blob: b1dd8a8d9d83056fa46165d9064cda468a9244dd [file] [log] [blame]
/*
//
// Copyright 2002 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 scripts/run_code_generation.py
WHICH GENERATES THE GLSL ES PARSER (glslang_tab_autogen.cpp AND glslang_tab_autogen.h).
*/
%{
// GENERATED FILE - DO NOT EDIT.
// Generated by generate_parser.py from glslang.y
//
// Copyright 2019 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.
//
// glslang.y:
// Parser for the OpenGL shading language.
// clang-format off
// 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: 4244)
#pragma warning(disable: 4505)
#pragma warning(disable: 4701)
#pragma warning(disable: 4702)
#endif
#if defined(__clang__)
#pragma clang diagnostic ignored "-Wunreachable-code"
#endif
#include "angle_gl.h"
#include "compiler/translator/Declarator.h"
#include "compiler/translator/SymbolTable.h"
#include "compiler/translator/ParseContext.h"
#include "GLSLANG/ShaderLang.h"
#define YYENABLE_NLS 0
using namespace sh;
%}
%expect 1 /* One shift reduce conflict because of if | else */
%parse-param {TParseContext* context}
%param {void *scanner}
%define api.pure full
%locations
%code requires {
#define YYLTYPE TSourceLoc
#define YYLTYPE_IS_DECLARED 1
#define YYLTYPE_IS_TRIVIAL 1
}
%union {
struct {
union {
const char *string; // pool allocated.
float f;
int i;
unsigned int u;
bool b;
};
const TSymbol* symbol;
} lex;
struct {
TOperator op;
union {
TIntermNode *intermNode;
TIntermNodePair nodePair;
TIntermTyped *intermTypedNode;
TIntermAggregate *intermAggregate;
TIntermBlock *intermBlock;
TIntermDeclaration *intermDeclaration;
TIntermFunctionPrototype *intermFunctionPrototype;
TIntermSwitch *intermSwitch;
TIntermCase *intermCase;
};
union {
TVector<unsigned int> *arraySizes;
TTypeSpecifierNonArray typeSpecifierNonArray;
TPublicType type;
TPrecision precision;
TLayoutQualifier layoutQualifier;
TQualifier qualifier;
TFunction *function;
TFunctionLookup *functionLookup;
TParameter param;
TDeclarator *declarator;
TDeclaratorList *declaratorList;
TFieldList *fieldList;
TQualifierWrapperBase *qualifierWrapper;
TTypeQualifierBuilder *typeQualifierBuilder;
};
} interm;
}
%{
extern int yylex(YYSTYPE* yylval, YYLTYPE* yylloc, void* yyscanner);
extern void yyerror(YYLTYPE* yylloc, TParseContext* context, void *scanner, const char* reason);
#define YYLLOC_DEFAULT(Current, Rhs, N) \
do { \
if (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) do { \
if (context->getShaderType() != GL_VERTEX_SHADER) { \
context->error(L, " supported in vertex shaders only", S); \
} \
} while (0)
#define COMPUTE_ONLY(S, L) do { \
if (context->getShaderType() != GL_COMPUTE_SHADER) { \
context->error(L, " supported in compute shaders only", S); \
} \
} while (0)
#define ES2_ONLY(S, L) do { \
if (context->getShaderVersion() != 100) { \
context->error(L, " supported in GLSL ES 1.00 only", S); \
} \
} while (0)
#define ES3_OR_NEWER(TOKEN, LINE, REASON) do { \
if (context->getShaderVersion() < 300) { \
context->error(LINE, REASON " supported in GLSL ES 3.00 and above only", TOKEN); \
} \
} while (0)
#define ES3_1_ONLY(TOKEN, LINE, REASON) do { \
if (context->getShaderVersion() != 310) { \
context->error(LINE, REASON " supported in GLSL ES 3.10 only", TOKEN); \
} \
} while (0)
%}
%token <lex> INVARIANT HIGH_PRECISION MEDIUM_PRECISION LOW_PRECISION PRECISION
%token <lex> ATTRIBUTE CONST_QUAL BOOL_TYPE FLOAT_TYPE INT_TYPE UINT_TYPE
%token <lex> BREAK CONTINUE DO ELSE FOR IF DISCARD RETURN SWITCH CASE DEFAULT
%token <lex> BVEC2 BVEC3 BVEC4 IVEC2 IVEC3 IVEC4 VEC2 VEC3 VEC4 UVEC2 UVEC3 UVEC4
%token <lex> MATRIX2 MATRIX3 MATRIX4 IN_QUAL OUT_QUAL INOUT_QUAL UNIFORM BUFFER VARYING
%token <lex> MATRIX2x3 MATRIX3x2 MATRIX2x4 MATRIX4x2 MATRIX3x4 MATRIX4x3
%token <lex> CENTROID FLAT SMOOTH
%token <lex> READONLY WRITEONLY COHERENT RESTRICT VOLATILE SHARED
%token <lex> STRUCT VOID_TYPE WHILE
%token <lex> SAMPLER2D SAMPLERCUBE SAMPLER_EXTERNAL_OES SAMPLER2DRECT SAMPLER2DARRAY
%token <lex> ISAMPLER2D ISAMPLER3D ISAMPLERCUBE ISAMPLER2DARRAY
%token <lex> USAMPLER2D USAMPLER3D USAMPLERCUBE USAMPLER2DARRAY
%token <lex> SAMPLER2DMS ISAMPLER2DMS USAMPLER2DMS
%token <lex> SAMPLER2DMSARRAY ISAMPLER2DMSARRAY USAMPLER2DMSARRAY
%token <lex> SAMPLER3D SAMPLER3DRECT SAMPLER2DSHADOW SAMPLERCUBESHADOW SAMPLER2DARRAYSHADOW
%token <lex> SAMPLEREXTERNAL2DY2YEXT
%token <lex> IMAGE2D IIMAGE2D UIMAGE2D IMAGE3D IIMAGE3D UIMAGE3D IMAGE2DARRAY IIMAGE2DARRAY UIMAGE2DARRAY
%token <lex> IMAGECUBE IIMAGECUBE UIMAGECUBE
%token <lex> ATOMICUINT
%token <lex> LAYOUT
%token <lex> YUVCSCSTANDARDEXT YUVCSCSTANDARDEXTCONSTANT
%token <lex> IDENTIFIER TYPE_NAME FLOATCONSTANT INTCONSTANT UINTCONSTANT BOOLCONSTANT
%token <lex> FIELD_SELECTION
%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.op> 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
%type <interm.intermNode> condition conditionopt
%type <interm.intermBlock> translation_unit
%type <interm.intermNode> function_definition statement simple_statement
%type <interm.intermBlock> statement_list compound_statement_with_scope compound_statement_no_new_scope
%type <interm.intermNode> declaration_statement selection_statement expression_statement
%type <interm.intermNode> declaration external_declaration
%type <interm.intermNode> for_init_statement
%type <interm.nodePair> selection_rest_statement for_rest_statement
%type <interm.intermSwitch> switch_statement
%type <interm.intermCase> case_label
%type <interm.intermNode> iteration_statement jump_statement statement_no_new_scope statement_with_scope
%type <interm> single_declaration init_declarator_list
%type <interm.param> parameter_declaration parameter_declarator parameter_type_specifier
%type <interm.layoutQualifier> layout_qualifier_id_list layout_qualifier_id
// Note: array_specifier guaranteed to be non-null.
%type <interm.arraySizes> array_specifier
%type <interm.type> fully_specified_type type_specifier
%type <interm.precision> precision_qualifier
%type <interm.layoutQualifier> layout_qualifier
%type <interm.qualifier> interpolation_qualifier
%type <interm.qualifierWrapper> storage_qualifier single_type_qualifier invariant_qualifier
%type <interm.typeQualifierBuilder> type_qualifier
%type <interm.typeSpecifierNonArray> type_specifier_nonarray struct_specifier
%type <interm.type> type_specifier_no_prec
%type <interm.declarator> struct_declarator
%type <interm.declaratorList> struct_declarator_list
%type <interm.fieldList> struct_declaration struct_declaration_list
%type <interm.function> function_header function_declarator
%type <interm.function> function_header_with_parameters
%type <interm.functionLookup> function_identifier function_call_header
%type <interm.functionLookup> function_call_header_with_parameters function_call_header_no_parameters
%type <interm.functionLookup> function_call_generic function_call_or_method
%type <interm> function_prototype
%type <lex> enter_struct
%start translation_unit
%%
identifier
: IDENTIFIER
| TYPE_NAME
variable_identifier
: IDENTIFIER {
// The symbol table search was done in the lexical phase
$$ = context->parseVariableIdentifier(@1, ImmutableString($1.string), $1.symbol);
}
;
primary_expression
: variable_identifier {
$$ = $1;
}
| INTCONSTANT {
TConstantUnion *unionArray = new TConstantUnion[1];
unionArray->setIConst($1.i);
$$ = context->addScalarLiteral(unionArray, @1);
}
| UINTCONSTANT {
TConstantUnion *unionArray = new TConstantUnion[1];
unionArray->setUConst($1.u);
$$ = context->addScalarLiteral(unionArray, @1);
}
| FLOATCONSTANT {
TConstantUnion *unionArray = new TConstantUnion[1];
unionArray->setFConst($1.f);
$$ = context->addScalarLiteral(unionArray, @1);
}
| BOOLCONSTANT {
TConstantUnion *unionArray = new TConstantUnion[1];
unionArray->setBConst($1.b);
$$ = context->addScalarLiteral(unionArray, @1);
}
| YUVCSCSTANDARDEXTCONSTANT {
if (!context->checkCanUseExtension(@1, TExtension::EXT_YUV_target))
{
context->error(@1, "unsupported value", ImmutableString($1.string));
}
TConstantUnion *unionArray = new TConstantUnion[1];
unionArray->setYuvCscStandardEXTConst(getYuvCscStandardEXT(ImmutableString($1.string)));
$$ = context->addScalarLiteral(unionArray, @1);
}
| LEFT_PAREN expression RIGHT_PAREN {
$$ = $2;
}
;
postfix_expression
: primary_expression {
$$ = $1;
}
| postfix_expression LEFT_BRACKET integer_expression RIGHT_BRACKET {
$$ = context->addIndexExpression($1, @2, $3);
}
| function_call {
$$ = $1;
}
| postfix_expression DOT FIELD_SELECTION {
$$ = context->addFieldSelectionExpression($1, @2, ImmutableString($3.string), @3);
}
| postfix_expression INC_OP {
$$ = context->addUnaryMathLValue(EOpPostIncrement, $1, @2);
}
| postfix_expression DEC_OP {
$$ = context->addUnaryMathLValue(EOpPostDecrement, $1, @2);
}
;
integer_expression
: expression {
context->checkIsScalarInteger($1, "[]");
$$ = $1;
}
;
function_call
: function_call_or_method {
$$ = context->addFunctionCallOrMethod($1, @1);
}
;
function_call_or_method
: function_call_generic {
$$ = $1;
}
| postfix_expression DOT function_call_generic {
ES3_OR_NEWER("", @3, "methods");
$$ = $3;
$$->setThisNode($1);
}
;
function_call_generic
: function_call_header_with_parameters RIGHT_PAREN {
$$ = $1;
}
| function_call_header_no_parameters RIGHT_PAREN {
$$ = $1;
}
;
function_call_header_no_parameters
: function_call_header VOID_TYPE {
$$ = $1;
}
| function_call_header {
$$ = $1;
}
;
function_call_header_with_parameters
: function_call_header assignment_expression {
$$ = $1;
$$->addArgument($2);
}
| function_call_header_with_parameters COMMA assignment_expression {
$$ = $1;
$$->addArgument($3);
}
;
function_call_header
: function_identifier LEFT_PAREN {
$$ = $1;
}
;
// Grammar Note: Constructors look like functions, but are recognized as types.
function_identifier
: type_specifier_no_prec {
$$ = context->addConstructorFunc($1);
}
| IDENTIFIER {
$$ = context->addNonConstructorFunc(ImmutableString($1.string), $1.symbol);
}
| FIELD_SELECTION {
$$ = context->addNonConstructorFunc(ImmutableString($1.string), $1.symbol);
}
;
unary_expression
: postfix_expression {
$$ = $1;
}
| INC_OP unary_expression {
$$ = context->addUnaryMathLValue(EOpPreIncrement, $2, @1);
}
| DEC_OP unary_expression {
$$ = context->addUnaryMathLValue(EOpPreDecrement, $2, @1);
}
| unary_operator unary_expression {
$$ = context->addUnaryMath($1, $2, @1);
}
;
// Grammar Note: No traditional style type casts.
unary_operator
: PLUS { $$ = EOpPositive; }
| DASH { $$ = EOpNegative; }
| BANG { $$ = EOpLogicalNot; }
| TILDE {
ES3_OR_NEWER("~", @$, "bit-wise operator");
$$ = EOpBitwiseNot;
}
;
// Grammar Note: No '*' or '&' unary ops. Pointers are not supported.
multiplicative_expression
: unary_expression { $$ = $1; }
| multiplicative_expression STAR unary_expression {
$$ = context->addBinaryMath(EOpMul, $1, $3, @2);
}
| multiplicative_expression SLASH unary_expression {
$$ = context->addBinaryMath(EOpDiv, $1, $3, @2);
}
| multiplicative_expression PERCENT unary_expression {
ES3_OR_NEWER("%", @2, "integer modulus operator");
$$ = context->addBinaryMath(EOpIMod, $1, $3, @2);
}
;
additive_expression
: multiplicative_expression { $$ = $1; }
| additive_expression PLUS multiplicative_expression {
$$ = context->addBinaryMath(EOpAdd, $1, $3, @2);
}
| additive_expression DASH multiplicative_expression {
$$ = context->addBinaryMath(EOpSub, $1, $3, @2);
}
;
shift_expression
: additive_expression { $$ = $1; }
| shift_expression LEFT_OP additive_expression {
ES3_OR_NEWER("<<", @2, "bit-wise operator");
$$ = context->addBinaryMath(EOpBitShiftLeft, $1, $3, @2);
}
| shift_expression RIGHT_OP additive_expression {
ES3_OR_NEWER(">>", @2, "bit-wise operator");
$$ = context->addBinaryMath(EOpBitShiftRight, $1, $3, @2);
}
;
relational_expression
: shift_expression { $$ = $1; }
| relational_expression LEFT_ANGLE shift_expression {
$$ = context->addBinaryMathBooleanResult(EOpLessThan, $1, $3, @2);
}
| relational_expression RIGHT_ANGLE shift_expression {
$$ = context->addBinaryMathBooleanResult(EOpGreaterThan, $1, $3, @2);
}
| relational_expression LE_OP shift_expression {
$$ = context->addBinaryMathBooleanResult(EOpLessThanEqual, $1, $3, @2);
}
| relational_expression GE_OP shift_expression {
$$ = context->addBinaryMathBooleanResult(EOpGreaterThanEqual, $1, $3, @2);
}
;
equality_expression
: relational_expression { $$ = $1; }
| equality_expression EQ_OP relational_expression {
$$ = context->addBinaryMathBooleanResult(EOpEqual, $1, $3, @2);
}
| equality_expression NE_OP relational_expression {
$$ = context->addBinaryMathBooleanResult(EOpNotEqual, $1, $3, @2);
}
;
and_expression
: equality_expression { $$ = $1; }
| and_expression AMPERSAND equality_expression {
ES3_OR_NEWER("&", @2, "bit-wise operator");
$$ = context->addBinaryMath(EOpBitwiseAnd, $1, $3, @2);
}
;
exclusive_or_expression
: and_expression { $$ = $1; }
| exclusive_or_expression CARET and_expression {
ES3_OR_NEWER("^", @2, "bit-wise operator");
$$ = context->addBinaryMath(EOpBitwiseXor, $1, $3, @2);
}
;
inclusive_or_expression
: exclusive_or_expression { $$ = $1; }
| inclusive_or_expression VERTICAL_BAR exclusive_or_expression {
ES3_OR_NEWER("|", @2, "bit-wise operator");
$$ = context->addBinaryMath(EOpBitwiseOr, $1, $3, @2);
}
;
logical_and_expression
: inclusive_or_expression { $$ = $1; }
| logical_and_expression AND_OP inclusive_or_expression {
$$ = context->addBinaryMathBooleanResult(EOpLogicalAnd, $1, $3, @2);
}
;
logical_xor_expression
: logical_and_expression { $$ = $1; }
| logical_xor_expression XOR_OP logical_and_expression {
$$ = context->addBinaryMathBooleanResult(EOpLogicalXor, $1, $3, @2);
}
;
logical_or_expression
: logical_xor_expression { $$ = $1; }
| logical_or_expression OR_OP logical_xor_expression {
$$ = context->addBinaryMathBooleanResult(EOpLogicalOr, $1, $3, @2);
}
;
conditional_expression
: logical_or_expression { $$ = $1; }
| logical_or_expression QUESTION expression COLON assignment_expression {
$$ = context->addTernarySelection($1, $3, $5, @2);
}
;
assignment_expression
: conditional_expression { $$ = $1; }
| unary_expression assignment_operator assignment_expression {
$$ = context->addAssign($2, $1, $3, @2);
}
;
assignment_operator
: EQUAL { $$ = EOpAssign; }
| MUL_ASSIGN { $$ = EOpMulAssign; }
| DIV_ASSIGN { $$ = EOpDivAssign; }
| MOD_ASSIGN {
ES3_OR_NEWER("%=", @$, "integer modulus operator");
$$ = EOpIModAssign;
}
| ADD_ASSIGN { $$ = EOpAddAssign; }
| SUB_ASSIGN { $$ = EOpSubAssign; }
| LEFT_ASSIGN {
ES3_OR_NEWER("<<=", @$, "bit-wise operator");
$$ = EOpBitShiftLeftAssign;
}
| RIGHT_ASSIGN {
ES3_OR_NEWER(">>=", @$, "bit-wise operator");
$$ = EOpBitShiftRightAssign;
}
| AND_ASSIGN {
ES3_OR_NEWER("&=", @$, "bit-wise operator");
$$ = EOpBitwiseAndAssign;
}
| XOR_ASSIGN {
ES3_OR_NEWER("^=", @$, "bit-wise operator");
$$ = EOpBitwiseXorAssign;
}
| OR_ASSIGN {
ES3_OR_NEWER("|=", @$, "bit-wise operator");
$$ = EOpBitwiseOrAssign;
}
;
expression
: assignment_expression {
$$ = $1;
}
| expression COMMA assignment_expression {
$$ = context->addComma($1, $3, @2);
}
;
constant_expression
: conditional_expression {
context->checkIsConst($1);
$$ = $1;
}
;
enter_struct
: IDENTIFIER LEFT_BRACE {
context->enterStructDeclaration(@1, ImmutableString($1.string));
$$ = $1;
}
;
declaration
: function_prototype SEMICOLON {
$$ = context->addFunctionPrototypeDeclaration(*($1.function), @1);
}
| init_declarator_list SEMICOLON {
$$ = $1.intermDeclaration;
}
| PRECISION precision_qualifier type_specifier_no_prec SEMICOLON {
context->parseDefaultPrecisionQualifier($2, $3, @1);
$$ = nullptr;
}
| type_qualifier enter_struct struct_declaration_list RIGHT_BRACE SEMICOLON {
ES3_OR_NEWER(ImmutableString($2.string), @1, "interface blocks");
$$ = context->addInterfaceBlock(*$1, @2, ImmutableString($2.string), $3, kEmptyImmutableString, @$, NULL, @$);
}
| type_qualifier enter_struct struct_declaration_list RIGHT_BRACE IDENTIFIER SEMICOLON {
ES3_OR_NEWER(ImmutableString($2.string), @1, "interface blocks");
$$ = context->addInterfaceBlock(*$1, @2, ImmutableString($2.string), $3, ImmutableString($5.string), @5, NULL, @$);
}
| type_qualifier enter_struct struct_declaration_list RIGHT_BRACE IDENTIFIER LEFT_BRACKET constant_expression RIGHT_BRACKET SEMICOLON {
ES3_OR_NEWER(ImmutableString($2.string), @1, "interface blocks");
$$ = context->addInterfaceBlock(*$1, @2, ImmutableString($2.string), $3, ImmutableString($5.string), @5, $7, @6);
}
| type_qualifier SEMICOLON {
context->parseGlobalLayoutQualifier(*$1);
$$ = nullptr;
}
| type_qualifier IDENTIFIER SEMICOLON // e.g. to qualify an existing variable as invariant
{
$$ = context->parseInvariantDeclaration(*$1, @2, ImmutableString($2.string), $2.symbol);
}
;
function_prototype
: function_declarator RIGHT_PAREN {
$$.function = context->parseFunctionDeclarator(@2, $1);
context->exitFunctionDeclaration();
}
;
function_declarator
: function_header {
$$ = $1;
}
| function_header_with_parameters {
$$ = $1;
}
;
function_header_with_parameters
: function_header parameter_declaration {
// Add the parameter
$$ = $1;
if ($2.type->getBasicType() != EbtVoid)
{
$1->addParameter($2.createVariable(&context->symbolTable));
}
}
| function_header_with_parameters COMMA parameter_declaration {
$$ = $1;
// Only first parameter of one-parameter functions can be void
// The check for named parameters not being void is done in parameter_declarator
if ($3.type->getBasicType() == EbtVoid)
{
// This parameter > first is void
context->error(@2, "cannot be a parameter type except for '(void)'", "void");
}
else
{
$1->addParameter($3.createVariable(&context->symbolTable));
}
}
;
function_header
: fully_specified_type IDENTIFIER LEFT_PAREN {
$$ = context->parseFunctionHeader($1, ImmutableString($2.string), @2);
context->symbolTable.push();
context->enterFunctionDeclaration();
}
;
parameter_declarator
// Type + name
: type_specifier identifier {
$$ = context->parseParameterDeclarator($1, ImmutableString($2.string), @2);
}
| type_specifier identifier array_specifier {
$$ = context->parseParameterArrayDeclarator(ImmutableString($2.string), @2, *($3), @3, &$1);
}
;
parameter_declaration
: type_qualifier parameter_declarator {
$$ = $2;
context->checkIsParameterQualifierValid(@2, *$1, $2.type);
}
| parameter_declarator {
$$ = $1;
$$.type->setQualifier(EvqIn);
}
| type_qualifier parameter_type_specifier {
$$ = $2;
context->checkIsParameterQualifierValid(@2, *$1, $2.type);
}
| parameter_type_specifier {
$$ = $1;
$$.type->setQualifier(EvqIn);
}
;
parameter_type_specifier
: type_specifier {
TParameter param = { 0, new TType($1) };
$$ = param;
}
;
init_declarator_list
: single_declaration {
$$ = $1;
}
| init_declarator_list COMMA identifier {
$$ = $1;
context->parseDeclarator($$.type, @3, ImmutableString($3.string), $$.intermDeclaration);
}
| init_declarator_list COMMA identifier array_specifier {
$$ = $1;
context->parseArrayDeclarator($$.type, @3, ImmutableString($3.string), @4, *($4), $$.intermDeclaration);
}
| init_declarator_list COMMA identifier array_specifier EQUAL initializer {
ES3_OR_NEWER("=", @5, "first-class arrays (array initializer)");
$$ = $1;
context->parseArrayInitDeclarator($$.type, @3, ImmutableString($3.string), @4, *($4), @5, $6, $$.intermDeclaration);
}
| init_declarator_list COMMA identifier EQUAL initializer {
$$ = $1;
context->parseInitDeclarator($$.type, @3, ImmutableString($3.string), @4, $5, $$.intermDeclaration);
}
;
single_declaration
: fully_specified_type {
$$.type = $1;
$$.intermDeclaration = context->parseSingleDeclaration($$.type, @1, kEmptyImmutableString);
}
| fully_specified_type identifier {
$$.type = $1;
$$.intermDeclaration = context->parseSingleDeclaration($$.type, @2, ImmutableString($2.string));
}
| fully_specified_type identifier array_specifier {
$$.type = $1;
$$.intermDeclaration = context->parseSingleArrayDeclaration($$.type, @2, ImmutableString($2.string), @3, *($3));
}
| fully_specified_type identifier array_specifier EQUAL initializer {
ES3_OR_NEWER("[]", @3, "first-class arrays (array initializer)");
$$.type = $1;
$$.intermDeclaration = context->parseSingleArrayInitDeclaration($$.type, @2, ImmutableString($2.string), @3, *($3), @4, $5);
}
| fully_specified_type identifier EQUAL initializer {
$$.type = $1;
$$.intermDeclaration = context->parseSingleInitDeclaration($$.type, @2, ImmutableString($2.string), @3, $4);
}
;
fully_specified_type
: type_specifier {
context->addFullySpecifiedType(&$1);
$$ = $1;
}
| type_qualifier type_specifier {
$$ = context->addFullySpecifiedType(*$1, $2);
}
;
interpolation_qualifier
: SMOOTH {
$$ = EvqSmooth;
}
| FLAT {
$$ = EvqFlat;
}
;
type_qualifier
: single_type_qualifier {
$$ = context->createTypeQualifierBuilder(@1);
$$->appendQualifier($1);
}
| type_qualifier single_type_qualifier {
$$ = $1;
$$->appendQualifier($2);
}
;
invariant_qualifier
: INVARIANT {
// empty
}
;
single_type_qualifier
: storage_qualifier {
context->checkLocalVariableConstStorageQualifier(*$1);
$$ = $1;
}
| layout_qualifier {
context->checkIsAtGlobalLevel(@1, "layout");
$$ = new TLayoutQualifierWrapper($1, @1);
}
| precision_qualifier {
$$ = new TPrecisionQualifierWrapper($1, @1);
}
| interpolation_qualifier {
$$ = new TInterpolationQualifierWrapper($1, @1);
}
| invariant_qualifier {
context->checkIsAtGlobalLevel(@1, "invariant");
$$ = new TInvariantQualifierWrapper(@1);
}
;
storage_qualifier
:
ATTRIBUTE {
VERTEX_ONLY("attribute", @1);
ES2_ONLY("attribute", @1);
$$ = context->parseGlobalStorageQualifier(EvqAttribute, @1);
}
| VARYING {
ES2_ONLY("varying", @1);
$$ = context->parseVaryingQualifier(@1);
}
| CONST_QUAL {
$$ = new TStorageQualifierWrapper(EvqConst, @1);
}
| IN_QUAL {
$$ = context->parseInQualifier(@1);
}
| OUT_QUAL {
$$ = context->parseOutQualifier(@1);
}
| INOUT_QUAL {
$$ = context->parseInOutQualifier(@1);
}
| CENTROID {
ES3_OR_NEWER("centroid", @1, "storage qualifier");
$$ = new TStorageQualifierWrapper(EvqCentroid, @1);
}
| UNIFORM {
$$ = context->parseGlobalStorageQualifier(EvqUniform, @1);
}
| BUFFER {
ES3_1_ONLY("buffer", @1, "storage qualifier");
$$ = context->parseGlobalStorageQualifier(EvqBuffer, @1);
}
| READONLY {
$$ = new TMemoryQualifierWrapper(EvqReadOnly, @1);
}
| WRITEONLY {
$$ = new TMemoryQualifierWrapper(EvqWriteOnly, @1);
}
| COHERENT {
$$ = new TMemoryQualifierWrapper(EvqCoherent, @1);
}
| RESTRICT {
$$ = new TMemoryQualifierWrapper(EvqRestrict, @1);
}
| VOLATILE {
$$ = new TMemoryQualifierWrapper(EvqVolatile, @1);
}
| SHARED {
COMPUTE_ONLY("shared", @1);
$$ = context->parseGlobalStorageQualifier(EvqShared, @1);
}
;
type_specifier
: type_specifier_no_prec {
$$ = $1;
$$.precision = context->symbolTable.getDefaultPrecision($1.getBasicType());
}
;
precision_qualifier
: HIGH_PRECISION {
$$ = EbpHigh;
}
| MEDIUM_PRECISION {
$$ = EbpMedium;
}
| LOW_PRECISION {
$$ = EbpLow;
}
;
layout_qualifier
: LAYOUT LEFT_PAREN layout_qualifier_id_list RIGHT_PAREN {
ES3_OR_NEWER("layout", @1, "qualifier");
$$ = $3;
}
;
layout_qualifier_id_list
: layout_qualifier_id {
$$ = $1;
}
| layout_qualifier_id_list COMMA layout_qualifier_id {
$$ = context->joinLayoutQualifiers($1, $3, @3);
}
;
layout_qualifier_id
: IDENTIFIER {
$$ = context->parseLayoutQualifier(ImmutableString($1.string), @1);
}
| IDENTIFIER EQUAL INTCONSTANT {
$$ = context->parseLayoutQualifier(ImmutableString($1.string), @1, $3.i, @3);
}
| IDENTIFIER EQUAL UINTCONSTANT {
$$ = context->parseLayoutQualifier(ImmutableString($1.string), @1, $3.i, @3);
}
| SHARED {
$$ = context->parseLayoutQualifier(ImmutableString("shared"), @1);
}
;
type_specifier_no_prec
: type_specifier_nonarray {
$$.initialize($1, (context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary));
}
| type_specifier_nonarray array_specifier {
$$.initialize($1, (context->symbolTable.atGlobalLevel() ? EvqGlobal : EvqTemporary));
$$.setArraySizes($2);
}
;
array_specifier
: LEFT_BRACKET RIGHT_BRACKET {
ES3_OR_NEWER("[]", @1, "implicitly sized array");
$$ = new TVector<unsigned int>();
$$->push_back(0u);
}
| LEFT_BRACKET constant_expression RIGHT_BRACKET {
$$ = new TVector<unsigned int>();
unsigned int size = context->checkIsValidArraySize(@1, $2);
// Make the type an array even if size check failed.
// This ensures useless error messages regarding a variable's non-arrayness won't follow.
$$->push_back(size);
}
| array_specifier LEFT_BRACKET RIGHT_BRACKET {
ES3_1_ONLY("[]", @2, "arrays of arrays");
$$ = $1;
$$->insert($$->begin(), 0u);
}
| array_specifier LEFT_BRACKET constant_expression RIGHT_BRACKET {
ES3_1_ONLY("[]", @2, "arrays of arrays");
$$ = $1;
unsigned int size = context->checkIsValidArraySize(@2, $3);
// Make the type an array even if size check failed.
// This ensures useless error messages regarding a variable's non-arrayness won't follow.
$$->insert($$->begin(), size);
}
;
type_specifier_nonarray
: VOID_TYPE {
$$.initialize(EbtVoid, @1);
}
| FLOAT_TYPE {
$$.initialize(EbtFloat, @1);
}
| INT_TYPE {
$$.initialize(EbtInt, @1);
}
| UINT_TYPE {
$$.initialize(EbtUInt, @1);
}
| BOOL_TYPE {
$$.initialize(EbtBool, @1);
}
| VEC2 {
$$.initialize(EbtFloat, @1);
$$.setAggregate(2);
}
| VEC3 {
$$.initialize(EbtFloat, @1);
$$.setAggregate(3);
}
| VEC4 {
$$.initialize(EbtFloat, @1);
$$.setAggregate(4);
}
| BVEC2 {
$$.initialize(EbtBool, @1);
$$.setAggregate(2);
}
| BVEC3 {
$$.initialize(EbtBool, @1);
$$.setAggregate(3);
}
| BVEC4 {
$$.initialize(EbtBool, @1);
$$.setAggregate(4);
}
| IVEC2 {
$$.initialize(EbtInt, @1);
$$.setAggregate(2);
}
| IVEC3 {
$$.initialize(EbtInt, @1);
$$.setAggregate(3);
}
| IVEC4 {
$$.initialize(EbtInt, @1);
$$.setAggregate(4);
}
| UVEC2 {
$$.initialize(EbtUInt, @1);
$$.setAggregate(2);
}
| UVEC3 {
$$.initialize(EbtUInt, @1);
$$.setAggregate(3);
}
| UVEC4 {
$$.initialize(EbtUInt, @1);
$$.setAggregate(4);
}
| MATRIX2 {
$$.initialize(EbtFloat, @1);
$$.setMatrix(2, 2);
}
| MATRIX3 {
$$.initialize(EbtFloat, @1);
$$.setMatrix(3, 3);
}
| MATRIX4 {
$$.initialize(EbtFloat, @1);
$$.setMatrix(4, 4);
}
| MATRIX2x3 {
$$.initialize(EbtFloat, @1);
$$.setMatrix(2, 3);
}
| MATRIX3x2 {
$$.initialize(EbtFloat, @1);
$$.setMatrix(3, 2);
}
| MATRIX2x4 {
$$.initialize(EbtFloat, @1);
$$.setMatrix(2, 4);
}
| MATRIX4x2 {
$$.initialize(EbtFloat, @1);
$$.setMatrix(4, 2);
}
| MATRIX3x4 {
$$.initialize(EbtFloat, @1);
$$.setMatrix(3, 4);
}
| MATRIX4x3 {
$$.initialize(EbtFloat, @1);
$$.setMatrix(4, 3);
}
| YUVCSCSTANDARDEXT {
if (!context->checkCanUseExtension(@1, TExtension::EXT_YUV_target))
{
context->error(@1, "unsupported type", "yuvCscStandardEXT");
}
$$.initialize(EbtYuvCscStandardEXT, @1);
}
| SAMPLER2D {
$$.initialize(EbtSampler2D, @1);
}
| SAMPLER3D {
$$.initialize(EbtSampler3D, @1);
}
| SAMPLERCUBE {
$$.initialize(EbtSamplerCube, @1);
}
| SAMPLER2DARRAY {
$$.initialize(EbtSampler2DArray, @1);
}
| SAMPLER2DMS {
$$.initialize(EbtSampler2DMS, @1);
}
| SAMPLER2DMSARRAY {
$$.initialize(EbtSampler2DMSArray, @1);
}
| ISAMPLER2D {
$$.initialize(EbtISampler2D, @1);
}
| ISAMPLER3D {
$$.initialize(EbtISampler3D, @1);
}
| ISAMPLERCUBE {
$$.initialize(EbtISamplerCube, @1);
}
| ISAMPLER2DARRAY {
$$.initialize(EbtISampler2DArray, @1);
}
| ISAMPLER2DMS {
$$.initialize(EbtISampler2DMS, @1);
}
| ISAMPLER2DMSARRAY {
$$.initialize(EbtISampler2DMSArray, @1);
}
| USAMPLER2D {
$$.initialize(EbtUSampler2D, @1);
}
| USAMPLER3D {
$$.initialize(EbtUSampler3D, @1);
}
| USAMPLERCUBE {
$$.initialize(EbtUSamplerCube, @1);
}
| USAMPLER2DARRAY {
$$.initialize(EbtUSampler2DArray, @1);
}
| USAMPLER2DMS {
$$.initialize(EbtUSampler2DMS, @1);
}
| USAMPLER2DMSARRAY {
$$.initialize(EbtUSampler2DMSArray, @1);
}
| SAMPLER2DSHADOW {
$$.initialize(EbtSampler2DShadow, @1);
}
| SAMPLERCUBESHADOW {
$$.initialize(EbtSamplerCubeShadow, @1);
}
| SAMPLER2DARRAYSHADOW {
$$.initialize(EbtSampler2DArrayShadow, @1);
}
| SAMPLER_EXTERNAL_OES {
constexpr std::array<TExtension, 3u> extensions{ { TExtension::NV_EGL_stream_consumer_external,
TExtension::OES_EGL_image_external_essl3,
TExtension::OES_EGL_image_external } };
if (!context->checkCanUseOneOfExtensions(@1, extensions))
{
context->error(@1, "unsupported type", "samplerExternalOES");
}
$$.initialize(EbtSamplerExternalOES, @1);
}
| SAMPLEREXTERNAL2DY2YEXT {
if (!context->checkCanUseExtension(@1, TExtension::EXT_YUV_target))
{
context->error(@1, "unsupported type", "__samplerExternal2DY2YEXT");
}
$$.initialize(EbtSamplerExternal2DY2YEXT, @1);
}
| SAMPLER2DRECT {
if (!context->checkCanUseExtension(@1, TExtension::ARB_texture_rectangle))
{
context->error(@1, "unsupported type", "sampler2DRect");
}
$$.initialize(EbtSampler2DRect, @1);
}
| IMAGE2D {
$$.initialize(EbtImage2D, @1);
}
| IIMAGE2D {
$$.initialize(EbtIImage2D, @1);
}
| UIMAGE2D {
$$.initialize(EbtUImage2D, @1);
}
| IMAGE3D {
$$.initialize(EbtImage3D, @1);
}
| IIMAGE3D {
$$.initialize(EbtIImage3D, @1);
}
| UIMAGE3D {
$$.initialize(EbtUImage3D, @1);
}
| IMAGE2DARRAY {
$$.initialize(EbtImage2DArray, @1);
}
| IIMAGE2DARRAY {
$$.initialize(EbtIImage2DArray, @1);
}
| UIMAGE2DARRAY {
$$.initialize(EbtUImage2DArray, @1);
}
| IMAGECUBE {
$$.initialize(EbtImageCube, @1);
}
| IIMAGECUBE {
$$.initialize(EbtIImageCube, @1);
}
| UIMAGECUBE {
$$.initialize(EbtUImageCube, @1);
}
| ATOMICUINT {
$$.initialize(EbtAtomicCounter, @1);
}
| struct_specifier {
$$ = $1;
}
| TYPE_NAME {
// This is for user defined type names. The lexical phase looked up the type.
const TStructure *structure = static_cast<const TStructure*>($1.symbol);
$$.initializeStruct(structure, false, @1);
}
;
struct_specifier
: STRUCT identifier LEFT_BRACE { context->enterStructDeclaration(@2, ImmutableString($2.string)); } struct_declaration_list RIGHT_BRACE {
$$ = context->addStructure(@1, @2, ImmutableString($2.string), $5);
}
| STRUCT LEFT_BRACE { context->enterStructDeclaration(@2, kEmptyImmutableString); } struct_declaration_list RIGHT_BRACE {
$$ = context->addStructure(@1, @$, kEmptyImmutableString, $4);
}
;
struct_declaration_list
: struct_declaration {
$$ = context->addStructFieldList($1, @1);
}
| struct_declaration_list struct_declaration {
$$ = context->combineStructFieldLists($1, $2, @2);
}
;
struct_declaration
: type_specifier struct_declarator_list SEMICOLON {
$$ = context->addStructDeclaratorList($1, $2);
}
| type_qualifier type_specifier struct_declarator_list SEMICOLON {
// ES3 Only, but errors should be handled elsewhere
$$ = context->addStructDeclaratorListWithQualifiers(*$1, &$2, $3);
}
;
struct_declarator_list
: struct_declarator {
$$ = new TDeclaratorList();
$$->push_back($1);
}
| struct_declarator_list COMMA struct_declarator {
$$->push_back($3);
}
;
struct_declarator
: identifier {
$$ = context->parseStructDeclarator(ImmutableString($1.string), @1);
}
| identifier array_specifier {
$$ = context->parseStructArrayDeclarator(ImmutableString($1.string), @1, $2);
}
;
initializer
: assignment_expression { $$ = $1; }
;
declaration_statement
: declaration { $$ = $1; }
;
statement
: compound_statement_with_scope { $$ = $1; }
| simple_statement { $$ = $1; }
;
// Grammar Note: Labeled statements for SWITCH only; 'goto' is not supported.
simple_statement
: declaration_statement { $$ = $1; }
| expression_statement { $$ = $1; }
| selection_statement { $$ = $1; }
| switch_statement { $$ = $1; }
| case_label { $$ = $1; }
| iteration_statement { $$ = $1; }
| jump_statement { $$ = $1; }
;
compound_statement_with_scope
: LEFT_BRACE RIGHT_BRACE {
$$ = new TIntermBlock();
$$->setLine(@$);
}
| LEFT_BRACE { context->symbolTable.push(); } statement_list { context->symbolTable.pop(); } RIGHT_BRACE {
$3->setLine(@$);
$$ = $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 iteration_statement, function definition (scope is created for parameters)
: LEFT_BRACE RIGHT_BRACE {
$$ = new TIntermBlock();
$$->setLine(@$);
}
| LEFT_BRACE statement_list RIGHT_BRACE {
$2->setLine(@$);
$$ = $2;
}
;
statement_list
: statement {
$$ = new TIntermBlock();
context->appendStatement($$, $1);
}
| statement_list statement {
$$ = $1;
context->appendStatement($$, $2);
}
;
expression_statement
: SEMICOLON { $$ = context->addEmptyStatement(@$); }
| expression SEMICOLON { $$ = $1; }
;
selection_statement
: IF LEFT_PAREN expression RIGHT_PAREN selection_rest_statement {
$$ = context->addIfElse($3, $5, @1);
}
;
selection_rest_statement
: statement_with_scope ELSE statement_with_scope {
$$.node1 = $1;
$$.node2 = $3;
}
| statement_with_scope {
$$.node1 = $1;
$$.node2 = nullptr;
}
;
// Note that we've diverged from the spec grammar here a bit for the sake of simplicity.
// We're reusing compound_statement_with_scope instead of having separate rules for switch.
switch_statement
: SWITCH LEFT_PAREN expression RIGHT_PAREN { context->incrSwitchNestingLevel(); } compound_statement_with_scope {
$$ = context->addSwitch($3, $6, @1);
context->decrSwitchNestingLevel();
}
;
case_label
: CASE constant_expression COLON {
$$ = context->addCase($2, @1);
}
| DEFAULT COLON {
$$ = context->addDefault(@1);
}
;
condition
: expression {
$$ = $1;
context->checkIsScalarBool($1->getLine(), $1);
}
| fully_specified_type identifier EQUAL initializer {
$$ = context->addConditionInitializer($1, ImmutableString($2.string), $4, @2);
}
;
iteration_statement
: WHILE LEFT_PAREN { context->symbolTable.push(); context->incrLoopNestingLevel(); } condition RIGHT_PAREN statement_no_new_scope {
context->symbolTable.pop();
$$ = context->addLoop(ELoopWhile, 0, $4, 0, $6, @1);
context->decrLoopNestingLevel();
}
| DO { context->incrLoopNestingLevel(); } statement_with_scope WHILE LEFT_PAREN expression RIGHT_PAREN SEMICOLON {
$$ = context->addLoop(ELoopDoWhile, 0, $6, 0, $3, @4);
context->decrLoopNestingLevel();
}
| FOR LEFT_PAREN { context->symbolTable.push(); context->incrLoopNestingLevel(); } for_init_statement for_rest_statement RIGHT_PAREN statement_no_new_scope {
context->symbolTable.pop();
$$ = context->addLoop(ELoopFor, $4, $5.node1, reinterpret_cast<TIntermTyped*>($5.node2), $7, @1);
context->decrLoopNestingLevel();
}
;
for_init_statement
: expression_statement {
$$ = $1;
}
| declaration_statement {
$$ = $1;
}
;
conditionopt
: condition {
$$ = $1;
}
| /* May be null */ {
$$ = nullptr;
}
;
for_rest_statement
: conditionopt SEMICOLON {
$$.node1 = $1;
$$.node2 = 0;
}
| conditionopt SEMICOLON expression {
$$.node1 = $1;
$$.node2 = $3;
}
;
jump_statement
: CONTINUE SEMICOLON {
$$ = context->addBranch(EOpContinue, @1);
}
| BREAK SEMICOLON {
$$ = context->addBranch(EOpBreak, @1);
}
| RETURN SEMICOLON {
$$ = context->addBranch(EOpReturn, @1);
}
| RETURN expression SEMICOLON {
$$ = context->addBranch(EOpReturn, $2, @1);
}
| DISCARD SEMICOLON {
$$ = context->addBranch(EOpKill, @1);
}
;
// Grammar Note: No 'goto'. Gotos are not supported.
translation_unit
: external_declaration {
$$ = new TIntermBlock();
$$->setLine(@$);
$$->appendStatement($1);
context->setTreeRoot($$);
}
| translation_unit external_declaration {
$$->appendStatement($2);
}
;
external_declaration
: function_definition {
$$ = $1;
}
| declaration {
$$ = $1;
}
;
function_definition
: function_prototype {
context->parseFunctionDefinitionHeader(@1, $1.function, &($1.intermFunctionPrototype));
}
compound_statement_no_new_scope {
$$ = context->addFunctionDefinition($1.intermFunctionPrototype, $3, @1);
}
;
%%
int glslang_parse(TParseContext* context) {
return yyparse(context, context->getScanner());
}