// | |
// Copyright (c) 2002-2013 The ANGLE Project Authors. All rights reserved. | |
// Use of this source code is governed by a BSD-style license that can be | |
// found in the LICENSE file. | |
// | |
#include "compiler/ParseHelper.h" | |
#include <stdarg.h> | |
#include <stdio.h> | |
#include "compiler/glslang.h" | |
#include "compiler/preprocessor/SourceLocation.h" | |
/////////////////////////////////////////////////////////////////////// | |
// | |
// Sub- vector and matrix fields | |
// | |
//////////////////////////////////////////////////////////////////////// | |
// | |
// Look at a '.' field selector string and change it into offsets | |
// for a vector. | |
// | |
bool TParseContext::parseVectorFields(const TString& compString, int vecSize, TVectorFields& fields, const TSourceLoc& line) | |
{ | |
fields.num = (int) compString.size(); | |
if (fields.num > 4) { | |
error(line, "illegal vector field selection", compString.c_str()); | |
return false; | |
} | |
enum { | |
exyzw, | |
ergba, | |
estpq | |
} fieldSet[4]; | |
for (int i = 0; i < fields.num; ++i) { | |
switch (compString[i]) { | |
case 'x': | |
fields.offsets[i] = 0; | |
fieldSet[i] = exyzw; | |
break; | |
case 'r': | |
fields.offsets[i] = 0; | |
fieldSet[i] = ergba; | |
break; | |
case 's': | |
fields.offsets[i] = 0; | |
fieldSet[i] = estpq; | |
break; | |
case 'y': | |
fields.offsets[i] = 1; | |
fieldSet[i] = exyzw; | |
break; | |
case 'g': | |
fields.offsets[i] = 1; | |
fieldSet[i] = ergba; | |
break; | |
case 't': | |
fields.offsets[i] = 1; | |
fieldSet[i] = estpq; | |
break; | |
case 'z': | |
fields.offsets[i] = 2; | |
fieldSet[i] = exyzw; | |
break; | |
case 'b': | |
fields.offsets[i] = 2; | |
fieldSet[i] = ergba; | |
break; | |
case 'p': | |
fields.offsets[i] = 2; | |
fieldSet[i] = estpq; | |
break; | |
case 'w': | |
fields.offsets[i] = 3; | |
fieldSet[i] = exyzw; | |
break; | |
case 'a': | |
fields.offsets[i] = 3; | |
fieldSet[i] = ergba; | |
break; | |
case 'q': | |
fields.offsets[i] = 3; | |
fieldSet[i] = estpq; | |
break; | |
default: | |
error(line, "illegal vector field selection", compString.c_str()); | |
return false; | |
} | |
} | |
for (int i = 0; i < fields.num; ++i) { | |
if (fields.offsets[i] >= vecSize) { | |
error(line, "vector field selection out of range", compString.c_str()); | |
return false; | |
} | |
if (i > 0) { | |
if (fieldSet[i] != fieldSet[i-1]) { | |
error(line, "illegal - vector component fields not from the same set", compString.c_str()); | |
return false; | |
} | |
} | |
} | |
return true; | |
} | |
// | |
// Look at a '.' field selector string and change it into offsets | |
// for a matrix. | |
// | |
bool TParseContext::parseMatrixFields(const TString& compString, int matSize, TMatrixFields& fields, const TSourceLoc& line) | |
{ | |
fields.wholeRow = false; | |
fields.wholeCol = false; | |
fields.row = -1; | |
fields.col = -1; | |
if (compString.size() != 2) { | |
error(line, "illegal length of matrix field selection", compString.c_str()); | |
return false; | |
} | |
if (compString[0] == '_') { | |
if (compString[1] < '0' || compString[1] > '3') { | |
error(line, "illegal matrix field selection", compString.c_str()); | |
return false; | |
} | |
fields.wholeCol = true; | |
fields.col = compString[1] - '0'; | |
} else if (compString[1] == '_') { | |
if (compString[0] < '0' || compString[0] > '3') { | |
error(line, "illegal matrix field selection", compString.c_str()); | |
return false; | |
} | |
fields.wholeRow = true; | |
fields.row = compString[0] - '0'; | |
} else { | |
if (compString[0] < '0' || compString[0] > '3' || | |
compString[1] < '0' || compString[1] > '3') { | |
error(line, "illegal matrix field selection", compString.c_str()); | |
return false; | |
} | |
fields.row = compString[0] - '0'; | |
fields.col = compString[1] - '0'; | |
} | |
if (fields.row >= matSize || fields.col >= matSize) { | |
error(line, "matrix field selection out of range", compString.c_str()); | |
return false; | |
} | |
return true; | |
} | |
/////////////////////////////////////////////////////////////////////// | |
// | |
// Errors | |
// | |
//////////////////////////////////////////////////////////////////////// | |
// | |
// Track whether errors have occurred. | |
// | |
void TParseContext::recover() | |
{ | |
} | |
// | |
// Used by flex/bison to output all syntax and parsing errors. | |
// | |
void TParseContext::error(const TSourceLoc& loc, | |
const char* reason, const char* token, | |
const char* extraInfo) | |
{ | |
pp::SourceLocation srcLoc; | |
srcLoc.file = loc.first_file; | |
srcLoc.line = loc.first_line; | |
diagnostics.writeInfo(pp::Diagnostics::ERROR, | |
srcLoc, reason, token, extraInfo); | |
} | |
void TParseContext::warning(const TSourceLoc& loc, | |
const char* reason, const char* token, | |
const char* extraInfo) { | |
pp::SourceLocation srcLoc; | |
srcLoc.file = loc.first_file; | |
srcLoc.line = loc.first_line; | |
diagnostics.writeInfo(pp::Diagnostics::WARNING, | |
srcLoc, reason, token, extraInfo); | |
} | |
void TParseContext::trace(const char* str) | |
{ | |
diagnostics.writeDebug(str); | |
} | |
// | |
// Same error message for all places assignments don't work. | |
// | |
void TParseContext::assignError(const TSourceLoc& line, const char* op, TString left, TString right) | |
{ | |
std::stringstream extraInfoStream; | |
extraInfoStream << "cannot convert from '" << right << "' to '" << left << "'"; | |
std::string extraInfo = extraInfoStream.str(); | |
error(line, "", op, extraInfo.c_str()); | |
} | |
// | |
// Same error message for all places unary operations don't work. | |
// | |
void TParseContext::unaryOpError(const TSourceLoc& line, const char* op, TString operand) | |
{ | |
std::stringstream extraInfoStream; | |
extraInfoStream << "no operation '" << op << "' exists that takes an operand of type " << operand | |
<< " (or there is no acceptable conversion)"; | |
std::string extraInfo = extraInfoStream.str(); | |
error(line, " wrong operand type", op, extraInfo.c_str()); | |
} | |
// | |
// Same error message for all binary operations don't work. | |
// | |
void TParseContext::binaryOpError(const TSourceLoc& line, const char* op, TString left, TString right) | |
{ | |
std::stringstream extraInfoStream; | |
extraInfoStream << "no operation '" << op << "' exists that takes a left-hand operand of type '" << left | |
<< "' and a right operand of type '" << right << "' (or there is no acceptable conversion)"; | |
std::string extraInfo = extraInfoStream.str(); | |
error(line, " wrong operand types ", op, extraInfo.c_str()); | |
} | |
bool TParseContext::precisionErrorCheck(const TSourceLoc& line, TPrecision precision, TBasicType type){ | |
if (!checksPrecisionErrors) | |
return false; | |
switch( type ){ | |
case EbtFloat: | |
if( precision == EbpUndefined ){ | |
error( line, "No precision specified for (float)", "" ); | |
return true; | |
} | |
break; | |
case EbtInt: | |
if( precision == EbpUndefined ){ | |
error( line, "No precision specified (int)", "" ); | |
return true; | |
} | |
break; | |
default: | |
return false; | |
} | |
return false; | |
} | |
// | |
// Both test and if necessary, spit out an error, to see if the node is really | |
// an l-value that can be operated on this way. | |
// | |
// Returns true if the was an error. | |
// | |
bool TParseContext::lValueErrorCheck(const TSourceLoc& line, const char* op, TIntermTyped* node) | |
{ | |
TIntermSymbol* symNode = node->getAsSymbolNode(); | |
TIntermBinary* binaryNode = node->getAsBinaryNode(); | |
if (binaryNode) { | |
bool errorReturn; | |
switch(binaryNode->getOp()) { | |
case EOpIndexDirect: | |
case EOpIndexIndirect: | |
case EOpIndexDirectStruct: | |
return lValueErrorCheck(line, op, binaryNode->getLeft()); | |
case EOpVectorSwizzle: | |
errorReturn = lValueErrorCheck(line, op, binaryNode->getLeft()); | |
if (!errorReturn) { | |
int offset[4] = {0,0,0,0}; | |
TIntermTyped* rightNode = binaryNode->getRight(); | |
TIntermAggregate *aggrNode = rightNode->getAsAggregate(); | |
for (TIntermSequence::iterator p = aggrNode->getSequence().begin(); | |
p != aggrNode->getSequence().end(); p++) { | |
int value = (*p)->getAsTyped()->getAsConstantUnion()->getIConst(0); | |
offset[value]++; | |
if (offset[value] > 1) { | |
error(line, " l-value of swizzle cannot have duplicate components", op); | |
return true; | |
} | |
} | |
} | |
return errorReturn; | |
default: | |
break; | |
} | |
error(line, " l-value required", op); | |
return true; | |
} | |
const char* symbol = 0; | |
if (symNode != 0) | |
symbol = symNode->getSymbol().c_str(); | |
const char* message = 0; | |
switch (node->getQualifier()) { | |
case EvqConst: message = "can't modify a const"; break; | |
case EvqConstReadOnly: message = "can't modify a const"; break; | |
case EvqAttribute: message = "can't modify an attribute"; break; | |
case EvqUniform: message = "can't modify a uniform"; break; | |
case EvqVaryingIn: message = "can't modify a varying"; break; | |
case EvqFragCoord: message = "can't modify gl_FragCoord"; break; | |
case EvqFrontFacing: message = "can't modify gl_FrontFacing"; break; | |
case EvqPointCoord: message = "can't modify gl_PointCoord"; break; | |
default: | |
// | |
// Type that can't be written to? | |
// | |
switch (node->getBasicType()) { | |
case EbtSampler2D: | |
case EbtSamplerCube: | |
message = "can't modify a sampler"; | |
break; | |
case EbtVoid: | |
message = "can't modify void"; | |
break; | |
default: | |
break; | |
} | |
} | |
if (message == 0 && binaryNode == 0 && symNode == 0) { | |
error(line, " l-value required", op); | |
return true; | |
} | |
// | |
// Everything else is okay, no error. | |
// | |
if (message == 0) | |
return false; | |
// | |
// If we get here, we have an error and a message. | |
// | |
if (symNode) { | |
std::stringstream extraInfoStream; | |
extraInfoStream << "\"" << symbol << "\" (" << message << ")"; | |
std::string extraInfo = extraInfoStream.str(); | |
error(line, " l-value required", op, extraInfo.c_str()); | |
} | |
else { | |
std::stringstream extraInfoStream; | |
extraInfoStream << "(" << message << ")"; | |
std::string extraInfo = extraInfoStream.str(); | |
error(line, " l-value required", op, extraInfo.c_str()); | |
} | |
return true; | |
} | |
// | |
// Both test, and if necessary spit out an error, to see if the node is really | |
// a constant. | |
// | |
// Returns true if the was an error. | |
// | |
bool TParseContext::constErrorCheck(TIntermTyped* node) | |
{ | |
if (node->getQualifier() == EvqConst) | |
return false; | |
error(node->getLine(), "constant expression required", ""); | |
return true; | |
} | |
// | |
// Both test, and if necessary spit out an error, to see if the node is really | |
// an integer. | |
// | |
// Returns true if the was an error. | |
// | |
bool TParseContext::integerErrorCheck(TIntermTyped* node, const char* token) | |
{ | |
if (node->getBasicType() == EbtInt && node->getNominalSize() == 1) | |
return false; | |
error(node->getLine(), "integer expression required", token); | |
return true; | |
} | |
// | |
// Both test, and if necessary spit out an error, to see if we are currently | |
// globally scoped. | |
// | |
// Returns true if the was an error. | |
// | |
bool TParseContext::globalErrorCheck(const TSourceLoc& line, bool global, const char* token) | |
{ | |
if (global) | |
return false; | |
error(line, "only allowed at global scope", token); | |
return true; | |
} | |
// | |
// For now, keep it simple: if it starts "gl_", it's reserved, independent | |
// of scope. Except, if the symbol table is at the built-in push-level, | |
// which is when we are parsing built-ins. | |
// Also checks for "webgl_" and "_webgl_" reserved identifiers if parsing a | |
// webgl shader. | |
// | |
// Returns true if there was an error. | |
// | |
bool TParseContext::reservedErrorCheck(const TSourceLoc& line, const TString& identifier) | |
{ | |
static const char* reservedErrMsg = "reserved built-in name"; | |
if (!symbolTable.atBuiltInLevel()) { | |
if (identifier.compare(0, 3, "gl_") == 0) { | |
error(line, reservedErrMsg, "gl_"); | |
return true; | |
} | |
if (isWebGLBasedSpec(shaderSpec)) { | |
if (identifier.compare(0, 6, "webgl_") == 0) { | |
error(line, reservedErrMsg, "webgl_"); | |
return true; | |
} | |
if (identifier.compare(0, 7, "_webgl_") == 0) { | |
error(line, reservedErrMsg, "_webgl_"); | |
return true; | |
} | |
if (shaderSpec == SH_CSS_SHADERS_SPEC && identifier.compare(0, 4, "css_") == 0) { | |
error(line, reservedErrMsg, "css_"); | |
return true; | |
} | |
} | |
if (identifier.find("__") != TString::npos) { | |
error(line, "identifiers containing two consecutive underscores (__) are reserved as possible future keywords", identifier.c_str()); | |
return true; | |
} | |
} | |
return false; | |
} | |
// | |
// Make sure there is enough data provided to the constructor to build | |
// something of the type of the constructor. Also returns the type of | |
// the constructor. | |
// | |
// Returns true if there was an error in construction. | |
// | |
bool TParseContext::constructorErrorCheck(const TSourceLoc& line, TIntermNode* node, TFunction& function, TOperator op, TType* type) | |
{ | |
*type = function.getReturnType(); | |
bool constructingMatrix = false; | |
switch(op) { | |
case EOpConstructMat2: | |
case EOpConstructMat3: | |
case EOpConstructMat4: | |
constructingMatrix = true; | |
break; | |
default: | |
break; | |
} | |
// | |
// Note: It's okay to have too many components available, but not okay to have unused | |
// arguments. 'full' will go to true when enough args have been seen. If we loop | |
// again, there is an extra argument, so 'overfull' will become true. | |
// | |
size_t size = 0; | |
bool constType = true; | |
bool full = false; | |
bool overFull = false; | |
bool matrixInMatrix = false; | |
bool arrayArg = false; | |
for (size_t i = 0; i < function.getParamCount(); ++i) { | |
const TParameter& param = function.getParam(i); | |
size += param.type->getObjectSize(); | |
if (constructingMatrix && param.type->isMatrix()) | |
matrixInMatrix = true; | |
if (full) | |
overFull = true; | |
if (op != EOpConstructStruct && !type->isArray() && size >= type->getObjectSize()) | |
full = true; | |
if (param.type->getQualifier() != EvqConst) | |
constType = false; | |
if (param.type->isArray()) | |
arrayArg = true; | |
} | |
if (constType) | |
type->setQualifier(EvqConst); | |
if (type->isArray() && static_cast<size_t>(type->getArraySize()) != function.getParamCount()) { | |
error(line, "array constructor needs one argument per array element", "constructor"); | |
return true; | |
} | |
if (arrayArg && op != EOpConstructStruct) { | |
error(line, "constructing from a non-dereferenced array", "constructor"); | |
return true; | |
} | |
if (matrixInMatrix && !type->isArray()) { | |
if (function.getParamCount() != 1) { | |
error(line, "constructing matrix from matrix can only take one argument", "constructor"); | |
return true; | |
} | |
} | |
if (overFull) { | |
error(line, "too many arguments", "constructor"); | |
return true; | |
} | |
if (op == EOpConstructStruct && !type->isArray() && int(type->getStruct()->fields().size()) != function.getParamCount()) { | |
error(line, "Number of constructor parameters does not match the number of structure fields", "constructor"); | |
return true; | |
} | |
if (!type->isMatrix() || !matrixInMatrix) { | |
if ((op != EOpConstructStruct && size != 1 && size < type->getObjectSize()) || | |
(op == EOpConstructStruct && size < type->getObjectSize())) { | |
error(line, "not enough data provided for construction", "constructor"); | |
return true; | |
} | |
} | |
TIntermTyped *typed = node ? node->getAsTyped() : 0; | |
if (typed == 0) { | |
error(line, "constructor argument does not have a type", "constructor"); | |
return true; | |
} | |
if (op != EOpConstructStruct && IsSampler(typed->getBasicType())) { | |
error(line, "cannot convert a sampler", "constructor"); | |
return true; | |
} | |
if (typed->getBasicType() == EbtVoid) { | |
error(line, "cannot convert a void", "constructor"); | |
return true; | |
} | |
return false; | |
} | |
// This function checks to see if a void variable has been declared and raise an error message for such a case | |
// | |
// returns true in case of an error | |
// | |
bool TParseContext::voidErrorCheck(const TSourceLoc& line, const TString& identifier, const TPublicType& pubType) | |
{ | |
if (pubType.type == EbtVoid) { | |
error(line, "illegal use of type 'void'", identifier.c_str()); | |
return true; | |
} | |
return false; | |
} | |
// This function checks to see if the node (for the expression) contains a scalar boolean expression or not | |
// | |
// returns true in case of an error | |
// | |
bool TParseContext::boolErrorCheck(const TSourceLoc& line, const TIntermTyped* type) | |
{ | |
if (type->getBasicType() != EbtBool || type->isArray() || type->isMatrix() || type->isVector()) { | |
error(line, "boolean expression expected", ""); | |
return true; | |
} | |
return false; | |
} | |
// This function checks to see if the node (for the expression) contains a scalar boolean expression or not | |
// | |
// returns true in case of an error | |
// | |
bool TParseContext::boolErrorCheck(const TSourceLoc& line, const TPublicType& pType) | |
{ | |
if (pType.type != EbtBool || pType.array || pType.matrix || (pType.size > 1)) { | |
error(line, "boolean expression expected", ""); | |
return true; | |
} | |
return false; | |
} | |
bool TParseContext::samplerErrorCheck(const TSourceLoc& line, const TPublicType& pType, const char* reason) | |
{ | |
if (pType.type == EbtStruct) { | |
if (containsSampler(*pType.userDef)) { | |
error(line, reason, getBasicString(pType.type), "(structure contains a sampler)"); | |
return true; | |
} | |
return false; | |
} else if (IsSampler(pType.type)) { | |
error(line, reason, getBasicString(pType.type)); | |
return true; | |
} | |
return false; | |
} | |
bool TParseContext::structQualifierErrorCheck(const TSourceLoc& line, const TPublicType& pType) | |
{ | |
if ((pType.qualifier == EvqVaryingIn || pType.qualifier == EvqVaryingOut || pType.qualifier == EvqAttribute) && | |
pType.type == EbtStruct) { | |
error(line, "cannot be used with a structure", getQualifierString(pType.qualifier)); | |
return true; | |
} | |
if (pType.qualifier != EvqUniform && samplerErrorCheck(line, pType, "samplers must be uniform")) | |
return true; | |
return false; | |
} | |
bool TParseContext::parameterSamplerErrorCheck(const TSourceLoc& line, TQualifier qualifier, const TType& type) | |
{ | |
if ((qualifier == EvqOut || qualifier == EvqInOut) && | |
type.getBasicType() != EbtStruct && IsSampler(type.getBasicType())) { | |
error(line, "samplers cannot be output parameters", type.getBasicString()); | |
return true; | |
} | |
return false; | |
} | |
bool TParseContext::containsSampler(TType& type) | |
{ | |
if (IsSampler(type.getBasicType())) | |
return true; | |
if (type.getBasicType() == EbtStruct) { | |
const TFieldList& fields = type.getStruct()->fields(); | |
for (unsigned int i = 0; i < fields.size(); ++i) { | |
if (containsSampler(*fields[i]->type())) | |
return true; | |
} | |
} | |
return false; | |
} | |
// | |
// Do size checking for an array type's size. | |
// | |
// Returns true if there was an error. | |
// | |
bool TParseContext::arraySizeErrorCheck(const TSourceLoc& line, TIntermTyped* expr, int& size) | |
{ | |
TIntermConstantUnion* constant = expr->getAsConstantUnion(); | |
if (constant == 0 || constant->getBasicType() != EbtInt) { | |
error(line, "array size must be a constant integer expression", ""); | |
return true; | |
} | |
size = constant->getIConst(0); | |
if (size <= 0) { | |
error(line, "array size must be a positive integer", ""); | |
size = 1; | |
return true; | |
} | |
return false; | |
} | |
// | |
// See if this qualifier can be an array. | |
// | |
// Returns true if there is an error. | |
// | |
bool TParseContext::arrayQualifierErrorCheck(const TSourceLoc& line, TPublicType type) | |
{ | |
if ((type.qualifier == EvqAttribute) || (type.qualifier == EvqConst)) { | |
error(line, "cannot declare arrays of this qualifier", TType(type).getCompleteString().c_str()); | |
return true; | |
} | |
return false; | |
} | |
// | |
// See if this type can be an array. | |
// | |
// Returns true if there is an error. | |
// | |
bool TParseContext::arrayTypeErrorCheck(const TSourceLoc& line, TPublicType type) | |
{ | |
// | |
// Can the type be an array? | |
// | |
if (type.array) { | |
error(line, "cannot declare arrays of arrays", TType(type).getCompleteString().c_str()); | |
return true; | |
} | |
return false; | |
} | |
// | |
// Do all the semantic checking for declaring an array, with and | |
// without a size, and make the right changes to the symbol table. | |
// | |
// size == 0 means no specified size. | |
// | |
// Returns true if there was an error. | |
// | |
bool TParseContext::arrayErrorCheck(const TSourceLoc& line, TString& identifier, TPublicType type, TVariable*& variable) | |
{ | |
// | |
// Don't check for reserved word use until after we know it's not in the symbol table, | |
// because reserved arrays can be redeclared. | |
// | |
bool builtIn = false; | |
bool sameScope = false; | |
TSymbol* symbol = symbolTable.find(identifier, &builtIn, &sameScope); | |
if (symbol == 0 || !sameScope) { | |
if (reservedErrorCheck(line, identifier)) | |
return true; | |
variable = new TVariable(&identifier, TType(type)); | |
if (type.arraySize) | |
variable->getType().setArraySize(type.arraySize); | |
if (! symbolTable.insert(*variable)) { | |
delete variable; | |
error(line, "INTERNAL ERROR inserting new symbol", identifier.c_str()); | |
return true; | |
} | |
} else { | |
if (! symbol->isVariable()) { | |
error(line, "variable expected", identifier.c_str()); | |
return true; | |
} | |
variable = static_cast<TVariable*>(symbol); | |
if (! variable->getType().isArray()) { | |
error(line, "redeclaring non-array as array", identifier.c_str()); | |
return true; | |
} | |
if (variable->getType().getArraySize() > 0) { | |
error(line, "redeclaration of array with size", identifier.c_str()); | |
return true; | |
} | |
if (! variable->getType().sameElementType(TType(type))) { | |
error(line, "redeclaration of array with a different type", identifier.c_str()); | |
return true; | |
} | |
if (type.arraySize) | |
variable->getType().setArraySize(type.arraySize); | |
} | |
if (voidErrorCheck(line, identifier, type)) | |
return true; | |
return false; | |
} | |
// | |
// Enforce non-initializer type/qualifier rules. | |
// | |
// Returns true if there was an error. | |
// | |
bool TParseContext::nonInitConstErrorCheck(const TSourceLoc& line, TString& identifier, TPublicType& type, bool array) | |
{ | |
if (type.qualifier == EvqConst) | |
{ | |
// Make the qualifier make sense. | |
type.qualifier = EvqTemporary; | |
if (array) | |
{ | |
error(line, "arrays may not be declared constant since they cannot be initialized", identifier.c_str()); | |
} | |
else if (type.isStructureContainingArrays()) | |
{ | |
error(line, "structures containing arrays may not be declared constant since they cannot be initialized", identifier.c_str()); | |
} | |
else | |
{ | |
error(line, "variables with qualifier 'const' must be initialized", identifier.c_str()); | |
} | |
return true; | |
} | |
return false; | |
} | |
// | |
// Do semantic checking for a variable declaration that has no initializer, | |
// and update the symbol table. | |
// | |
// Returns true if there was an error. | |
// | |
bool TParseContext::nonInitErrorCheck(const TSourceLoc& line, TString& identifier, TPublicType& type, TVariable*& variable) | |
{ | |
if (reservedErrorCheck(line, identifier)) | |
recover(); | |
variable = new TVariable(&identifier, TType(type)); | |
if (! symbolTable.insert(*variable)) { | |
error(line, "redefinition", variable->getName().c_str()); | |
delete variable; | |
variable = 0; | |
return true; | |
} | |
if (voidErrorCheck(line, identifier, type)) | |
return true; | |
return false; | |
} | |
bool TParseContext::paramErrorCheck(const TSourceLoc& line, TQualifier qualifier, TQualifier paramQualifier, TType* type) | |
{ | |
if (qualifier != EvqConst && qualifier != EvqTemporary) { | |
error(line, "qualifier not allowed on function parameter", getQualifierString(qualifier)); | |
return true; | |
} | |
if (qualifier == EvqConst && paramQualifier != EvqIn) { | |
error(line, "qualifier not allowed with ", getQualifierString(qualifier), getQualifierString(paramQualifier)); | |
return true; | |
} | |
if (qualifier == EvqConst) | |
type->setQualifier(EvqConstReadOnly); | |
else | |
type->setQualifier(paramQualifier); | |
return false; | |
} | |
bool TParseContext::extensionErrorCheck(const TSourceLoc& line, const TString& extension) | |
{ | |
const TExtensionBehavior& extBehavior = extensionBehavior(); | |
TExtensionBehavior::const_iterator iter = extBehavior.find(extension.c_str()); | |
if (iter == extBehavior.end()) { | |
error(line, "extension", extension.c_str(), "is not supported"); | |
return true; | |
} | |
// In GLSL ES, an extension's default behavior is "disable". | |
if (iter->second == EBhDisable || iter->second == EBhUndefined) { | |
error(line, "extension", extension.c_str(), "is disabled"); | |
return true; | |
} | |
if (iter->second == EBhWarn) { | |
warning(line, "extension", extension.c_str(), "is being used"); | |
return false; | |
} | |
return false; | |
} | |
bool TParseContext::supportsExtension(const char* extension) | |
{ | |
const TExtensionBehavior& extbehavior = extensionBehavior(); | |
TExtensionBehavior::const_iterator iter = extbehavior.find(extension); | |
return (iter != extbehavior.end()); | |
} | |
bool TParseContext::isExtensionEnabled(const char* extension) const | |
{ | |
const TExtensionBehavior& extbehavior = extensionBehavior(); | |
TExtensionBehavior::const_iterator iter = extbehavior.find(extension); | |
if (iter == extbehavior.end()) | |
{ | |
return false; | |
} | |
return (iter->second == EBhEnable || iter->second == EBhRequire); | |
} | |
///////////////////////////////////////////////////////////////////////////////// | |
// | |
// Non-Errors. | |
// | |
///////////////////////////////////////////////////////////////////////////////// | |
// | |
// Look up a function name in the symbol table, and make sure it is a function. | |
// | |
// Return the function symbol if found, otherwise 0. | |
// | |
const TFunction* TParseContext::findFunction(const TSourceLoc& line, TFunction* call, bool *builtIn) | |
{ | |
// First find by unmangled name to check whether the function name has been | |
// hidden by a variable name or struct typename. | |
// If a function is found, check for one with a matching argument list. | |
const TSymbol* symbol = symbolTable.find(call->getName(), builtIn); | |
if (symbol == 0 || symbol->isFunction()) { | |
symbol = symbolTable.find(call->getMangledName(), builtIn); | |
} | |
if (symbol == 0) { | |
error(line, "no matching overloaded function found", call->getName().c_str()); | |
return 0; | |
} | |
if (!symbol->isFunction()) { | |
error(line, "function name expected", call->getName().c_str()); | |
return 0; | |
} | |
return static_cast<const TFunction*>(symbol); | |
} | |
// | |
// Initializers show up in several places in the grammar. Have one set of | |
// code to handle them here. | |
// | |
bool TParseContext::executeInitializer(const TSourceLoc& line, TString& identifier, TPublicType& pType, | |
TIntermTyped* initializer, TIntermNode*& intermNode, TVariable* variable) | |
{ | |
TType type = TType(pType); | |
if (variable == 0) { | |
if (reservedErrorCheck(line, identifier)) | |
return true; | |
if (voidErrorCheck(line, identifier, pType)) | |
return true; | |
// | |
// add variable to symbol table | |
// | |
variable = new TVariable(&identifier, type); | |
if (! symbolTable.insert(*variable)) { | |
error(line, "redefinition", variable->getName().c_str()); | |
return true; | |
// don't delete variable, it's used by error recovery, and the pool | |
// pop will take care of the memory | |
} | |
} | |
// | |
// identifier must be of type constant, a global, or a temporary | |
// | |
TQualifier qualifier = variable->getType().getQualifier(); | |
if ((qualifier != EvqTemporary) && (qualifier != EvqGlobal) && (qualifier != EvqConst)) { | |
error(line, " cannot initialize this type of qualifier ", variable->getType().getQualifierString()); | |
return true; | |
} | |
// | |
// test for and propagate constant | |
// | |
if (qualifier == EvqConst) { | |
if (qualifier != initializer->getType().getQualifier()) { | |
std::stringstream extraInfoStream; | |
extraInfoStream << "'" << variable->getType().getCompleteString() << "'"; | |
std::string extraInfo = extraInfoStream.str(); | |
error(line, " assigning non-constant to", "=", extraInfo.c_str()); | |
variable->getType().setQualifier(EvqTemporary); | |
return true; | |
} | |
if (type != initializer->getType()) { | |
error(line, " non-matching types for const initializer ", | |
variable->getType().getQualifierString()); | |
variable->getType().setQualifier(EvqTemporary); | |
return true; | |
} | |
if (initializer->getAsConstantUnion()) { | |
variable->shareConstPointer(initializer->getAsConstantUnion()->getUnionArrayPointer()); | |
} else if (initializer->getAsSymbolNode()) { | |
const TSymbol* symbol = symbolTable.find(initializer->getAsSymbolNode()->getSymbol()); | |
const TVariable* tVar = static_cast<const TVariable*>(symbol); | |
ConstantUnion* constArray = tVar->getConstPointer(); | |
variable->shareConstPointer(constArray); | |
} else { | |
std::stringstream extraInfoStream; | |
extraInfoStream << "'" << variable->getType().getCompleteString() << "'"; | |
std::string extraInfo = extraInfoStream.str(); | |
error(line, " cannot assign to", "=", extraInfo.c_str()); | |
variable->getType().setQualifier(EvqTemporary); | |
return true; | |
} | |
} | |
if (qualifier != EvqConst) { | |
TIntermSymbol* intermSymbol = intermediate.addSymbol(variable->getUniqueId(), variable->getName(), variable->getType(), line); | |
intermNode = intermediate.addAssign(EOpInitialize, intermSymbol, initializer, line); | |
if (intermNode == 0) { | |
assignError(line, "=", intermSymbol->getCompleteString(), initializer->getCompleteString()); | |
return true; | |
} | |
} else | |
intermNode = 0; | |
return false; | |
} | |
bool TParseContext::areAllChildConst(TIntermAggregate* aggrNode) | |
{ | |
ASSERT(aggrNode != NULL); | |
if (!aggrNode->isConstructor()) | |
return false; | |
bool allConstant = true; | |
// check if all the child nodes are constants so that they can be inserted into | |
// the parent node | |
TIntermSequence &sequence = aggrNode->getSequence() ; | |
for (TIntermSequence::iterator p = sequence.begin(); p != sequence.end(); ++p) { | |
if (!(*p)->getAsTyped()->getAsConstantUnion()) | |
return false; | |
} | |
return allConstant; | |
} | |
// This function is used to test for the correctness of the parameters passed to various constructor functions | |
// and also convert them to the right datatype if it is allowed and required. | |
// | |
// Returns 0 for an error or the constructed node (aggregate or typed) for no error. | |
// | |
TIntermTyped* TParseContext::addConstructor(TIntermNode* node, const TType* type, TOperator op, TFunction* fnCall, const TSourceLoc& line) | |
{ | |
if (node == 0) | |
return 0; | |
TIntermAggregate* aggrNode = node->getAsAggregate(); | |
TFieldList::const_iterator memberFields; | |
if (op == EOpConstructStruct) | |
memberFields = type->getStruct()->fields().begin(); | |
TType elementType = *type; | |
if (type->isArray()) | |
elementType.clearArrayness(); | |
bool singleArg; | |
if (aggrNode) { | |
if (aggrNode->getOp() != EOpNull || aggrNode->getSequence().size() == 1) | |
singleArg = true; | |
else | |
singleArg = false; | |
} else | |
singleArg = true; | |
TIntermTyped *newNode; | |
if (singleArg) { | |
// If structure constructor or array constructor is being called | |
// for only one parameter inside the structure, we need to call constructStruct function once. | |
if (type->isArray()) | |
newNode = constructStruct(node, &elementType, 1, node->getLine(), false); | |
else if (op == EOpConstructStruct) | |
newNode = constructStruct(node, (*memberFields)->type(), 1, node->getLine(), false); | |
else | |
newNode = constructBuiltIn(type, op, node, node->getLine(), false); | |
if (newNode && newNode->getAsAggregate()) { | |
TIntermTyped* constConstructor = foldConstConstructor(newNode->getAsAggregate(), *type); | |
if (constConstructor) | |
return constConstructor; | |
} | |
return newNode; | |
} | |
// | |
// Handle list of arguments. | |
// | |
TIntermSequence &sequenceVector = aggrNode->getSequence() ; // Stores the information about the parameter to the constructor | |
// if the structure constructor contains more than one parameter, then construct | |
// each parameter | |
int paramCount = 0; // keeps a track of the constructor parameter number being checked | |
// for each parameter to the constructor call, check to see if the right type is passed or convert them | |
// to the right type if possible (and allowed). | |
// for structure constructors, just check if the right type is passed, no conversion is allowed. | |
for (TIntermSequence::iterator p = sequenceVector.begin(); | |
p != sequenceVector.end(); p++, paramCount++) { | |
if (type->isArray()) | |
newNode = constructStruct(*p, &elementType, paramCount+1, node->getLine(), true); | |
else if (op == EOpConstructStruct) | |
newNode = constructStruct(*p, memberFields[paramCount]->type(), paramCount+1, node->getLine(), true); | |
else | |
newNode = constructBuiltIn(type, op, *p, node->getLine(), true); | |
if (newNode) { | |
*p = newNode; | |
} | |
} | |
TIntermTyped* constructor = intermediate.setAggregateOperator(aggrNode, op, line); | |
TIntermTyped* constConstructor = foldConstConstructor(constructor->getAsAggregate(), *type); | |
if (constConstructor) | |
return constConstructor; | |
return constructor; | |
} | |
TIntermTyped* TParseContext::foldConstConstructor(TIntermAggregate* aggrNode, const TType& type) | |
{ | |
bool canBeFolded = areAllChildConst(aggrNode); | |
aggrNode->setType(type); | |
if (canBeFolded) { | |
bool returnVal = false; | |
ConstantUnion* unionArray = new ConstantUnion[type.getObjectSize()]; | |
if (aggrNode->getSequence().size() == 1) { | |
returnVal = intermediate.parseConstTree(aggrNode->getLine(), aggrNode, unionArray, aggrNode->getOp(), symbolTable, type, true); | |
} | |
else { | |
returnVal = intermediate.parseConstTree(aggrNode->getLine(), aggrNode, unionArray, aggrNode->getOp(), symbolTable, type); | |
} | |
if (returnVal) | |
return 0; | |
return intermediate.addConstantUnion(unionArray, type, aggrNode->getLine()); | |
} | |
return 0; | |
} | |
// Function for constructor implementation. Calls addUnaryMath with appropriate EOp value | |
// for the parameter to the constructor (passed to this function). Essentially, it converts | |
// the parameter types correctly. If a constructor expects an int (like ivec2) and is passed a | |
// float, then float is converted to int. | |
// | |
// Returns 0 for an error or the constructed node. | |
// | |
TIntermTyped* TParseContext::constructBuiltIn(const TType* type, TOperator op, TIntermNode* node, const TSourceLoc& line, bool subset) | |
{ | |
TIntermTyped* newNode; | |
TOperator basicOp; | |
// | |
// First, convert types as needed. | |
// | |
switch (op) { | |
case EOpConstructVec2: | |
case EOpConstructVec3: | |
case EOpConstructVec4: | |
case EOpConstructMat2: | |
case EOpConstructMat3: | |
case EOpConstructMat4: | |
case EOpConstructFloat: | |
basicOp = EOpConstructFloat; | |
break; | |
case EOpConstructIVec2: | |
case EOpConstructIVec3: | |
case EOpConstructIVec4: | |
case EOpConstructInt: | |
basicOp = EOpConstructInt; | |
break; | |
case EOpConstructBVec2: | |
case EOpConstructBVec3: | |
case EOpConstructBVec4: | |
case EOpConstructBool: | |
basicOp = EOpConstructBool; | |
break; | |
default: | |
error(line, "unsupported construction", ""); | |
recover(); | |
return 0; | |
} | |
newNode = intermediate.addUnaryMath(basicOp, node, node->getLine(), symbolTable); | |
if (newNode == 0) { | |
error(line, "can't convert", "constructor"); | |
return 0; | |
} | |
// | |
// Now, if there still isn't an operation to do the construction, and we need one, add one. | |
// | |
// Otherwise, skip out early. | |
if (subset || (newNode != node && newNode->getType() == *type)) | |
return newNode; | |
// setAggregateOperator will insert a new node for the constructor, as needed. | |
return intermediate.setAggregateOperator(newNode, op, line); | |
} | |
// This function tests for the type of the parameters to the structures constructors. Raises | |
// an error message if the expected type does not match the parameter passed to the constructor. | |
// | |
// Returns 0 for an error or the input node itself if the expected and the given parameter types match. | |
// | |
TIntermTyped* TParseContext::constructStruct(TIntermNode* node, TType* type, int paramCount, const TSourceLoc& line, bool subset) | |
{ | |
if (*type == node->getAsTyped()->getType()) { | |
if (subset) | |
return node->getAsTyped(); | |
else | |
return intermediate.setAggregateOperator(node->getAsTyped(), EOpConstructStruct, line); | |
} else { | |
std::stringstream extraInfoStream; | |
extraInfoStream << "cannot convert parameter " << paramCount | |
<< " from '" << node->getAsTyped()->getType().getBasicString() | |
<< "' to '" << type->getBasicString() << "'"; | |
std::string extraInfo = extraInfoStream.str(); | |
error(line, "", "constructor", extraInfo.c_str()); | |
recover(); | |
} | |
return 0; | |
} | |
// | |
// This function returns the tree representation for the vector field(s) being accessed from contant vector. | |
// If only one component of vector is accessed (v.x or v[0] where v is a contant vector), then a contant node is | |
// returned, else an aggregate node is returned (for v.xy). The input to this function could either be the symbol | |
// node or it could be the intermediate tree representation of accessing fields in a constant structure or column of | |
// a constant matrix. | |
// | |
TIntermTyped* TParseContext::addConstVectorNode(TVectorFields& fields, TIntermTyped* node, const TSourceLoc& line) | |
{ | |
TIntermTyped* typedNode; | |
TIntermConstantUnion* tempConstantNode = node->getAsConstantUnion(); | |
ConstantUnion *unionArray; | |
if (tempConstantNode) { | |
unionArray = tempConstantNode->getUnionArrayPointer(); | |
if (!unionArray) { | |
return node; | |
} | |
} else { // The node has to be either a symbol node or an aggregate node or a tempConstant node, else, its an error | |
error(line, "Cannot offset into the vector", "Error"); | |
recover(); | |
return 0; | |
} | |
ConstantUnion* constArray = new ConstantUnion[fields.num]; | |
for (int i = 0; i < fields.num; i++) { | |
if (fields.offsets[i] >= node->getType().getNominalSize()) { | |
std::stringstream extraInfoStream; | |
extraInfoStream << "vector field selection out of range '" << fields.offsets[i] << "'"; | |
std::string extraInfo = extraInfoStream.str(); | |
error(line, "", "[", extraInfo.c_str()); | |
recover(); | |
fields.offsets[i] = 0; | |
} | |
constArray[i] = unionArray[fields.offsets[i]]; | |
} | |
typedNode = intermediate.addConstantUnion(constArray, node->getType(), line); | |
return typedNode; | |
} | |
// | |
// This function returns the column being accessed from a constant matrix. The values are retrieved from | |
// the symbol table and parse-tree is built for a vector (each column of a matrix is a vector). The input | |
// to the function could either be a symbol node (m[0] where m is a constant matrix)that represents a | |
// constant matrix or it could be the tree representation of the constant matrix (s.m1[0] where s is a constant structure) | |
// | |
TIntermTyped* TParseContext::addConstMatrixNode(int index, TIntermTyped* node, const TSourceLoc& line) | |
{ | |
TIntermTyped* typedNode; | |
TIntermConstantUnion* tempConstantNode = node->getAsConstantUnion(); | |
if (index >= node->getType().getNominalSize()) { | |
std::stringstream extraInfoStream; | |
extraInfoStream << "matrix field selection out of range '" << index << "'"; | |
std::string extraInfo = extraInfoStream.str(); | |
error(line, "", "[", extraInfo.c_str()); | |
recover(); | |
index = 0; | |
} | |
if (tempConstantNode) { | |
ConstantUnion* unionArray = tempConstantNode->getUnionArrayPointer(); | |
int size = tempConstantNode->getType().getNominalSize(); | |
typedNode = intermediate.addConstantUnion(&unionArray[size*index], tempConstantNode->getType(), line); | |
} else { | |
error(line, "Cannot offset into the matrix", "Error"); | |
recover(); | |
return 0; | |
} | |
return typedNode; | |
} | |
// | |
// This function returns an element of an array accessed from a constant array. The values are retrieved from | |
// the symbol table and parse-tree is built for the type of the element. The input | |
// to the function could either be a symbol node (a[0] where a is a constant array)that represents a | |
// constant array or it could be the tree representation of the constant array (s.a1[0] where s is a constant structure) | |
// | |
TIntermTyped* TParseContext::addConstArrayNode(int index, TIntermTyped* node, const TSourceLoc& line) | |
{ | |
TIntermTyped* typedNode; | |
TIntermConstantUnion* tempConstantNode = node->getAsConstantUnion(); | |
TType arrayElementType = node->getType(); | |
arrayElementType.clearArrayness(); | |
if (index >= node->getType().getArraySize()) { | |
std::stringstream extraInfoStream; | |
extraInfoStream << "array field selection out of range '" << index << "'"; | |
std::string extraInfo = extraInfoStream.str(); | |
error(line, "", "[", extraInfo.c_str()); | |
recover(); | |
index = 0; | |
} | |
if (tempConstantNode) { | |
size_t arrayElementSize = arrayElementType.getObjectSize(); | |
ConstantUnion* unionArray = tempConstantNode->getUnionArrayPointer(); | |
typedNode = intermediate.addConstantUnion(&unionArray[arrayElementSize * index], tempConstantNode->getType(), line); | |
} else { | |
error(line, "Cannot offset into the array", "Error"); | |
recover(); | |
return 0; | |
} | |
return typedNode; | |
} | |
// | |
// This function returns the value of a particular field inside a constant structure from the symbol table. | |
// If there is an embedded/nested struct, it appropriately calls addConstStructNested or addConstStructFromAggr | |
// function and returns the parse-tree with the values of the embedded/nested struct. | |
// | |
TIntermTyped* TParseContext::addConstStruct(TString& identifier, TIntermTyped* node, const TSourceLoc& line) | |
{ | |
const TFieldList& fields = node->getType().getStruct()->fields(); | |
size_t instanceSize = 0; | |
for (size_t index = 0; index < fields.size(); ++index) { | |
if (fields[index]->name() == identifier) { | |
break; | |
} else { | |
instanceSize += fields[index]->type()->getObjectSize(); | |
} | |
} | |
TIntermTyped* typedNode = 0; | |
TIntermConstantUnion* tempConstantNode = node->getAsConstantUnion(); | |
if (tempConstantNode) { | |
ConstantUnion* constArray = tempConstantNode->getUnionArrayPointer(); | |
typedNode = intermediate.addConstantUnion(constArray+instanceSize, tempConstantNode->getType(), line); // type will be changed in the calling function | |
} else { | |
error(line, "Cannot offset into the structure", "Error"); | |
recover(); | |
return 0; | |
} | |
return typedNode; | |
} | |
bool TParseContext::enterStructDeclaration(const TSourceLoc& line, const TString& identifier) | |
{ | |
++structNestingLevel; | |
// Embedded structure definitions are not supported per GLSL ES spec. | |
// They aren't allowed in GLSL either, but we need to detect this here | |
// so we don't rely on the GLSL compiler to catch it. | |
if (structNestingLevel > 1) { | |
error(line, "", "Embedded struct definitions are not allowed"); | |
return true; | |
} | |
return false; | |
} | |
void TParseContext::exitStructDeclaration() | |
{ | |
--structNestingLevel; | |
} | |
namespace { | |
const int kWebGLMaxStructNesting = 4; | |
} // namespace | |
bool TParseContext::structNestingErrorCheck(const TSourceLoc& line, const TField& field) | |
{ | |
if (!isWebGLBasedSpec(shaderSpec)) { | |
return false; | |
} | |
if (field.type()->getBasicType() != EbtStruct) { | |
return false; | |
} | |
// We're already inside a structure definition at this point, so add | |
// one to the field's struct nesting. | |
if (1 + field.type()->getDeepestStructNesting() > kWebGLMaxStructNesting) { | |
std::stringstream reasonStream; | |
reasonStream << "Reference of struct type " | |
<< field.type()->getStruct()->name().c_str() | |
<< " exceeds maximum allowed nesting level of " | |
<< kWebGLMaxStructNesting; | |
std::string reason = reasonStream.str(); | |
error(line, reason.c_str(), field.name().c_str(), ""); | |
return true; | |
} | |
return false; | |
} | |
// | |
// Parse an array index expression | |
// | |
TIntermTyped* TParseContext::addIndexExpression(TIntermTyped *baseExpression, const TSourceLoc& location, TIntermTyped *indexExpression) | |
{ | |
TIntermTyped *indexedExpression = NULL; | |
if (!baseExpression->isArray() && !baseExpression->isMatrix() && !baseExpression->isVector()) | |
{ | |
if (baseExpression->getAsSymbolNode()) | |
{ | |
error(location, " left of '[' is not of type array, matrix, or vector ", baseExpression->getAsSymbolNode()->getSymbol().c_str()); | |
} | |
else | |
{ | |
error(location, " left of '[' is not of type array, matrix, or vector ", "expression"); | |
} | |
recover(); | |
} | |
if (indexExpression->getQualifier() == EvqConst) | |
{ | |
int index = indexExpression->getAsConstantUnion()->getIConst(0); | |
if (index < 0) | |
{ | |
std::stringstream infoStream; | |
infoStream << index; | |
std::string info = infoStream.str(); | |
error(location, "negative index", info.c_str()); | |
recover(); | |
index = 0; | |
} | |
if (baseExpression->getType().getQualifier() == EvqConst) | |
{ | |
if (baseExpression->isArray()) | |
{ | |
// constant folding for arrays | |
indexedExpression = addConstArrayNode(index, baseExpression, location); | |
} | |
else if (baseExpression->isVector()) | |
{ | |
// constant folding for vectors | |
TVectorFields fields; | |
fields.num = 1; | |
fields.offsets[0] = index; // need to do it this way because v.xy sends fields integer array | |
indexedExpression = addConstVectorNode(fields, baseExpression, location); | |
} | |
else if (baseExpression->isMatrix()) | |
{ | |
// constant folding for matrices | |
indexedExpression = addConstMatrixNode(index, baseExpression, location); | |
} | |
} | |
else | |
{ | |
if (baseExpression->isArray()) | |
{ | |
if (index >= baseExpression->getType().getArraySize()) | |
{ | |
std::stringstream extraInfoStream; | |
extraInfoStream << "array index out of range '" << index << "'"; | |
std::string extraInfo = extraInfoStream.str(); | |
error(location, "", "[", extraInfo.c_str()); | |
recover(); | |
index = baseExpression->getType().getArraySize() - 1; | |
} | |
else if (baseExpression->getQualifier() == EvqFragData && index > 0 && !isExtensionEnabled("GL_EXT_draw_buffers")) | |
{ | |
error(location, "", "[", "array indexes for gl_FragData must be zero when GL_EXT_draw_buffers is disabled"); | |
recover(); | |
index = 0; | |
} | |
} | |
else if ((baseExpression->isVector() || baseExpression->isMatrix()) && baseExpression->getType().getNominalSize() <= index) | |
{ | |
std::stringstream extraInfoStream; | |
extraInfoStream << "field selection out of range '" << index << "'"; | |
std::string extraInfo = extraInfoStream.str(); | |
error(location, "", "[", extraInfo.c_str()); | |
recover(); | |
index = baseExpression->getType().getNominalSize() - 1; | |
} | |
indexExpression->getAsConstantUnion()->getUnionArrayPointer()->setIConst(index); | |
indexedExpression = intermediate.addIndex(EOpIndexDirect, baseExpression, indexExpression, location); | |
} | |
} | |
else | |
{ | |
indexedExpression = intermediate.addIndex(EOpIndexIndirect, baseExpression, indexExpression, location); | |
} | |
if (indexedExpression == 0) | |
{ | |
ConstantUnion *unionArray = new ConstantUnion[1]; | |
unionArray->setFConst(0.0f); | |
indexedExpression = intermediate.addConstantUnion(unionArray, TType(EbtFloat, EbpHigh, EvqConst), location); | |
} | |
else if (baseExpression->isArray()) | |
{ | |
const TType &baseType = baseExpression->getType(); | |
if (baseType.getStruct()) | |
{ | |
TType copyOfType(baseType.getStruct()); | |
indexedExpression->setType(copyOfType); | |
} | |
else | |
{ | |
indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision(), EvqTemporary, baseExpression->getNominalSize(), baseExpression->isMatrix())); | |
} | |
if (baseExpression->getType().getQualifier() == EvqConst) | |
{ | |
indexedExpression->getTypePointer()->setQualifier(EvqConst); | |
} | |
} | |
else if (baseExpression->isMatrix()) | |
{ | |
TQualifier qualifier = baseExpression->getType().getQualifier() == EvqConst ? EvqConst : EvqTemporary; | |
indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision(), qualifier, baseExpression->getNominalSize())); | |
} | |
else if (baseExpression->isVector()) | |
{ | |
TQualifier qualifier = baseExpression->getType().getQualifier() == EvqConst ? EvqConst : EvqTemporary; | |
indexedExpression->setType(TType(baseExpression->getBasicType(), baseExpression->getPrecision(), qualifier)); | |
} | |
else | |
{ | |
indexedExpression->setType(baseExpression->getType()); | |
} | |
return indexedExpression; | |
} | |
// | |
// Parse an array of strings using yyparse. | |
// | |
// Returns 0 for success. | |
// | |
int PaParseStrings(size_t count, const char* const string[], const int length[], | |
TParseContext* context) { | |
if ((count == 0) || (string == NULL)) | |
return 1; | |
if (glslang_initialize(context)) | |
return 1; | |
int error = glslang_scan(count, string, length, context); | |
if (!error) | |
error = glslang_parse(context); | |
glslang_finalize(context); | |
return (error == 0) && (context->numErrors() == 0) ? 0 : 1; | |
} | |