diff options
Diffstat (limited to 'src/3rdparty/angle/src/compiler/translator/glslang.y')
| -rw-r--r-- | src/3rdparty/angle/src/compiler/translator/glslang.y | 2014 |
1 files changed, 2014 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/compiler/translator/glslang.y b/src/3rdparty/angle/src/compiler/translator/glslang.y new file mode 100644 index 0000000000..7614ff3447 --- /dev/null +++ b/src/3rdparty/angle/src/compiler/translator/glslang.y @@ -0,0 +1,2014 @@ +/* +// +// 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. +// + +This file contains the Yacc grammar for GLSL ES. +Based on ANSI C Yacc grammar: +http://www.lysator.liu.se/c/ANSI-C-grammar-y.html + +IF YOU MODIFY THIS FILE YOU ALSO NEED TO RUN generate_parser.sh, +WHICH GENERATES THE GLSL ES PARSER (glslang_tab.cpp AND glslang_tab.h). +*/ + +%{ +// +// Copyright (c) 2002-2010 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. +// + +// This file is auto-generated by generate_parser.sh. DO NOT EDIT! + +// Ignore errors in auto-generated code. +#if defined(__GNUC__) +#pragma GCC diagnostic ignored "-Wunused-function" +#pragma GCC diagnostic ignored "-Wunused-variable" +#pragma GCC diagnostic ignored "-Wswitch-enum" +#elif defined(_MSC_VER) +#pragma warning(disable: 4065) +#pragma warning(disable: 4189) +#pragma warning(disable: 4505) +#pragma warning(disable: 4701) +#endif + +#include "compiler/translator/SymbolTable.h" +#include "compiler/translator/ParseContext.h" +#include "GLSLANG/ShaderLang.h" + +#define YYENABLE_NLS 0 + +#define YYLEX_PARAM context->scanner +%} + +%expect 1 /* One shift reduce conflict because of if | else */ +%pure-parser +%parse-param {TParseContext* context} +%locations + +%code requires { +#define YYLTYPE TSourceLoc +#define YYLTYPE_IS_DECLARED 1 +#define SH_MAX_TOKEN_LENGTH 256 // WebGL spec. +} + +%union { + struct { + union { + TString *string; + float f; + int i; + bool b; + }; + TSymbol* symbol; + } lex; + struct { + TOperator op; + union { + TIntermNode* intermNode; + TIntermNodePair nodePair; + TIntermTyped* intermTypedNode; + TIntermAggregate* intermAggregate; + }; + union { + TPublicType type; + TPrecision precision; + TQualifier qualifier; + TFunction* function; + TParameter param; + TField* field; + TFieldList* fieldList; + }; + } interm; +} + +%{ +extern int yylex(YYSTYPE* yylval, YYLTYPE* yylloc, void* yyscanner); +extern void yyerror(YYLTYPE* yylloc, TParseContext* context, const char* reason); + +#define YYLLOC_DEFAULT(Current, Rhs, N) \ + do { \ + if (YYID(N)) { \ + (Current).first_file = YYRHSLOC(Rhs, 1).first_file; \ + (Current).first_line = YYRHSLOC(Rhs, 1).first_line; \ + (Current).last_file = YYRHSLOC(Rhs, N).last_file; \ + (Current).last_line = YYRHSLOC(Rhs, N).last_line; \ + } \ + else { \ + (Current).first_file = YYRHSLOC(Rhs, 0).last_file; \ + (Current).first_line = YYRHSLOC(Rhs, 0).last_line; \ + (Current).last_file = YYRHSLOC(Rhs, 0).last_file; \ + (Current).last_line = YYRHSLOC(Rhs, 0).last_line; \ + } \ + } while (0) + +#define VERTEX_ONLY(S, L) { \ + if (context->shaderType != SH_VERTEX_SHADER) { \ + context->error(L, " supported in vertex shaders only ", S); \ + context->recover(); \ + } \ +} + +#define FRAG_ONLY(S, L) { \ + if (context->shaderType != SH_FRAGMENT_SHADER) { \ + context->error(L, " supported in fragment shaders only ", S); \ + context->recover(); \ + } \ +} +%} + +%token <lex> INVARIANT HIGH_PRECISION MEDIUM_PRECISION LOW_PRECISION PRECISION +%token <lex> ATTRIBUTE CONST_QUAL BOOL_TYPE FLOAT_TYPE INT_TYPE +%token <lex> BREAK CONTINUE DO ELSE FOR IF DISCARD RETURN +%token <lex> BVEC2 BVEC3 BVEC4 IVEC2 IVEC3 IVEC4 VEC2 VEC3 VEC4 +%token <lex> MATRIX2 MATRIX3 MATRIX4 IN_QUAL OUT_QUAL INOUT_QUAL UNIFORM VARYING +%token <lex> STRUCT VOID_TYPE WHILE +%token <lex> SAMPLER2D SAMPLERCUBE SAMPLER_EXTERNAL_OES SAMPLER2DRECT + +%token <lex> IDENTIFIER TYPE_NAME FLOATCONSTANT INTCONSTANT BOOLCONSTANT +%token <lex> LEFT_OP RIGHT_OP +%token <lex> INC_OP DEC_OP LE_OP GE_OP EQ_OP NE_OP +%token <lex> AND_OP OR_OP XOR_OP MUL_ASSIGN DIV_ASSIGN ADD_ASSIGN +%token <lex> MOD_ASSIGN LEFT_ASSIGN RIGHT_ASSIGN AND_ASSIGN XOR_ASSIGN OR_ASSIGN +%token <lex> SUB_ASSIGN + +%token <lex> LEFT_PAREN RIGHT_PAREN LEFT_BRACKET RIGHT_BRACKET LEFT_BRACE RIGHT_BRACE DOT +%token <lex> COMMA COLON EQUAL SEMICOLON BANG DASH TILDE PLUS STAR SLASH PERCENT +%token <lex> LEFT_ANGLE RIGHT_ANGLE VERTICAL_BAR CARET AMPERSAND QUESTION + +%type <lex> identifier +%type <interm> assignment_operator unary_operator +%type <interm.intermTypedNode> variable_identifier primary_expression postfix_expression +%type <interm.intermTypedNode> expression integer_expression assignment_expression +%type <interm.intermTypedNode> unary_expression multiplicative_expression additive_expression +%type <interm.intermTypedNode> relational_expression equality_expression +%type <interm.intermTypedNode> conditional_expression constant_expression +%type <interm.intermTypedNode> logical_or_expression logical_xor_expression logical_and_expression +%type <interm.intermTypedNode> shift_expression and_expression exclusive_or_expression inclusive_or_expression +%type <interm.intermTypedNode> function_call initializer condition conditionopt + +%type <interm.intermNode> translation_unit function_definition +%type <interm.intermNode> statement simple_statement +%type <interm.intermAggregate> statement_list compound_statement +%type <interm.intermNode> declaration_statement selection_statement expression_statement +%type <interm.intermNode> declaration external_declaration +%type <interm.intermNode> for_init_statement compound_statement_no_new_scope +%type <interm.nodePair> selection_rest_statement for_rest_statement +%type <interm.intermNode> iteration_statement jump_statement statement_no_new_scope statement_with_scope +%type <interm> single_declaration init_declarator_list + +%type <interm> parameter_declaration parameter_declarator parameter_type_specifier +%type <interm.qualifier> parameter_qualifier + +%type <interm.precision> precision_qualifier +%type <interm.type> type_qualifier fully_specified_type type_specifier +%type <interm.type> type_specifier_no_prec type_specifier_nonarray +%type <interm.type> struct_specifier +%type <interm.field> struct_declarator +%type <interm.fieldList> struct_declarator_list struct_declaration struct_declaration_list +%type <interm.function> function_header function_declarator function_identifier +%type <interm.function> function_header_with_parameters function_call_header +%type <interm> function_call_header_with_parameters function_call_header_no_parameters function_call_generic function_prototype +%type <interm> function_call_or_method + +%start translation_unit +%% + +identifier + : IDENTIFIER + | TYPE_NAME + +variable_identifier + : IDENTIFIER { + // The symbol table search was done in the lexical phase + const TSymbol *symbol = $1.symbol; + const TVariable *variable = 0; + + if (!symbol) + { + context->error(@1, "undeclared identifier", $1.string->c_str()); + context->recover(); + } + else if (!symbol->isVariable()) + { + context->error(@1, "variable expected", $1.string->c_str()); + context->recover(); + } + else + { + variable = static_cast<const TVariable*>(symbol); + + if (context->symbolTable.findBuiltIn(variable->getName()) && + !variable->getExtension().empty() && + context->extensionErrorCheck(@1, variable->getExtension())) + { + context->recover(); + } + } + + if (!variable) + { + TType type(EbtFloat, EbpUndefined); + TVariable *fakeVariable = new TVariable($1.string, type); + context->symbolTable.insert(*fakeVariable); + variable = fakeVariable; + } + + if (variable->getType().getQualifier() == EvqConst) + { + ConstantUnion* constArray = variable->getConstPointer(); + TType t(variable->getType()); + $$ = context->intermediate.addConstantUnion(constArray, t, @1); + } + else + { + $$ = context->intermediate.addSymbol(variable->getUniqueId(), + variable->getName(), + variable->getType(), + @1); + } + + // don't delete $1.string, it's used by error recovery, and the pool + // pop will reclaim the memory + } + ; + +primary_expression + : variable_identifier { + $$ = $1; + } + | INTCONSTANT { + ConstantUnion *unionArray = new ConstantUnion[1]; + unionArray->setIConst($1.i); + $$ = context->intermediate.addConstantUnion(unionArray, TType(EbtInt, EbpUndefined, EvqConst), @1); + } + | FLOATCONSTANT { + ConstantUnion *unionArray = new ConstantUnion[1]; + unionArray->setFConst($1.f); + $$ = context->intermediate.addConstantUnion(unionArray, TType(EbtFloat, EbpUndefined, EvqConst), @1); + } + | BOOLCONSTANT { + ConstantUnion *unionArray = new ConstantUnion[1]; + unionArray->setBConst($1.b); + $$ = context->intermediate.addConstantUnion(unionArray, TType(EbtBool, EbpUndefined, EvqConst), @1); + } + | LEFT_PAREN expression RIGHT_PAREN { + $$ = $2; + } + ; + +postfix_expression + : primary_expression { + $$ = $1; + } + | postfix_expression LEFT_BRACKET integer_expression RIGHT_BRACKET { + $$ = context->addIndexExpression($1, @2, $3); + } + | function_call { + $$ = $1; + } + | postfix_expression DOT identifier { + if ($1->isArray()) { + context->error(@3, "cannot apply dot operator to an array", "."); + context->recover(); + } + + if ($1->isVector()) { + TVectorFields fields; + if (! context->parseVectorFields(*$3.string, $1->getNominalSize(), fields, @3)) { + fields.num = 1; + fields.offsets[0] = 0; + context->recover(); + } + + if ($1->getType().getQualifier() == EvqConst) { // constant folding for vector fields + $$ = context->addConstVectorNode(fields, $1, @3); + if ($$ == 0) { + context->recover(); + $$ = $1; + } + else + $$->setType(TType($1->getBasicType(), $1->getPrecision(), EvqConst, (int) (*$3.string).size())); + } else { + TString vectorString = *$3.string; + TIntermTyped* index = context->intermediate.addSwizzle(fields, @3); + $$ = context->intermediate.addIndex(EOpVectorSwizzle, $1, index, @2); + $$->setType(TType($1->getBasicType(), $1->getPrecision(), EvqTemporary, (int) vectorString.size())); + } + } else if ($1->isMatrix()) { + TMatrixFields fields; + if (! context->parseMatrixFields(*$3.string, $1->getNominalSize(), fields, @3)) { + fields.wholeRow = false; + fields.wholeCol = false; + fields.row = 0; + fields.col = 0; + context->recover(); + } + + if (fields.wholeRow || fields.wholeCol) { + context->error(@2, " non-scalar fields not implemented yet", "."); + context->recover(); + ConstantUnion *unionArray = new ConstantUnion[1]; + unionArray->setIConst(0); + TIntermTyped* index = context->intermediate.addConstantUnion(unionArray, TType(EbtInt, EbpUndefined, EvqConst), @3); + $$ = context->intermediate.addIndex(EOpIndexDirect, $1, index, @2); + $$->setType(TType($1->getBasicType(), $1->getPrecision(),EvqTemporary, $1->getNominalSize())); + } else { + ConstantUnion *unionArray = new ConstantUnion[1]; + unionArray->setIConst(fields.col * $1->getNominalSize() + fields.row); + TIntermTyped* index = context->intermediate.addConstantUnion(unionArray, TType(EbtInt, EbpUndefined, EvqConst), @3); + $$ = context->intermediate.addIndex(EOpIndexDirect, $1, index, @2); + $$->setType(TType($1->getBasicType(), $1->getPrecision())); + } + } else if ($1->getBasicType() == EbtStruct) { + bool fieldFound = false; + const TFieldList& fields = $1->getType().getStruct()->fields(); + unsigned int i; + for (i = 0; i < fields.size(); ++i) { + if (fields[i]->name() == *$3.string) { + fieldFound = true; + break; + } + } + if (fieldFound) { + if ($1->getType().getQualifier() == EvqConst) { + $$ = context->addConstStruct(*$3.string, $1, @2); + if ($$ == 0) { + context->recover(); + $$ = $1; + } + else { + $$->setType(*fields[i]->type()); + // change the qualifier of the return type, not of the structure field + // as the structure definition is shared between various structures. + $$->getTypePointer()->setQualifier(EvqConst); + } + } else { + ConstantUnion *unionArray = new ConstantUnion[1]; + unionArray->setIConst(i); + TIntermTyped* index = context->intermediate.addConstantUnion(unionArray, *fields[i]->type(), @3); + $$ = context->intermediate.addIndex(EOpIndexDirectStruct, $1, index, @2); + $$->setType(*fields[i]->type()); + } + } else { + context->error(@2, " no such field in structure", $3.string->c_str()); + context->recover(); + $$ = $1; + } + } else { + context->error(@2, " field selection requires structure, vector, or matrix on left hand side", $3.string->c_str()); + context->recover(); + $$ = $1; + } + // don't delete $3.string, it's from the pool + } + | postfix_expression INC_OP { + if (context->lValueErrorCheck(@2, "++", $1)) + context->recover(); + $$ = context->intermediate.addUnaryMath(EOpPostIncrement, $1, @2, context->symbolTable); + if ($$ == 0) { + context->unaryOpError(@2, "++", $1->getCompleteString()); + context->recover(); + $$ = $1; + } + } + | postfix_expression DEC_OP { + if (context->lValueErrorCheck(@2, "--", $1)) + context->recover(); + $$ = context->intermediate.addUnaryMath(EOpPostDecrement, $1, @2, context->symbolTable); + if ($$ == 0) { + context->unaryOpError(@2, "--", $1->getCompleteString()); + context->recover(); + $$ = $1; + } + } + ; + +integer_expression + : expression { + if (context->integerErrorCheck($1, "[]")) + context->recover(); + $$ = $1; + } + ; + +function_call + : function_call_or_method { + TFunction* fnCall = $1.function; + TOperator op = fnCall->getBuiltInOp(); + + if (op != EOpNull) + { + // + // Then this should be a constructor. + // Don't go through the symbol table for constructors. + // Their parameters will be verified algorithmically. + // + TType type(EbtVoid, EbpUndefined); // use this to get the type back + if (context->constructorErrorCheck(@1, $1.intermNode, *fnCall, op, &type)) { + $$ = 0; + } else { + // + // It's a constructor, of type 'type'. + // + $$ = context->addConstructor($1.intermNode, &type, op, fnCall, @1); + } + + if ($$ == 0) { + context->recover(); + $$ = context->intermediate.setAggregateOperator(0, op, @1); + } + $$->setType(type); + } else { + // + // Not a constructor. Find it in the symbol table. + // + const TFunction* fnCandidate; + bool builtIn; + fnCandidate = context->findFunction(@1, fnCall, &builtIn); + if (fnCandidate) { + // + // A declared function. + // + if (builtIn && !fnCandidate->getExtension().empty() && + context->extensionErrorCheck(@1, fnCandidate->getExtension())) { + context->recover(); + } + op = fnCandidate->getBuiltInOp(); + if (builtIn && op != EOpNull) { + // + // A function call mapped to a built-in operation. + // + if (fnCandidate->getParamCount() == 1) { + // + // Treat it like a built-in unary operator. + // + $$ = context->intermediate.addUnaryMath(op, $1.intermNode, @1, context->symbolTable); + if ($$ == 0) { + std::stringstream extraInfoStream; + extraInfoStream << "built in unary operator function. Type: " << static_cast<TIntermTyped*>($1.intermNode)->getCompleteString(); + std::string extraInfo = extraInfoStream.str(); + context->error($1.intermNode->getLine(), " wrong operand type", "Internal Error", extraInfo.c_str()); + YYERROR; + } + } else { + $$ = context->intermediate.setAggregateOperator($1.intermAggregate, op, @1); + } + } else { + // This is a real function call + + $$ = context->intermediate.setAggregateOperator($1.intermAggregate, EOpFunctionCall, @1); + $$->setType(fnCandidate->getReturnType()); + + // this is how we know whether the given function is a builtIn function or a user defined function + // if builtIn == false, it's a userDefined -> could be an overloaded builtIn function also + // if builtIn == true, it's definitely a builtIn function with EOpNull + if (!builtIn) + $$->getAsAggregate()->setUserDefined(); + $$->getAsAggregate()->setName(fnCandidate->getMangledName()); + + TQualifier qual; + for (size_t i = 0; i < fnCandidate->getParamCount(); ++i) { + qual = fnCandidate->getParam(i).type->getQualifier(); + if (qual == EvqOut || qual == EvqInOut) { + if (context->lValueErrorCheck($$->getLine(), "assign", $$->getAsAggregate()->getSequence()[i]->getAsTyped())) { + context->error($1.intermNode->getLine(), "Constant value cannot be passed for 'out' or 'inout' parameters.", "Error"); + context->recover(); + } + } + } + } + $$->setType(fnCandidate->getReturnType()); + } else { + // error message was put out by PaFindFunction() + // Put on a dummy node for error recovery + ConstantUnion *unionArray = new ConstantUnion[1]; + unionArray->setFConst(0.0f); + $$ = context->intermediate.addConstantUnion(unionArray, TType(EbtFloat, EbpUndefined, EvqConst), @1); + context->recover(); + } + } + delete fnCall; + } + ; + +function_call_or_method + : function_call_generic { + $$ = $1; + } + | postfix_expression DOT function_call_generic { + context->error(@3, "methods are not supported", ""); + context->recover(); + $$ = $3; + } + ; + +function_call_generic + : function_call_header_with_parameters RIGHT_PAREN { + $$ = $1; + } + | function_call_header_no_parameters RIGHT_PAREN { + $$ = $1; + } + ; + +function_call_header_no_parameters + : function_call_header VOID_TYPE { + $$.function = $1; + $$.intermNode = 0; + } + | function_call_header { + $$.function = $1; + $$.intermNode = 0; + } + ; + +function_call_header_with_parameters + : function_call_header assignment_expression { + TParameter param = { 0, new TType($2->getType()) }; + $1->addParameter(param); + $$.function = $1; + $$.intermNode = $2; + } + | function_call_header_with_parameters COMMA assignment_expression { + TParameter param = { 0, new TType($3->getType()) }; + $1.function->addParameter(param); + $$.function = $1.function; + $$.intermNode = context->intermediate.growAggregate($1.intermNode, $3, @2); + } + ; + +function_call_header + : function_identifier LEFT_PAREN { + $$ = $1; + } + ; + +// Grammar Note: Constructors look like functions, but are recognized as types. + +function_identifier + : type_specifier_nonarray { + // + // Constructor + // + TOperator op = EOpNull; + if ($1.userDef) { + op = EOpConstructStruct; + } else { + switch ($1.type) { + case EbtFloat: + if ($1.matrix) { + switch($1.size) { + case 2: op = EOpConstructMat2; break; + case 3: op = EOpConstructMat3; break; + case 4: op = EOpConstructMat4; break; + } + } else { + switch($1.size) { + case 1: op = EOpConstructFloat; break; + case 2: op = EOpConstructVec2; break; + case 3: op = EOpConstructVec3; break; + case 4: op = EOpConstructVec4; break; + } + } + break; + case EbtInt: + switch($1.size) { + case 1: op = EOpConstructInt; break; + case 2: op = EOpConstructIVec2; break; + case 3: op = EOpConstructIVec3; break; + case 4: op = EOpConstructIVec4; break; + } + break; + case EbtBool: + switch($1.size) { + case 1: op = EOpConstructBool; break; + case 2: op = EOpConstructBVec2; break; + case 3: op = EOpConstructBVec3; break; + case 4: op = EOpConstructBVec4; break; + } + break; + default: break; + } + if (op == EOpNull) { + context->error(@1, "cannot construct this type", getBasicString($1.type)); + context->recover(); + $1.type = EbtFloat; + op = EOpConstructFloat; + } + } + TString tempString; + TType type($1); + TFunction *function = new TFunction(&tempString, type, op); + $$ = function; + } + | IDENTIFIER { + if (context->reservedErrorCheck(@1, *$1.string)) + context->recover(); + TType type(EbtVoid, EbpUndefined); + TFunction *function = new TFunction($1.string, type); + $$ = function; + } + ; + +unary_expression + : postfix_expression { + $$ = $1; + } + | INC_OP unary_expression { + if (context->lValueErrorCheck(@1, "++", $2)) + context->recover(); + $$ = context->intermediate.addUnaryMath(EOpPreIncrement, $2, @1, context->symbolTable); + if ($$ == 0) { + context->unaryOpError(@1, "++", $2->getCompleteString()); + context->recover(); + $$ = $2; + } + } + | DEC_OP unary_expression { + if (context->lValueErrorCheck(@1, "--", $2)) + context->recover(); + $$ = context->intermediate.addUnaryMath(EOpPreDecrement, $2, @1, context->symbolTable); + if ($$ == 0) { + context->unaryOpError(@1, "--", $2->getCompleteString()); + context->recover(); + $$ = $2; + } + } + | unary_operator unary_expression { + if ($1.op != EOpNull) { + $$ = context->intermediate.addUnaryMath($1.op, $2, @1, context->symbolTable); + if ($$ == 0) { + const char* errorOp = ""; + switch($1.op) { + case EOpNegative: errorOp = "-"; break; + case EOpLogicalNot: errorOp = "!"; break; + default: break; + } + context->unaryOpError(@1, errorOp, $2->getCompleteString()); + context->recover(); + $$ = $2; + } + } else + $$ = $2; + } + ; +// Grammar Note: No traditional style type casts. + +unary_operator + : PLUS { $$.op = EOpNull; } + | DASH { $$.op = EOpNegative; } + | BANG { $$.op = EOpLogicalNot; } + ; +// Grammar Note: No '*' or '&' unary ops. Pointers are not supported. + +multiplicative_expression + : unary_expression { $$ = $1; } + | multiplicative_expression STAR unary_expression { + $$ = context->intermediate.addBinaryMath(EOpMul, $1, $3, @2, context->symbolTable); + if ($$ == 0) { + context->binaryOpError(@2, "*", $1->getCompleteString(), $3->getCompleteString()); + context->recover(); + $$ = $1; + } + } + | multiplicative_expression SLASH unary_expression { + $$ = context->intermediate.addBinaryMath(EOpDiv, $1, $3, @2, context->symbolTable); + if ($$ == 0) { + context->binaryOpError(@2, "/", $1->getCompleteString(), $3->getCompleteString()); + context->recover(); + $$ = $1; + } + } + ; + +additive_expression + : multiplicative_expression { $$ = $1; } + | additive_expression PLUS multiplicative_expression { + $$ = context->intermediate.addBinaryMath(EOpAdd, $1, $3, @2, context->symbolTable); + if ($$ == 0) { + context->binaryOpError(@2, "+", $1->getCompleteString(), $3->getCompleteString()); + context->recover(); + $$ = $1; + } + } + | additive_expression DASH multiplicative_expression { + $$ = context->intermediate.addBinaryMath(EOpSub, $1, $3, @2, context->symbolTable); + if ($$ == 0) { + context->binaryOpError(@2, "-", $1->getCompleteString(), $3->getCompleteString()); + context->recover(); + $$ = $1; + } + } + ; + +shift_expression + : additive_expression { $$ = $1; } + ; + +relational_expression + : shift_expression { $$ = $1; } + | relational_expression LEFT_ANGLE shift_expression { + $$ = context->intermediate.addBinaryMath(EOpLessThan, $1, $3, @2, context->symbolTable); + if ($$ == 0) { + context->binaryOpError(@2, "<", $1->getCompleteString(), $3->getCompleteString()); + context->recover(); + ConstantUnion *unionArray = new ConstantUnion[1]; + unionArray->setBConst(false); + $$ = context->intermediate.addConstantUnion(unionArray, TType(EbtBool, EbpUndefined, EvqConst), @2); + } + } + | relational_expression RIGHT_ANGLE shift_expression { + $$ = context->intermediate.addBinaryMath(EOpGreaterThan, $1, $3, @2, context->symbolTable); + if ($$ == 0) { + context->binaryOpError(@2, ">", $1->getCompleteString(), $3->getCompleteString()); + context->recover(); + ConstantUnion *unionArray = new ConstantUnion[1]; + unionArray->setBConst(false); + $$ = context->intermediate.addConstantUnion(unionArray, TType(EbtBool, EbpUndefined, EvqConst), @2); + } + } + | relational_expression LE_OP shift_expression { + $$ = context->intermediate.addBinaryMath(EOpLessThanEqual, $1, $3, @2, context->symbolTable); + if ($$ == 0) { + context->binaryOpError(@2, "<=", $1->getCompleteString(), $3->getCompleteString()); + context->recover(); + ConstantUnion *unionArray = new ConstantUnion[1]; + unionArray->setBConst(false); + $$ = context->intermediate.addConstantUnion(unionArray, TType(EbtBool, EbpUndefined, EvqConst), @2); + } + } + | relational_expression GE_OP shift_expression { + $$ = context->intermediate.addBinaryMath(EOpGreaterThanEqual, $1, $3, @2, context->symbolTable); + if ($$ == 0) { + context->binaryOpError(@2, ">=", $1->getCompleteString(), $3->getCompleteString()); + context->recover(); + ConstantUnion *unionArray = new ConstantUnion[1]; + unionArray->setBConst(false); + $$ = context->intermediate.addConstantUnion(unionArray, TType(EbtBool, EbpUndefined, EvqConst), @2); + } + } + ; + +equality_expression + : relational_expression { $$ = $1; } + | equality_expression EQ_OP relational_expression { + $$ = context->intermediate.addBinaryMath(EOpEqual, $1, $3, @2, context->symbolTable); + if ($$ == 0) { + context->binaryOpError(@2, "==", $1->getCompleteString(), $3->getCompleteString()); + context->recover(); + ConstantUnion *unionArray = new ConstantUnion[1]; + unionArray->setBConst(false); + $$ = context->intermediate.addConstantUnion(unionArray, TType(EbtBool, EbpUndefined, EvqConst), @2); + } + } + | equality_expression NE_OP relational_expression { + $$ = context->intermediate.addBinaryMath(EOpNotEqual, $1, $3, @2, context->symbolTable); + if ($$ == 0) { + context->binaryOpError(@2, "!=", $1->getCompleteString(), $3->getCompleteString()); + context->recover(); + ConstantUnion *unionArray = new ConstantUnion[1]; + unionArray->setBConst(false); + $$ = context->intermediate.addConstantUnion(unionArray, TType(EbtBool, EbpUndefined, EvqConst), @2); + } + } + ; + +and_expression + : equality_expression { $$ = $1; } + ; + +exclusive_or_expression + : and_expression { $$ = $1; } + ; + +inclusive_or_expression + : exclusive_or_expression { $$ = $1; } + ; + +logical_and_expression + : inclusive_or_expression { $$ = $1; } + | logical_and_expression AND_OP inclusive_or_expression { + $$ = context->intermediate.addBinaryMath(EOpLogicalAnd, $1, $3, @2, context->symbolTable); + if ($$ == 0) { + context->binaryOpError(@2, "&&", $1->getCompleteString(), $3->getCompleteString()); + context->recover(); + ConstantUnion *unionArray = new ConstantUnion[1]; + unionArray->setBConst(false); + $$ = context->intermediate.addConstantUnion(unionArray, TType(EbtBool, EbpUndefined, EvqConst), @2); + } + } + ; + +logical_xor_expression + : logical_and_expression { $$ = $1; } + | logical_xor_expression XOR_OP logical_and_expression { + $$ = context->intermediate.addBinaryMath(EOpLogicalXor, $1, $3, @2, context->symbolTable); + if ($$ == 0) { + context->binaryOpError(@2, "^^", $1->getCompleteString(), $3->getCompleteString()); + context->recover(); + ConstantUnion *unionArray = new ConstantUnion[1]; + unionArray->setBConst(false); + $$ = context->intermediate.addConstantUnion(unionArray, TType(EbtBool, EbpUndefined, EvqConst), @2); + } + } + ; + +logical_or_expression + : logical_xor_expression { $$ = $1; } + | logical_or_expression OR_OP logical_xor_expression { + $$ = context->intermediate.addBinaryMath(EOpLogicalOr, $1, $3, @2, context->symbolTable); + if ($$ == 0) { + context->binaryOpError(@2, "||", $1->getCompleteString(), $3->getCompleteString()); + context->recover(); + ConstantUnion *unionArray = new ConstantUnion[1]; + unionArray->setBConst(false); + $$ = context->intermediate.addConstantUnion(unionArray, TType(EbtBool, EbpUndefined, EvqConst), @2); + } + } + ; + +conditional_expression + : logical_or_expression { $$ = $1; } + | logical_or_expression QUESTION expression COLON assignment_expression { + if (context->boolErrorCheck(@2, $1)) + context->recover(); + + $$ = context->intermediate.addSelection($1, $3, $5, @2); + if ($3->getType() != $5->getType()) + $$ = 0; + + if ($$ == 0) { + context->binaryOpError(@2, ":", $3->getCompleteString(), $5->getCompleteString()); + context->recover(); + $$ = $5; + } + } + ; + +assignment_expression + : conditional_expression { $$ = $1; } + | unary_expression assignment_operator assignment_expression { + if (context->lValueErrorCheck(@2, "assign", $1)) + context->recover(); + $$ = context->intermediate.addAssign($2.op, $1, $3, @2); + if ($$ == 0) { + context->assignError(@2, "assign", $1->getCompleteString(), $3->getCompleteString()); + context->recover(); + $$ = $1; + } + } + ; + +assignment_operator + : EQUAL { $$.op = EOpAssign; } + | MUL_ASSIGN { $$.op = EOpMulAssign; } + | DIV_ASSIGN { $$.op = EOpDivAssign; } + | ADD_ASSIGN { $$.op = EOpAddAssign; } + | SUB_ASSIGN { $$.op = EOpSubAssign; } + ; + +expression + : assignment_expression { + $$ = $1; + } + | expression COMMA assignment_expression { + $$ = context->intermediate.addComma($1, $3, @2); + if ($$ == 0) { + context->binaryOpError(@2, ",", $1->getCompleteString(), $3->getCompleteString()); + context->recover(); + $$ = $3; + } + } + ; + +constant_expression + : conditional_expression { + if (context->constErrorCheck($1)) + context->recover(); + $$ = $1; + } + ; + +declaration + : function_prototype SEMICOLON { + TFunction &function = *($1.function); + + TIntermAggregate *prototype = new TIntermAggregate; + prototype->setType(function.getReturnType()); + prototype->setName(function.getName()); + + for (size_t i = 0; i < function.getParamCount(); i++) + { + const TParameter ¶m = function.getParam(i); + if (param.name != 0) + { + TVariable variable(param.name, *param.type); + + prototype = context->intermediate.growAggregate(prototype, context->intermediate.addSymbol(variable.getUniqueId(), variable.getName(), variable.getType(), @1), @1); + } + else + { + prototype = context->intermediate.growAggregate(prototype, context->intermediate.addSymbol(0, "", *param.type, @1), @1); + } + } + + prototype->setOp(EOpPrototype); + $$ = prototype; + + context->symbolTable.pop(); + } + | init_declarator_list SEMICOLON { + if ($1.intermAggregate) + $1.intermAggregate->setOp(EOpDeclaration); + $$ = $1.intermAggregate; + } + | PRECISION precision_qualifier type_specifier_no_prec SEMICOLON { + if (($2 == EbpHigh) && (context->shaderType == SH_FRAGMENT_SHADER) && !context->fragmentPrecisionHigh) { + context->error(@1, "precision is not supported in fragment shader", "highp"); + context->recover(); + } + if (!context->symbolTable.setDefaultPrecision( $3, $2 )) { + context->error(@1, "illegal type argument for default precision qualifier", getBasicString($3.type)); + context->recover(); + } + $$ = 0; + } + ; + +function_prototype + : function_declarator RIGHT_PAREN { + // + // Multiple declarations of the same function are allowed. + // + // If this is a definition, the definition production code will check for redefinitions + // (we don't know at this point if it's a definition or not). + // + // Redeclarations are allowed. But, return types and parameter qualifiers must match. + // + TFunction* prevDec = static_cast<TFunction*>(context->symbolTable.find($1->getMangledName())); + if (prevDec) { + if (prevDec->getReturnType() != $1->getReturnType()) { + context->error(@2, "overloaded functions must have the same return type", $1->getReturnType().getBasicString()); + context->recover(); + } + for (size_t i = 0; i < prevDec->getParamCount(); ++i) { + if (prevDec->getParam(i).type->getQualifier() != $1->getParam(i).type->getQualifier()) { + context->error(@2, "overloaded functions must have the same parameter qualifiers", $1->getParam(i).type->getQualifierString()); + context->recover(); + } + } + } + + // + // Check for previously declared variables using the same name. + // + TSymbol *prevSym = context->symbolTable.find($1->getName()); + if (prevSym) + { + if (!prevSym->isFunction()) + { + context->error(@2, "redefinition", $1->getName().c_str(), "function"); + context->recover(); + } + } + else + { + // Insert the unmangled name to detect potential future redefinition as a variable. + context->symbolTable.getOuterLevel()->insert($1->getName(), *$1); + } + + // + // If this is a redeclaration, it could also be a definition, + // in which case, we want to use the variable names from this one, and not the one that's + // being redeclared. So, pass back up this declaration, not the one in the symbol table. + // + $$.function = $1; + + // We're at the inner scope level of the function's arguments and body statement. + // Add the function prototype to the surrounding scope instead. + context->symbolTable.getOuterLevel()->insert(*$$.function); + } + ; + +function_declarator + : function_header { + $$ = $1; + } + | function_header_with_parameters { + $$ = $1; + } + ; + + +function_header_with_parameters + : function_header parameter_declaration { + // Add the parameter + $$ = $1; + if ($2.param.type->getBasicType() != EbtVoid) + $1->addParameter($2.param); + else + delete $2.param.type; + } + | function_header_with_parameters COMMA parameter_declaration { + // + // Only first parameter of one-parameter functions can be void + // The check for named parameters not being void is done in parameter_declarator + // + if ($3.param.type->getBasicType() == EbtVoid) { + // + // This parameter > first is void + // + context->error(@2, "cannot be an argument type except for '(void)'", "void"); + context->recover(); + delete $3.param.type; + } else { + // Add the parameter + $$ = $1; + $1->addParameter($3.param); + } + } + ; + +function_header + : fully_specified_type IDENTIFIER LEFT_PAREN { + if ($1.qualifier != EvqGlobal && $1.qualifier != EvqTemporary) { + context->error(@2, "no qualifiers allowed for function return", getQualifierString($1.qualifier)); + context->recover(); + } + // make sure a sampler is not involved as well... + if (context->structQualifierErrorCheck(@2, $1)) + context->recover(); + + // Add the function as a prototype after parsing it (we do not support recursion) + TFunction *function; + TType type($1); + function = new TFunction($2.string, type); + $$ = function; + + context->symbolTable.push(); + } + ; + +parameter_declarator + // Type + name + : type_specifier identifier { + if ($1.type == EbtVoid) { + context->error(@2, "illegal use of type 'void'", $2.string->c_str()); + context->recover(); + } + if (context->reservedErrorCheck(@2, *$2.string)) + context->recover(); + TParameter param = {$2.string, new TType($1)}; + $$.param = param; + } + | type_specifier identifier LEFT_BRACKET constant_expression RIGHT_BRACKET { + // Check that we can make an array out of this type + if (context->arrayTypeErrorCheck(@3, $1)) + context->recover(); + + if (context->reservedErrorCheck(@2, *$2.string)) + context->recover(); + + int size; + if (context->arraySizeErrorCheck(@3, $4, size)) + context->recover(); + $1.setArray(true, size); + + TType* type = new TType($1); + TParameter param = { $2.string, type }; + $$.param = param; + } + ; + +parameter_declaration + // + // The only parameter qualifier a parameter can have are + // IN_QUAL, OUT_QUAL, INOUT_QUAL, or CONST. + // + + // + // Type + name + // + : type_qualifier parameter_qualifier parameter_declarator { + $$ = $3; + if (context->paramErrorCheck(@3, $1.qualifier, $2, $$.param.type)) + context->recover(); + } + | parameter_qualifier parameter_declarator { + $$ = $2; + if (context->parameterSamplerErrorCheck(@2, $1, *$2.param.type)) + context->recover(); + if (context->paramErrorCheck(@2, EvqTemporary, $1, $$.param.type)) + context->recover(); + } + // + // Only type + // + | type_qualifier parameter_qualifier parameter_type_specifier { + $$ = $3; + if (context->paramErrorCheck(@3, $1.qualifier, $2, $$.param.type)) + context->recover(); + } + | parameter_qualifier parameter_type_specifier { + $$ = $2; + if (context->parameterSamplerErrorCheck(@2, $1, *$2.param.type)) + context->recover(); + if (context->paramErrorCheck(@2, EvqTemporary, $1, $$.param.type)) + context->recover(); + } + ; + +parameter_qualifier + : /* empty */ { + $$ = EvqIn; + } + | IN_QUAL { + $$ = EvqIn; + } + | OUT_QUAL { + $$ = EvqOut; + } + | INOUT_QUAL { + $$ = EvqInOut; + } + ; + +parameter_type_specifier + : type_specifier { + TParameter param = { 0, new TType($1) }; + $$.param = param; + } + ; + +init_declarator_list + : single_declaration { + $$ = $1; + } + | init_declarator_list COMMA identifier { + if ($1.type.type == EbtInvariant && !$3.symbol) + { + context->error(@3, "undeclared identifier declared as invariant", $3.string->c_str()); + context->recover(); + } + + TIntermSymbol* symbol = context->intermediate.addSymbol(0, *$3.string, TType($1.type), @3); + $$.intermAggregate = context->intermediate.growAggregate($1.intermNode, symbol, @3); + + if (context->structQualifierErrorCheck(@3, $$.type)) + context->recover(); + + if (context->nonInitConstErrorCheck(@3, *$3.string, $$.type, false)) + context->recover(); + + TVariable* variable = 0; + if (context->nonInitErrorCheck(@3, *$3.string, $$.type, variable)) + context->recover(); + if (symbol && variable) + symbol->setId(variable->getUniqueId()); + } + | init_declarator_list COMMA identifier LEFT_BRACKET RIGHT_BRACKET { + if (context->structQualifierErrorCheck(@3, $1.type)) + context->recover(); + + if (context->nonInitConstErrorCheck(@3, *$3.string, $1.type, true)) + context->recover(); + + $$ = $1; + + if (context->arrayTypeErrorCheck(@4, $1.type) || context->arrayQualifierErrorCheck(@4, $1.type)) + context->recover(); + else { + $1.type.setArray(true); + TVariable* variable; + if (context->arrayErrorCheck(@4, *$3.string, $1.type, variable)) + context->recover(); + } + } + | init_declarator_list COMMA identifier LEFT_BRACKET constant_expression RIGHT_BRACKET { + if (context->structQualifierErrorCheck(@3, $1.type)) + context->recover(); + + if (context->nonInitConstErrorCheck(@3, *$3.string, $1.type, true)) + context->recover(); + + $$ = $1; + + if (context->arrayTypeErrorCheck(@4, $1.type) || context->arrayQualifierErrorCheck(@4, $1.type)) + context->recover(); + else { + int size; + if (context->arraySizeErrorCheck(@4, $5, size)) + context->recover(); + $1.type.setArray(true, size); + TVariable* variable = 0; + if (context->arrayErrorCheck(@4, *$3.string, $1.type, variable)) + context->recover(); + TType type = TType($1.type); + type.setArraySize(size); + $$.intermAggregate = context->intermediate.growAggregate($1.intermNode, context->intermediate.addSymbol(variable ? variable->getUniqueId() : 0, *$3.string, type, @3), @3); + } + } + | init_declarator_list COMMA identifier EQUAL initializer { + if (context->structQualifierErrorCheck(@3, $1.type)) + context->recover(); + + $$ = $1; + + TIntermNode* intermNode; + if (!context->executeInitializer(@3, *$3.string, $1.type, $5, intermNode)) { + // + // build the intermediate representation + // + if (intermNode) + $$.intermAggregate = context->intermediate.growAggregate($1.intermNode, intermNode, @4); + else + $$.intermAggregate = $1.intermAggregate; + } else { + context->recover(); + $$.intermAggregate = 0; + } + } + ; + +single_declaration + : fully_specified_type { + $$.type = $1; + $$.intermAggregate = context->intermediate.makeAggregate(context->intermediate.addSymbol(0, "", TType($1), @1), @1); + } + | fully_specified_type identifier { + TIntermSymbol* symbol = context->intermediate.addSymbol(0, *$2.string, TType($1), @2); + $$.intermAggregate = context->intermediate.makeAggregate(symbol, @2); + + if (context->structQualifierErrorCheck(@2, $$.type)) + context->recover(); + + if (context->nonInitConstErrorCheck(@2, *$2.string, $$.type, false)) + context->recover(); + + $$.type = $1; + + TVariable* variable = 0; + if (context->nonInitErrorCheck(@2, *$2.string, $$.type, variable)) + context->recover(); + if (variable && symbol) + symbol->setId(variable->getUniqueId()); + } + | fully_specified_type identifier LEFT_BRACKET RIGHT_BRACKET { + context->error(@2, "unsized array declarations not supported", $2.string->c_str()); + context->recover(); + + TIntermSymbol* symbol = context->intermediate.addSymbol(0, *$2.string, TType($1), @2); + $$.intermAggregate = context->intermediate.makeAggregate(symbol, @2); + $$.type = $1; + } + | fully_specified_type identifier LEFT_BRACKET constant_expression RIGHT_BRACKET { + TType type = TType($1); + int size; + if (context->arraySizeErrorCheck(@2, $4, size)) + context->recover(); + type.setArraySize(size); + TIntermSymbol* symbol = context->intermediate.addSymbol(0, *$2.string, type, @2); + $$.intermAggregate = context->intermediate.makeAggregate(symbol, @2); + + if (context->structQualifierErrorCheck(@2, $1)) + context->recover(); + + if (context->nonInitConstErrorCheck(@2, *$2.string, $1, true)) + context->recover(); + + $$.type = $1; + + if (context->arrayTypeErrorCheck(@3, $1) || context->arrayQualifierErrorCheck(@3, $1)) + context->recover(); + else { + int size; + if (context->arraySizeErrorCheck(@3, $4, size)) + context->recover(); + + $1.setArray(true, size); + TVariable* variable = 0; + if (context->arrayErrorCheck(@3, *$2.string, $1, variable)) + context->recover(); + if (variable && symbol) + symbol->setId(variable->getUniqueId()); + } + } + | fully_specified_type identifier EQUAL initializer { + if (context->structQualifierErrorCheck(@2, $1)) + context->recover(); + + $$.type = $1; + + TIntermNode* intermNode; + if (!context->executeInitializer(@2, *$2.string, $1, $4, intermNode)) { + // + // Build intermediate representation + // + if(intermNode) + $$.intermAggregate = context->intermediate.makeAggregate(intermNode, @3); + else + $$.intermAggregate = 0; + } else { + context->recover(); + $$.intermAggregate = 0; + } + } + | INVARIANT IDENTIFIER { + VERTEX_ONLY("invariant declaration", @1); + if (context->globalErrorCheck(@1, context->symbolTable.atGlobalLevel(), "invariant varying")) + context->recover(); + $$.type.setBasic(EbtInvariant, EvqInvariantVaryingOut, @2); + if (!$2.symbol) + { + context->error(@2, "undeclared identifier declared as invariant", $2.string->c_str()); + context->recover(); + + $$.intermAggregate = 0; + } + else + { + TIntermSymbol *symbol = context->intermediate.addSymbol(0, *$2.string, TType($$.type), @2); + $$.intermAggregate = context->intermediate.makeAggregate(symbol, @2); + } + } + ; + +fully_specified_type + : type_specifier { + $$ = $1; + + if ($1.array) { + context->error(@1, "not supported", "first-class array"); + context->recover(); + $1.setArray(false); + } + } + | type_qualifier type_specifier { + if ($2.array) { + context->error(@2, "not supported", "first-class array"); + context->recover(); + $2.setArray(false); + } + + if ($1.qualifier == EvqAttribute && + ($2.type == EbtBool || $2.type == EbtInt)) { + context->error(@2, "cannot be bool or int", getQualifierString($1.qualifier)); + context->recover(); + } + if (($1.qualifier == EvqVaryingIn || $1.qualifier == EvqVaryingOut) && + ($2.type == EbtBool || $2.type == EbtInt)) { + context->error(@2, "cannot be bool or int", getQualifierString($1.qualifier)); + context->recover(); + } + $$ = $2; + $$.qualifier = $1.qualifier; + } + ; + +type_qualifier + : CONST_QUAL { + $$.setBasic(EbtVoid, EvqConst, @1); + } + | ATTRIBUTE { + VERTEX_ONLY("attribute", @1); + if (context->globalErrorCheck(@1, context->symbolTable.atGlobalLevel(), "attribute")) + context->recover(); + $$.setBasic(EbtVoid, EvqAttribute, @1); + } + | VARYING { + if (context->globalErrorCheck(@1, context->symbolTable.atGlobalLevel(), "varying")) + context->recover(); + if (context->shaderType == SH_VERTEX_SHADER) + $$.setBasic(EbtVoid, EvqVaryingOut, @1); + else + $$.setBasic(EbtVoid, EvqVaryingIn, @1); + } + | INVARIANT VARYING { + if (context->globalErrorCheck(@1, context->symbolTable.atGlobalLevel(), "invariant varying")) + context->recover(); + if (context->shaderType == SH_VERTEX_SHADER) + $$.setBasic(EbtVoid, EvqInvariantVaryingOut, @1); + else + $$.setBasic(EbtVoid, EvqInvariantVaryingIn, @1); + } + | UNIFORM { + if (context->globalErrorCheck(@1, context->symbolTable.atGlobalLevel(), "uniform")) + context->recover(); + $$.setBasic(EbtVoid, EvqUniform, @1); + } + ; + +type_specifier + : type_specifier_no_prec { + $$ = $1; + + if ($$.precision == EbpUndefined) { + $$.precision = context->symbolTable.getDefaultPrecision($1.type); + if (context->precisionErrorCheck(@1, $$.precision, $1.type)) { + context->recover(); + } + } + } + | precision_qualifier type_specifier_no_prec { + $$ = $2; + $$.precision = $1; + } + ; + +precision_qualifier + : HIGH_PRECISION { + $$ = EbpHigh; + } + | MEDIUM_PRECISION { + $$ = EbpMedium; + } + | LOW_PRECISION { + $$ = EbpLow; + } + ; + +type_specifier_no_prec + : type_specifier_nonarray { + $$ = $1; + } + | type_specifier_nonarray LEFT_BRACKET constant_expression RIGHT_BRACKET { + $$ = $1; + + if (context->arrayTypeErrorCheck(@2, $1)) + context->recover(); + else { + int size; + if (context->arraySizeErrorCheck(@2, $3, size)) + context->recover(); + $$.setArray(true, size); + } + } + ; + +type_specifier_nonarray + : VOID_TYPE { + TQualifier qual = context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary; + $$.setBasic(EbtVoid, qual, @1); + } + | FLOAT_TYPE { + TQualifier qual = context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary; + $$.setBasic(EbtFloat, qual, @1); + } + | INT_TYPE { + TQualifier qual = context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary; + $$.setBasic(EbtInt, qual, @1); + } + | BOOL_TYPE { + TQualifier qual = context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary; + $$.setBasic(EbtBool, qual, @1); + } + | VEC2 { + TQualifier qual = context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary; + $$.setBasic(EbtFloat, qual, @1); + $$.setAggregate(2); + } + | VEC3 { + TQualifier qual = context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary; + $$.setBasic(EbtFloat, qual, @1); + $$.setAggregate(3); + } + | VEC4 { + TQualifier qual = context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary; + $$.setBasic(EbtFloat, qual, @1); + $$.setAggregate(4); + } + | BVEC2 { + TQualifier qual = context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary; + $$.setBasic(EbtBool, qual, @1); + $$.setAggregate(2); + } + | BVEC3 { + TQualifier qual = context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary; + $$.setBasic(EbtBool, qual, @1); + $$.setAggregate(3); + } + | BVEC4 { + TQualifier qual = context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary; + $$.setBasic(EbtBool, qual, @1); + $$.setAggregate(4); + } + | IVEC2 { + TQualifier qual = context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary; + $$.setBasic(EbtInt, qual, @1); + $$.setAggregate(2); + } + | IVEC3 { + TQualifier qual = context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary; + $$.setBasic(EbtInt, qual, @1); + $$.setAggregate(3); + } + | IVEC4 { + TQualifier qual = context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary; + $$.setBasic(EbtInt, qual, @1); + $$.setAggregate(4); + } + | MATRIX2 { + TQualifier qual = context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary; + $$.setBasic(EbtFloat, qual, @1); + $$.setAggregate(2, true); + } + | MATRIX3 { + TQualifier qual = context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary; + $$.setBasic(EbtFloat, qual, @1); + $$.setAggregate(3, true); + } + | MATRIX4 { + TQualifier qual = context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary; + $$.setBasic(EbtFloat, qual, @1); + $$.setAggregate(4, true); + } + | SAMPLER2D { + TQualifier qual = context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary; + $$.setBasic(EbtSampler2D, qual, @1); + } + | SAMPLERCUBE { + TQualifier qual = context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary; + $$.setBasic(EbtSamplerCube, qual, @1); + } + | SAMPLER_EXTERNAL_OES { + if (!context->supportsExtension("GL_OES_EGL_image_external")) { + context->error(@1, "unsupported type", "samplerExternalOES"); + context->recover(); + } + TQualifier qual = context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary; + $$.setBasic(EbtSamplerExternalOES, qual, @1); + } + | SAMPLER2DRECT { + if (!context->supportsExtension("GL_ARB_texture_rectangle")) { + context->error(@1, "unsupported type", "sampler2DRect"); + context->recover(); + } + TQualifier qual = context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary; + $$.setBasic(EbtSampler2DRect, qual, @1); + } + | struct_specifier { + $$ = $1; + $$.qualifier = context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary; + } + | TYPE_NAME { + // + // This is for user defined type names. The lexical phase looked up the + // type. + // + TType& structure = static_cast<TVariable*>($1.symbol)->getType(); + TQualifier qual = context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary; + $$.setBasic(EbtStruct, qual, @1); + $$.userDef = &structure; + } + ; + +struct_specifier + : STRUCT identifier LEFT_BRACE { if (context->enterStructDeclaration(@2, *$2.string)) context->recover(); } struct_declaration_list RIGHT_BRACE { + if (context->reservedErrorCheck(@2, *$2.string)) + context->recover(); + + TType* structure = new TType(new TStructure($2.string, $5)); + TVariable* userTypeDef = new TVariable($2.string, *structure, true); + if (! context->symbolTable.insert(*userTypeDef)) { + context->error(@2, "redefinition", $2.string->c_str(), "struct"); + context->recover(); + } + $$.setBasic(EbtStruct, EvqTemporary, @1); + $$.userDef = structure; + context->exitStructDeclaration(); + } + | STRUCT LEFT_BRACE { if (context->enterStructDeclaration(@2, *$2.string)) context->recover(); } struct_declaration_list RIGHT_BRACE { + TType* structure = new TType(new TStructure(NewPoolTString(""), $4)); + $$.setBasic(EbtStruct, EvqTemporary, @1); + $$.userDef = structure; + context->exitStructDeclaration(); + } + ; + +struct_declaration_list + : struct_declaration { + $$ = $1; + } + | struct_declaration_list struct_declaration { + $$ = $1; + for (size_t i = 0; i < $2->size(); ++i) { + TField* field = (*$2)[i]; + for (size_t j = 0; j < $$->size(); ++j) { + if ((*$$)[j]->name() == field->name()) { + context->error(@2, "duplicate field name in structure:", "struct", field->name().c_str()); + context->recover(); + } + } + $$->push_back(field); + } + } + ; + +struct_declaration + : type_specifier struct_declarator_list SEMICOLON { + $$ = $2; + + if (context->voidErrorCheck(@1, (*$2)[0]->name(), $1)) { + context->recover(); + } + for (unsigned int i = 0; i < $$->size(); ++i) { + // + // Careful not to replace already known aspects of type, like array-ness + // + TType* type = (*$$)[i]->type(); + type->setBasicType($1.type); + type->setNominalSize($1.size); + type->setMatrix($1.matrix); + type->setPrecision($1.precision); + + // don't allow arrays of arrays + if (type->isArray()) { + if (context->arrayTypeErrorCheck(@1, $1)) + context->recover(); + } + if ($1.array) + type->setArraySize($1.arraySize); + if ($1.userDef) + type->setStruct($1.userDef->getStruct()); + + if (context->structNestingErrorCheck(@1, *(*$$)[i])) + context->recover(); + } + } + ; + +struct_declarator_list + : struct_declarator { + $$ = NewPoolTFieldList(); + $$->push_back($1); + } + | struct_declarator_list COMMA struct_declarator { + $$->push_back($3); + } + ; + +struct_declarator + : identifier { + if (context->reservedErrorCheck(@1, *$1.string)) + context->recover(); + + TType* type = new TType(EbtVoid, EbpUndefined); + $$ = new TField(type, $1.string); + } + | identifier LEFT_BRACKET constant_expression RIGHT_BRACKET { + if (context->reservedErrorCheck(@1, *$1.string)) + context->recover(); + + TType* type = new TType(EbtVoid, EbpUndefined); + int size = 0; + if (context->arraySizeErrorCheck(@3, $3, size)) + context->recover(); + type->setArraySize(size); + + $$ = new TField(type, $1.string); + } + ; + +initializer + : assignment_expression { $$ = $1; } + ; + +declaration_statement + : declaration { $$ = $1; } + ; + +statement + : compound_statement { $$ = $1; } + | simple_statement { $$ = $1; } + ; + +// Grammar Note: No labeled statements; 'goto' is not supported. + +simple_statement + : declaration_statement { $$ = $1; } + | expression_statement { $$ = $1; } + | selection_statement { $$ = $1; } + | iteration_statement { $$ = $1; } + | jump_statement { $$ = $1; } + ; + +compound_statement + : LEFT_BRACE RIGHT_BRACE { $$ = 0; } + | LEFT_BRACE { context->symbolTable.push(); } statement_list { context->symbolTable.pop(); } RIGHT_BRACE { + if ($3 != 0) { + $3->setOp(EOpSequence); + $3->setLine(@$); + } + $$ = $3; + } + ; + +statement_no_new_scope + : compound_statement_no_new_scope { $$ = $1; } + | simple_statement { $$ = $1; } + ; + +statement_with_scope + : { context->symbolTable.push(); } compound_statement_no_new_scope { context->symbolTable.pop(); $$ = $2; } + | { context->symbolTable.push(); } simple_statement { context->symbolTable.pop(); $$ = $2; } + ; + +compound_statement_no_new_scope + // Statement that doesn't create a new scope, for selection_statement, iteration_statement + : LEFT_BRACE RIGHT_BRACE { + $$ = 0; + } + | LEFT_BRACE statement_list RIGHT_BRACE { + if ($2) { + $2->setOp(EOpSequence); + $2->setLine(@$); + } + $$ = $2; + } + ; + +statement_list + : statement { + $$ = context->intermediate.makeAggregate($1, @$); + } + | statement_list statement { + $$ = context->intermediate.growAggregate($1, $2, @$); + } + ; + +expression_statement + : SEMICOLON { $$ = 0; } + | expression SEMICOLON { $$ = static_cast<TIntermNode*>($1); } + ; + +selection_statement + : IF LEFT_PAREN expression RIGHT_PAREN selection_rest_statement { + if (context->boolErrorCheck(@1, $3)) + context->recover(); + $$ = context->intermediate.addSelection($3, $5, @1); + } + ; + +selection_rest_statement + : statement_with_scope ELSE statement_with_scope { + $$.node1 = $1; + $$.node2 = $3; + } + | statement_with_scope { + $$.node1 = $1; + $$.node2 = 0; + } + ; + +// Grammar Note: No 'switch'. Switch statements not supported. + +condition + // In 1996 c++ draft, conditions can include single declarations + : expression { + $$ = $1; + if (context->boolErrorCheck($1->getLine(), $1)) + context->recover(); + } + | fully_specified_type identifier EQUAL initializer { + TIntermNode* intermNode; + if (context->structQualifierErrorCheck(@2, $1)) + context->recover(); + if (context->boolErrorCheck(@2, $1)) + context->recover(); + + if (!context->executeInitializer(@2, *$2.string, $1, $4, intermNode)) + $$ = $4; + else { + context->recover(); + $$ = 0; + } + } + ; + +iteration_statement + : WHILE LEFT_PAREN { context->symbolTable.push(); ++context->loopNestingLevel; } condition RIGHT_PAREN statement_no_new_scope { + context->symbolTable.pop(); + $$ = context->intermediate.addLoop(ELoopWhile, 0, $4, 0, $6, @1); + --context->loopNestingLevel; + } + | DO { ++context->loopNestingLevel; } statement_with_scope WHILE LEFT_PAREN expression RIGHT_PAREN SEMICOLON { + if (context->boolErrorCheck(@8, $6)) + context->recover(); + + $$ = context->intermediate.addLoop(ELoopDoWhile, 0, $6, 0, $3, @4); + --context->loopNestingLevel; + } + | FOR LEFT_PAREN { context->symbolTable.push(); ++context->loopNestingLevel; } for_init_statement for_rest_statement RIGHT_PAREN statement_no_new_scope { + context->symbolTable.pop(); + $$ = context->intermediate.addLoop(ELoopFor, $4, reinterpret_cast<TIntermTyped*>($5.node1), reinterpret_cast<TIntermTyped*>($5.node2), $7, @1); + --context->loopNestingLevel; + } + ; + +for_init_statement + : expression_statement { + $$ = $1; + } + | declaration_statement { + $$ = $1; + } + ; + +conditionopt + : condition { + $$ = $1; + } + | /* May be null */ { + $$ = 0; + } + ; + +for_rest_statement + : conditionopt SEMICOLON { + $$.node1 = $1; + $$.node2 = 0; + } + | conditionopt SEMICOLON expression { + $$.node1 = $1; + $$.node2 = $3; + } + ; + +jump_statement + : CONTINUE SEMICOLON { + if (context->loopNestingLevel <= 0) { + context->error(@1, "continue statement only allowed in loops", ""); + context->recover(); + } + $$ = context->intermediate.addBranch(EOpContinue, @1); + } + | BREAK SEMICOLON { + if (context->loopNestingLevel <= 0) { + context->error(@1, "break statement only allowed in loops", ""); + context->recover(); + } + $$ = context->intermediate.addBranch(EOpBreak, @1); + } + | RETURN SEMICOLON { + $$ = context->intermediate.addBranch(EOpReturn, @1); + if (context->currentFunctionType->getBasicType() != EbtVoid) { + context->error(@1, "non-void function must return a value", "return"); + context->recover(); + } + } + | RETURN expression SEMICOLON { + $$ = context->intermediate.addBranch(EOpReturn, $2, @1); + context->functionReturnsValue = true; + if (context->currentFunctionType->getBasicType() == EbtVoid) { + context->error(@1, "void function cannot return a value", "return"); + context->recover(); + } else if (*(context->currentFunctionType) != $2->getType()) { + context->error(@1, "function return is not matching type:", "return"); + context->recover(); + } + } + | DISCARD SEMICOLON { + FRAG_ONLY("discard", @1); + $$ = context->intermediate.addBranch(EOpKill, @1); + } + ; + +// Grammar Note: No 'goto'. Gotos are not supported. + +translation_unit + : external_declaration { + $$ = $1; + context->treeRoot = $$; + } + | translation_unit external_declaration { + $$ = context->intermediate.growAggregate($1, $2, @$); + context->treeRoot = $$; + } + ; + +external_declaration + : function_definition { + $$ = $1; + } + | declaration { + $$ = $1; + } + ; + +function_definition + : function_prototype { + TFunction* function = $1.function; + + const TSymbol *builtIn = context->symbolTable.findBuiltIn(function->getMangledName()); + + if (builtIn) + { + context->error(@1, "built-in functions cannot be redefined", function->getName().c_str()); + context->recover(); + } + + TFunction* prevDec = static_cast<TFunction*>(context->symbolTable.find(function->getMangledName())); + // + // Note: 'prevDec' could be 'function' if this is the first time we've seen function + // as it would have just been put in the symbol table. Otherwise, we're looking up + // an earlier occurance. + // + if (prevDec->isDefined()) { + // + // Then this function already has a body. + // + context->error(@1, "function already has a body", function->getName().c_str()); + context->recover(); + } + prevDec->setDefined(); + + // + // Raise error message if main function takes any parameters or return anything other than void + // + if (function->getName() == "main") { + if (function->getParamCount() > 0) { + context->error(@1, "function cannot take any parameter(s)", function->getName().c_str()); + context->recover(); + } + if (function->getReturnType().getBasicType() != EbtVoid) { + context->error(@1, "", function->getReturnType().getBasicString(), "main function cannot return a value"); + context->recover(); + } + } + + // + // Remember the return type for later checking for RETURN statements. + // + context->currentFunctionType = &(prevDec->getReturnType()); + context->functionReturnsValue = false; + + // + // Insert parameters into the symbol table. + // If the parameter has no name, it's not an error, just don't insert it + // (could be used for unused args). + // + // Also, accumulate the list of parameters into the HIL, so lower level code + // knows where to find parameters. + // + TIntermAggregate* paramNodes = new TIntermAggregate; + for (size_t i = 0; i < function->getParamCount(); i++) { + const TParameter& param = function->getParam(i); + if (param.name != 0) { + TVariable *variable = new TVariable(param.name, *param.type); + // + // Insert the parameters with name in the symbol table. + // + if (! context->symbolTable.insert(*variable)) { + context->error(@1, "redefinition", variable->getName().c_str()); + context->recover(); + delete variable; + } + + // + // Add the parameter to the HIL + // + paramNodes = context->intermediate.growAggregate( + paramNodes, + context->intermediate.addSymbol(variable->getUniqueId(), + variable->getName(), + variable->getType(), + @1), + @1); + } else { + paramNodes = context->intermediate.growAggregate(paramNodes, context->intermediate.addSymbol(0, "", *param.type, @1), @1); + } + } + context->intermediate.setAggregateOperator(paramNodes, EOpParameters, @1); + $1.intermAggregate = paramNodes; + context->loopNestingLevel = 0; + } + compound_statement_no_new_scope { + //?? Check that all paths return a value if return type != void ? + // May be best done as post process phase on intermediate code + if (context->currentFunctionType->getBasicType() != EbtVoid && ! context->functionReturnsValue) { + context->error(@1, "function does not return a value:", "", $1.function->getName().c_str()); + context->recover(); + } + + $$ = context->intermediate.growAggregate($1.intermAggregate, $3, @$); + context->intermediate.setAggregateOperator($$, EOpFunction, @1); + $$->getAsAggregate()->setName($1.function->getMangledName().c_str()); + $$->getAsAggregate()->setType($1.function->getReturnType()); + + // store the pragma information for debug and optimize and other vendor specific + // information. This information can be queried from the parse tree + $$->getAsAggregate()->setOptimize(context->pragma().optimize); + $$->getAsAggregate()->setDebug(context->pragma().debug); + + context->symbolTable.pop(); + } + ; + +%% + +int glslang_parse(TParseContext* context) { + return yyparse(context); +} |