: message = "can't modify a const"; break;
315 case EvqConstReadOnly: message = "can't modify a const"; break;
316 case EvqAttribute: message = "can't modify an attribute"; break;
317 case EvqFragmentIn: message = "can't modify an input"; break;
318 case EvqVertexIn: message = "can't modify an input"; break;
319 case EvqUniform: message = "can't modify a uniform"; break;
323 case EvqVaryingIn: message = "can't modify a varying"; break;
324 case EvqInput: message = "can't modify an input"; break;
325 case EvqFragCoord: message = "can't modify gl_FragCoord"; break;
326 case EvqFrontFacing: message = "can't modify gl_FrontFacing"; break;
327 case EvqPointCoord: message = "can't modify gl_PointCoord"; break;
328 case EvqInstanceID: message = "can't modify gl_InstanceID"; break;
332 // Type that can't be written to?
334 if(IsSampler(node->getBasicType()))
336 message = "can't modify a sampler";
338 else if(node->getBasicType() == EbtVoid)
340 message = "can't modify void";
344 if (message == 0 && binaryNode == 0 && symNode == 0) {
345 error(line, " l-value required", op);
352 // Everything else is okay, no error.
358 // If we get here, we have an error and a message.
361 std::stringstream extraInfoStream;
362 extraInfoStream << "\"" << symbol << "\" (" << message << ")";
363 std::string extraInfo = extraInfoStream.str();
364 error(line, " l-value required", op, extraInfo.c_str());
367 std::stringstream extraInfoStream;
368 extraInfoStream << "(" << message << ")";
369 std::string extraInfo = extraInfoStream.str();
370 error(line, " l-value required", op, extraInfo.c_str());
377 // Both test, and if necessary spit out an error, to see if the node is really
380 // Returns true if the was an error.
382 bool TParseContext::constErrorCheck(TIntermTyped* node)
384 if (node->getQualifier() == EvqConstExpr)
387 error(node->getLine(), "constant expression required", "");
393 // Both test, and if necessary spit out an error, to see if the node is really
396 // Returns true if the was an error.
398 bool TParseContext::integerErrorCheck(TIntermTyped* node, const char* token)
400 if (node->isScalarInt())
403 error(node->getLine(), "integer expression required", token);
409 // Both test, and if necessary spit out an error, to see if we are currently
412 // Returns true if the was an error.
414 bool TParseContext::globalErrorCheck(const TSourceLoc &line, bool global, const char* token)
419 error(line, "only allowed at global scope", token);
425 // For now, keep it simple: if it starts "gl_", it's reserved, independent
426 // of scope. Except, if the symbol table is at the built-in push-level,
427 // which is when we are parsing built-ins.
428 // Also checks for "webgl_" and "_webgl_" reserved identifiers if parsing a
431 // Returns true if there was an error.
433 bool TParseContext::reservedErrorCheck(const TSourceLoc &line, const TString& identifier)
435 static const char* reservedErrMsg = "reserved built-in name";
436 if (!symbolTable.atBuiltInLevel()) {
437 if (identifier.compare(0, 3, "gl_") == 0) {
438 error(line, reservedErrMsg, "gl_");
441 if (identifier.find("__") != TString::npos) {
442 error(line, "identifiers containing two consecutive underscores (__) are reserved as possible future keywords", identifier.c_str());
451 // Make sure there is enough data provided to the constructor to build
452 // something of the type of the constructor. Also returns the type of
455 // Returns true if there was an error in construction.
457 bool TParseContext::constructorErrorCheck(const TSourceLoc &line, TIntermNode* node, TFunction& function, TOperator op, TType* type)
459 *type = function.getReturnType();
461 bool constructingMatrix = false;
463 case EOpConstructMat2:
464 case EOpConstructMat2x3:
465 case EOpConstructMat2x4:
466 case EOpConstructMat3x2:
467 case EOpConstructMat3:
468 case EOpConstructMat3x4:
469 case EOpConstructMat4x2:
470 case EOpConstructMat4x3:
471 case EOpConstructMat4:
472 constructingMatrix = true;
479 // Note: It's okay to have too many components available, but not okay to have unused
480 // arguments. 'full' will go to true when enough args have been seen. If we loop
481 // again, there is an extra argument, so 'overfull' will become true.
485 bool constType = true;
487 bool overFull = false;
488 bool matrixInMatrix = false;
489 bool arrayArg = false;
490 for (size_t i = 0; i < function.getParamCount(); ++i) {
491 const TParameter& param = function.getParam(i);
492 size += param.type->getObjectSize();
494 if (constructingMatrix && param.type->isMatrix())
495 matrixInMatrix = true;
498 if (op != EOpConstructStruct && !type->isArray() && size >= type->getObjectSize())
500 if (param.type->getQualifier() != EvqConstExpr)
502 if (param.type->isArray())
507 type->setQualifier(EvqConstExpr);
509 if(type->isArray()) {
510 if(type->getArraySize() == 0) {
511 type->setArraySize(function.getParamCount());
512 } else if(type->getArraySize() != (int)function.getParamCount()) {
513 error(line, "array constructor needs one argument per array element", "constructor");
518 if (arrayArg && op != EOpConstructStruct) {
519 error(line, "constructing from a non-dereferenced array", "constructor");
523 if (matrixInMatrix && !type->isArray()) {
524 if (function.getParamCount() != 1) {
525 error(line, "constructing matrix from matrix can only take one argument", "constructor");
531 error(line, "too many arguments", "constructor");
535 if (op == EOpConstructStruct && !type->isArray() && type->getStruct()->fields().size() != function.getParamCount()) {
536 error(line, "Number of constructor parameters does not match the number of structure fields", "constructor");
540 if (!type->isMatrix() || !matrixInMatrix) {
541 if ((op != EOpConstructStruct && size != 1 && size < type->getObjectSize()) ||
542 (op == EOpConstructStruct && size < type->getObjectSize())) {
543 error(line, "not enough data provided for construction", "constructor");
548 TIntermTyped *typed = node ? node->getAsTyped() : 0;
550 error(line, "constructor argument does not have a type", "constructor");
553 if (op != EOpConstructStruct && IsSampler(typed->getBasicType())) {
554 error(line, "cannot convert a sampler", "constructor");
557 if (typed->getBasicType() == EbtVoid) {
558 error(line, "cannot convert a void", "constructor");
565 // This function checks to see if a void variable has been declared and raise an error message for such a case
567 // returns true in case of an error
569 bool TParseContext::voidErrorCheck(const TSourceLoc &line, const TString& identifier, const TBasicType& type)
571 if(type == EbtVoid) {
572 error(line, "illegal use of type 'void'", identifier.c_str());
579 // This function checks to see if the node (for the expression) contains a scalar boolean expression or not
581 // returns true in case of an error
583 bool TParseContext::boolErrorCheck(const TSourceLoc &line, const TIntermTyped* type)
585 if (type->getBasicType() != EbtBool || type->isArray() || type->isMatrix() || type->isVector()) {
586 error(line, "boolean expression expected", "");
593 // This function checks to see if the node (for the expression) contains a scalar boolean expression or not
595 // returns true in case of an error
597 bool TParseContext::boolErrorCheck(const TSourceLoc &line, const TPublicType& pType)
599 if (pType.type != EbtBool || pType.array || (pType.primarySize > 1) || (pType.secondarySize > 1)) {
600 error(line, "boolean expression expected", "");
607 bool TParseContext::samplerErrorCheck(const TSourceLoc &line, const TPublicType& pType, const char* reason)
609 if (pType.type == EbtStruct) {
610 if (containsSampler(*pType.userDef)) {
611 error(line, reason, getBasicString(pType.type), "(structure contains a sampler)");
617 } else if (IsSampler(pType.type)) {
618 error(line, reason, getBasicString(pType.type));
626 bool TParseContext::structQualifierErrorCheck(const TSourceLoc &line, const TPublicType& pType)
628 switch(pType.qualifier)
641 if(pType.type == EbtStruct)
643 error(line, "cannot be used with a structure", getQualifierString(pType.qualifier));
652 if (pType.qualifier != EvqUniform && samplerErrorCheck(line, pType, "samplers must be uniform"))
655 // check for layout qualifier issues
656 const TLayoutQualifier layoutQualifier = pType.layoutQualifier;
658 if (pType.qualifier != EvqVertexIn && pType.qualifier != EvqFragmentOut &&
659 layoutLocationErrorCheck(line, pType.layoutQualifier))
667 // These checks are common for all declarations starting a declarator list, and declarators that follow an empty
670 bool TParseContext::singleDeclarationErrorCheck(const TPublicType &publicType, const TSourceLoc &identifierLocation)
672 switch(publicType.qualifier)
679 if(publicType.type == EbtStruct)
681 error(identifierLocation, "cannot be used with a structure",
682 getQualifierString(publicType.qualifier));
689 if(publicType.qualifier != EvqUniform && samplerErrorCheck(identifierLocation, publicType,
690 "samplers must be uniform"))
695 // check for layout qualifier issues
696 const TLayoutQualifier layoutQualifier = publicType.layoutQualifier;
698 if(layoutQualifier.matrixPacking != EmpUnspecified)
700 error(identifierLocation, "layout qualifier", getMatrixPackingString(layoutQualifier.matrixPacking),
701 "only valid for interface blocks");
705 if(layoutQualifier.blockStorage != EbsUnspecified)
707 error(identifierLocation, "layout qualifier", getBlockStorageString(layoutQualifier.blockStorage),
708 "only valid for interface blocks");
712 if(publicType.qualifier != EvqVertexIn && publicType.qualifier != EvqFragmentOut &&
713 layoutLocationErrorCheck(identifierLocation, publicType.layoutQualifier))
721 bool TParseContext::layoutLocationErrorCheck(const TSourceLoc &location, const TLayoutQualifier &layoutQualifier)
723 if(layoutQualifier.location != -1)
725 error(location, "invalid layout qualifier:", "location", "only valid on program inputs and outputs");
732 bool TParseContext::locationDeclaratorListCheck(const TSourceLoc& line, const TPublicType &pType)
734 if(pType.layoutQualifier.location != -1)
736 error(line, "location must only be specified for a single input or output variable", "location");
743 bool TParseContext::parameterSamplerErrorCheck(const TSourceLoc &line, TQualifier qualifier, const TType& type)
745 if ((qualifier == EvqOut || qualifier == EvqInOut) &&
746 type.getBasicType() != EbtStruct && IsSampler(type.getBasicType())) {
747 error(line, "samplers cannot be output parameters", type.getBasicString());
754 bool TParseContext::containsSampler(TType& type)
756 if (IsSampler(type.getBasicType()))
759 if (type.getBasicType() == EbtStruct) {
760 const TFieldList& fields = type.getStruct()->fields();
761 for(unsigned int i = 0; i < fields.size(); ++i) {
762 if (containsSampler(*fields[i]->type()))
771 // Do size checking for an array type's size.
773 // Returns true if there was an error.
775 bool TParseContext::arraySizeErrorCheck(const TSourceLoc &line, TIntermTyped* expr, int& size)
777 TIntermConstantUnion* constant = expr->getAsConstantUnion();
779 if (constant == 0 || !constant->isScalarInt())
781 error(line, "array size must be a constant integer expression", "");
785 if (constant->getBasicType() == EbtUInt)
787 unsigned int uintSize = constant->getUConst(0);
788 if (uintSize > static_cast<unsigned int>(std::numeric_limits<int>::max()))
790 error(line, "array size too large", "");
795 size = static_cast<int>(uintSize);
799 size = constant->getIConst(0);
803 error(line, "array size must be a positive integer", "");
813 // See if this qualifier can be an array.
815 // Returns true if there is an error.
817 bool TParseContext::arrayQualifierErrorCheck(const TSourceLoc &line, TPublicType type)
819 if ((type.qualifier == EvqAttribute) || (type.qualifier == EvqVertexIn) || (type.qualifier == EvqConstExpr)) {
820 error(line, "cannot declare arrays of this qualifier", TType(type).getCompleteString().c_str());
828 // See if this type can be an array.
830 // Returns true if there is an error.
832 bool TParseContext::arrayTypeErrorCheck(const TSourceLoc &line, TPublicType type)
835 // Can the type be an array?
838 error(line, "cannot declare arrays of arrays", TType(type).getCompleteString().c_str());
845 bool TParseContext::arraySetMaxSize(TIntermSymbol *node, TType* type, int size, bool updateFlag, const TSourceLoc &line)
847 bool builtIn = false;
848 TSymbol* symbol = symbolTable.find(node->getSymbol(), mShaderVersion, &builtIn);
850 error(line, " undeclared identifier", node->getSymbol().c_str());
853 TVariable* variable = static_cast<TVariable*>(symbol);
855 type->setArrayInformationType(variable->getArrayInformationType());
856 variable->updateArrayInformationType(type);
858 // special casing to test index value of gl_FragData. If the accessed index is >= gl_MaxDrawBuffers
860 if (node->getSymbol() == "gl_FragData") {
861 TSymbol* fragData = symbolTable.find("gl_MaxDrawBuffers", mShaderVersion, &builtIn);
864 int fragDataValue = static_cast<TVariable*>(fragData)->getConstPointer()[0].getIConst();
865 if (fragDataValue <= size) {
866 error(line, "", "[", "gl_FragData can only have a max array size of up to gl_MaxDrawBuffers");
871 // we dont want to update the maxArraySize when this flag is not set, we just want to include this
872 // node type in the chain of node types so that its updated when a higher maxArraySize comes in.
877 variable->getType().setMaxArraySize(size);
878 type->setMaxArraySize(size);
881 while(tt->getArrayInformationType() != 0) {
882 tt = tt->getArrayInformationType();
883 tt->setMaxArraySize(size);
890 // Enforce non-initializer type/qualifier rules.
892 // Returns true if there was an error.
894 bool TParseContext::nonInitConstErrorCheck(const TSourceLoc &line, TString& identifier, TPublicType& type, bool array)
896 if (type.qualifier == EvqConstExpr)
898 // Make the qualifier make sense.
899 type.qualifier = EvqTemporary;
903 error(line, "arrays may not be declared constant since they cannot be initialized", identifier.c_str());
905 else if (type.isStructureContainingArrays())
907 error(line, "structures containing arrays may not be declared constant since they cannot be initialized", identifier.c_str());
911 error(line, "variables with qualifier 'const' must be initialized", identifier.c_str());
921 // Do semantic checking for a variable declaration that has no initializer,
922 // and update the symbol table.
924 // Returns true if there was an error.
926 bool TParseContext::nonInitErrorCheck(const TSourceLoc &line, const TString& identifier, TPublicType& type)
928 if(type.qualifier == EvqConstExpr)
930 // Make the qualifier make sense.
931 type.qualifier = EvqTemporary;
933 // Generate informative error messages for ESSL1.
934 // In ESSL3 arrays and structures containing arrays can be constant.
935 if(mShaderVersion < 300 && type.isStructureContainingArrays())
938 "structures containing arrays may not be declared constant since they cannot be initialized",
943 error(line, "variables with qualifier 'const' must be initialized", identifier.c_str());
948 if(type.isUnsizedArray())
950 error(line, "implicitly sized arrays need to be initialized", identifier.c_str());
956 // Do some simple checks that are shared between all variable declarations,
957 // and update the symbol table.
959 // Returns true if declaring the variable succeeded.
961 bool TParseContext::declareVariable(const TSourceLoc &line, const TString &identifier, const TType &type,
962 TVariable **variable)
964 ASSERT((*variable) == nullptr);
966 // gl_LastFragData may be redeclared with a new precision qualifier
967 if(type.isArray() && identifier.compare(0, 15, "gl_LastFragData") == 0)
969 const TVariable *maxDrawBuffers =
970 static_cast<const TVariable *>(symbolTable.findBuiltIn("gl_MaxDrawBuffers", mShaderVersion));
971 if(type.getArraySize() != maxDrawBuffers->getConstPointer()->getIConst())
973 error(line, "redeclaration of gl_LastFragData with size != gl_MaxDrawBuffers", identifier.c_str());
978 if(reservedErrorCheck(line, identifier))
981 (*variable) = new TVariable(&identifier, type);
982 if(!symbolTable.declare(**variable))
984 error(line, "redefinition", identifier.c_str());
986 (*variable) = nullptr;
990 if(voidErrorCheck(line, identifier, type.getBasicType()))
996 bool TParseContext::paramErrorCheck(const TSourceLoc &line, TQualifier qualifier, TQualifier paramQualifier, TType* type)
998 if (qualifier != EvqConstReadOnly && qualifier != EvqTemporary) {
999 error(line, "qualifier not allowed on function parameter", getQualifierString(qualifier));
1002 if (qualifier == EvqConstReadOnly && paramQualifier != EvqIn) {
1003 error(line, "qualifier not allowed with ", getQualifierString(qualifier), getQualifierString(paramQualifier));
1007 if (qualifier == EvqConstReadOnly)
1008 type->setQualifier(EvqConstReadOnly);
1010 type->setQualifier(paramQualifier);
1015 bool TParseContext::extensionErrorCheck(const TSourceLoc &line, const TString& extension)
1017 const TExtensionBehavior& extBehavior = extensionBehavior();
1018 TExtensionBehavior::const_iterator iter = extBehavior.find(extension.c_str());
1019 if (iter == extBehavior.end()) {
1020 error(line, "extension", extension.c_str(), "is not supported");
1023 // In GLSL ES, an extension's default behavior is "disable".
1024 if (iter->second == EBhDisable || iter->second == EBhUndefined) {
1025 error(line, "extension", extension.c_str(), "is disabled");
1028 if (iter->second == EBhWarn) {
1029 warning(line, "extension", extension.c_str(), "is being used");
1036 bool TParseContext::functionCallLValueErrorCheck(const TFunction *fnCandidate, TIntermAggregate *aggregate)
1038 for(size_t i = 0; i < fnCandidate->getParamCount(); ++i)
1040 TQualifier qual = fnCandidate->getParam(i).type->getQualifier();
1041 if(qual == EvqOut || qual == EvqInOut)
1043 TIntermTyped *node = (aggregate->getSequence())[i]->getAsTyped();
1044 if(lValueErrorCheck(node->getLine(), "assign", node))
1046 error(node->getLine(),
1047 "Constant value cannot be passed for 'out' or 'inout' parameters.", "Error");
1056 void TParseContext::es3InvariantErrorCheck(const TQualifier qualifier, const TSourceLoc &invariantLocation)
1063 case EvqCentroidOut:
1065 case EvqFragmentOut:
1068 error(invariantLocation, "Only out variables can be invariant.", "invariant");
1074 bool TParseContext::supportsExtension(const char* extension)
1076 const TExtensionBehavior& extbehavior = extensionBehavior();
1077 TExtensionBehavior::const_iterator iter = extbehavior.find(extension);
1078 return (iter != extbehavior.end());
1081 void TParseContext::handleExtensionDirective(const TSourceLoc &line, const char* extName, const char* behavior)
1083 pp::SourceLocation loc(line.first_file, line.first_line);
1084 mDirectiveHandler.handleExtension(loc, extName, behavior);
1087 void TParseContext::handlePragmaDirective(const TSourceLoc &line, const char* name, const char* value)
1089 pp::SourceLocation loc(line.first_file, line.first_line);
1090 mDirectiveHandler.handlePragma(loc, name, value);
1093 /////////////////////////////////////////////////////////////////////////////////
1097 /////////////////////////////////////////////////////////////////////////////////
1099 const TVariable *TParseContext::getNamedVariable(const TSourceLoc &location,
1100 const TString *name,
1101 const TSymbol *symbol)
1103 const TVariable *variable = NULL;
1107 error(location, "undeclared identifier", name->c_str());
1110 else if(!symbol->isVariable())
1112 error(location, "variable expected", name->c_str());
1117 variable = static_cast<const TVariable*>(symbol);
1119 if(symbolTable.findBuiltIn(variable->getName(), mShaderVersion))
1124 // Reject shaders using both gl_FragData and gl_FragColor
1125 TQualifier qualifier = variable->getType().getQualifier();
1126 if(qualifier == EvqFragData)
1128 mUsesFragData = true;
1130 else if(qualifier == EvqFragColor)
1132 mUsesFragColor = true;
1135 // This validation is not quite correct - it's only an error to write to
1136 // both FragData and FragColor. For simplicity, and because users shouldn't
1137 // be rewarded for reading from undefined varaibles, return an error
1138 // if they are both referenced, rather than assigned.
1139 if(mUsesFragData && mUsesFragColor)
1141 error(location, "cannot use both gl_FragData and gl_FragColor", name->c_str());
1148 TType type(EbtFloat, EbpUndefined);
1149 TVariable *fakeVariable = new TVariable(name, type);
1150 symbolTable.declare(*fakeVariable);
1151 variable = fakeVariable;
1158 // Look up a function name in the symbol table, and make sure it is a function.
1160 // Return the function symbol if found, otherwise 0.
1162 const TFunction* TParseContext::findFunction(const TSourceLoc &line, TFunction* call, bool *builtIn)
1164 // First find by unmangled name to check whether the function name has been
1165 // hidden by a variable name or struct typename.
1166 const TSymbol* symbol = symbolTable.find(call->getName(), mShaderVersion, builtIn);
1168 symbol = symbolTable.find(call->getMangledName(), mShaderVersion, builtIn);
1172 error(line, "no matching overloaded function found", call->getName().c_str());
1176 if (!symbol->isFunction()) {
1177 error(line, "function name expected", call->getName().c_str());
1181 return static_cast<const TFunction*>(symbol);
1185 // Initializers show up in several places in the grammar. Have one set of
1186 // code to handle them here.
1188 bool TParseContext::executeInitializer(const TSourceLoc& line, const TString& identifier, const TPublicType& pType,
1189 TIntermTyped *initializer, TIntermNode **intermNode)
1191 ASSERT(intermNode != nullptr);
1192 TType type = TType(pType);
1194 TVariable *variable = nullptr;
1195 if(type.isArray() && (type.getArraySize() == 0))
1197 type.setArraySize(initializer->getArraySize());
1199 if(!declareVariable(line, identifier, type, &variable))
1204 bool globalInitWarning = false;
1205 if(symbolTable.atGlobalLevel() && !ValidateGlobalInitializer(initializer, this, &globalInitWarning))
1207 // Error message does not completely match behavior with ESSL 1.00, but
1208 // we want to steer developers towards only using constant expressions.
1209 error(line, "global variable initializers must be constant expressions", "=");
1212 if(globalInitWarning)
1214 warning(line, "global variable initializers should be constant expressions "
1215 "(uniforms and globals are allowed in global initializers for legacy compatibility)", "=");
1219 // identifier must be of type constant, a global, or a temporary
1221 TQualifier qualifier = variable->getType().getQualifier();
1222 if ((qualifier != EvqTemporary) && (qualifier != EvqGlobal) && (qualifier != EvqConstExpr)) {
1223 error(line, " cannot initialize this type of qualifier ", variable->getType().getQualifierString());
1227 // test for and propagate constant
1230 if (qualifier == EvqConstExpr) {
1231 if (qualifier != initializer->getType().getQualifier()) {
1232 std::stringstream extraInfoStream;
1233 extraInfoStream << "'" << variable->getType().getCompleteString() << "'";
1234 std::string extraInfo = extraInfoStream.str();
1235 error(line, " assigning non-constant to", "=", extraInfo.c_str());
1236 variable->getType().setQualifier(EvqTemporary);
1239 if (type != initializer->getType()) {
1240 error(line, " non-matching types for const initializer ",
1241 variable->getType().getQualifierString());
1242 variable->getType().setQualifier(EvqTemporary);
1245 if (initializer->getAsConstantUnion()) {
1246 variable->shareConstPointer(initializer->getAsConstantUnion()->getUnionArrayPointer());
1247 } else if (initializer->getAsSymbolNode()) {
1248 const TSymbol* symbol = symbolTable.find(initializer->getAsSymbolNode()->getSymbol(), 0);
1249 const TVariable* tVar = static_cast<const TVariable*>(symbol);
1251 ConstantUnion* constArray = tVar->getConstPointer();
1252 variable->shareConstPointer(constArray);
1254 std::stringstream extraInfoStream;
1255 extraInfoStream << "'" << variable->getType().getCompleteString() << "'";
1256 std::string extraInfo = extraInfoStream.str();
1257 error(line, " cannot assign to", "=", extraInfo.c_str());
1258 variable->getType().setQualifier(EvqTemporary);
1263 if (qualifier != EvqConstExpr) {
1264 TIntermSymbol* intermSymbol = intermediate.addSymbol(variable->getUniqueId(), variable->getName(), variable->getType(), line);
1265 *intermNode = createAssign(EOpInitialize, intermSymbol, initializer, line);
1266 if(*intermNode == nullptr) {
1267 assignError(line, "=", intermSymbol->getCompleteString(), initializer->getCompleteString());
1271 *intermNode = nullptr;
1276 bool TParseContext::areAllChildConst(TIntermAggregate* aggrNode)
1278 ASSERT(aggrNode != NULL);
1279 if (!aggrNode->isConstructor())
1282 bool allConstant = true;
1284 // check if all the child nodes are constants so that they can be inserted into
1286 TIntermSequence &sequence = aggrNode->getSequence() ;
1287 for (TIntermSequence::iterator p = sequence.begin(); p != sequence.end(); ++p) {
1288 if (!(*p)->getAsTyped()->getAsConstantUnion())
1295 TPublicType TParseContext::addFullySpecifiedType(TQualifier qualifier, bool invariant, TLayoutQualifier layoutQualifier, const TPublicType &typeSpecifier)
1297 TPublicType returnType = typeSpecifier;
1298 returnType.qualifier = qualifier;
1299 returnType.invariant = invariant;
1300 returnType.layoutQualifier = layoutQualifier;
1302 if(typeSpecifier.array)
1304 error(typeSpecifier.line, "not supported", "first-class array");
1306 returnType.clearArrayness();
1309 if(mShaderVersion < 300)
1311 if(qualifier == EvqAttribute && (typeSpecifier.type == EbtBool || typeSpecifier.type == EbtInt))
1313 error(typeSpecifier.line, "cannot be bool or int", getQualifierString(qualifier));
1317 if((qualifier == EvqVaryingIn || qualifier == EvqVaryingOut) &&
1318 (typeSpecifier.type == EbtBool || typeSpecifier.type == EbtInt))
1320 error(typeSpecifier.line, "cannot be bool or int", getQualifierString(qualifier));
1332 case EvqCentroidOut:
1334 if(typeSpecifier.type == EbtBool)
1336 error(typeSpecifier.line, "cannot be bool", getQualifierString(qualifier));
1339 if(typeSpecifier.type == EbtInt || typeSpecifier.type == EbtUInt)
1341 error(typeSpecifier.line, "must use 'flat' interpolation here", getQualifierString(qualifier));
1347 case EvqFragmentOut:
1350 if(typeSpecifier.type == EbtBool)
1352 error(typeSpecifier.line, "cannot be bool", getQualifierString(qualifier));
1364 TIntermAggregate *TParseContext::parseSingleDeclaration(TPublicType &publicType,
1365 const TSourceLoc &identifierOrTypeLocation,
1366 const TString &identifier)
1368 TIntermSymbol *symbol = intermediate.addSymbol(0, identifier, TType(publicType), identifierOrTypeLocation);
1370 bool emptyDeclaration = (identifier == "");
1372 mDeferredSingleDeclarationErrorCheck = emptyDeclaration;
1374 if(emptyDeclaration)
1376 if(publicType.isUnsizedArray())
1378 // ESSL3 spec section 4.1.9: Array declaration which leaves the size unspecified is an error.
1379 // It is assumed that this applies to empty declarations as well.
1380 error(identifierOrTypeLocation, "empty array declaration needs to specify a size", identifier.c_str());
1385 if(singleDeclarationErrorCheck(publicType, identifierOrTypeLocation))
1388 if(nonInitErrorCheck(identifierOrTypeLocation, identifier, publicType))
1391 TVariable *variable = nullptr;
1392 if(!declareVariable(identifierOrTypeLocation, identifier, TType(publicType), &variable))
1395 if(variable && symbol)
1396 symbol->setId(variable->getUniqueId());
1399 return intermediate.makeAggregate(symbol, identifierOrTypeLocation);
1402 TIntermAggregate *TParseContext::parseSingleArrayDeclaration(TPublicType &publicType,
1403 const TSourceLoc &identifierLocation,
1404 const TString &identifier,
1405 const TSourceLoc &indexLocation,
1406 TIntermTyped *indexExpression)
1408 mDeferredSingleDeclarationErrorCheck = false;
1410 if(singleDeclarationErrorCheck(publicType, identifierLocation))
1413 if(nonInitErrorCheck(identifierLocation, identifier, publicType))
1416 if(arrayTypeErrorCheck(indexLocation, publicType) || arrayQualifierErrorCheck(indexLocation, publicType))
1421 TType arrayType(publicType);
1424 if(arraySizeErrorCheck(identifierLocation, indexExpression, size))
1428 // Make the type an array even if size check failed.
1429 // This ensures useless error messages regarding the variable's non-arrayness won't follow.
1430 arrayType.setArraySize(size);
1432 TVariable *variable = nullptr;
1433 if(!declareVariable(identifierLocation, identifier, arrayType, &variable))
1436 TIntermSymbol *symbol = intermediate.addSymbol(0, identifier, arrayType, identifierLocation);
1437 if(variable && symbol)
1438 symbol->setId(variable->getUniqueId());
1440 return intermediate.makeAggregate(symbol, identifierLocation);
1443 TIntermAggregate *TParseContext::parseSingleInitDeclaration(const TPublicType &publicType,
1444 const TSourceLoc &identifierLocation,
1445 const TString &identifier,
1446 const TSourceLoc &initLocation,
1447 TIntermTyped *initializer)
1449 mDeferredSingleDeclarationErrorCheck = false;
1451 if(singleDeclarationErrorCheck(publicType, identifierLocation))
1454 TIntermNode *intermNode = nullptr;
1455 if(!executeInitializer(identifierLocation, identifier, publicType, initializer, &intermNode))
1458 // Build intermediate representation
1460 return intermNode ? intermediate.makeAggregate(intermNode, initLocation) : nullptr;
1469 TIntermAggregate *TParseContext::parseSingleArrayInitDeclaration(TPublicType &publicType,
1470 const TSourceLoc &identifierLocation,
1471 const TString &identifier,
1472 const TSourceLoc &indexLocation,
1473 TIntermTyped *indexExpression,
1474 const TSourceLoc &initLocation,
1475 TIntermTyped *initializer)
1477 mDeferredSingleDeclarationErrorCheck = false;
1479 if(singleDeclarationErrorCheck(publicType, identifierLocation))
1482 if(arrayTypeErrorCheck(indexLocation, publicType) || arrayQualifierErrorCheck(indexLocation, publicType))
1487 TPublicType arrayType(publicType);
1490 // If indexExpression is nullptr, then the array will eventually get its size implicitly from the initializer.
1491 if(indexExpression != nullptr && arraySizeErrorCheck(identifierLocation, indexExpression, size))
1495 // Make the type an array even if size check failed.
1496 // This ensures useless error messages regarding the variable's non-arrayness won't follow.
1497 arrayType.setArray(true, size);
1499 // initNode will correspond to the whole of "type b[n] = initializer".
1500 TIntermNode *initNode = nullptr;
1501 if(!executeInitializer(identifierLocation, identifier, arrayType, initializer, &initNode))
1503 return initNode ? intermediate.makeAggregate(initNode, initLocation) : nullptr;
1512 TIntermAggregate *TParseContext::parseInvariantDeclaration(const TSourceLoc &invariantLoc,
1513 const TSourceLoc &identifierLoc,
1514 const TString *identifier,
1515 const TSymbol *symbol)
1517 // invariant declaration
1518 if(globalErrorCheck(invariantLoc, symbolTable.atGlobalLevel(), "invariant varying"))
1525 error(identifierLoc, "undeclared identifier declared as invariant", identifier->c_str());
1531 const TString kGlFrontFacing("gl_FrontFacing");
1532 if(*identifier == kGlFrontFacing)
1534 error(identifierLoc, "identifier should not be declared as invariant", identifier->c_str());
1538 symbolTable.addInvariantVarying(std::string(identifier->c_str()));
1539 const TVariable *variable = getNamedVariable(identifierLoc, identifier, symbol);
1541 const TType &type = variable->getType();
1542 TIntermSymbol *intermSymbol = intermediate.addSymbol(variable->getUniqueId(),
1543 *identifier, type, identifierLoc);
1545 TIntermAggregate *aggregate = intermediate.makeAggregate(intermSymbol, identifierLoc);
1546 aggregate->setOp(EOpInvariantDeclaration);
1551 TIntermAggregate *TParseContext::parseDeclarator(TPublicType &publicType, TIntermAggregate *aggregateDeclaration,
1552 const TSourceLoc &identifierLocation, const TString &identifier)
1554 // If the declaration starting this declarator list was empty (example: int,), some checks were not performed.
1555 if(mDeferredSingleDeclarationErrorCheck)
1557 if(singleDeclarationErrorCheck(publicType, identifierLocation))
1559 mDeferredSingleDeclarationErrorCheck = false;
1562 if(locationDeclaratorListCheck(identifierLocation, publicType))
1565 if(nonInitErrorCheck(identifierLocation, identifier, publicType))
1568 TVariable *variable = nullptr;
1569 if(!declareVariable(identifierLocation, identifier, TType(publicType), &variable))
1572 TIntermSymbol *symbol = intermediate.addSymbol(0, identifier, TType(publicType), identifierLocation);
1573 if(variable && symbol)
1574 symbol->setId(variable->getUniqueId());
1576 return intermediate.growAggregate(aggregateDeclaration, symbol, identifierLocation);
1579 TIntermAggregate *TParseContext::parseArrayDeclarator(TPublicType &publicType, TIntermAggregate *aggregateDeclaration,
1580 const TSourceLoc &identifierLocation, const TString &identifier,
1581 const TSourceLoc &arrayLocation, TIntermTyped *indexExpression)
1583 // If the declaration starting this declarator list was empty (example: int,), some checks were not performed.
1584 if(mDeferredSingleDeclarationErrorCheck)
1586 if(singleDeclarationErrorCheck(publicType, identifierLocation))
1588 mDeferredSingleDeclarationErrorCheck = false;
1591 if(locationDeclaratorListCheck(identifierLocation, publicType))
1594 if(nonInitErrorCheck(identifierLocation, identifier, publicType))
1597 if(arrayTypeErrorCheck(arrayLocation, publicType) || arrayQualifierErrorCheck(arrayLocation, publicType))
1603 TType arrayType = TType(publicType);
1605 if(arraySizeErrorCheck(arrayLocation, indexExpression, size))
1609 arrayType.setArraySize(size);
1611 TVariable *variable = nullptr;
1612 if(!declareVariable(identifierLocation, identifier, arrayType, &variable))
1615 TIntermSymbol *symbol = intermediate.addSymbol(0, identifier, arrayType, identifierLocation);
1616 if(variable && symbol)
1617 symbol->setId(variable->getUniqueId());
1619 return intermediate.growAggregate(aggregateDeclaration, symbol, identifierLocation);
1625 TIntermAggregate *TParseContext::parseInitDeclarator(const TPublicType &publicType, TIntermAggregate *aggregateDeclaration,
1626 const TSourceLoc &identifierLocation, const TString &identifier,
1627 const TSourceLoc &initLocation, TIntermTyped *initializer)
1629 // If the declaration starting this declarator list was empty (example: int,), some checks were not performed.
1630 if(mDeferredSingleDeclarationErrorCheck)
1632 if(singleDeclarationErrorCheck(publicType, identifierLocation))
1634 mDeferredSingleDeclarationErrorCheck = false;
1637 if(locationDeclaratorListCheck(identifierLocation, publicType))
1640 TIntermNode *intermNode = nullptr;
1641 if(!executeInitializer(identifierLocation, identifier, publicType, initializer, &intermNode))
1644 // build the intermediate representation
1648 return intermediate.growAggregate(aggregateDeclaration, intermNode, initLocation);
1652 return aggregateDeclaration;
1662 TIntermAggregate *TParseContext::parseArrayInitDeclarator(const TPublicType &publicType,
1663 TIntermAggregate *aggregateDeclaration,
1664 const TSourceLoc &identifierLocation,
1665 const TString &identifier,
1666 const TSourceLoc &indexLocation,
1667 TIntermTyped *indexExpression,
1668 const TSourceLoc &initLocation, TIntermTyped *initializer)
1670 // If the declaration starting this declarator list was empty (example: int,), some checks were not performed.
1671 if(mDeferredSingleDeclarationErrorCheck)
1673 if(singleDeclarationErrorCheck(publicType, identifierLocation))
1675 mDeferredSingleDeclarationErrorCheck = false;
1678 if(locationDeclaratorListCheck(identifierLocation, publicType))
1681 if(arrayTypeErrorCheck(indexLocation, publicType) || arrayQualifierErrorCheck(indexLocation, publicType))
1686 TPublicType arrayType(publicType);
1689 // If indexExpression is nullptr, then the array will eventually get its size implicitly from the initializer.
1690 if(indexExpression != nullptr && arraySizeErrorCheck(identifierLocation, indexExpression, size))
1694 // Make the type an array even if size check failed.
1695 // This ensures useless error messages regarding the variable's non-arrayness won't follow.
1696 arrayType.setArray(true, size);
1698 // initNode will correspond to the whole of "b[n] = initializer".
1699 TIntermNode *initNode = nullptr;
1700 if(!executeInitializer(identifierLocation, identifier, arrayType, initializer, &initNode))
1704 return intermediate.growAggregate(aggregateDeclaration, initNode, initLocation);
1708 return aggregateDeclaration;
1718 void TParseContext::parseGlobalLayoutQualifier(const TPublicType &typeQualifier)
1720 if(mShaderVersion < 300)
1722 error(typeQualifier.line, "layout qualifiers supported in GLSL ES 3.00 only", "layout");
1727 if(typeQualifier.qualifier != EvqUniform)
1729 error(typeQualifier.line, "invalid qualifier:", getQualifierString(typeQualifier.qualifier), "global layout must be uniform");
1734 const TLayoutQualifier layoutQualifier = typeQualifier.layoutQualifier;
1735 ASSERT(!layoutQualifier.isEmpty());
1737 if(layoutLocationErrorCheck(typeQualifier.line, typeQualifier.layoutQualifier))
1743 if(layoutQualifier.matrixPacking != EmpUnspecified)
1745 mDefaultMatrixPacking = layoutQualifier.matrixPacking;
1748 if(layoutQualifier.blockStorage != EbsUnspecified)
1750 mDefaultBlockStorage = layoutQualifier.blockStorage;
1754 TFunction *TParseContext::addConstructorFunc(const TPublicType &publicTypeIn)
1756 TPublicType publicType = publicTypeIn;
1757 TOperator op = EOpNull;
1758 if(publicType.userDef)
1760 op = EOpConstructStruct;
1764 switch(publicType.type)
1767 if(publicType.isMatrix())
1769 switch(publicType.getCols())
1772 switch(publicType.getRows())
1774 case 2: op = EOpConstructMat2; break;
1775 case 3: op = EOpConstructMat2x3; break;
1776 case 4: op = EOpConstructMat2x4; break;
1780 switch(publicType.getRows())
1782 case 2: op = EOpConstructMat3x2; break;
1783 case 3: op = EOpConstructMat3; break;
1784 case 4: op = EOpConstructMat3x4; break;
1788 switch(publicType.getRows())
1790 case 2: op = EOpConstructMat4x2; break;
1791 case 3: op = EOpConstructMat4x3; break;
1792 case 4: op = EOpConstructMat4; break;
1799 switch(publicType.getNominalSize())
1801 case 1: op = EOpConstructFloat; break;
1802 case 2: op = EOpConstructVec2; break;
1803 case 3: op = EOpConstructVec3; break;
1804 case 4: op = EOpConstructVec4; break;
1810 switch(publicType.getNominalSize())
1812 case 1: op = EOpConstructInt; break;
1813 case 2: op = EOpConstructIVec2; break;
1814 case 3: op = EOpConstructIVec3; break;
1815 case 4: op = EOpConstructIVec4; break;
1820 switch(publicType.getNominalSize())
1822 case 1: op = EOpConstructUInt; break;
1823 case 2: op = EOpConstructUVec2; break;
1824 case 3: op = EOpConstructUVec3; break;
1825 case 4: op = EOpConstructUVec4; break;
1830 switch(publicType.getNominalSize())
1832 case 1: op = EOpConstructBool; break;
1833 case 2: op = EOpConstructBVec2; break;
1834 case 3: op = EOpConstructBVec3; break;
1835 case 4: op = EOpConstructBVec4; break;
1844 error(publicType.line, "cannot construct this type", getBasicString(publicType.type));
1846 publicType.type = EbtFloat;
1847 op = EOpConstructFloat;
1852 TType type(publicType);
1853 return new TFunction(&tempString, type, op);
1856 // This function is used to test for the correctness of the parameters passed to various constructor functions
1857 // and also convert them to the right datatype if it is allowed and required.
1859 // Returns 0 for an error or the constructed node (aggregate or typed) for no error.
1861 TIntermTyped* TParseContext::addConstructor(TIntermNode* arguments, const TType* type, TOperator op, TFunction* fnCall, const TSourceLoc &line)
1863 TIntermAggregate *aggregateArguments = arguments->getAsAggregate();
1865 if(!aggregateArguments)
1867 aggregateArguments = new TIntermAggregate;
1868 aggregateArguments->getSequence().push_back(arguments);
1871 if(op == EOpConstructStruct)
1873 const TFieldList &fields = type->getStruct()->fields();
1874 TIntermSequence &args = aggregateArguments->getSequence();
1876 for(size_t i = 0; i < fields.size(); i++)
1878 if(args[i]->getAsTyped()->getType() != *fields[i]->type())
1880 error(line, "Structure constructor arguments do not match structure fields", "Error");
1888 // Turn the argument list itself into a constructor
1889 TIntermTyped *constructor = intermediate.setAggregateOperator(aggregateArguments, op, line);
1890 TIntermTyped *constConstructor = foldConstConstructor(constructor->getAsAggregate(), *type);
1891 if(constConstructor)
1893 return constConstructor;
1899 TIntermTyped* TParseContext::foldConstConstructor(TIntermAggregate* aggrNode, const TType& type)
1901 bool canBeFolded = areAllChildConst(aggrNode);
1902 aggrNode->setType(type);
1904 bool returnVal = false;
1905 ConstantUnion* unionArray = new ConstantUnion[type.getObjectSize()];
1906 if (aggrNode->getSequence().size() == 1) {
1907 returnVal = intermediate.parseConstTree(aggrNode->getLine(), aggrNode, unionArray, aggrNode->getOp(), type, true);
1910 returnVal = intermediate.parseConstTree(aggrNode->getLine(), aggrNode, unionArray, aggrNode->getOp(), type);
1915 return intermediate.addConstantUnion(unionArray, type, aggrNode->getLine());
1922 // This function returns the tree representation for the vector field(s) being accessed from contant vector.
1923 // If only one component of vector is accessed (v.x or v[0] where v is a contant vector), then a contant node is
1924 // returned, else an aggregate node is returned (for v.xy). The input to this function could either be the symbol
1925 // node or it could be the intermediate tree representation of accessing fields in a constant structure or column of
1926 // a constant matrix.
1928 TIntermTyped* TParseContext::addConstVectorNode(TVectorFields& fields, TIntermTyped* node, const TSourceLoc &line)
1930 TIntermTyped* typedNode;
1931 TIntermConstantUnion* tempConstantNode = node->getAsConstantUnion();
1933 ConstantUnion *unionArray;
1934 if (tempConstantNode) {
1935 unionArray = tempConstantNode->getUnionArrayPointer();
1940 } else { // The node has to be either a symbol node or an aggregate node or a tempConstant node, else, its an error
1941 error(line, "Cannot offset into the vector", "Error");
1947 ConstantUnion* constArray = new ConstantUnion[fields.num];
1949 for (int i = 0; i < fields.num; i++) {
1950 if (fields.offsets[i] >= node->getType().getObjectSize()) {
1951 std::stringstream extraInfoStream;
1952 extraInfoStream << "vector field selection out of range '" << fields.offsets[i] << "'";
1953 std::string extraInfo = extraInfoStream.str();
1954 error(line, "", "[", extraInfo.c_str());
1956 fields.offsets[i] = 0;
1959 constArray[i] = unionArray[fields.offsets[i]];
1962 typedNode = intermediate.addConstantUnion(constArray, node->getType(), line);
1967 // This function returns the column being accessed from a constant matrix. The values are retrieved from
1968 // the symbol table and parse-tree is built for a vector (each column of a matrix is a vector). The input
1969 // to the function could either be a symbol node (m[0] where m is a constant matrix)that represents a
1970 // constant matrix or it could be the tree representation of the constant matrix (s.m1[0] where s is a constant structure)
1972 TIntermTyped* TParseContext::addConstMatrixNode(int index, TIntermTyped* node, const TSourceLoc &line)
1974 TIntermTyped* typedNode;
1975 TIntermConstantUnion* tempConstantNode = node->getAsConstantUnion();
1977 if (index >= node->getType().getNominalSize()) {
1978 std::stringstream extraInfoStream;
1979 extraInfoStream << "matrix field selection out of range '" << index << "'";
1980 std::string extraInfo = extraInfoStream.str();
1981 error(line, "", "[", extraInfo.c_str());
1986 if (tempConstantNode) {
1987 ConstantUnion* unionArray = tempConstantNode->getUnionArrayPointer();
1988 int size = tempConstantNode->getType().getNominalSize();
1989 typedNode = intermediate.addConstantUnion(&unionArray[size*index], tempConstantNode->getType(), line);
1991 error(line, "Cannot offset into the matrix", "Error");
2002 // This function returns an element of an array accessed from a constant array. The values are retrieved from
2003 // the symbol table and parse-tree is built for the type of the element. The input
2004 // to the function could either be a symbol node (a[0] where a is a constant array)that represents a
2005 // constant array or it could be the tree representation of the constant array (s.a1[0] where s is a constant structure)
2007 TIntermTyped* TParseContext::addConstArrayNode(int index, TIntermTyped* node, const TSourceLoc &line)
2009 TIntermTyped* typedNode;
2010 TIntermConstantUnion* tempConstantNode = node->getAsConstantUnion();
2011 TType arrayElementType = node->getType();
2012 arrayElementType.clearArrayness();
2014 if (index >= node->getType().getArraySize()) {
2015 std::stringstream extraInfoStream;
2016 extraInfoStream << "array field selection out of range '" << index << "'";
2017 std::string extraInfo = extraInfoStream.str();
2018 error(line, "", "[", extraInfo.c_str());
2023 int arrayElementSize = arrayElementType.getObjectSize();
2025 if (tempConstantNode) {
2026 ConstantUnion* unionArray = tempConstantNode->getUnionArrayPointer();
2027 typedNode = intermediate.addConstantUnion(&unionArray[arrayElementSize * index], tempConstantNode->getType(), line);
2029 error(line, "Cannot offset into the array", "Error");
2040 // This function returns the value of a particular field inside a constant structure from the symbol table.
2041 // If there is an embedded/nested struct, it appropriately calls addConstStructNested or addConstStructFromAggr
2042 // function and returns the parse-tree with the values of the embedded/nested struct.
2044 TIntermTyped* TParseContext::addConstStruct(const TString& identifier, TIntermTyped* node, const TSourceLoc &line)
2046 const TFieldList &fields = node->getType().getStruct()->fields();
2047 TIntermTyped *typedNode;
2048 int instanceSize = 0;
2049 unsigned int index = 0;
2050 TIntermConstantUnion *tempConstantNode = node->getAsConstantUnion();
2052 for ( index = 0; index < fields.size(); ++index) {
2053 if (fields[index]->name() == identifier) {
2056 instanceSize += fields[index]->type()->getObjectSize();
2060 if (tempConstantNode) {
2061 ConstantUnion* constArray = tempConstantNode->getUnionArrayPointer();
2063 typedNode = intermediate.addConstantUnion(constArray+instanceSize, tempConstantNode->getType(), line); // type will be changed in the calling function
2065 error(line, "Cannot offset into the structure", "Error");
2075 // Interface/uniform blocks
2077 TIntermAggregate* TParseContext::addInterfaceBlock(const TPublicType& typeQualifier, const TSourceLoc& nameLine, const TString& blockName, TFieldList* fieldList,
2078 const TString* instanceName, const TSourceLoc& instanceLine, TIntermTyped* arrayIndex, const TSourceLoc& arrayIndexLine)
2080 if(reservedErrorCheck(nameLine, blockName))
2083 if(typeQualifier.qualifier != EvqUniform)
2085 error(typeQualifier.line, "invalid qualifier:", getQualifierString(typeQualifier.qualifier), "interface blocks must be uniform");
2089 TLayoutQualifier blockLayoutQualifier = typeQualifier.layoutQualifier;
2090 if(layoutLocationErrorCheck(typeQualifier.line, blockLayoutQualifier))
2095 if(blockLayoutQualifier.matrixPacking == EmpUnspecified)
2097 blockLayoutQualifier.matrixPacking = mDefaultMatrixPacking;
2100 if(blockLayoutQualifier.blockStorage == EbsUnspecified)
2102 blockLayoutQualifier.blockStorage = mDefaultBlockStorage;
2105 TSymbol* blockNameSymbol = new TSymbol(&blockName);
2106 if(!symbolTable.declare(*blockNameSymbol)) {
2107 error(nameLine, "redefinition", blockName.c_str(), "interface block name");
2111 // check for sampler types and apply layout qualifiers
2112 for(size_t memberIndex = 0; memberIndex < fieldList->size(); ++memberIndex) {
2113 TField* field = (*fieldList)[memberIndex];
2114 TType* fieldType = field->type();
2115 if(IsSampler(fieldType->getBasicType())) {
2116 error(field->line(), "unsupported type", fieldType->getBasicString(), "sampler types are not allowed in interface blocks");
2120 const TQualifier qualifier = fieldType->getQualifier();
2127 error(field->line(), "invalid qualifier on interface block member", getQualifierString(qualifier));
2132 // check layout qualifiers
2133 TLayoutQualifier fieldLayoutQualifier = fieldType->getLayoutQualifier();
2134 if(layoutLocationErrorCheck(field->line(), fieldLayoutQualifier))
2139 if(fieldLayoutQualifier.blockStorage != EbsUnspecified)
2141 error(field->line(), "invalid layout qualifier:", getBlockStorageString(fieldLayoutQualifier.blockStorage), "cannot be used here");
2145 if(fieldLayoutQualifier.matrixPacking == EmpUnspecified)
2147 fieldLayoutQualifier.matrixPacking = blockLayoutQualifier.matrixPacking;
2149 else if(!fieldType->isMatrix())
2151 error(field->line(), "invalid layout qualifier:", getMatrixPackingString(fieldLayoutQualifier.matrixPacking), "can only be used on matrix types");
2155 fieldType->setLayoutQualifier(fieldLayoutQualifier);
2160 if(arrayIndex != NULL)
2162 if(arraySizeErrorCheck(arrayIndexLine, arrayIndex, arraySize))
2166 TInterfaceBlock* interfaceBlock = new TInterfaceBlock(&blockName, fieldList, instanceName, arraySize, blockLayoutQualifier);
2167 TType interfaceBlockType(interfaceBlock, typeQualifier.qualifier, blockLayoutQualifier, arraySize);
2169 TString symbolName = "";
2174 // define symbols for the members of the interface block
2175 for(size_t memberIndex = 0; memberIndex < fieldList->size(); ++memberIndex)
2177 TField* field = (*fieldList)[memberIndex];
2178 TType* fieldType = field->type();
2180 // set parent pointer of the field variable
2181 fieldType->setInterfaceBlock(interfaceBlock);
2183 TVariable* fieldVariable = new TVariable(&field->name(), *fieldType);
2184 fieldVariable->setQualifier(typeQualifier.qualifier);
2186 if(!symbolTable.declare(*fieldVariable)) {
2187 error(field->line(), "redefinition", field->name().c_str(), "interface block member name");
2194 // add a symbol for this interface block
2195 TVariable* instanceTypeDef = new TVariable(instanceName, interfaceBlockType, false);
2196 instanceTypeDef->setQualifier(typeQualifier.qualifier);
2198 if(!symbolTable.declare(*instanceTypeDef)) {
2199 error(instanceLine, "redefinition", instanceName->c_str(), "interface block instance name");
2203 symbolId = instanceTypeDef->getUniqueId();
2204 symbolName = instanceTypeDef->getName();
2207 TIntermAggregate *aggregate = intermediate.makeAggregate(intermediate.addSymbol(symbolId, symbolName, interfaceBlockType, typeQualifier.line), nameLine);
2208 aggregate->setOp(EOpDeclaration);
2210 exitStructDeclaration();
2215 // Parse an array index expression
2217 TIntermTyped *TParseContext::addIndexExpression(TIntermTyped *baseExpression, const TSourceLoc &location, TIntermTyped *indexExpression)
2219 TIntermTyped *indexedExpression = NULL;
2221 if(!baseExpression->isArray() && !baseExpression->isMatrix() && !baseExpression->isVector())
2223 if(baseExpression->getAsSymbolNode())
2225 error(location, " left of '[' is not of type array, matrix, or vector ",
2226 baseExpression->getAsSymbolNode()->getSymbol().c_str());
2230 error(location, " left of '[' is not of type array, matrix, or vector ", "expression");
2235 TIntermConstantUnion *indexConstantUnion = indexExpression->getAsConstantUnion();
2237 if(indexExpression->getQualifier() == EvqConstExpr && indexConstantUnion)
2239 int index = indexConstantUnion->getIConst(0);
2242 std::stringstream infoStream;
2243 infoStream << index;
2244 std::string info = infoStream.str();
2245 error(location, "negative index", info.c_str());
2249 if(baseExpression->getType().getQualifier() == EvqConstExpr)
2251 if(baseExpression->isArray())
2253 // constant folding for arrays
2254 indexedExpression = addConstArrayNode(index, baseExpression, location);
2256 else if(baseExpression->isVector())
2258 // constant folding for vectors
2259 TVectorFields fields;
2261 fields.offsets[0] = index; // need to do it this way because v.xy sends fields integer array
2262 indexedExpression = addConstVectorNode(fields, baseExpression, location);
2264 else if(baseExpression->isMatrix())
2266 // constant folding for matrices
2267 indexedExpression = addConstMatrixNode(index, baseExpression, location);
2274 if(baseExpression->isArray())
2276 if(index >= baseExpression->getType().getArraySize())
2278 std::stringstream extraInfoStream;
2279 extraInfoStream << "array index out of range '" << index << "'";
2280 std::string extraInfo = extraInfoStream.str();
2281 error(location, "", "[", extraInfo.c_str());
2283 safeIndex = baseExpression->getType().getArraySize() - 1;
2286 else if((baseExpression->isVector() || baseExpression->isMatrix()) &&
2287 baseExpression->getType().getNominalSize() <= index)
2289 std::stringstream extraInfoStream;
2290 extraInfoStream << "field selection out of range '" << index << "'";
2291 std::string extraInfo = extraInfoStream.str();
2292 error(location, "", "[", extraInfo.c_str());
2294 safeIndex = baseExpression->getType().getNominalSize() - 1;
2297 // Don't modify the data of the previous constant union, because it can point
2298 // to builtins, like gl_MaxDrawBuffers. Instead use a new sanitized object.
2301 ConstantUnion *safeConstantUnion = new ConstantUnion();
2302 safeConstantUnion->setIConst(safeIndex);
2303 indexConstantUnion->replaceConstantUnion(safeConstantUnion);
2306 indexedExpression = intermediate.addIndex(EOpIndexDirect, baseExpression, indexExpression, location);
2311 if(baseExpression->isInterfaceBlock())
2314 "[", "array indexes for interface blocks arrays must be constant integral expressions");
2317 else if(baseExpression->getQualifier() == EvqFragmentOut)
2319 error(location, "", "[", "array indexes for fragment outputs must be constant integral expressions");
2323 indexedExpression = intermediate.addIndex(EOpIndexIndirect, baseExpression, indexExpression, location);
2326 if(indexedExpression == 0)
2328 ConstantUnion *unionArray = new ConstantUnion[1];
2329 unionArray->setFConst(0.0f);
2330 indexedExpression = intermediate.addConstantUnion(unionArray, TType(EbtFloat, EbpHigh, EvqConstExpr), location);
2332 else if(baseExpression->isArray())
2334 const TType &baseType = baseExpression->getType();
2335 if(baseType.getStruct())
2337 TType copyOfType(baseType.getStruct());
2338 indexedExpression->setType(copyOfType);
2340 else if(baseType.isInterfaceBlock())
2342 TType copyOfType(baseType.getInterfaceBlock(), EvqTemporary, baseType.getLayoutQualifier(), 0);
2343 indexedExpression->setType(copyOfType);
2347 indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision(),
2348 EvqTemporary, static_cast<unsigned char>(baseExpression->getNominalSize()),
2349 static_cast<unsigned char>(baseExpression->getSecondarySize())));
2352 if(baseExpression->getType().getQualifier() == EvqConstExpr)
2354 indexedExpression->getTypePointer()->setQualifier(EvqConstExpr);
2357 else if(baseExpression->isMatrix())
2359 TQualifier qualifier = baseExpression->getType().getQualifier() == EvqConstExpr ? EvqConstExpr : EvqTemporary;
2360 indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision(),
2361 qualifier, static_cast<unsigned char>(baseExpression->getSecondarySize())));
2363 else if(baseExpression->isVector())
2365 TQualifier qualifier = baseExpression->getType().getQualifier() == EvqConstExpr ? EvqConstExpr : EvqTemporary;
2366 indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision(), qualifier));
2370 indexedExpression->setType(baseExpression->getType());
2373 return indexedExpression;
2376 TIntermTyped *TParseContext::addFieldSelectionExpression(TIntermTyped *baseExpression, const TSourceLoc &dotLocation,
2377 const TString &fieldString, const TSourceLoc &fieldLocation)
2379 TIntermTyped *indexedExpression = NULL;
2381 if(baseExpression->isArray())
2383 error(fieldLocation, "cannot apply dot operator to an array", ".");
2387 if(baseExpression->isVector())
2389 TVectorFields fields;
2390 if(!parseVectorFields(fieldString, baseExpression->getNominalSize(), fields, fieldLocation))
2393 fields.offsets[0] = 0;
2397 if(baseExpression->getType().getQualifier() == EvqConstExpr)
2399 // constant folding for vector fields
2400 indexedExpression = addConstVectorNode(fields, baseExpression, fieldLocation);
2401 if(indexedExpression == 0)
2404 indexedExpression = baseExpression;
2408 indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision(),
2409 EvqConstExpr, (unsigned char)(fieldString).size()));
2414 TString vectorString = fieldString;
2415 TIntermTyped *index = intermediate.addSwizzle(fields, fieldLocation);
2416 indexedExpression = intermediate.addIndex(EOpVectorSwizzle, baseExpression, index, dotLocation);
2417 indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision(),
2418 EvqTemporary, (unsigned char)vectorString.size()));
2421 else if(baseExpression->isMatrix())
2423 TMatrixFields fields;
2424 if(!parseMatrixFields(fieldString, baseExpression->getNominalSize(), baseExpression->getSecondarySize(), fields, fieldLocation))
2426 fields.wholeRow = false;
2427 fields.wholeCol = false;
2433 if(fields.wholeRow || fields.wholeCol)
2435 error(dotLocation, " non-scalar fields not implemented yet", ".");
2437 ConstantUnion *unionArray = new ConstantUnion[1];
2438 unionArray->setIConst(0);
2439 TIntermTyped *index = intermediate.addConstantUnion(unionArray, TType(EbtInt, EbpUndefined, EvqConstExpr),
2441 indexedExpression = intermediate.addIndex(EOpIndexDirect, baseExpression, index, dotLocation);
2442 indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision(),
2443 EvqTemporary, static_cast<unsigned char>(baseExpression->getNominalSize()),
2444 static_cast<unsigned char>(baseExpression->getSecondarySize())));
2448 ConstantUnion *unionArray = new ConstantUnion[1];
2449 unionArray->setIConst(fields.col * baseExpression->getSecondarySize() + fields.row);
2450 TIntermTyped *index = intermediate.addConstantUnion(unionArray, TType(EbtInt, EbpUndefined, EvqConstExpr),
2452 indexedExpression = intermediate.addIndex(EOpIndexDirect, baseExpression, index, dotLocation);
2453 indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision()));
2456 else if(baseExpression->getBasicType() == EbtStruct)
2458 bool fieldFound = false;
2459 const TFieldList &fields = baseExpression->getType().getStruct()->fields();
2462 error(dotLocation, "structure has no fields", "Internal Error");
2464 indexedExpression = baseExpression;
2469 for(i = 0; i < fields.size(); ++i)
2471 if(fields[i]->name() == fieldString)
2479 if(baseExpression->getType().getQualifier() == EvqConstExpr)
2481 indexedExpression = addConstStruct(fieldString, baseExpression, dotLocation);
2482 if(indexedExpression == 0)
2485 indexedExpression = baseExpression;
2489 indexedExpression->setType(*fields[i]->type());
2490 // change the qualifier of the return type, not of the structure field
2491 // as the structure definition is shared between various structures.
2492 indexedExpression->getTypePointer()->setQualifier(EvqConstExpr);
2497 ConstantUnion *unionArray = new ConstantUnion[1];
2498 unionArray->setIConst(i);
2499 TIntermTyped *index = intermediate.addConstantUnion(unionArray, *fields[i]->type(), fieldLocation);
2500 indexedExpression = intermediate.addIndex(EOpIndexDirectStruct, baseExpression, index, dotLocation);
2501 indexedExpression->setType(*fields[i]->type());
2506 error(dotLocation, " no such field in structure", fieldString.c_str());
2508 indexedExpression = baseExpression;
2512 else if(baseExpression->isInterfaceBlock())
2514 bool fieldFound = false;
2515 const TFieldList &fields = baseExpression->getType().getInterfaceBlock()->fields();
2518 error(dotLocation, "interface block has no fields", "Internal Error");
2520 indexedExpression = baseExpression;
2525 for(i = 0; i < fields.size(); ++i)
2527 if(fields[i]->name() == fieldString)
2535 ConstantUnion *unionArray = new ConstantUnion[1];
2536 unionArray->setIConst(i);
2537 TIntermTyped *index = intermediate.addConstantUnion(unionArray, *fields[i]->type(), fieldLocation);
2538 indexedExpression = intermediate.addIndex(EOpIndexDirectInterfaceBlock, baseExpression, index,
2540 indexedExpression->setType(*fields[i]->type());
2544 error(dotLocation, " no such field in interface block", fieldString.c_str());
2546 indexedExpression = baseExpression;
2552 if(mShaderVersion < 300)
2554 error(dotLocation, " field selection requires structure, vector, or matrix on left hand side",
2555 fieldString.c_str());
2560 " field selection requires structure, vector, matrix, or interface block on left hand side",
2561 fieldString.c_str());
2564 indexedExpression = baseExpression;
2567 return indexedExpression;
2570 TLayoutQualifier TParseContext::parseLayoutQualifier(const TString &qualifierType, const TSourceLoc& qualifierTypeLine)
2572 TLayoutQualifier qualifier;
2574 qualifier.location = -1;
2575 qualifier.matrixPacking = EmpUnspecified;
2576 qualifier.blockStorage = EbsUnspecified;
2578 if(qualifierType == "shared")
2580 qualifier.blockStorage = EbsShared;
2582 else if(qualifierType == "packed")
2584 qualifier.blockStorage = EbsPacked;
2586 else if(qualifierType == "std140")
2588 qualifier.blockStorage = EbsStd140;
2590 else if(qualifierType == "row_major")
2592 qualifier.matrixPacking = EmpRowMajor;
2594 else if(qualifierType == "column_major")
2596 qualifier.matrixPacking = EmpColumnMajor;
2598 else if(qualifierType == "location")
2600 error(qualifierTypeLine, "invalid layout qualifier", qualifierType.c_str(), "location requires an argument");
2605 error(qualifierTypeLine, "invalid layout qualifier", qualifierType.c_str());
2612 TLayoutQualifier TParseContext::parseLayoutQualifier(const TString &qualifierType, const TSourceLoc& qualifierTypeLine, const TString &intValueString, int intValue, const TSourceLoc& intValueLine)
2614 TLayoutQualifier qualifier;
2616 qualifier.location = -1;
2617 qualifier.matrixPacking = EmpUnspecified;
2618 qualifier.blockStorage = EbsUnspecified;
2620 if (qualifierType != "location")
2622 error(qualifierTypeLine, "invalid layout qualifier", qualifierType.c_str(), "only location may have arguments");
2627 // must check that location is non-negative
2630 error(intValueLine, "out of range:", intValueString.c_str(), "location must be non-negative");
2635 qualifier.location = intValue;
2642 TLayoutQualifier TParseContext::joinLayoutQualifiers(TLayoutQualifier leftQualifier, TLayoutQualifier rightQualifier)
2644 TLayoutQualifier joinedQualifier = leftQualifier;
2646 if (rightQualifier.location != -1)
2648 joinedQualifier.location = rightQualifier.location;
2650 if(rightQualifier.matrixPacking != EmpUnspecified)
2652 joinedQualifier.matrixPacking = rightQualifier.matrixPacking;
2654 if(rightQualifier.blockStorage != EbsUnspecified)
2656 joinedQualifier.blockStorage = rightQualifier.blockStorage;
2659 return joinedQualifier;
2663 TPublicType TParseContext::joinInterpolationQualifiers(const TSourceLoc &interpolationLoc, TQualifier interpolationQualifier,
2664 const TSourceLoc &storageLoc, TQualifier storageQualifier)
2666 TQualifier mergedQualifier = EvqSmoothIn;
2668 if(storageQualifier == EvqFragmentIn) {
2669 if(interpolationQualifier == EvqSmooth)
2670 mergedQualifier = EvqSmoothIn;
2671 else if(interpolationQualifier == EvqFlat)
2672 mergedQualifier = EvqFlatIn;
2673 else UNREACHABLE(interpolationQualifier);
2675 else if(storageQualifier == EvqCentroidIn) {
2676 if(interpolationQualifier == EvqSmooth)
2677 mergedQualifier = EvqCentroidIn;
2678 else if(interpolationQualifier == EvqFlat)
2679 mergedQualifier = EvqFlatIn;
2680 else UNREACHABLE(interpolationQualifier);
2682 else if(storageQualifier == EvqVertexOut) {
2683 if(interpolationQualifier == EvqSmooth)
2684 mergedQualifier = EvqSmoothOut;
2685 else if(interpolationQualifier == EvqFlat)
2686 mergedQualifier = EvqFlatOut;
2687 else UNREACHABLE(interpolationQualifier);
2689 else if(storageQualifier == EvqCentroidOut) {
2690 if(interpolationQualifier == EvqSmooth)
2691 mergedQualifier = EvqCentroidOut;
2692 else if(interpolationQualifier == EvqFlat)
2693 mergedQualifier = EvqFlatOut;
2694 else UNREACHABLE(interpolationQualifier);
2697 error(interpolationLoc, "interpolation qualifier requires a fragment 'in' or vertex 'out' storage qualifier", getQualifierString(interpolationQualifier));
2700 mergedQualifier = storageQualifier;
2704 type.setBasic(EbtVoid, mergedQualifier, storageLoc);
2708 TFieldList *TParseContext::addStructDeclaratorList(const TPublicType &typeSpecifier, TFieldList *fieldList)
2710 if(voidErrorCheck(typeSpecifier.line, (*fieldList)[0]->name(), typeSpecifier.type))
2715 for(unsigned int i = 0; i < fieldList->size(); ++i)
2718 // Careful not to replace already known aspects of type, like array-ness
2720 TType *type = (*fieldList)[i]->type();
2721 type->setBasicType(typeSpecifier.type);
2722 type->setNominalSize(typeSpecifier.primarySize);
2723 type->setSecondarySize(typeSpecifier.secondarySize);
2724 type->setPrecision(typeSpecifier.precision);
2725 type->setQualifier(typeSpecifier.qualifier);
2726 type->setLayoutQualifier(typeSpecifier.layoutQualifier);
2728 // don't allow arrays of arrays
2731 if(arrayTypeErrorCheck(typeSpecifier.line, typeSpecifier))
2734 if(typeSpecifier.array)
2735 type->setArraySize(typeSpecifier.arraySize);
2736 if(typeSpecifier.userDef)
2738 type->setStruct(typeSpecifier.userDef->getStruct());
2741 if(structNestingErrorCheck(typeSpecifier.line, *(*fieldList)[i]))
2750 TPublicType TParseContext::addStructure(const TSourceLoc &structLine, const TSourceLoc &nameLine,
2751 const TString *structName, TFieldList *fieldList)
2753 TStructure *structure = new TStructure(structName, fieldList);
2754 TType *structureType = new TType(structure);
2756 // Store a bool in the struct if we're at global scope, to allow us to
2757 // skip the local struct scoping workaround in HLSL.
2758 structure->setUniqueId(TSymbolTableLevel::nextUniqueId());
2759 structure->setAtGlobalScope(symbolTable.atGlobalLevel());
2761 if(!structName->empty())
2763 if(reservedErrorCheck(nameLine, *structName))
2767 TVariable *userTypeDef = new TVariable(structName, *structureType, true);
2768 if(!symbolTable.declare(*userTypeDef))
2770 error(nameLine, "redefinition", structName->c_str(), "struct");
2775 // ensure we do not specify any storage qualifiers on the struct members
2776 for(unsigned int typeListIndex = 0; typeListIndex < fieldList->size(); typeListIndex++)
2778 const TField &field = *(*fieldList)[typeListIndex];
2779 const TQualifier qualifier = field.type()->getQualifier();
2786 error(field.line(), "invalid qualifier on struct member", getQualifierString(qualifier));
2792 TPublicType publicType;
2793 publicType.setBasic(EbtStruct, EvqTemporary, structLine);
2794 publicType.userDef = structureType;
2795 exitStructDeclaration();
2800 bool TParseContext::enterStructDeclaration(const TSourceLoc &line, const TString& identifier)
2802 ++mStructNestingLevel;
2804 // Embedded structure definitions are not supported per GLSL ES spec.
2805 // They aren't allowed in GLSL either, but we need to detect this here
2806 // so we don't rely on the GLSL compiler to catch it.
2807 if (mStructNestingLevel > 1) {
2808 error(line, "", "Embedded struct definitions are not allowed");
2815 void TParseContext::exitStructDeclaration()
2817 --mStructNestingLevel;
2820 bool TParseContext::structNestingErrorCheck(const TSourceLoc &line, const TField &field)
2822 static const int kWebGLMaxStructNesting = 4;
2824 if(field.type()->getBasicType() != EbtStruct)
2829 // We're already inside a structure definition at this point, so add
2830 // one to the field's struct nesting.
2831 if(1 + field.type()->getDeepestStructNesting() > kWebGLMaxStructNesting)
2833 std::stringstream reasonStream;
2834 reasonStream << "Reference of struct type "
2835 << field.type()->getStruct()->name().c_str()
2836 << " exceeds maximum allowed nesting level of "
2837 << kWebGLMaxStructNesting;
2838 std::string reason = reasonStream.str();
2839 error(line, reason.c_str(), field.name().c_str(), "");
2846 TIntermTyped *TParseContext::createUnaryMath(TOperator op, TIntermTyped *child, const TSourceLoc &loc, const TType *funcReturnType)
2848 if(child == nullptr)
2856 if(child->getBasicType() != EbtBool ||
2857 child->isMatrix() ||
2865 if((child->getBasicType() != EbtInt && child->getBasicType() != EbtUInt) ||
2866 child->isMatrix() ||
2872 case EOpPostIncrement:
2873 case EOpPreIncrement:
2874 case EOpPostDecrement:
2875 case EOpPreDecrement:
2877 if(child->getBasicType() == EbtStruct ||
2878 child->getBasicType() == EbtBool ||
2883 // Operators for built-ins are already type checked against their prototype.
2888 return intermediate.addUnaryMath(op, child, loc); // FIXME , funcReturnType);
2891 TIntermTyped *TParseContext::addUnaryMath(TOperator op, TIntermTyped *child, const TSourceLoc &loc)
2893 TIntermTyped *node = createUnaryMath(op, child, loc, nullptr);
2896 unaryOpError(loc, getOperatorString(op), child->getCompleteString());
2903 TIntermTyped *TParseContext::addUnaryMathLValue(TOperator op, TIntermTyped *child, const TSourceLoc &loc)
2905 if(lValueErrorCheck(loc, getOperatorString(op), child))
2907 return addUnaryMath(op, child, loc);
2910 bool TParseContext::binaryOpCommonCheck(TOperator op, TIntermTyped *left, TIntermTyped *right, const TSourceLoc &loc)
2912 if(left->isArray() || right->isArray())
2914 if(mShaderVersion < 300)
2916 error(loc, "Invalid operation for arrays", getOperatorString(op));
2920 if(left->isArray() != right->isArray())
2922 error(loc, "array / non-array mismatch", getOperatorString(op));
2934 error(loc, "Invalid operation for arrays", getOperatorString(op));
2937 // At this point, size of implicitly sized arrays should be resolved.
2938 if(left->getArraySize() != right->getArraySize())
2940 error(loc, "array size mismatch", getOperatorString(op));
2945 // Check ops which require integer / ivec parameters
2946 bool isBitShift = false;
2949 case EOpBitShiftLeft:
2950 case EOpBitShiftRight:
2951 case EOpBitShiftLeftAssign:
2952 case EOpBitShiftRightAssign:
2953 // Unsigned can be bit-shifted by signed and vice versa, but we need to
2954 // check that the basic type is an integer type.
2956 if(!IsInteger(left->getBasicType()) || !IsInteger(right->getBasicType()))
2964 case EOpBitwiseAndAssign:
2965 case EOpBitwiseXorAssign:
2966 case EOpBitwiseOrAssign:
2967 // It is enough to check the type of only one operand, since later it
2968 // is checked that the operand types match.
2969 if(!IsInteger(left->getBasicType()))
2978 // GLSL ES 1.00 and 3.00 do not support implicit type casting.
2979 // So the basic type should usually match.
2980 if(!isBitShift && left->getBasicType() != right->getBasicType())
2985 // Check that type sizes match exactly on ops that require that.
2986 // Also check restrictions for structs that contain arrays or samplers.
2993 // ESSL 1.00 sections 5.7, 5.8, 5.9
2994 if(mShaderVersion < 300 && left->getType().isStructureContainingArrays())
2996 error(loc, "undefined operation for structs containing arrays", getOperatorString(op));
2999 // Samplers as l-values are disallowed also in ESSL 3.00, see section 4.1.7,
3000 // we interpret the spec so that this extends to structs containing samplers,
3001 // similarly to ESSL 1.00 spec.
3002 if((mShaderVersion < 300 || op == EOpAssign || op == EOpInitialize) &&
3003 left->getType().isStructureContainingSamplers())
3005 error(loc, "undefined operation for structs containing samplers", getOperatorString(op));
3009 case EOpGreaterThan:
3010 case EOpLessThanEqual:
3011 case EOpGreaterThanEqual:
3012 if((left->getNominalSize() != right->getNominalSize()) ||
3013 (left->getSecondarySize() != right->getSecondarySize()))
3024 TIntermSwitch *TParseContext::addSwitch(TIntermTyped *init, TIntermAggregate *statementList, const TSourceLoc &loc)
3026 TBasicType switchType = init->getBasicType();
3027 if((switchType != EbtInt && switchType != EbtUInt) ||
3032 error(init->getLine(), "init-expression in a switch statement must be a scalar integer", "switch");
3039 if(!ValidateSwitch::validate(switchType, this, statementList, loc))
3046 TIntermSwitch *node = intermediate.addSwitch(init, statementList, loc);
3049 error(loc, "erroneous switch statement", "switch");
3056 TIntermCase *TParseContext::addCase(TIntermTyped *condition, const TSourceLoc &loc)
3058 if(mSwitchNestingLevel == 0)
3060 error(loc, "case labels need to be inside switch statements", "case");
3064 if(condition == nullptr)
3066 error(loc, "case label must have a condition", "case");
3070 if((condition->getBasicType() != EbtInt && condition->getBasicType() != EbtUInt) ||
3071 condition->isMatrix() ||
3072 condition->isArray() ||
3073 condition->isVector())
3075 error(condition->getLine(), "case label must be a scalar integer", "case");
3078 TIntermConstantUnion *conditionConst = condition->getAsConstantUnion();
3079 if(conditionConst == nullptr)
3081 error(condition->getLine(), "case label must be constant", "case");
3084 TIntermCase *node = intermediate.addCase(condition, loc);
3087 error(loc, "erroneous case statement", "case");
3094 TIntermCase *TParseContext::addDefault(const TSourceLoc &loc)
3096 if(mSwitchNestingLevel == 0)
3098 error(loc, "default labels need to be inside switch statements", "default");
3102 TIntermCase *node = intermediate.addCase(nullptr, loc);
3105 error(loc, "erroneous default statement", "default");
3111 TIntermTyped *TParseContext::createAssign(TOperator op, TIntermTyped *left, TIntermTyped *right, const TSourceLoc &loc)
3113 if(binaryOpCommonCheck(op, left, right, loc))
3115 return intermediate.addAssign(op, left, right, loc);
3120 TIntermTyped *TParseContext::addAssign(TOperator op, TIntermTyped *left, TIntermTyped *right, const TSourceLoc &loc)
3122 TIntermTyped *node = createAssign(op, left, right, loc);
3125 assignError(loc, "assign", left->getCompleteString(), right->getCompleteString());
3132 TIntermTyped *TParseContext::addBinaryMathInternal(TOperator op, TIntermTyped *left, TIntermTyped *right,
3133 const TSourceLoc &loc)
3135 if(!binaryOpCommonCheck(op, left, right, loc))
3144 case EOpGreaterThan:
3145 case EOpLessThanEqual:
3146 case EOpGreaterThanEqual:
3147 ASSERT(!left->isArray() && !right->isArray());
3148 if(left->isMatrix() || left->isVector() ||
3149 left->getBasicType() == EbtStruct)
3157 ASSERT(!left->isArray() && !right->isArray());
3158 if(left->getBasicType() != EbtBool ||
3159 left->isMatrix() || left->isVector())
3168 ASSERT(!left->isArray() && !right->isArray());
3169 if(left->getBasicType() == EbtStruct || left->getBasicType() == EbtBool)
3175 ASSERT(!left->isArray() && !right->isArray());
3176 // Note that this is only for the % operator, not for mod()
3177 if(left->getBasicType() == EbtStruct || left->getBasicType() == EbtBool || left->getBasicType() == EbtFloat)
3182 // Note that for bitwise ops, type checking is done in promote() to
3183 // share code between ops and compound assignment
3188 return intermediate.addBinaryMath(op, left, right, loc);
3191 TIntermTyped *TParseContext::addBinaryMath(TOperator op, TIntermTyped *left, TIntermTyped *right, const TSourceLoc &loc)
3193 TIntermTyped *node = addBinaryMathInternal(op, left, right, loc);
3196 binaryOpError(loc, getOperatorString(op), left->getCompleteString(), right->getCompleteString());
3203 TIntermTyped *TParseContext::addBinaryMathBooleanResult(TOperator op, TIntermTyped *left, TIntermTyped *right, const TSourceLoc &loc)
3205 TIntermTyped *node = addBinaryMathInternal(op, left, right, loc);
3208 binaryOpError(loc, getOperatorString(op), left->getCompleteString(), right->getCompleteString());
3210 ConstantUnion *unionArray = new ConstantUnion[1];
3211 unionArray->setBConst(false);
3212 return intermediate.addConstantUnion(unionArray, TType(EbtBool, EbpUndefined, EvqConstExpr), loc);
3217 TIntermBranch *TParseContext::addBranch(TOperator op, const TSourceLoc &loc)
3222 if(mLoopNestingLevel <= 0)
3224 error(loc, "continue statement only allowed in loops", "");
3229 if(mLoopNestingLevel <= 0 && mSwitchNestingLevel <= 0)
3231 error(loc, "break statement only allowed in loops and switch statements", "");
3236 if(mCurrentFunctionType->getBasicType() != EbtVoid)
3238 error(loc, "non-void function must return a value", "return");
3243 // No checks for discard
3246 return intermediate.addBranch(op, loc);
3249 TIntermBranch *TParseContext::addBranch(TOperator op, TIntermTyped *returnValue, const TSourceLoc &loc)
3251 ASSERT(op == EOpReturn);
3252 mFunctionReturnsValue = true;
3253 if(mCurrentFunctionType->getBasicType() == EbtVoid)
3255 error(loc, "void function cannot return a value", "return");
3258 else if(*mCurrentFunctionType != returnValue->getType())
3260 error(loc, "function return is not matching type:", "return");
3263 return intermediate.addBranch(op, returnValue, loc);
3266 TIntermTyped *TParseContext::addFunctionCallOrMethod(TFunction *fnCall, TIntermNode *paramNode, TIntermNode *thisNode, const TSourceLoc &loc, bool *fatalError)
3268 *fatalError = false;
3269 TOperator op = fnCall->getBuiltInOp();
3270 TIntermTyped *callNode = nullptr;
3272 if(thisNode != nullptr)
3274 ConstantUnion *unionArray = new ConstantUnion[1];
3276 TIntermTyped *typedThis = thisNode->getAsTyped();
3277 if(fnCall->getName() != "length")
3279 error(loc, "invalid method", fnCall->getName().c_str());
3282 else if(paramNode != nullptr)
3284 error(loc, "method takes no parameters", "length");
3287 else if(typedThis == nullptr || !typedThis->isArray())
3289 error(loc, "length can only be called on arrays", "length");
3294 arraySize = typedThis->getArraySize();
3295 if(typedThis->getAsSymbolNode() == nullptr)
3297 // This code path can be hit with expressions like these:
3299 // (func()).length()
3300 // (int[3](0, 1, 2)).length()
3301 // ESSL 3.00 section 5.9 defines expressions so that this is not actually a valid expression.
3302 // It allows "An array name with the length method applied" in contrast to GLSL 4.4 spec section 5.9
3303 // which allows "An array, vector or matrix expression with the length method applied".
3304 error(loc, "length can only be called on array names, not on array expressions", "length");
3308 unionArray->setIConst(arraySize);
3309 callNode = intermediate.addConstantUnion(unionArray, TType(EbtInt, EbpUndefined, EvqConstExpr), loc);
3311 else if(op != EOpNull)
3314 // Then this should be a constructor.
3315 // Don't go through the symbol table for constructors.
3316 // Their parameters will be verified algorithmically.
3318 TType type(EbtVoid, EbpUndefined); // use this to get the type back
3319 if(!constructorErrorCheck(loc, paramNode, *fnCall, op, &type))
3322 // It's a constructor, of type 'type'.
3324 callNode = addConstructor(paramNode, &type, op, fnCall, loc);
3327 if(callNode == nullptr)
3330 callNode = intermediate.setAggregateOperator(nullptr, op, loc);
3332 callNode->setType(type);
3337 // Not a constructor. Find it in the symbol table.
3339 const TFunction *fnCandidate;
3341 fnCandidate = findFunction(loc, fnCall, &builtIn);
3345 // A declared function.
3347 if(builtIn && !fnCandidate->getExtension().empty() &&
3348 extensionErrorCheck(loc, fnCandidate->getExtension()))
3352 op = fnCandidate->getBuiltInOp();
3353 if(builtIn && op != EOpNull)
3356 // A function call mapped to a built-in operation.
3358 if(fnCandidate->getParamCount() == 1)
3361 // Treat it like a built-in unary operator.
3363 callNode = createUnaryMath(op, paramNode->getAsTyped(), loc, &fnCandidate->getReturnType());
3364 if(callNode == nullptr)
3366 std::stringstream extraInfoStream;
3367 extraInfoStream << "built in unary operator function. Type: "
3368 << static_cast<TIntermTyped*>(paramNode)->getCompleteString();
3369 std::string extraInfo = extraInfoStream.str();
3370 error(paramNode->getLine(), " wrong operand type", "Internal Error", extraInfo.c_str());
3377 TIntermAggregate *aggregate = intermediate.setAggregateOperator(paramNode, op, loc);
3378 aggregate->setType(fnCandidate->getReturnType());
3380 // Some built-in functions have out parameters too.
3381 functionCallLValueErrorCheck(fnCandidate, aggregate);
3383 callNode = aggregate;
3388 // This is a real function call
3390 TIntermAggregate *aggregate = intermediate.setAggregateOperator(paramNode, EOpFunctionCall, loc);
3391 aggregate->setType(fnCandidate->getReturnType());
3393 // this is how we know whether the given function is a builtIn function or a user defined function
3394 // if builtIn == false, it's a userDefined -> could be an overloaded builtIn function also
3395 // if builtIn == true, it's definitely a builtIn function with EOpNull
3397 aggregate->setUserDefined();
3398 aggregate->setName(fnCandidate->getMangledName());
3400 callNode = aggregate;
3402 functionCallLValueErrorCheck(fnCandidate, aggregate);
3404 callNode->setType(fnCandidate->getReturnType());
3408 // error message was put out by findFunction()
3409 // Put on a dummy node for error recovery
3410 ConstantUnion *unionArray = new ConstantUnion[1];
3411 unionArray->setFConst(0.0f);
3412 callNode = intermediate.addConstantUnion(unionArray, TType(EbtFloat, EbpUndefined, EvqConstExpr), loc);
3420 TIntermTyped *TParseContext::addTernarySelection(TIntermTyped *cond, TIntermTyped *trueBlock, TIntermTyped *falseBlock, const TSourceLoc &loc)
3422 if(boolErrorCheck(loc, cond))
3425 if(trueBlock->getType() != falseBlock->getType())
3427 binaryOpError(loc, ":", trueBlock->getCompleteString(), falseBlock->getCompleteString());
3431 // ESSL1 sections 5.2 and 5.7:
3432 // ESSL3 section 5.7:
3433 // Ternary operator is not among the operators allowed for structures/arrays.
3434 if(trueBlock->isArray() || trueBlock->getBasicType() == EbtStruct)
3436 error(loc, "ternary operator is not allowed for structures or arrays", ":");
3440 return intermediate.addSelection(cond, trueBlock, falseBlock, loc);
3444 // Parse an array of strings using yyparse.
3446 // Returns 0 for success.
3448 int PaParseStrings(int count, const char* const string[], const int length[],
3449 TParseContext* context) {
3450 if ((count == 0) || (string == NULL))
3453 if (glslang_initialize(context))
3456 int error = glslang_scan(count, string, length, context);
3458 error = glslang_parse(context);
3460 glslang_finalize(context);
3462 return (error == 0) && (context->numErrors() == 0) ? 0 : 1;