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"
15 ///////////////////////////////////////////////////////////////////////
17 // Sub- vector and matrix fields
19 ////////////////////////////////////////////////////////////////////////
22 // Look at a '.' field selector string and change it into offsets
25 bool TParseContext::parseVectorFields(const TString& compString, int vecSize, TVectorFields& fields, int line)
27 fields.num = (int) compString.size();
29 error(line, "illegal vector field selection", compString.c_str());
39 for (int i = 0; i < fields.num; ++i) {
40 switch (compString[i]) {
42 fields.offsets[i] = 0;
46 fields.offsets[i] = 0;
50 fields.offsets[i] = 0;
54 fields.offsets[i] = 1;
58 fields.offsets[i] = 1;
62 fields.offsets[i] = 1;
66 fields.offsets[i] = 2;
70 fields.offsets[i] = 2;
74 fields.offsets[i] = 2;
78 fields.offsets[i] = 3;
82 fields.offsets[i] = 3;
86 fields.offsets[i] = 3;
90 error(line, "illegal vector field selection", compString.c_str());
95 for (int i = 0; i < fields.num; ++i) {
96 if (fields.offsets[i] >= vecSize) {
97 error(line, "vector field selection out of range", compString.c_str());
102 if (fieldSet[i] != fieldSet[i-1]) {
103 error(line, "illegal - vector component fields not from the same set", compString.c_str());
114 // Look at a '.' field selector string and change it into offsets
117 bool TParseContext::parseMatrixFields(const TString& compString, int matCols, int matRows, TMatrixFields& fields, int line)
119 fields.wholeRow = false;
120 fields.wholeCol = false;
124 if (compString.size() != 2) {
125 error(line, "illegal length of matrix field selection", compString.c_str());
129 if (compString[0] == '_') {
130 if (compString[1] < '0' || compString[1] > '3') {
131 error(line, "illegal matrix field selection", compString.c_str());
134 fields.wholeCol = true;
135 fields.col = compString[1] - '0';
136 } else if (compString[1] == '_') {
137 if (compString[0] < '0' || compString[0] > '3') {
138 error(line, "illegal matrix field selection", compString.c_str());
141 fields.wholeRow = true;
142 fields.row = compString[0] - '0';
144 if (compString[0] < '0' || compString[0] > '3' ||
145 compString[1] < '0' || compString[1] > '3') {
146 error(line, "illegal matrix field selection", compString.c_str());
149 fields.row = compString[0] - '0';
150 fields.col = compString[1] - '0';
153 if (fields.row >= matRows || fields.col >= matCols) {
154 error(line, "matrix field selection out of range", compString.c_str());
161 ///////////////////////////////////////////////////////////////////////
165 ////////////////////////////////////////////////////////////////////////
168 // Track whether errors have occurred.
170 void TParseContext::recover()
175 // Used by flex/bison to output all syntax and parsing errors.
177 void TParseContext::error(TSourceLoc loc,
178 const char* reason, const char* token,
179 const char* extraInfo)
181 pp::SourceLocation srcLoc;
182 DecodeSourceLoc(loc, &srcLoc.file, &srcLoc.line);
183 diagnostics.writeInfo(pp::Diagnostics::PP_ERROR,
184 srcLoc, reason, token, extraInfo);
188 void TParseContext::warning(TSourceLoc loc,
189 const char* reason, const char* token,
190 const char* extraInfo) {
191 pp::SourceLocation srcLoc;
192 DecodeSourceLoc(loc, &srcLoc.file, &srcLoc.line);
193 diagnostics.writeInfo(pp::Diagnostics::PP_WARNING,
194 srcLoc, reason, token, extraInfo);
197 void TParseContext::trace(const char* str)
199 diagnostics.writeDebug(str);
203 // Same error message for all places assignments don't work.
205 void TParseContext::assignError(int 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(int 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(int 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(int line, TPrecision precision, TBasicType type){
238 if (!checksPrecisionErrors)
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(int 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(int 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(int 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(int line, TIntermNode* node, TFunction& function, TOperator op, TType* type)
459 *type = function.getReturnType();
461 bool constructingMatrix = false;
463 case EOpConstructMat2:
464 case EOpConstructMat3:
465 case EOpConstructMat4:
466 constructingMatrix = true;
473 // Note: It's okay to have too many components available, but not okay to have unused
474 // arguments. 'full' will go to true when enough args have been seen. If we loop
475 // again, there is an extra argument, so 'overfull' will become true.
479 bool constType = true;
481 bool overFull = false;
482 bool matrixInMatrix = false;
483 bool arrayArg = false;
484 for (size_t i = 0; i < function.getParamCount(); ++i) {
485 const TParameter& param = function.getParam(i);
486 size += param.type->getObjectSize();
488 if (constructingMatrix && param.type->isMatrix())
489 matrixInMatrix = true;
492 if (op != EOpConstructStruct && !type->isArray() && size >= type->getObjectSize())
494 if (param.type->getQualifier() != EvqConstExpr)
496 if (param.type->isArray())
501 type->setQualifier(EvqConstExpr);
503 if (type->isArray() && type->getArraySize() != function.getParamCount()) {
504 error(line, "array constructor needs one argument per array element", "constructor");
508 if (arrayArg && op != EOpConstructStruct) {
509 error(line, "constructing from a non-dereferenced array", "constructor");
513 if (matrixInMatrix && !type->isArray()) {
514 if (function.getParamCount() != 1) {
515 error(line, "constructing matrix from matrix can only take one argument", "constructor");
521 error(line, "too many arguments", "constructor");
525 if (op == EOpConstructStruct && !type->isArray() && int(type->getStruct()->fields().size()) != function.getParamCount()) {
526 error(line, "Number of constructor parameters does not match the number of structure fields", "constructor");
530 if (!type->isMatrix() || !matrixInMatrix) {
531 if ((op != EOpConstructStruct && size != 1 && size < type->getObjectSize()) ||
532 (op == EOpConstructStruct && size < type->getObjectSize())) {
533 error(line, "not enough data provided for construction", "constructor");
538 TIntermTyped *typed = node ? node->getAsTyped() : 0;
540 error(line, "constructor argument does not have a type", "constructor");
543 if (op != EOpConstructStruct && IsSampler(typed->getBasicType())) {
544 error(line, "cannot convert a sampler", "constructor");
547 if (typed->getBasicType() == EbtVoid) {
548 error(line, "cannot convert a void", "constructor");
555 // This function checks to see if a void variable has been declared and raise an error message for such a case
557 // returns true in case of an error
559 bool TParseContext::voidErrorCheck(int line, const TString& identifier, const TPublicType& pubType)
561 if (pubType.type == EbtVoid) {
562 error(line, "illegal use of type 'void'", identifier.c_str());
569 // This function checks to see if the node (for the expression) contains a scalar boolean expression or not
571 // returns true in case of an error
573 bool TParseContext::boolErrorCheck(int line, const TIntermTyped* type)
575 if (type->getBasicType() != EbtBool || type->isArray() || type->isMatrix() || type->isVector()) {
576 error(line, "boolean expression expected", "");
583 // This function checks to see if the node (for the expression) contains a scalar boolean expression or not
585 // returns true in case of an error
587 bool TParseContext::boolErrorCheck(int line, const TPublicType& pType)
589 if (pType.type != EbtBool || pType.array || (pType.primarySize > 1) || (pType.secondarySize > 1)) {
590 error(line, "boolean expression expected", "");
597 bool TParseContext::samplerErrorCheck(int line, const TPublicType& pType, const char* reason)
599 if (pType.type == EbtStruct) {
600 if (containsSampler(*pType.userDef)) {
601 error(line, reason, getBasicString(pType.type), "(structure contains a sampler)");
607 } else if (IsSampler(pType.type)) {
608 error(line, reason, getBasicString(pType.type));
616 bool TParseContext::structQualifierErrorCheck(int line, const TPublicType& pType)
618 switch(pType.qualifier)
631 if(pType.type == EbtStruct)
633 error(line, "cannot be used with a structure", getQualifierString(pType.qualifier));
642 if (pType.qualifier != EvqUniform && samplerErrorCheck(line, pType, "samplers must be uniform"))
645 // check for layout qualifier issues
646 const TLayoutQualifier layoutQualifier = pType.layoutQualifier;
648 if (pType.qualifier != EvqVertexIn && pType.qualifier != EvqFragmentOut &&
649 layoutLocationErrorCheck(line, pType.layoutQualifier))
657 bool TParseContext::layoutLocationErrorCheck(const TSourceLoc &location, const TLayoutQualifier &layoutQualifier)
\r
659 if(layoutQualifier.location != -1)
\r
661 error(location, "invalid layout qualifier:", "location", "only valid on program inputs and outputs");
\r
668 bool TParseContext::parameterSamplerErrorCheck(int line, TQualifier qualifier, const TType& type)
670 if ((qualifier == EvqOut || qualifier == EvqInOut) &&
671 type.getBasicType() != EbtStruct && IsSampler(type.getBasicType())) {
672 error(line, "samplers cannot be output parameters", type.getBasicString());
679 bool TParseContext::containsSampler(TType& type)
681 if (IsSampler(type.getBasicType()))
684 if (type.getBasicType() == EbtStruct) {
685 const TFieldList& fields = type.getStruct()->fields();
686 for(unsigned int i = 0; i < fields.size(); ++i) {
687 if (containsSampler(*fields[i]->type()))
696 // Do size checking for an array type's size.
698 // Returns true if there was an error.
700 bool TParseContext::arraySizeErrorCheck(int line, TIntermTyped* expr, int& size)
702 TIntermConstantUnion* constant = expr->getAsConstantUnion();
704 if (constant == 0 || !constant->isScalarInt())
706 error(line, "array size must be a constant integer expression", "");
710 if (constant->getBasicType() == EbtUInt)
712 unsigned int uintSize = constant->getUConst(0);
713 if (uintSize > static_cast<unsigned int>(std::numeric_limits<int>::max()))
715 error(line, "array size too large", "");
720 size = static_cast<int>(uintSize);
724 size = constant->getIConst(0);
728 error(line, "array size must be a positive integer", "");
738 // See if this qualifier can be an array.
740 // Returns true if there is an error.
742 bool TParseContext::arrayQualifierErrorCheck(int line, TPublicType type)
744 if ((type.qualifier == EvqAttribute) || (type.qualifier == EvqVertexIn) || (type.qualifier == EvqConstExpr)) {
745 error(line, "cannot declare arrays of this qualifier", TType(type).getCompleteString().c_str());
753 // See if this type can be an array.
755 // Returns true if there is an error.
757 bool TParseContext::arrayTypeErrorCheck(int line, TPublicType type)
760 // Can the type be an array?
763 error(line, "cannot declare arrays of arrays", TType(type).getCompleteString().c_str());
771 // Do all the semantic checking for declaring an array, with and
772 // without a size, and make the right changes to the symbol table.
774 // size == 0 means no specified size.
776 // Returns true if there was an error.
778 bool TParseContext::arrayErrorCheck(int line, TString& identifier, TPublicType type, TVariable*& variable)
781 // Don't check for reserved word use until after we know it's not in the symbol table,
782 // because reserved arrays can be redeclared.
785 bool builtIn = false;
786 bool sameScope = false;
787 TSymbol* symbol = symbolTable.find(identifier, shaderVersion, &builtIn, &sameScope);
788 if (symbol == 0 || !sameScope) {
789 if (reservedErrorCheck(line, identifier))
792 variable = new TVariable(&identifier, TType(type));
795 variable->getType().setArraySize(type.arraySize);
797 if (! symbolTable.declare(*variable)) {
799 error(line, "INTERNAL ERROR inserting new symbol", identifier.c_str());
803 if (! symbol->isVariable()) {
804 error(line, "variable expected", identifier.c_str());
808 variable = static_cast<TVariable*>(symbol);
809 if (! variable->getType().isArray()) {
810 error(line, "redeclaring non-array as array", identifier.c_str());
813 if (variable->getType().getArraySize() > 0) {
814 error(line, "redeclaration of array with size", identifier.c_str());
818 if (! variable->getType().sameElementType(TType(type))) {
819 error(line, "redeclaration of array with a different type", identifier.c_str());
823 TType* t = variable->getArrayInformationType();
825 if (t->getMaxArraySize() > type.arraySize) {
826 error(line, "higher index value already used for the array", identifier.c_str());
829 t->setArraySize(type.arraySize);
830 t = t->getArrayInformationType();
834 variable->getType().setArraySize(type.arraySize);
837 if (voidErrorCheck(line, identifier, type))
843 bool TParseContext::arraySetMaxSize(TIntermSymbol *node, TType* type, int size, bool updateFlag, TSourceLoc line)
845 bool builtIn = false;
846 TSymbol* symbol = symbolTable.find(node->getSymbol(), shaderVersion, &builtIn);
848 error(line, " undeclared identifier", node->getSymbol().c_str());
851 TVariable* variable = static_cast<TVariable*>(symbol);
853 type->setArrayInformationType(variable->getArrayInformationType());
854 variable->updateArrayInformationType(type);
856 // special casing to test index value of gl_FragData. If the accessed index is >= gl_MaxDrawBuffers
858 if (node->getSymbol() == "gl_FragData") {
859 TSymbol* fragData = symbolTable.find("gl_MaxDrawBuffers", shaderVersion, &builtIn);
862 int fragDataValue = static_cast<TVariable*>(fragData)->getConstPointer()[0].getIConst();
863 if (fragDataValue <= size) {
864 error(line, "", "[", "gl_FragData can only have a max array size of up to gl_MaxDrawBuffers");
869 // we dont want to update the maxArraySize when this flag is not set, we just want to include this
870 // node type in the chain of node types so that its updated when a higher maxArraySize comes in.
875 variable->getType().setMaxArraySize(size);
876 type->setMaxArraySize(size);
879 while(tt->getArrayInformationType() != 0) {
880 tt = tt->getArrayInformationType();
881 tt->setMaxArraySize(size);
888 // Enforce non-initializer type/qualifier rules.
890 // Returns true if there was an error.
892 bool TParseContext::nonInitConstErrorCheck(int line, TString& identifier, TPublicType& type, bool array)
894 if (type.qualifier == EvqConstExpr)
896 // Make the qualifier make sense.
897 type.qualifier = EvqTemporary;
901 error(line, "arrays may not be declared constant since they cannot be initialized", identifier.c_str());
903 else if (type.isStructureContainingArrays())
905 error(line, "structures containing arrays may not be declared constant since they cannot be initialized", identifier.c_str());
909 error(line, "variables with qualifier 'const' must be initialized", identifier.c_str());
919 // Do semantic checking for a variable declaration that has no initializer,
920 // and update the symbol table.
922 // Returns true if there was an error.
924 bool TParseContext::nonInitErrorCheck(int line, TString& identifier, TPublicType& type, TVariable*& variable)
926 if (reservedErrorCheck(line, identifier))
929 variable = new TVariable(&identifier, TType(type));
931 if (! symbolTable.declare(*variable)) {
932 error(line, "redefinition", variable->getName().c_str());
938 if (voidErrorCheck(line, identifier, type))
944 bool TParseContext::paramErrorCheck(int line, TQualifier qualifier, TQualifier paramQualifier, TType* type)
946 if (qualifier != EvqConstReadOnly && qualifier != EvqTemporary) {
947 error(line, "qualifier not allowed on function parameter", getQualifierString(qualifier));
950 if (qualifier == EvqConstReadOnly && paramQualifier != EvqIn) {
951 error(line, "qualifier not allowed with ", getQualifierString(qualifier), getQualifierString(paramQualifier));
955 if (qualifier == EvqConstReadOnly)
956 type->setQualifier(EvqConstReadOnly);
958 type->setQualifier(paramQualifier);
963 bool TParseContext::extensionErrorCheck(int line, const TString& extension)
965 const TExtensionBehavior& extBehavior = extensionBehavior();
966 TExtensionBehavior::const_iterator iter = extBehavior.find(extension.c_str());
967 if (iter == extBehavior.end()) {
968 error(line, "extension", extension.c_str(), "is not supported");
971 // In GLSL ES, an extension's default behavior is "disable".
972 if (iter->second == EBhDisable || iter->second == EBhUndefined) {
973 error(line, "extension", extension.c_str(), "is disabled");
976 if (iter->second == EBhWarn) {
977 warning(line, "extension", extension.c_str(), "is being used");
984 bool TParseContext::functionCallLValueErrorCheck(const TFunction *fnCandidate, TIntermAggregate *aggregate)
986 for(size_t i = 0; i < fnCandidate->getParamCount(); ++i)
988 TQualifier qual = fnCandidate->getParam(i).type->getQualifier();
989 if(qual == EvqOut || qual == EvqInOut)
991 TIntermTyped *node = (aggregate->getSequence())[i]->getAsTyped();
992 if(lValueErrorCheck(node->getLine(), "assign", node))
994 error(node->getLine(),
995 "Constant value cannot be passed for 'out' or 'inout' parameters.", "Error");
1004 bool TParseContext::supportsExtension(const char* extension)
1006 const TExtensionBehavior& extbehavior = extensionBehavior();
1007 TExtensionBehavior::const_iterator iter = extbehavior.find(extension);
1008 return (iter != extbehavior.end());
1011 void TParseContext::handleExtensionDirective(int line, const char* extName, const char* behavior)
1013 pp::SourceLocation loc;
1014 DecodeSourceLoc(line, &loc.file, &loc.line);
1015 directiveHandler.handleExtension(loc, extName, behavior);
1018 void TParseContext::handlePragmaDirective(int line, const char* name, const char* value)
1020 pp::SourceLocation loc;
1021 DecodeSourceLoc(line, &loc.file, &loc.line);
1022 directiveHandler.handlePragma(loc, name, value);
1025 /////////////////////////////////////////////////////////////////////////////////
1029 /////////////////////////////////////////////////////////////////////////////////
1032 // Look up a function name in the symbol table, and make sure it is a function.
1034 // Return the function symbol if found, otherwise 0.
1036 const TFunction* TParseContext::findFunction(int line, TFunction* call, bool *builtIn)
1038 // First find by unmangled name to check whether the function name has been
1039 // hidden by a variable name or struct typename.
1040 const TSymbol* symbol = symbolTable.find(call->getName(), shaderVersion, builtIn);
1042 symbol = symbolTable.find(call->getMangledName(), shaderVersion, builtIn);
1046 error(line, "no matching overloaded function found", call->getName().c_str());
1050 if (!symbol->isFunction()) {
1051 error(line, "function name expected", call->getName().c_str());
1055 return static_cast<const TFunction*>(symbol);
1059 // Initializers show up in several places in the grammar. Have one set of
1060 // code to handle them here.
1062 bool TParseContext::executeInitializer(TSourceLoc line, TString& identifier, TPublicType& pType,
1063 TIntermTyped* initializer, TIntermNode*& intermNode, TVariable* variable)
1065 TType type = TType(pType);
1067 if (variable == 0) {
1068 if (reservedErrorCheck(line, identifier))
1071 if (voidErrorCheck(line, identifier, pType))
1075 // add variable to symbol table
1077 variable = new TVariable(&identifier, type);
1078 if (! symbolTable.declare(*variable)) {
1079 error(line, "redefinition", variable->getName().c_str());
1081 // don't delete variable, it's used by error recovery, and the pool
1082 // pop will take care of the memory
1087 // identifier must be of type constant, a global, or a temporary
1089 TQualifier qualifier = variable->getType().getQualifier();
1090 if ((qualifier != EvqTemporary) && (qualifier != EvqGlobal) && (qualifier != EvqConstExpr)) {
1091 error(line, " cannot initialize this type of qualifier ", variable->getType().getQualifierString());
1095 // test for and propagate constant
1098 if (qualifier == EvqConstExpr) {
1099 if (qualifier != initializer->getType().getQualifier()) {
1100 std::stringstream extraInfoStream;
1101 extraInfoStream << "'" << variable->getType().getCompleteString() << "'";
1102 std::string extraInfo = extraInfoStream.str();
1103 error(line, " assigning non-constant to", "=", extraInfo.c_str());
1104 variable->getType().setQualifier(EvqTemporary);
1107 if (type != initializer->getType()) {
1108 error(line, " non-matching types for const initializer ",
1109 variable->getType().getQualifierString());
1110 variable->getType().setQualifier(EvqTemporary);
1113 if (initializer->getAsConstantUnion()) {
1114 ConstantUnion* unionArray = variable->getConstPointer();
1116 if (type.getObjectSize() == 1 && type.getBasicType() != EbtStruct) {
1117 *unionArray = (initializer->getAsConstantUnion()->getUnionArrayPointer())[0];
1119 variable->shareConstPointer(initializer->getAsConstantUnion()->getUnionArrayPointer());
1121 } else if (initializer->getAsSymbolNode()) {
1122 const TSymbol* symbol = symbolTable.find(initializer->getAsSymbolNode()->getSymbol(), shaderVersion);
1123 const TVariable* tVar = static_cast<const TVariable*>(symbol);
1125 ConstantUnion* constArray = tVar->getConstPointer();
1126 variable->shareConstPointer(constArray);
1128 std::stringstream extraInfoStream;
1129 extraInfoStream << "'" << variable->getType().getCompleteString() << "'";
1130 std::string extraInfo = extraInfoStream.str();
1131 error(line, " cannot assign to", "=", extraInfo.c_str());
1132 variable->getType().setQualifier(EvqTemporary);
1137 if (qualifier != EvqConstExpr) {
1138 TIntermSymbol* intermSymbol = intermediate.addSymbol(variable->getUniqueId(), variable->getName(), variable->getType(), line);
1139 intermNode = intermediate.addAssign(EOpInitialize, intermSymbol, initializer, line);
1140 if (intermNode == 0) {
1141 assignError(line, "=", intermSymbol->getCompleteString(), initializer->getCompleteString());
1150 bool TParseContext::areAllChildConst(TIntermAggregate* aggrNode)
1152 ASSERT(aggrNode != NULL);
1153 if (!aggrNode->isConstructor())
1156 bool allConstant = true;
1158 // check if all the child nodes are constants so that they can be inserted into
1160 TIntermSequence &sequence = aggrNode->getSequence() ;
1161 for (TIntermSequence::iterator p = sequence.begin(); p != sequence.end(); ++p) {
1162 if (!(*p)->getAsTyped()->getAsConstantUnion())
1169 TPublicType TParseContext::addFullySpecifiedType(TQualifier qualifier, bool invariant, TLayoutQualifier layoutQualifier, const TPublicType &typeSpecifier)
1171 TPublicType returnType = typeSpecifier;
1172 returnType.qualifier = qualifier;
1173 returnType.invariant = invariant;
1174 returnType.layoutQualifier = layoutQualifier;
1176 if(typeSpecifier.array)
1178 error(typeSpecifier.line, "not supported", "first-class array");
1180 returnType.clearArrayness();
1183 if(shaderVersion < 300)
1185 if(qualifier == EvqAttribute && (typeSpecifier.type == EbtBool || typeSpecifier.type == EbtInt))
1187 error(typeSpecifier.line, "cannot be bool or int", getQualifierString(qualifier));
1191 if((qualifier == EvqVaryingIn || qualifier == EvqVaryingOut) &&
1192 (typeSpecifier.type == EbtBool || typeSpecifier.type == EbtInt))
1194 error(typeSpecifier.line, "cannot be bool or int", getQualifierString(qualifier));
1206 case EvqCentroidOut:
1208 if(typeSpecifier.type == EbtBool)
1210 error(typeSpecifier.line, "cannot be bool", getQualifierString(qualifier));
1213 if(typeSpecifier.type == EbtInt || typeSpecifier.type == EbtUInt)
1215 error(typeSpecifier.line, "must use 'flat' interpolation here", getQualifierString(qualifier));
1221 case EvqFragmentOut:
1224 if(typeSpecifier.type == EbtBool)
1226 error(typeSpecifier.line, "cannot be bool", getQualifierString(qualifier));
1238 // This function is used to test for the correctness of the parameters passed to various constructor functions
1239 // and also convert them to the right datatype if it is allowed and required.
1241 // Returns 0 for an error or the constructed node (aggregate or typed) for no error.
1243 TIntermTyped* TParseContext::addConstructor(TIntermNode* arguments, const TType* type, TOperator op, TFunction* fnCall, TSourceLoc line)
1245 TIntermAggregate *aggregateArguments = arguments->getAsAggregate();
1247 if(!aggregateArguments)
1249 aggregateArguments = new TIntermAggregate;
1250 aggregateArguments->getSequence().push_back(arguments);
1253 if(op == EOpConstructStruct)
1255 const TFieldList &fields = type->getStruct()->fields();
1256 TIntermSequence &args = aggregateArguments->getSequence();
1258 for(size_t i = 0; i < fields.size(); i++)
1260 if(args[i]->getAsTyped()->getType() != *fields[i]->type())
1262 error(line, "Structure constructor arguments do not match structure fields", "Error");
1270 // Turn the argument list itself into a constructor
1271 TIntermTyped *constructor = intermediate.setAggregateOperator(aggregateArguments, op, line);
1272 TIntermTyped *constConstructor = foldConstConstructor(constructor->getAsAggregate(), *type);
1273 if(constConstructor)
1275 return constConstructor;
1281 TIntermTyped* TParseContext::foldConstConstructor(TIntermAggregate* aggrNode, const TType& type)
1283 bool canBeFolded = areAllChildConst(aggrNode);
1284 aggrNode->setType(type);
1286 bool returnVal = false;
1287 ConstantUnion* unionArray = new ConstantUnion[type.getObjectSize()];
1288 if (aggrNode->getSequence().size() == 1) {
1289 returnVal = intermediate.parseConstTree(aggrNode->getLine(), aggrNode, unionArray, aggrNode->getOp(), type, true);
1292 returnVal = intermediate.parseConstTree(aggrNode->getLine(), aggrNode, unionArray, aggrNode->getOp(), type);
1297 return intermediate.addConstantUnion(unionArray, type, aggrNode->getLine());
1304 // This function returns the tree representation for the vector field(s) being accessed from contant vector.
1305 // If only one component of vector is accessed (v.x or v[0] where v is a contant vector), then a contant node is
1306 // returned, else an aggregate node is returned (for v.xy). The input to this function could either be the symbol
1307 // node or it could be the intermediate tree representation of accessing fields in a constant structure or column of
1308 // a constant matrix.
1310 TIntermTyped* TParseContext::addConstVectorNode(TVectorFields& fields, TIntermTyped* node, TSourceLoc line)
1312 TIntermTyped* typedNode;
1313 TIntermConstantUnion* tempConstantNode = node->getAsConstantUnion();
1315 ConstantUnion *unionArray;
1316 if (tempConstantNode) {
1317 unionArray = tempConstantNode->getUnionArrayPointer();
1322 } else { // The node has to be either a symbol node or an aggregate node or a tempConstant node, else, its an error
1323 error(line, "Cannot offset into the vector", "Error");
1329 ConstantUnion* constArray = new ConstantUnion[fields.num];
1331 for (int i = 0; i < fields.num; i++) {
1332 if (fields.offsets[i] >= node->getType().getObjectSize()) {
1333 std::stringstream extraInfoStream;
1334 extraInfoStream << "vector field selection out of range '" << fields.offsets[i] << "'";
1335 std::string extraInfo = extraInfoStream.str();
1336 error(line, "", "[", extraInfo.c_str());
1338 fields.offsets[i] = 0;
1341 constArray[i] = unionArray[fields.offsets[i]];
1344 typedNode = intermediate.addConstantUnion(constArray, node->getType(), line);
1349 // This function returns the column being accessed from a constant matrix. The values are retrieved from
1350 // the symbol table and parse-tree is built for a vector (each column of a matrix is a vector). The input
1351 // to the function could either be a symbol node (m[0] where m is a constant matrix)that represents a
1352 // constant matrix or it could be the tree representation of the constant matrix (s.m1[0] where s is a constant structure)
1354 TIntermTyped* TParseContext::addConstMatrixNode(int index, TIntermTyped* node, TSourceLoc line)
1356 TIntermTyped* typedNode;
1357 TIntermConstantUnion* tempConstantNode = node->getAsConstantUnion();
1359 if (index >= node->getType().getNominalSize()) {
1360 std::stringstream extraInfoStream;
1361 extraInfoStream << "matrix field selection out of range '" << index << "'";
1362 std::string extraInfo = extraInfoStream.str();
1363 error(line, "", "[", extraInfo.c_str());
1368 if (tempConstantNode) {
1369 ConstantUnion* unionArray = tempConstantNode->getUnionArrayPointer();
1370 int size = tempConstantNode->getType().getNominalSize();
1371 typedNode = intermediate.addConstantUnion(&unionArray[size*index], tempConstantNode->getType(), line);
1373 error(line, "Cannot offset into the matrix", "Error");
1384 // This function returns an element of an array accessed from a constant array. The values are retrieved from
1385 // the symbol table and parse-tree is built for the type of the element. The input
1386 // to the function could either be a symbol node (a[0] where a is a constant array)that represents a
1387 // constant array or it could be the tree representation of the constant array (s.a1[0] where s is a constant structure)
1389 TIntermTyped* TParseContext::addConstArrayNode(int index, TIntermTyped* node, TSourceLoc line)
1391 TIntermTyped* typedNode;
1392 TIntermConstantUnion* tempConstantNode = node->getAsConstantUnion();
1393 TType arrayElementType = node->getType();
1394 arrayElementType.clearArrayness();
1396 if (index >= node->getType().getArraySize()) {
1397 std::stringstream extraInfoStream;
1398 extraInfoStream << "array field selection out of range '" << index << "'";
1399 std::string extraInfo = extraInfoStream.str();
1400 error(line, "", "[", extraInfo.c_str());
1405 int arrayElementSize = arrayElementType.getObjectSize();
1407 if (tempConstantNode) {
1408 ConstantUnion* unionArray = tempConstantNode->getUnionArrayPointer();
1409 typedNode = intermediate.addConstantUnion(&unionArray[arrayElementSize * index], tempConstantNode->getType(), line);
1411 error(line, "Cannot offset into the array", "Error");
1422 // This function returns the value of a particular field inside a constant structure from the symbol table.
1423 // If there is an embedded/nested struct, it appropriately calls addConstStructNested or addConstStructFromAggr
1424 // function and returns the parse-tree with the values of the embedded/nested struct.
1426 TIntermTyped* TParseContext::addConstStruct(const TString& identifier, TIntermTyped* node, TSourceLoc line)
1428 const TFieldList &fields = node->getType().getStruct()->fields();
1429 TIntermTyped *typedNode;
1430 int instanceSize = 0;
1431 unsigned int index = 0;
1432 TIntermConstantUnion *tempConstantNode = node->getAsConstantUnion();
1434 for ( index = 0; index < fields.size(); ++index) {
1435 if (fields[index]->name() == identifier) {
1438 instanceSize += fields[index]->type()->getObjectSize();
1442 if (tempConstantNode) {
1443 ConstantUnion* constArray = tempConstantNode->getUnionArrayPointer();
1445 typedNode = intermediate.addConstantUnion(constArray+instanceSize, tempConstantNode->getType(), line); // type will be changed in the calling function
1447 error(line, "Cannot offset into the structure", "Error");
1457 // Parse an array index expression
1459 TIntermTyped *TParseContext::addIndexExpression(TIntermTyped *baseExpression, const TSourceLoc &location, TIntermTyped *indexExpression)
1461 TIntermTyped *indexedExpression = NULL;
1463 if(!baseExpression->isArray() && !baseExpression->isMatrix() && !baseExpression->isVector())
1465 if(baseExpression->getAsSymbolNode())
1467 error(location, " left of '[' is not of type array, matrix, or vector ",
1468 baseExpression->getAsSymbolNode()->getSymbol().c_str());
1472 error(location, " left of '[' is not of type array, matrix, or vector ", "expression");
1477 TIntermConstantUnion *indexConstantUnion = indexExpression->getAsConstantUnion();
1479 if(indexExpression->getQualifier() == EvqConstExpr && indexConstantUnion)
1481 int index = indexConstantUnion->getIConst(0);
1484 std::stringstream infoStream;
1485 infoStream << index;
1486 std::string info = infoStream.str();
1487 error(location, "negative index", info.c_str());
1491 if(baseExpression->getType().getQualifier() == EvqConstExpr)
1493 if(baseExpression->isArray())
1495 // constant folding for arrays
1496 indexedExpression = addConstArrayNode(index, baseExpression, location);
1498 else if(baseExpression->isVector())
1500 // constant folding for vectors
1501 TVectorFields fields;
1503 fields.offsets[0] = index; // need to do it this way because v.xy sends fields integer array
1504 indexedExpression = addConstVectorNode(fields, baseExpression, location);
1506 else if(baseExpression->isMatrix())
1508 // constant folding for matrices
1509 indexedExpression = addConstMatrixNode(index, baseExpression, location);
1516 if(baseExpression->isArray())
1518 if(index >= baseExpression->getType().getArraySize())
1520 std::stringstream extraInfoStream;
1521 extraInfoStream << "array index out of range '" << index << "'";
1522 std::string extraInfo = extraInfoStream.str();
1523 error(location, "", "[", extraInfo.c_str());
1525 safeIndex = baseExpression->getType().getArraySize() - 1;
1528 else if((baseExpression->isVector() || baseExpression->isMatrix()) &&
1529 baseExpression->getType().getNominalSize() <= index)
1531 std::stringstream extraInfoStream;
1532 extraInfoStream << "field selection out of range '" << index << "'";
1533 std::string extraInfo = extraInfoStream.str();
1534 error(location, "", "[", extraInfo.c_str());
1536 safeIndex = baseExpression->getType().getNominalSize() - 1;
1539 // Don't modify the data of the previous constant union, because it can point
1540 // to builtins, like gl_MaxDrawBuffers. Instead use a new sanitized object.
1543 ConstantUnion *safeConstantUnion = new ConstantUnion();
1544 safeConstantUnion->setIConst(safeIndex);
1545 indexConstantUnion->replaceConstantUnion(safeConstantUnion);
1548 indexedExpression = intermediate.addIndex(EOpIndexDirect, baseExpression, indexExpression, location);
1553 if(baseExpression->isInterfaceBlock())
1556 "[", "array indexes for interface blocks arrays must be constant integral expressions");
1561 else if(baseExpression->getQualifier() == EvqFragmentOut)
1563 error(location, "", "[", "array indexes for fragment outputs must be constant integral expressions");
1568 indexedExpression = intermediate.addIndex(EOpIndexIndirect, baseExpression, indexExpression, location);
1571 if(indexedExpression == 0)
1573 ConstantUnion *unionArray = new ConstantUnion[1];
1574 unionArray->setFConst(0.0f);
1575 indexedExpression = intermediate.addConstantUnion(unionArray, TType(EbtFloat, EbpHigh, EvqConstExpr), location);
1577 else if(baseExpression->isArray())
1579 const TType &baseType = baseExpression->getType();
1580 if(baseType.getStruct())
1582 TType copyOfType(baseType.getStruct());
1583 indexedExpression->setType(copyOfType);
1585 else if(baseType.isInterfaceBlock())
1587 TType copyOfType(baseType.getInterfaceBlock(), baseType.getQualifier(), baseType.getLayoutQualifier(), 0);
1588 indexedExpression->setType(copyOfType);
1592 indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision(),
1593 EvqTemporary, static_cast<unsigned char>(baseExpression->getNominalSize()),
1594 static_cast<unsigned char>(baseExpression->getSecondarySize())));
1597 if(baseExpression->getType().getQualifier() == EvqConstExpr)
1599 indexedExpression->getTypePointer()->setQualifier(EvqConstExpr);
1602 else if(baseExpression->isMatrix())
1604 TQualifier qualifier = baseExpression->getType().getQualifier() == EvqConstExpr ? EvqConstExpr : EvqTemporary;
1605 indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision(),
1606 qualifier, static_cast<unsigned char>(baseExpression->getSecondarySize())));
1608 else if(baseExpression->isVector())
1610 TQualifier qualifier = baseExpression->getType().getQualifier() == EvqConstExpr ? EvqConstExpr : EvqTemporary;
1611 indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision(), qualifier));
1615 indexedExpression->setType(baseExpression->getType());
1618 return indexedExpression;
1621 TIntermTyped *TParseContext::addFieldSelectionExpression(TIntermTyped *baseExpression, const TSourceLoc &dotLocation,
1622 const TString &fieldString, const TSourceLoc &fieldLocation)
1624 TIntermTyped *indexedExpression = NULL;
1626 if(baseExpression->isArray())
1628 error(fieldLocation, "cannot apply dot operator to an array", ".");
1632 if(baseExpression->isVector())
1634 TVectorFields fields;
1635 if(!parseVectorFields(fieldString, baseExpression->getNominalSize(), fields, fieldLocation))
1638 fields.offsets[0] = 0;
1642 if(baseExpression->getType().getQualifier() == EvqConstExpr)
1644 // constant folding for vector fields
1645 indexedExpression = addConstVectorNode(fields, baseExpression, fieldLocation);
1646 if(indexedExpression == 0)
1649 indexedExpression = baseExpression;
1653 indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision(),
1654 EvqConstExpr, (unsigned char)(fieldString).size()));
1659 TString vectorString = fieldString;
1660 TIntermTyped *index = intermediate.addSwizzle(fields, fieldLocation);
1661 indexedExpression = intermediate.addIndex(EOpVectorSwizzle, baseExpression, index, dotLocation);
1662 indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision(),
1663 EvqTemporary, (unsigned char)vectorString.size()));
1666 else if(baseExpression->isMatrix())
1668 TMatrixFields fields;
1669 if(!parseMatrixFields(fieldString, baseExpression->getNominalSize(), baseExpression->getSecondarySize(), fields, fieldLocation))
1671 fields.wholeRow = false;
1672 fields.wholeCol = false;
1678 if(fields.wholeRow || fields.wholeCol)
1680 error(dotLocation, " non-scalar fields not implemented yet", ".");
1682 ConstantUnion *unionArray = new ConstantUnion[1];
1683 unionArray->setIConst(0);
1684 TIntermTyped *index = intermediate.addConstantUnion(unionArray, TType(EbtInt, EbpUndefined, EvqConstExpr),
1686 indexedExpression = intermediate.addIndex(EOpIndexDirect, baseExpression, index, dotLocation);
1687 indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision(),
1688 EvqTemporary, static_cast<unsigned char>(baseExpression->getNominalSize()),
1689 static_cast<unsigned char>(baseExpression->getSecondarySize())));
1693 ConstantUnion *unionArray = new ConstantUnion[1];
1694 unionArray->setIConst(fields.col * baseExpression->getSecondarySize() + fields.row);
1695 TIntermTyped *index = intermediate.addConstantUnion(unionArray, TType(EbtInt, EbpUndefined, EvqConstExpr),
1697 indexedExpression = intermediate.addIndex(EOpIndexDirect, baseExpression, index, dotLocation);
1698 indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision()));
1701 else if(baseExpression->getBasicType() == EbtStruct)
1703 bool fieldFound = false;
1704 const TFieldList &fields = baseExpression->getType().getStruct()->fields();
1707 error(dotLocation, "structure has no fields", "Internal Error");
1709 indexedExpression = baseExpression;
1714 for(i = 0; i < fields.size(); ++i)
1716 if(fields[i]->name() == fieldString)
1724 if(baseExpression->getType().getQualifier() == EvqConstExpr)
1726 indexedExpression = addConstStruct(fieldString, baseExpression, dotLocation);
1727 if(indexedExpression == 0)
1730 indexedExpression = baseExpression;
1734 indexedExpression->setType(*fields[i]->type());
1735 // change the qualifier of the return type, not of the structure field
1736 // as the structure definition is shared between various structures.
1737 indexedExpression->getTypePointer()->setQualifier(EvqConstExpr);
1742 ConstantUnion *unionArray = new ConstantUnion[1];
1743 unionArray->setIConst(i);
1744 TIntermTyped *index = intermediate.addConstantUnion(unionArray, *fields[i]->type(), fieldLocation);
1745 indexedExpression = intermediate.addIndex(EOpIndexDirectStruct, baseExpression, index, dotLocation);
1746 indexedExpression->setType(*fields[i]->type());
1751 error(dotLocation, " no such field in structure", fieldString.c_str());
1753 indexedExpression = baseExpression;
1757 else if(baseExpression->isInterfaceBlock())
1759 bool fieldFound = false;
1760 const TFieldList &fields = baseExpression->getType().getInterfaceBlock()->fields();
1763 error(dotLocation, "interface block has no fields", "Internal Error");
1765 indexedExpression = baseExpression;
1770 for(i = 0; i < fields.size(); ++i)
1772 if(fields[i]->name() == fieldString)
1780 ConstantUnion *unionArray = new ConstantUnion[1];
1781 unionArray->setIConst(i);
1782 TIntermTyped *index = intermediate.addConstantUnion(unionArray, *fields[i]->type(), fieldLocation);
1783 indexedExpression = intermediate.addIndex(EOpIndexDirectInterfaceBlock, baseExpression, index,
1785 indexedExpression->setType(*fields[i]->type());
1789 error(dotLocation, " no such field in interface block", fieldString.c_str());
1791 indexedExpression = baseExpression;
1797 if(shaderVersion < 300)
1799 error(dotLocation, " field selection requires structure, vector, or matrix on left hand side",
1800 fieldString.c_str());
1805 " field selection requires structure, vector, matrix, or interface block on left hand side",
1806 fieldString.c_str());
1809 indexedExpression = baseExpression;
1812 return indexedExpression;
1815 TLayoutQualifier TParseContext::parseLayoutQualifier(const TString &qualifierType, const TSourceLoc& qualifierTypeLine)
1817 TLayoutQualifier qualifier;
1819 qualifier.location = -1;
1820 qualifier.matrixPacking = EmpUnspecified;
1821 qualifier.blockStorage = EbsUnspecified;
1823 if(qualifierType == "shared")
1825 qualifier.blockStorage = EbsShared;
1827 else if(qualifierType == "packed")
1829 qualifier.blockStorage = EbsPacked;
1831 else if(qualifierType == "std140")
1833 qualifier.blockStorage = EbsStd140;
1835 else if(qualifierType == "row_major")
1837 qualifier.matrixPacking = EmpRowMajor;
1839 else if(qualifierType == "column_major")
1841 qualifier.matrixPacking = EmpColumnMajor;
1843 else if(qualifierType == "location")
1845 error(qualifierTypeLine, "invalid layout qualifier", qualifierType.c_str(), "location requires an argument");
1850 error(qualifierTypeLine, "invalid layout qualifier", qualifierType.c_str());
1857 TLayoutQualifier TParseContext::parseLayoutQualifier(const TString &qualifierType, const TSourceLoc& qualifierTypeLine, const TString &intValueString, int intValue, const TSourceLoc& intValueLine)
1859 TLayoutQualifier qualifier;
1861 qualifier.location = -1;
1862 qualifier.matrixPacking = EmpUnspecified;
1863 qualifier.blockStorage = EbsUnspecified;
1865 if (qualifierType != "location")
1867 error(qualifierTypeLine, "invalid layout qualifier", qualifierType.c_str(), "only location may have arguments");
1872 // must check that location is non-negative
1875 error(intValueLine, "out of range:", intValueString.c_str(), "location must be non-negative");
1880 qualifier.location = intValue;
1887 TLayoutQualifier TParseContext::joinLayoutQualifiers(TLayoutQualifier leftQualifier, TLayoutQualifier rightQualifier)
1889 TLayoutQualifier joinedQualifier = leftQualifier;
1891 if (rightQualifier.location != -1)
1893 joinedQualifier.location = rightQualifier.location;
1895 if(rightQualifier.matrixPacking != EmpUnspecified)
1897 joinedQualifier.matrixPacking = rightQualifier.matrixPacking;
1899 if(rightQualifier.blockStorage != EbsUnspecified)
1901 joinedQualifier.blockStorage = rightQualifier.blockStorage;
1904 return joinedQualifier;
1908 TPublicType TParseContext::joinInterpolationQualifiers(const TSourceLoc &interpolationLoc, TQualifier interpolationQualifier,
1909 const TSourceLoc &storageLoc, TQualifier storageQualifier)
1911 TQualifier mergedQualifier = EvqSmoothIn;
1913 if(storageQualifier == EvqFragmentIn) {
1914 if(interpolationQualifier == EvqSmooth)
1915 mergedQualifier = EvqSmoothIn;
1916 else if(interpolationQualifier == EvqFlat)
1917 mergedQualifier = EvqFlatIn;
1920 else if(storageQualifier == EvqCentroidIn) {
1921 if(interpolationQualifier == EvqSmooth)
1922 mergedQualifier = EvqCentroidIn;
1923 else if(interpolationQualifier == EvqFlat)
1924 mergedQualifier = EvqFlatIn;
1927 else if(storageQualifier == EvqVertexOut) {
1928 if(interpolationQualifier == EvqSmooth)
1929 mergedQualifier = EvqSmoothOut;
1930 else if(interpolationQualifier == EvqFlat)
1931 mergedQualifier = EvqFlatOut;
1934 else if(storageQualifier == EvqCentroidOut) {
1935 if(interpolationQualifier == EvqSmooth)
1936 mergedQualifier = EvqCentroidOut;
1937 else if(interpolationQualifier == EvqFlat)
1938 mergedQualifier = EvqFlatOut;
1942 error(interpolationLoc, "interpolation qualifier requires a fragment 'in' or vertex 'out' storage qualifier", getQualifierString(interpolationQualifier));
1945 mergedQualifier = storageQualifier;
1949 type.setBasic(EbtVoid, mergedQualifier, storageLoc);
1953 TFieldList *TParseContext::addStructDeclaratorList(const TPublicType &typeSpecifier, TFieldList *fieldList)
1955 if(voidErrorCheck(typeSpecifier.line, (*fieldList)[0]->name(), typeSpecifier))
1960 for(unsigned int i = 0; i < fieldList->size(); ++i)
1963 // Careful not to replace already known aspects of type, like array-ness
1965 TType *type = (*fieldList)[i]->type();
1966 type->setBasicType(typeSpecifier.type);
1967 type->setNominalSize(typeSpecifier.primarySize);
1968 type->setSecondarySize(typeSpecifier.secondarySize);
1969 type->setPrecision(typeSpecifier.precision);
1970 type->setQualifier(typeSpecifier.qualifier);
1971 type->setLayoutQualifier(typeSpecifier.layoutQualifier);
1973 // don't allow arrays of arrays
1976 if(arrayTypeErrorCheck(typeSpecifier.line, typeSpecifier))
1979 if(typeSpecifier.array)
1980 type->setArraySize(typeSpecifier.arraySize);
1981 if(typeSpecifier.userDef)
1983 type->setStruct(typeSpecifier.userDef->getStruct());
1986 if(structNestingErrorCheck(typeSpecifier.line, *(*fieldList)[i]))
1995 TPublicType TParseContext::addStructure(const TSourceLoc &structLine, const TSourceLoc &nameLine,
1996 const TString *structName, TFieldList *fieldList)
1998 TStructure *structure = new TStructure(structName, fieldList);
1999 TType *structureType = new TType(structure);
2001 // Store a bool in the struct if we're at global scope, to allow us to
2002 // skip the local struct scoping workaround in HLSL.
2003 structure->setUniqueId(TSymbolTableLevel::nextUniqueId());
2004 structure->setAtGlobalScope(symbolTable.atGlobalLevel());
2006 if(!structName->empty())
2008 if(reservedErrorCheck(nameLine, *structName))
2012 TVariable *userTypeDef = new TVariable(structName, *structureType, true);
2013 if(!symbolTable.declare(*userTypeDef))
2015 error(nameLine, "redefinition", structName->c_str(), "struct");
2020 // ensure we do not specify any storage qualifiers on the struct members
2021 for(unsigned int typeListIndex = 0; typeListIndex < fieldList->size(); typeListIndex++)
2023 const TField &field = *(*fieldList)[typeListIndex];
2024 const TQualifier qualifier = field.type()->getQualifier();
2031 error(field.line(), "invalid qualifier on struct member", getQualifierString(qualifier));
2037 TPublicType publicType;
2038 publicType.setBasic(EbtStruct, EvqTemporary, structLine);
2039 publicType.userDef = structureType;
2040 exitStructDeclaration();
2045 bool TParseContext::enterStructDeclaration(int line, const TString& identifier)
2047 ++structNestingLevel;
2049 // Embedded structure definitions are not supported per GLSL ES spec.
2050 // They aren't allowed in GLSL either, but we need to detect this here
2051 // so we don't rely on the GLSL compiler to catch it.
2052 if (structNestingLevel > 1) {
2053 error(line, "", "Embedded struct definitions are not allowed");
2060 void TParseContext::exitStructDeclaration()
2062 --structNestingLevel;
2065 bool TParseContext::structNestingErrorCheck(const TSourceLoc &line, const TField &field)
2067 static const int kWebGLMaxStructNesting = 4;
2069 if(field.type()->getBasicType() != EbtStruct)
2074 // We're already inside a structure definition at this point, so add
2075 // one to the field's struct nesting.
2076 if(1 + field.type()->getDeepestStructNesting() > kWebGLMaxStructNesting)
2078 std::stringstream reasonStream;
2079 reasonStream << "Reference of struct type "
2080 << field.type()->getStruct()->name().c_str()
2081 << " exceeds maximum allowed nesting level of "
2082 << kWebGLMaxStructNesting;
2083 std::string reason = reasonStream.str();
2084 error(line, reason.c_str(), field.name().c_str(), "");
2091 TIntermTyped *TParseContext::createUnaryMath(TOperator op, TIntermTyped *child, const TSourceLoc &loc, const TType *funcReturnType)
2093 if(child == nullptr)
2101 if(child->getBasicType() != EbtBool ||
2102 child->isMatrix() ||
2110 if((child->getBasicType() != EbtInt && child->getBasicType() != EbtUInt) ||
2111 child->isMatrix() ||
2117 case EOpPostIncrement:
2118 case EOpPreIncrement:
2119 case EOpPostDecrement:
2120 case EOpPreDecrement:
2122 if(child->getBasicType() == EbtStruct ||
2123 child->getBasicType() == EbtBool ||
2128 // Operators for built-ins are already type checked against their prototype.
2133 return intermediate.addUnaryMath(op, child, loc); // FIXME , funcReturnType);
2136 TIntermTyped *TParseContext::addUnaryMath(TOperator op, TIntermTyped *child, const TSourceLoc &loc)
2138 TIntermTyped *node = createUnaryMath(op, child, loc, nullptr);
2141 unaryOpError(loc, getOperatorString(op), child->getCompleteString());
2148 TIntermTyped *TParseContext::addUnaryMathLValue(TOperator op, TIntermTyped *child, const TSourceLoc &loc)
2150 if(lValueErrorCheck(loc, getOperatorString(op), child))
2152 return addUnaryMath(op, child, loc);
2155 bool TParseContext::binaryOpCommonCheck(TOperator op, TIntermTyped *left, TIntermTyped *right, const TSourceLoc &loc)
2157 if(left->isArray() || right->isArray())
2159 if(shaderVersion < 300)
2161 error(loc, "Invalid operation for arrays", getOperatorString(op));
2165 if(left->isArray() != right->isArray())
2167 error(loc, "array / non-array mismatch", getOperatorString(op));
2179 error(loc, "Invalid operation for arrays", getOperatorString(op));
2182 // At this point, size of implicitly sized arrays should be resolved.
2183 if(left->getArraySize() != right->getArraySize())
2185 error(loc, "array size mismatch", getOperatorString(op));
2190 // Check ops which require integer / ivec parameters
2191 bool isBitShift = false;
2194 case EOpBitShiftLeft:
2195 case EOpBitShiftRight:
2196 case EOpBitShiftLeftAssign:
2197 case EOpBitShiftRightAssign:
2198 // Unsigned can be bit-shifted by signed and vice versa, but we need to
2199 // check that the basic type is an integer type.
2201 if(!IsInteger(left->getBasicType()) || !IsInteger(right->getBasicType()))
2209 case EOpBitwiseAndAssign:
2210 case EOpBitwiseXorAssign:
2211 case EOpBitwiseOrAssign:
2212 // It is enough to check the type of only one operand, since later it
2213 // is checked that the operand types match.
2214 if(!IsInteger(left->getBasicType()))
2223 // GLSL ES 1.00 and 3.00 do not support implicit type casting.
2224 // So the basic type should usually match.
2225 if(!isBitShift && left->getBasicType() != right->getBasicType())
2230 // Check that type sizes match exactly on ops that require that.
2231 // Also check restrictions for structs that contain arrays or samplers.
2238 // ESSL 1.00 sections 5.7, 5.8, 5.9
2239 if(shaderVersion < 300 && left->getType().isStructureContainingArrays())
2241 error(loc, "undefined operation for structs containing arrays", getOperatorString(op));
2244 // Samplers as l-values are disallowed also in ESSL 3.00, see section 4.1.7,
2245 // we interpret the spec so that this extends to structs containing samplers,
2246 // similarly to ESSL 1.00 spec.
2247 if((shaderVersion < 300 || op == EOpAssign || op == EOpInitialize) &&
2248 left->getType().isStructureContainingSamplers())
2250 error(loc, "undefined operation for structs containing samplers", getOperatorString(op));
2254 case EOpGreaterThan:
2255 case EOpLessThanEqual:
2256 case EOpGreaterThanEqual:
2257 if((left->getNominalSize() != right->getNominalSize()) ||
2258 (left->getSecondarySize() != right->getSecondarySize()))
2270 // Parse an array of strings using yyparse.
2272 // Returns 0 for success.
2274 int PaParseStrings(int count, const char* const string[], const int length[],
2275 TParseContext* context) {
2276 if ((count == 0) || (string == NULL))
2279 if (glslang_initialize(context))
2282 int error = glslang_scan(count, string, length, context);
2284 error = glslang_parse(context);
2286 glslang_finalize(context);
2288 return (error == 0) && (context->numErrors() == 0) ? 0 : 1;