glslang/MachineIndependent/glslang.y - third_party/glslang - Git at Google

 //
 // Copyright (C) 2002-2005  3Dlabs Inc. Ltd.
 // Copyright (C) 2012-2013 LunarG, Inc.
 // Copyright (C) 2017 ARM Limited.
 //
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions
 // are met:
 //
 //    Redistributions of source code must retain the above copyright
 //    notice, this list of conditions and the following disclaimer.
 //
 //    Redistributions in binary form must reproduce the above
 //    copyright notice, this list of conditions and the following
 //    disclaimer in the documentation and/or other materials provided
 //    with the distribution.
 //
 //    Neither the name of 3Dlabs Inc. Ltd. nor the names of its
 //    contributors may be used to endorse or promote products derived
 //    from this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 // FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 // COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 // BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 // LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 // ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 // POSSIBILITY OF SUCH DAMAGE.
 //

 /**
  * This is bison grammar and productions for parsing all versions of the
  * GLSL shading languages.
  */
 %{

 /* Based on:
 ANSI C Yacc grammar

 In 1985, Jeff Lee published his Yacc grammar (which is accompanied by a
 matching Lex specification) for the April 30, 1985 draft version of the
 ANSI C standard.  Tom Stockfisch reposted it to net.sources in 1987; that
 original, as mentioned in the answer to question 17.25 of the comp.lang.c
 FAQ, can be ftp'ed from ftp.uu.net, file usenet/net.sources/ansi.c.grammar.Z.

 I intend to keep this version as close to the current C Standard grammar as
 possible; please let me know if you discover discrepancies.

 Jutta Degener, 1995
 */

 #include "SymbolTable.h"
 #include "ParseHelper.h"
 #include "../Public/ShaderLang.h"

 using namespace glslang;

 %}

 %define parse.error verbose

 %union {
     struct {
         glslang::TSourceLoc loc;
         union {
             glslang::TString *string;
             int i;
             unsigned int u;
             long long i64;
             unsigned long long u64;
             bool b;
             double d;
         };
         glslang::TSymbol* symbol;
     } lex;
     struct {
         glslang::TSourceLoc loc;
         glslang::TOperator op;
         union {
             TIntermNode* intermNode;
             glslang::TIntermNodePair nodePair;
             glslang::TIntermTyped* intermTypedNode;
         };
         union {
             glslang::TPublicType type;
             glslang::TFunction* function;
             glslang::TParameter param;
             glslang::TTypeLoc typeLine;
             glslang::TTypeList* typeList;
             glslang::TArraySizes* arraySizes;
             glslang::TIdentifierList* identifierList;
         };
     } interm;
 }

 %{

 /* windows only pragma */
 #ifdef _MSC_VER
     #pragma warning(disable : 4065)
     #pragma warning(disable : 4127)
     #pragma warning(disable : 4244)
 #endif

 #define parseContext (*pParseContext)
 #define yyerror(context, msg) context->parserError(msg)

 extern int yylex(YYSTYPE*, TParseContext&);

 %}

 %parse-param {glslang::TParseContext* pParseContext}
 %lex-param {parseContext}
 %pure-parser  // enable thread safety
 %expect 1     // One shift reduce conflict because of if | else

 %token <lex> ATTRIBUTE VARYING
 %token <lex> FLOAT16_T FLOAT FLOAT32_T DOUBLE FLOAT64_T
 %token <lex> CONST BOOL INT UINT INT64_T UINT64_T INT32_T UINT32_T INT16_T UINT16_T INT8_T UINT8_T
 %token <lex> BREAK CONTINUE DO ELSE FOR IF DISCARD RETURN SWITCH CASE DEFAULT SUBROUTINE
 %token <lex> BVEC2 BVEC3 BVEC4
 %token <lex> IVEC2 IVEC3 IVEC4
 %token <lex> UVEC2 UVEC3 UVEC4
 %token <lex> I64VEC2 I64VEC3 I64VEC4
 %token <lex> U64VEC2 U64VEC3 U64VEC4
 %token <lex> I32VEC2 I32VEC3 I32VEC4
 %token <lex> U32VEC2 U32VEC3 U32VEC4
 %token <lex> I16VEC2 I16VEC3 I16VEC4
 %token <lex> U16VEC2 U16VEC3 U16VEC4
 %token <lex> I8VEC2  I8VEC3  I8VEC4
 %token <lex> U8VEC2  U8VEC3  U8VEC4
 %token <lex> VEC2 VEC3 VEC4
 %token <lex> MAT2 MAT3 MAT4 CENTROID IN OUT INOUT
 %token <lex> UNIFORM PATCH SAMPLE BUFFER SHARED
 %token <lex> COHERENT VOLATILE RESTRICT READONLY WRITEONLY
 %token <lex> DVEC2 DVEC3 DVEC4 DMAT2 DMAT3 DMAT4
 %token <lex> F16VEC2 F16VEC3 F16VEC4 F16MAT2 F16MAT3 F16MAT4
 %token <lex> F32VEC2 F32VEC3 F32VEC4 F32MAT2 F32MAT3 F32MAT4
 %token <lex> F64VEC2 F64VEC3 F64VEC4 F64MAT2 F64MAT3 F64MAT4
 %token <lex> NOPERSPECTIVE FLAT SMOOTH LAYOUT __EXPLICITINTERPAMD

 %token <lex> MAT2X2 MAT2X3 MAT2X4
 %token <lex> MAT3X2 MAT3X3 MAT3X4
 %token <lex> MAT4X2 MAT4X3 MAT4X4
 %token <lex> DMAT2X2 DMAT2X3 DMAT2X4
 %token <lex> DMAT3X2 DMAT3X3 DMAT3X4
 %token <lex> DMAT4X2 DMAT4X3 DMAT4X4
 %token <lex> F16MAT2X2 F16MAT2X3 F16MAT2X4
 %token <lex> F16MAT3X2 F16MAT3X3 F16MAT3X4
 %token <lex> F16MAT4X2 F16MAT4X3 F16MAT4X4
 %token <lex> F32MAT2X2 F32MAT2X3 F32MAT2X4
 %token <lex> F32MAT3X2 F32MAT3X3 F32MAT3X4
 %token <lex> F32MAT4X2 F32MAT4X3 F32MAT4X4
 %token <lex> F64MAT2X2 F64MAT2X3 F64MAT2X4
 %token <lex> F64MAT3X2 F64MAT3X3 F64MAT3X4
 %token <lex> F64MAT4X2 F64MAT4X3 F64MAT4X4
 %token <lex> ATOMIC_UINT

 // combined image/sampler
 %token <lex> SAMPLER1D SAMPLER2D SAMPLER3D SAMPLERCUBE SAMPLER1DSHADOW SAMPLER2DSHADOW
 %token <lex> SAMPLERCUBESHADOW SAMPLER1DARRAY SAMPLER2DARRAY SAMPLER1DARRAYSHADOW
 %token <lex> SAMPLER2DARRAYSHADOW ISAMPLER1D ISAMPLER2D ISAMPLER3D ISAMPLERCUBE
 %token <lex> ISAMPLER1DARRAY ISAMPLER2DARRAY USAMPLER1D USAMPLER2D USAMPLER3D
 %token <lex> USAMPLERCUBE USAMPLER1DARRAY USAMPLER2DARRAY
 %token <lex> SAMPLER2DRECT SAMPLER2DRECTSHADOW ISAMPLER2DRECT USAMPLER2DRECT
 %token <lex> SAMPLERBUFFER ISAMPLERBUFFER USAMPLERBUFFER
 %token <lex> SAMPLERCUBEARRAY SAMPLERCUBEARRAYSHADOW
 %token <lex> ISAMPLERCUBEARRAY USAMPLERCUBEARRAY
 %token <lex> SAMPLER2DMS ISAMPLER2DMS USAMPLER2DMS
 %token <lex> SAMPLER2DMSARRAY ISAMPLER2DMSARRAY USAMPLER2DMSARRAY
 %token <lex> SAMPLEREXTERNALOES

 // pure sampler
 %token <lex> SAMPLER SAMPLERSHADOW

 // texture without sampler
 %token <lex> TEXTURE1D TEXTURE2D TEXTURE3D TEXTURECUBE
 %token <lex> TEXTURE1DARRAY TEXTURE2DARRAY
 %token <lex> ITEXTURE1D ITEXTURE2D ITEXTURE3D ITEXTURECUBE
 %token <lex> ITEXTURE1DARRAY ITEXTURE2DARRAY UTEXTURE1D UTEXTURE2D UTEXTURE3D
 %token <lex> UTEXTURECUBE UTEXTURE1DARRAY UTEXTURE2DARRAY
 %token <lex> TEXTURE2DRECT ITEXTURE2DRECT UTEXTURE2DRECT
 %token <lex> TEXTUREBUFFER ITEXTUREBUFFER UTEXTUREBUFFER
 %token <lex> TEXTURECUBEARRAY ITEXTURECUBEARRAY UTEXTURECUBEARRAY
 %token <lex> TEXTURE2DMS ITEXTURE2DMS UTEXTURE2DMS
 %token <lex> TEXTURE2DMSARRAY ITEXTURE2DMSARRAY UTEXTURE2DMSARRAY

 // input attachments
 %token <lex> SUBPASSINPUT SUBPASSINPUTMS ISUBPASSINPUT ISUBPASSINPUTMS USUBPASSINPUT USUBPASSINPUTMS

 %token <lex> IMAGE1D IIMAGE1D UIMAGE1D IMAGE2D IIMAGE2D
 %token <lex> UIMAGE2D IMAGE3D IIMAGE3D UIMAGE3D
 %token <lex> IMAGE2DRECT IIMAGE2DRECT UIMAGE2DRECT
 %token <lex> IMAGECUBE IIMAGECUBE UIMAGECUBE
 %token <lex> IMAGEBUFFER IIMAGEBUFFER UIMAGEBUFFER
 %token <lex> IMAGE1DARRAY IIMAGE1DARRAY UIMAGE1DARRAY
 %token <lex> IMAGE2DARRAY IIMAGE2DARRAY UIMAGE2DARRAY
 %token <lex> IMAGECUBEARRAY IIMAGECUBEARRAY UIMAGECUBEARRAY
 %token <lex> IMAGE2DMS IIMAGE2DMS UIMAGE2DMS
 %token <lex> IMAGE2DMSARRAY IIMAGE2DMSARRAY UIMAGE2DMSARRAY

 %token <lex> STRUCT VOID WHILE

 %token <lex> IDENTIFIER TYPE_NAME
 %token <lex> FLOATCONSTANT DOUBLECONSTANT INT16CONSTANT UINT16CONSTANT INT32CONSTANT UINT32CONSTANT INTCONSTANT UINTCONSTANT INT64CONSTANT UINT64CONSTANT BOOLCONSTANT FLOAT16CONSTANT
 %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

 %token <lex> INVARIANT PRECISE
 %token <lex> HIGH_PRECISION MEDIUM_PRECISION LOW_PRECISION PRECISION

 %token <lex> PACKED RESOURCE SUPERP

 %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 initializer_list condition conditionopt

 %type <interm.intermNode> translation_unit function_definition
 %type <interm.intermNode> statement simple_statement
 %type <interm.intermNode> statement_list switch_statement_list compound_statement
 %type <interm.intermNode> declaration_statement selection_statement expression_statement
 %type <interm.intermNode> switch_statement case_label
 %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_scoped
 %type <interm> single_declaration init_declarator_list

 %type <interm> parameter_declaration parameter_declarator parameter_type_specifier

 %type <interm> array_specifier
 %type <interm.type> precise_qualifier invariant_qualifier interpolation_qualifier storage_qualifier precision_qualifier
 %type <interm.type> layout_qualifier layout_qualifier_id_list layout_qualifier_id

 %type <interm.type> type_qualifier fully_specified_type type_specifier
 %type <interm.type> single_type_qualifier
 %type <interm.type> type_specifier_nonarray
 %type <interm.type> struct_specifier
 %type <interm.typeLine> struct_declarator
 %type <interm.typeList> struct_declarator_list struct_declaration struct_declaration_list type_name_list
 %type <interm> block_structure
 %type <interm.function> function_header function_declarator
 %type <interm.function> function_header_with_parameters
 %type <interm> function_call_header_with_parameters function_call_header_no_parameters function_call_generic function_prototype
 %type <interm> function_call_or_method function_identifier function_call_header

 %type <interm.identifierList> identifier_list

 %start translation_unit
 %%

 variable_identifier
     : IDENTIFIER {
         $$ = parseContext.handleVariable($1.loc, $1.symbol, $1.string);
     }
     ;

 primary_expression
     : variable_identifier {
         $$ = $1;
     }
     | INT32CONSTANT {
         parseContext.explicitInt32Check($1.loc, "32-bit signed literal");
         $$ = parseContext.intermediate.addConstantUnion($1.i, $1.loc, true);
     }
     | UINT32CONSTANT {
         parseContext.explicitInt32Check($1.loc, "32-bit signed literal");
         $$ = parseContext.intermediate.addConstantUnion($1.u, $1.loc, true);
     }
     | INTCONSTANT {
         $$ = parseContext.intermediate.addConstantUnion($1.i, $1.loc, true);
     }
     | UINTCONSTANT {
         parseContext.fullIntegerCheck($1.loc, "unsigned literal");
         $$ = parseContext.intermediate.addConstantUnion($1.u, $1.loc, true);
     }
     | INT64CONSTANT {
         parseContext.int64Check($1.loc, "64-bit integer literal");
         $$ = parseContext.intermediate.addConstantUnion($1.i64, $1.loc, true);
     }
     | UINT64CONSTANT {
         parseContext.int64Check($1.loc, "64-bit unsigned integer literal");
         $$ = parseContext.intermediate.addConstantUnion($1.u64, $1.loc, true);
     }
     | INT16CONSTANT {
         parseContext.explicitInt16Check($1.loc, "16-bit integer literal");
         $$ = parseContext.intermediate.addConstantUnion((short)$1.i, $1.loc, true);
     }
     | UINT16CONSTANT {
         parseContext.explicitInt16Check($1.loc, "16-bit unsigned integer literal");
         $$ = parseContext.intermediate.addConstantUnion((unsigned short)$1.u, $1.loc, true);
     }
     | FLOATCONSTANT {
         $$ = parseContext.intermediate.addConstantUnion($1.d, EbtFloat, $1.loc, true);
     }
     | DOUBLECONSTANT {
         parseContext.doubleCheck($1.loc, "double literal");
         $$ = parseContext.intermediate.addConstantUnion($1.d, EbtDouble, $1.loc, true);
     }
     | FLOAT16CONSTANT {
         parseContext.float16Check($1.loc, "half float literal");
         $$ = parseContext.intermediate.addConstantUnion($1.d, EbtFloat16, $1.loc, true);
     }
     | BOOLCONSTANT {
         $$ = parseContext.intermediate.addConstantUnion($1.b, $1.loc, true);
     }
     | LEFT_PAREN expression RIGHT_PAREN {
         $$ = $2;
         if ($$->getAsConstantUnion())
             $$->getAsConstantUnion()->setExpression();
     }
     ;

 postfix_expression
     : primary_expression {
         $$ = $1;
     }
     | postfix_expression LEFT_BRACKET integer_expression RIGHT_BRACKET {
         $$ = parseContext.handleBracketDereference($2.loc, $1, $3);
     }
     | function_call {
         $$ = $1;
     }
     | postfix_expression DOT IDENTIFIER {
         $$ = parseContext.handleDotDereference($3.loc, $1, *$3.string);
     }
     | postfix_expression INC_OP {
         parseContext.variableCheck($1);
         parseContext.lValueErrorCheck($2.loc, "++", $1);
         $$ = parseContext.handleUnaryMath($2.loc, "++", EOpPostIncrement, $1);
     }
     | postfix_expression DEC_OP {
         parseContext.variableCheck($1);
         parseContext.lValueErrorCheck($2.loc, "--", $1);
         $$ = parseContext.handleUnaryMath($2.loc, "--", EOpPostDecrement, $1);
     }
     ;

 integer_expression
     : expression {
         parseContext.integerCheck($1, "[]");
         $$ = $1;
     }
     ;

 function_call
     : function_call_or_method {
         $$ = parseContext.handleFunctionCall($1.loc, $1.function, $1.intermNode);
         delete $1.function;
     }
     ;

 function_call_or_method
     : function_call_generic {
         $$ = $1;
     }
     ;

 function_call_generic
     : function_call_header_with_parameters RIGHT_PAREN {
         $$ = $1;
         $$.loc = $2.loc;
     }
     | function_call_header_no_parameters RIGHT_PAREN {
         $$ = $1;
         $$.loc = $2.loc;
     }
     ;

 function_call_header_no_parameters
     : function_call_header VOID {
         $$ = $1;
     }
     | function_call_header {
         $$ = $1;
     }
     ;

 function_call_header_with_parameters
     : function_call_header assignment_expression {
         TParameter param = { 0, new TType };
         param.type->shallowCopy($2->getType());
         $1.function->addParameter(param);
         $$.function = $1.function;
         $$.intermNode = $2;
     }
     | function_call_header_with_parameters COMMA assignment_expression {
         TParameter param = { 0, new TType };
         param.type->shallowCopy($3->getType());
         $1.function->addParameter(param);
         $$.function = $1.function;
         $$.intermNode = parseContext.intermediate.growAggregate($1.intermNode, $3, $2.loc);
     }
     ;

 function_call_header
     : function_identifier LEFT_PAREN {
         $$ = $1;
     }
     ;

 // Grammar Note:  Constructors look like functions, but are recognized as types.

 function_identifier
     : type_specifier {
         // Constructor
         $$.intermNode = 0;
         $$.function = parseContext.handleConstructorCall($1.loc, $1);
     }
     | postfix_expression {
         //
         // Should be a method or subroutine call, but we haven't recognized the arguments yet.
         //
         $$.function = 0;
         $$.intermNode = 0;

         TIntermMethod* method = $1->getAsMethodNode();
         if (method) {
             $$.function = new TFunction(&method->getMethodName(), TType(EbtInt), EOpArrayLength);
             $$.intermNode = method->getObject();
         } else {
             TIntermSymbol* symbol = $1->getAsSymbolNode();
             if (symbol) {
                 parseContext.reservedErrorCheck(symbol->getLoc(), symbol->getName());
                 TFunction *function = new TFunction(&symbol->getName(), TType(EbtVoid));
                 $$.function = function;
             } else
                 parseContext.error($1->getLoc(), "function call, method, or subroutine call expected", "", "");
         }

         if ($$.function == 0) {
             // error recover
             TString empty("");
             $$.function = new TFunction(&empty, TType(EbtVoid), EOpNull);
         }
     }
     ;

 unary_expression
     : postfix_expression {
         parseContext.variableCheck($1);
         $$ = $1;
         if (TIntermMethod* method = $1->getAsMethodNode())
             parseContext.error($1->getLoc(), "incomplete method syntax", method->getMethodName().c_str(), "");
     }
     | INC_OP unary_expression {
         parseContext.lValueErrorCheck($1.loc, "++", $2);
         $$ = parseContext.handleUnaryMath($1.loc, "++", EOpPreIncrement, $2);
     }
     | DEC_OP unary_expression {
         parseContext.lValueErrorCheck($1.loc, "--", $2);
         $$ = parseContext.handleUnaryMath($1.loc, "--", EOpPreDecrement, $2);
     }
     | unary_operator unary_expression {
         if ($1.op != EOpNull) {
             char errorOp[2] = {0, 0};
             switch($1.op) {
             case EOpNegative:   errorOp[0] = '-'; break;
             case EOpLogicalNot: errorOp[0] = '!'; break;
             case EOpBitwiseNot: errorOp[0] = '~'; break;
             default: break; // some compilers want this
             }
             $$ = parseContext.handleUnaryMath($1.loc, errorOp, $1.op, $2);
         } else {
             $$ = $2;
             if ($$->getAsConstantUnion())
                 $$->getAsConstantUnion()->setExpression();
         }
     }
     ;
 // Grammar Note:  No traditional style type casts.

 unary_operator
     : PLUS  { $$.loc = $1.loc; $$.op = EOpNull; }
     | DASH  { $$.loc = $1.loc; $$.op = EOpNegative; }
     | BANG  { $$.loc = $1.loc; $$.op = EOpLogicalNot; }
     | TILDE { $$.loc = $1.loc; $$.op = EOpBitwiseNot;
               parseContext.fullIntegerCheck($1.loc, "bitwise not"); }
     ;
 // Grammar Note:  No '*' or '&' unary ops.  Pointers are not supported.

 multiplicative_expression
     : unary_expression { $$ = $1; }
     | multiplicative_expression STAR unary_expression {
         $$ = parseContext.handleBinaryMath($2.loc, "*", EOpMul, $1, $3);
         if ($$ == 0)
             $$ = $1;
     }
     | multiplicative_expression SLASH unary_expression {
         $$ = parseContext.handleBinaryMath($2.loc, "/", EOpDiv, $1, $3);
         if ($$ == 0)
             $$ = $1;
     }
     | multiplicative_expression PERCENT unary_expression {
         parseContext.fullIntegerCheck($2.loc, "%");
         $$ = parseContext.handleBinaryMath($2.loc, "%", EOpMod, $1, $3);
         if ($$ == 0)
             $$ = $1;
     }
     ;

 additive_expression
     : multiplicative_expression { $$ = $1; }
     | additive_expression PLUS multiplicative_expression {
         $$ = parseContext.handleBinaryMath($2.loc, "+", EOpAdd, $1, $3);
         if ($$ == 0)
             $$ = $1;
     }
     | additive_expression DASH multiplicative_expression {
         $$ = parseContext.handleBinaryMath($2.loc, "-", EOpSub, $1, $3);
         if ($$ == 0)
             $$ = $1;
     }
     ;

 shift_expression
     : additive_expression { $$ = $1; }
     | shift_expression LEFT_OP additive_expression {
         parseContext.fullIntegerCheck($2.loc, "bit shift left");
         $$ = parseContext.handleBinaryMath($2.loc, "<<", EOpLeftShift, $1, $3);
         if ($$ == 0)
             $$ = $1;
     }
     | shift_expression RIGHT_OP additive_expression {
         parseContext.fullIntegerCheck($2.loc, "bit shift right");
         $$ = parseContext.handleBinaryMath($2.loc, ">>", EOpRightShift, $1, $3);
         if ($$ == 0)
             $$ = $1;
     }
     ;

 relational_expression
     : shift_expression { $$ = $1; }
     | relational_expression LEFT_ANGLE shift_expression {
         $$ = parseContext.handleBinaryMath($2.loc, "<", EOpLessThan, $1, $3);
         if ($$ == 0)
             $$ = parseContext.intermediate.addConstantUnion(false, $2.loc);
     }
     | relational_expression RIGHT_ANGLE shift_expression  {
         $$ = parseContext.handleBinaryMath($2.loc, ">", EOpGreaterThan, $1, $3);
         if ($$ == 0)
             $$ = parseContext.intermediate.addConstantUnion(false, $2.loc);
     }
     | relational_expression LE_OP shift_expression  {
         $$ = parseContext.handleBinaryMath($2.loc, "<=", EOpLessThanEqual, $1, $3);
         if ($$ == 0)
             $$ = parseContext.intermediate.addConstantUnion(false, $2.loc);
     }
     | relational_expression GE_OP shift_expression  {
         $$ = parseContext.handleBinaryMath($2.loc, ">=", EOpGreaterThanEqual, $1, $3);
         if ($$ == 0)
             $$ = parseContext.intermediate.addConstantUnion(false, $2.loc);
     }
     ;

 equality_expression
     : relational_expression { $$ = $1; }
     | equality_expression EQ_OP relational_expression  {
         parseContext.arrayObjectCheck($2.loc, $1->getType(), "array comparison");
         parseContext.opaqueCheck($2.loc, $1->getType(), "==");
         parseContext.specializationCheck($2.loc, $1->getType(), "==");
         $$ = parseContext.handleBinaryMath($2.loc, "==", EOpEqual, $1, $3);
         if ($$ == 0)
             $$ = parseContext.intermediate.addConstantUnion(false, $2.loc);
     }
     | equality_expression NE_OP relational_expression {
         parseContext.arrayObjectCheck($2.loc, $1->getType(), "array comparison");
         parseContext.opaqueCheck($2.loc, $1->getType(), "!=");
         parseContext.specializationCheck($2.loc, $1->getType(), "!=");
         $$ = parseContext.handleBinaryMath($2.loc, "!=", EOpNotEqual, $1, $3);
         if ($$ == 0)
             $$ = parseContext.intermediate.addConstantUnion(false, $2.loc);
     }
     ;

 and_expression
     : equality_expression { $$ = $1; }
     | and_expression AMPERSAND equality_expression {
         parseContext.fullIntegerCheck($2.loc, "bitwise and");
         $$ = parseContext.handleBinaryMath($2.loc, "&", EOpAnd, $1, $3);
         if ($$ == 0)
             $$ = $1;
     }
     ;

 exclusive_or_expression
     : and_expression { $$ = $1; }
     | exclusive_or_expression CARET and_expression {
         parseContext.fullIntegerCheck($2.loc, "bitwise exclusive or");
         $$ = parseContext.handleBinaryMath($2.loc, "^", EOpExclusiveOr, $1, $3);
         if ($$ == 0)
             $$ = $1;
     }
     ;

 inclusive_or_expression
     : exclusive_or_expression { $$ = $1; }
     | inclusive_or_expression VERTICAL_BAR exclusive_or_expression {
         parseContext.fullIntegerCheck($2.loc, "bitwise inclusive or");
         $$ = parseContext.handleBinaryMath($2.loc, "|", EOpInclusiveOr, $1, $3);
         if ($$ == 0)
             $$ = $1;
     }
     ;

 logical_and_expression
     : inclusive_or_expression { $$ = $1; }
     | logical_and_expression AND_OP inclusive_or_expression {
         $$ = parseContext.handleBinaryMath($2.loc, "&&", EOpLogicalAnd, $1, $3);
         if ($$ == 0)
             $$ = parseContext.intermediate.addConstantUnion(false, $2.loc);
     }
     ;

 logical_xor_expression
     : logical_and_expression { $$ = $1; }
     | logical_xor_expression XOR_OP logical_and_expression  {
         $$ = parseContext.handleBinaryMath($2.loc, "^^", EOpLogicalXor, $1, $3);
         if ($$ == 0)
             $$ = parseContext.intermediate.addConstantUnion(false, $2.loc);
     }
     ;

 logical_or_expression
     : logical_xor_expression { $$ = $1; }
     | logical_or_expression OR_OP logical_xor_expression  {
         $$ = parseContext.handleBinaryMath($2.loc, "||", EOpLogicalOr, $1, $3);
         if ($$ == 0)
             $$ = parseContext.intermediate.addConstantUnion(false, $2.loc);
     }
     ;

 conditional_expression
     : logical_or_expression { $$ = $1; }
     | logical_or_expression QUESTION {
         ++parseContext.controlFlowNestingLevel;
     }
       expression COLON assignment_expression {
         --parseContext.controlFlowNestingLevel;
         parseContext.boolCheck($2.loc, $1);
         parseContext.rValueErrorCheck($2.loc, "?", $1);
         parseContext.rValueErrorCheck($5.loc, ":", $4);
         parseContext.rValueErrorCheck($5.loc, ":", $6);
         $$ = parseContext.intermediate.addSelection($1, $4, $6, $2.loc);
         if ($$ == 0) {
             parseContext.binaryOpError($2.loc, ":", $4->getCompleteString(), $6->getCompleteString());
             $$ = $6;
         }
     }
     ;

 assignment_expression
     : conditional_expression { $$ = $1; }
     | unary_expression assignment_operator assignment_expression {
         parseContext.arrayObjectCheck($2.loc, $1->getType(), "array assignment");
         parseContext.opaqueCheck($2.loc, $1->getType(), "=");
         parseContext.specializationCheck($2.loc, $1->getType(), "=");
         parseContext.lValueErrorCheck($2.loc, "assign", $1);
         parseContext.rValueErrorCheck($2.loc, "assign", $3);
         $$ = parseContext.intermediate.addAssign($2.op, $1, $3, $2.loc);
         if ($$ == 0) {
             parseContext.assignError($2.loc, "assign", $1->getCompleteString(), $3->getCompleteString());
             $$ = $1;
         }
     }
     ;

 assignment_operator
     : EQUAL {
         $$.loc = $1.loc;
         $$.op = EOpAssign;
     }
     | MUL_ASSIGN {
         $$.loc = $1.loc;
         $$.op = EOpMulAssign;
     }
     | DIV_ASSIGN {
         $$.loc = $1.loc;
         $$.op = EOpDivAssign;
     }
     | MOD_ASSIGN {
         parseContext.fullIntegerCheck($1.loc, "%=");
         $$.loc = $1.loc;
         $$.op = EOpModAssign;
     }
     | ADD_ASSIGN {
         $$.loc = $1.loc;
         $$.op = EOpAddAssign;
     }
     | SUB_ASSIGN {
         $$.loc = $1.loc;
         $$.op = EOpSubAssign;
     }
     | LEFT_ASSIGN {
         parseContext.fullIntegerCheck($1.loc, "bit-shift left assign");
         $$.loc = $1.loc; $$.op = EOpLeftShiftAssign;
     }
     | RIGHT_ASSIGN {
         parseContext.fullIntegerCheck($1.loc, "bit-shift right assign");
         $$.loc = $1.loc; $$.op = EOpRightShiftAssign;
     }
     | AND_ASSIGN {
         parseContext.fullIntegerCheck($1.loc, "bitwise-and assign");
         $$.loc = $1.loc; $$.op = EOpAndAssign;
     }
     | XOR_ASSIGN {
         parseContext.fullIntegerCheck($1.loc, "bitwise-xor assign");
         $$.loc = $1.loc; $$.op = EOpExclusiveOrAssign;
     }
     | OR_ASSIGN {
         parseContext.fullIntegerCheck($1.loc, "bitwise-or assign");
         $$.loc = $1.loc; $$.op = EOpInclusiveOrAssign;
     }
     ;

 expression
     : assignment_expression {
         $$ = $1;
     }
     | expression COMMA assignment_expression {
         parseContext.samplerConstructorLocationCheck($2.loc, ",", $3);
         $$ = parseContext.intermediate.addComma($1, $3, $2.loc);
         if ($$ == 0) {
             parseContext.binaryOpError($2.loc, ",", $1->getCompleteString(), $3->getCompleteString());
             $$ = $3;
         }
     }
     ;

 constant_expression
     : conditional_expression {
         parseContext.constantValueCheck($1, "");
         $$ = $1;
     }
     ;

 declaration
     : function_prototype SEMICOLON {
         parseContext.handleFunctionDeclarator($1.loc, *$1.function, true /* prototype */);
         $$ = 0;
         // TODO: 4.0 functionality: subroutines: make the identifier a user type for this signature
     }
     | init_declarator_list SEMICOLON {
         if ($1.intermNode && $1.intermNode->getAsAggregate())
             $1.intermNode->getAsAggregate()->setOperator(EOpSequence);
         $$ = $1.intermNode;
     }
     | PRECISION precision_qualifier type_specifier SEMICOLON {
         parseContext.profileRequires($1.loc, ENoProfile, 130, 0, "precision statement");

         // lazy setting of the previous scope's defaults, has effect only the first time it is called in a particular scope
         parseContext.symbolTable.setPreviousDefaultPrecisions(&parseContext.defaultPrecision[0]);
         parseContext.setDefaultPrecision($1.loc, $3, $2.qualifier.precision);
         $$ = 0;
     }
     | block_structure SEMICOLON {
         parseContext.declareBlock($1.loc, *$1.typeList);
         $$ = 0;
     }
     | block_structure IDENTIFIER SEMICOLON {
         parseContext.declareBlock($1.loc, *$1.typeList, $2.string);
         $$ = 0;
     }
     | block_structure IDENTIFIER array_specifier SEMICOLON {
         parseContext.declareBlock($1.loc, *$1.typeList, $2.string, $3.arraySizes);
         $$ = 0;
     }
     | type_qualifier SEMICOLON {
         parseContext.globalQualifierFixCheck($1.loc, $1.qualifier);
         parseContext.updateStandaloneQualifierDefaults($1.loc, $1);
         $$ = 0;
     }
     | type_qualifier IDENTIFIER SEMICOLON {
         parseContext.checkNoShaderLayouts($1.loc, $1.shaderQualifiers);
         parseContext.addQualifierToExisting($1.loc, $1.qualifier, *$2.string);
         $$ = 0;
     }
     | type_qualifier IDENTIFIER identifier_list SEMICOLON {
         parseContext.checkNoShaderLayouts($1.loc, $1.shaderQualifiers);
         $3->push_back($2.string);
         parseContext.addQualifierToExisting($1.loc, $1.qualifier, *$3);
         $$ = 0;
     }
     ;

 block_structure
     : type_qualifier IDENTIFIER LEFT_BRACE { parseContext.nestedBlockCheck($1.loc); } struct_declaration_list RIGHT_BRACE {
         --parseContext.structNestingLevel;
         parseContext.blockName = $2.string;
         parseContext.globalQualifierFixCheck($1.loc, $1.qualifier);
         parseContext.checkNoShaderLayouts($1.loc, $1.shaderQualifiers);
         parseContext.currentBlockQualifier = $1.qualifier;
         $$.loc = $1.loc;
         $$.typeList = $5;
     }

 identifier_list
     : COMMA IDENTIFIER {
         $$ = new TIdentifierList;
         $$->push_back($2.string);
     }
     | identifier_list COMMA IDENTIFIER {
         $$ = $1;
         $$->push_back($3.string);
     }
     ;

 function_prototype
     : function_declarator RIGHT_PAREN  {
         $$.function = $1;
         $$.loc = $2.loc;
     }
     ;

 function_declarator
     : function_header {
         $$ = $1;
     }
     | function_header_with_parameters {
         $$ = $1;
     }
     ;


 function_header_with_parameters
     : function_header parameter_declaration {
         // Add the parameter
         $$ = $1;
         if ($2.param.type->getBasicType() != EbtVoid)
             $1->addParameter($2.param);
         else
             delete $2.param.type;
     }
     | function_header_with_parameters COMMA parameter_declaration {
         //
         // Only first parameter of one-parameter functions can be void
         // The check for named parameters not being void is done in parameter_declarator
         //
         if ($3.param.type->getBasicType() == EbtVoid) {
             //
             // This parameter > first is void
             //
             parseContext.error($2.loc, "cannot be an argument type except for '(void)'", "void", "");
             delete $3.param.type;
         } else {
             // Add the parameter
             $$ = $1;
             $1->addParameter($3.param);
         }
     }
     ;

 function_header
     : fully_specified_type IDENTIFIER LEFT_PAREN {
         if ($1.qualifier.storage != EvqGlobal && $1.qualifier.storage != EvqTemporary) {
             parseContext.error($2.loc, "no qualifiers allowed for function return",
                                GetStorageQualifierString($1.qualifier.storage), "");
         }
         if ($1.arraySizes)
             parseContext.arraySizeRequiredCheck($1.loc, *$1.arraySizes);

         // Add the function as a prototype after parsing it (we do not support recursion)
         TFunction *function;
         TType type($1);

         // Potentially rename shader entry point function.  No-op most of the time.
         parseContext.renameShaderFunction($2.string);

         // Make the function
         function = new TFunction($2.string, type);
         $$ = function;
     }
     ;

 parameter_declarator
     // Type + name
     : type_specifier IDENTIFIER {
         if ($1.arraySizes) {
             parseContext.profileRequires($1.loc, ENoProfile, 120, E_GL_3DL_array_objects, "arrayed type");
             parseContext.profileRequires($1.loc, EEsProfile, 300, 0, "arrayed type");
             parseContext.arraySizeRequiredCheck($1.loc, *$1.arraySizes);
         }
         if ($1.basicType == EbtVoid) {
             parseContext.error($2.loc, "illegal use of type 'void'", $2.string->c_str(), "");
         }
         parseContext.reservedErrorCheck($2.loc, *$2.string);

         TParameter param = {$2.string, new TType($1)};
         $$.loc = $2.loc;
         $$.param = param;
     }
     | type_specifier IDENTIFIER array_specifier {
         if ($1.arraySizes) {
             parseContext.profileRequires($1.loc, ENoProfile, 120, E_GL_3DL_array_objects, "arrayed type");
             parseContext.profileRequires($1.loc, EEsProfile, 300, 0, "arrayed type");
             parseContext.arraySizeRequiredCheck($1.loc, *$1.arraySizes);
         }
         parseContext.arrayDimCheck($2.loc, $1.arraySizes, $3.arraySizes);

         parseContext.arraySizeRequiredCheck($3.loc, *$3.arraySizes);
         parseContext.reservedErrorCheck($2.loc, *$2.string);

         $1.arraySizes = $3.arraySizes;

         TParameter param = { $2.string, new TType($1)};
         $$.loc = $2.loc;
         $$.param = param;
     }
     ;

 parameter_declaration
     //
     // With name
     //
     : type_qualifier parameter_declarator {
         $$ = $2;
         if ($1.qualifier.precision != EpqNone)
             $$.param.type->getQualifier().precision = $1.qualifier.precision;
         parseContext.precisionQualifierCheck($$.loc, $$.param.type->getBasicType(), $$.param.type->getQualifier());

         parseContext.checkNoShaderLayouts($1.loc, $1.shaderQualifiers);
         parseContext.parameterTypeCheck($2.loc, $1.qualifier.storage, *$$.param.type);
         parseContext.paramCheckFix($1.loc, $1.qualifier, *$$.param.type);

     }
     | parameter_declarator {
         $$ = $1;

         parseContext.parameterTypeCheck($1.loc, EvqIn, *$1.param.type);
         parseContext.paramCheckFix($1.loc, EvqTemporary, *$$.param.type);
         parseContext.precisionQualifierCheck($$.loc, $$.param.type->getBasicType(), $$.param.type->getQualifier());
     }
     //
     // Without name
     //
     | type_qualifier parameter_type_specifier {
         $$ = $2;
         if ($1.qualifier.precision != EpqNone)
             $$.param.type->getQualifier().precision = $1.qualifier.precision;
         parseContext.precisionQualifierCheck($1.loc, $$.param.type->getBasicType(), $$.param.type->getQualifier());

         parseContext.checkNoShaderLayouts($1.loc, $1.shaderQualifiers);
         parseContext.parameterTypeCheck($2.loc, $1.qualifier.storage, *$$.param.type);
         parseContext.paramCheckFix($1.loc, $1.qualifier, *$$.param.type);
     }
     | parameter_type_specifier {
         $$ = $1;

         parseContext.parameterTypeCheck($1.loc, EvqIn, *$1.param.type);
         parseContext.paramCheckFix($1.loc, EvqTemporary, *$$.param.type);
         parseContext.precisionQualifierCheck($$.loc, $$.param.type->getBasicType(), $$.param.type->getQualifier());
     }
     ;

 parameter_type_specifier
     : type_specifier {
         TParameter param = { 0, new TType($1) };
         $$.param = param;
         if ($1.arraySizes)
             parseContext.arraySizeRequiredCheck($1.loc, *$1.arraySizes);
     }
     ;

 init_declarator_list
     : single_declaration {
         $$ = $1;
     }
     | init_declarator_list COMMA IDENTIFIER {
         $$ = $1;
         parseContext.declareVariable($3.loc, *$3.string, $1.type);
     }
     | init_declarator_list COMMA IDENTIFIER array_specifier {
         $$ = $1;
         parseContext.declareVariable($3.loc, *$3.string, $1.type, $4.arraySizes);
     }
     | init_declarator_list COMMA IDENTIFIER array_specifier EQUAL initializer {
         $$.type = $1.type;
         TIntermNode* initNode = parseContext.declareVariable($3.loc, *$3.string, $1.type, $4.arraySizes, $6);
         $$.intermNode = parseContext.intermediate.growAggregate($1.intermNode, initNode, $5.loc);
     }
     | init_declarator_list COMMA IDENTIFIER EQUAL initializer {
         $$.type = $1.type;
         TIntermNode* initNode = parseContext.declareVariable($3.loc, *$3.string, $1.type, 0, $5);
         $$.intermNode = parseContext.intermediate.growAggregate($1.intermNode, initNode, $4.loc);
     }
     ;

 single_declaration
     : fully_specified_type {
         $$.type = $1;
         $$.intermNode = 0;
         parseContext.declareTypeDefaults($$.loc, $$.type);
     }
     | fully_specified_type IDENTIFIER {
         $$.type = $1;
         $$.intermNode = 0;
         parseContext.declareVariable($2.loc, *$2.string, $1);
     }
     | fully_specified_type IDENTIFIER array_specifier {
         $$.type = $1;
         $$.intermNode = 0;
         parseContext.declareVariable($2.loc, *$2.string, $1, $3.arraySizes);
     }
     | fully_specified_type IDENTIFIER array_specifier EQUAL initializer {
         $$.type = $1;
         TIntermNode* initNode = parseContext.declareVariable($2.loc, *$2.string, $1, $3.arraySizes, $5);
         $$.intermNode = parseContext.intermediate.growAggregate(0, initNode, $4.loc);
     }
     | fully_specified_type IDENTIFIER EQUAL initializer {
         $$.type = $1;
         TIntermNode* initNode = parseContext.declareVariable($2.loc, *$2.string, $1, 0, $4);
         $$.intermNode = parseContext.intermediate.growAggregate(0, initNode, $3.loc);
     }

 // Grammar Note:  No 'enum', or 'typedef'.

 fully_specified_type
     : type_specifier {
         $$ = $1;

         parseContext.globalQualifierTypeCheck($1.loc, $1.qualifier, $$);
         if ($1.arraySizes) {
             parseContext.profileRequires($1.loc, ENoProfile, 120, E_GL_3DL_array_objects, "arrayed type");
             parseContext.profileRequires($1.loc, EEsProfile, 300, 0, "arrayed type");
         }

         parseContext.precisionQualifierCheck($$.loc, $$.basicType, $$.qualifier);
     }
     | type_qualifier type_specifier  {
         parseContext.globalQualifierFixCheck($1.loc, $1.qualifier);
         parseContext.globalQualifierTypeCheck($1.loc, $1.qualifier, $2);

         if ($2.arraySizes) {
             parseContext.profileRequires($2.loc, ENoProfile, 120, E_GL_3DL_array_objects, "arrayed type");
             parseContext.profileRequires($2.loc, EEsProfile, 300, 0, "arrayed type");
         }

         if ($2.arraySizes && parseContext.arrayQualifierError($2.loc, $1.qualifier))
             $2.arraySizes = 0;

         parseContext.checkNoShaderLayouts($2.loc, $1.shaderQualifiers);
         $2.shaderQualifiers.merge($1.shaderQualifiers);
         parseContext.mergeQualifiers($2.loc, $2.qualifier, $1.qualifier, true);
         parseContext.precisionQualifierCheck($2.loc, $2.basicType, $2.qualifier);

         $$ = $2;

         if (! $$.qualifier.isInterpolation() &&
             ((parseContext.language == EShLangVertex   && $$.qualifier.storage == EvqVaryingOut) ||
              (parseContext.language == EShLangFragment && $$.qualifier.storage == EvqVaryingIn)))
             $$.qualifier.smooth = true;
     }
     ;

 invariant_qualifier
     : INVARIANT {
         parseContext.globalCheck($1.loc, "invariant");
         parseContext.profileRequires($$.loc, ENoProfile, 120, 0, "invariant");
         $$.init($1.loc);
         $$.qualifier.invariant = true;
     }
     ;

 interpolation_qualifier
     : SMOOTH {
         parseContext.globalCheck($1.loc, "smooth");
         parseContext.profileRequires($1.loc, ENoProfile, 130, 0, "smooth");
         parseContext.profileRequires($1.loc, EEsProfile, 300, 0, "smooth");
         $$.init($1.loc);
         $$.qualifier.smooth = true;
     }
     | FLAT {
         parseContext.globalCheck($1.loc, "flat");
         parseContext.profileRequires($1.loc, ENoProfile, 130, 0, "flat");
         parseContext.profileRequires($1.loc, EEsProfile, 300, 0, "flat");
         $$.init($1.loc);
         $$.qualifier.flat = true;
     }
     | NOPERSPECTIVE {
         parseContext.globalCheck($1.loc, "noperspective");
         parseContext.requireProfile($1.loc, ~EEsProfile, "noperspective");
         parseContext.profileRequires($1.loc, ENoProfile, 130, 0, "noperspective");
         $$.init($1.loc);
         $$.qualifier.nopersp = true;
     }
     | __EXPLICITINTERPAMD {
 #ifdef AMD_EXTENSIONS
         parseContext.globalCheck($1.loc, "__explicitInterpAMD");
         parseContext.profileRequires($1.loc, ECoreProfile, 450, E_GL_AMD_shader_explicit_vertex_parameter, "explicit interpolation");
         parseContext.profileRequires($1.loc, ECompatibilityProfile, 450, E_GL_AMD_shader_explicit_vertex_parameter, "explicit interpolation");
         $$.init($1.loc);
         $$.qualifier.explicitInterp = true;
 #endif
     }
     ;

 layout_qualifier
     : LAYOUT LEFT_PAREN layout_qualifier_id_list RIGHT_PAREN {
         $$ = $3;
     }
     ;

 layout_qualifier_id_list
     : layout_qualifier_id {
         $$ = $1;
     }
     | layout_qualifier_id_list COMMA layout_qualifier_id {
         $$ = $1;
         $$.shaderQualifiers.merge($3.shaderQualifiers);
         parseContext.mergeObjectLayoutQualifiers($$.qualifier, $3.qualifier, false);
     }

 layout_qualifier_id
     : IDENTIFIER {
         $$.init($1.loc);
         parseContext.setLayoutQualifier($1.loc, $$, *$1.string);
     }
     | IDENTIFIER EQUAL constant_expression {
         $$.init($1.loc);
         parseContext.setLayoutQualifier($1.loc, $$, *$1.string, $3);
     }
     | SHARED { // because "shared" is both an identifier and a keyword
         $$.init($1.loc);
         TString strShared("shared");
         parseContext.setLayoutQualifier($1.loc, $$, strShared);
     }
     ;

 precise_qualifier
     : PRECISE {
         parseContext.profileRequires($$.loc, ECoreProfile | ECompatibilityProfile, 400, E_GL_ARB_gpu_shader5, "precise");
         parseContext.profileRequires($1.loc, EEsProfile, 320, Num_AEP_gpu_shader5, AEP_gpu_shader5, "precise");
         $$.init($1.loc);
         $$.qualifier.noContraction = true;
     }
     ;

 type_qualifier
     : single_type_qualifier {
         $$ = $1;
     }
     | type_qualifier single_type_qualifier {
         $$ = $1;
         if ($$.basicType == EbtVoid)
             $$.basicType = $2.basicType;

         $$.shaderQualifiers.merge($2.shaderQualifiers);
         parseContext.mergeQualifiers($$.loc, $$.qualifier, $2.qualifier, false);
     }
     ;

 single_type_qualifier
     : storage_qualifier {
         $$ = $1;
     }
     | layout_qualifier {
         $$ = $1;
     }
     | precision_qualifier {
         parseContext.checkPrecisionQualifier($1.loc, $1.qualifier.precision);
         $$ = $1;
     }
     | interpolation_qualifier {
         // allow inheritance of storage qualifier from block declaration
         $$ = $1;
     }
     | invariant_qualifier {
         // allow inheritance of storage qualifier from block declaration
         $$ = $1;
     }
     | precise_qualifier {
         // allow inheritance of storage qualifier from block declaration
         $$ = $1;
     }
     ;

 storage_qualifier
     : CONST {
         $$.init($1.loc);
         $$.qualifier.storage = EvqConst;  // will later turn into EvqConstReadOnly, if the initializer is not constant
     }
     | ATTRIBUTE {
         parseContext.requireStage($1.loc, EShLangVertex, "attribute");
         parseContext.checkDeprecated($1.loc, ECoreProfile, 130, "attribute");
         parseContext.checkDeprecated($1.loc, ENoProfile, 130, "attribute");
         parseContext.requireNotRemoved($1.loc, ECoreProfile, 420, "attribute");
         parseContext.requireNotRemoved($1.loc, EEsProfile, 300, "attribute");

         parseContext.globalCheck($1.loc, "attribute");

         $$.init($1.loc);
         $$.qualifier.storage = EvqVaryingIn;
     }
     | VARYING {
         parseContext.checkDeprecated($1.loc, ENoProfile, 130, "varying");
         parseContext.checkDeprecated($1.loc, ECoreProfile, 130, "varying");
         parseContext.requireNotRemoved($1.loc, ECoreProfile, 420, "varying");
         parseContext.requireNotRemoved($1.loc, EEsProfile, 300, "varying");

         parseContext.globalCheck($1.loc, "varying");

         $$.init($1.loc);
         if (parseContext.language == EShLangVertex)
             $$.qualifier.storage = EvqVaryingOut;
         else
             $$.qualifier.storage = EvqVaryingIn;
     }
     | INOUT {
         parseContext.globalCheck($1.loc, "inout");
         $$.init($1.loc);
         $$.qualifier.storage = EvqInOut;
     }
     | IN {
         parseContext.globalCheck($1.loc, "in");
         $$.init($1.loc);
         // whether this is a parameter "in" or a pipeline "in" will get sorted out a bit later
         $$.qualifier.storage = EvqIn;
     }
     | OUT {
         parseContext.globalCheck($1.loc, "out");
         $$.init($1.loc);
         // whether this is a parameter "out" or a pipeline "out" will get sorted out a bit later
         $$.qualifier.storage = EvqOut;
     }
     | CENTROID {
         parseContext.profileRequires($1.loc, ENoProfile, 120, 0, "centroid");
         parseContext.profileRequires($1.loc, EEsProfile, 300, 0, "centroid");
         parseContext.globalCheck($1.loc, "centroid");
         $$.init($1.loc);
         $$.qualifier.centroid = true;
     }
     | PATCH {
         parseContext.globalCheck($1.loc, "patch");
         parseContext.requireStage($1.loc, (EShLanguageMask)(EShLangTessControlMask | EShLangTessEvaluationMask), "patch");
         $$.init($1.loc);
         $$.qualifier.patch = true;
     }
     | SAMPLE {
         parseContext.globalCheck($1.loc, "sample");
         $$.init($1.loc);
         $$.qualifier.sample = true;
     }
     | UNIFORM {
         parseContext.globalCheck($1.loc, "uniform");
         $$.init($1.loc);
         $$.qualifier.storage = EvqUniform;
     }
     | BUFFER {
         parseContext.globalCheck($1.loc, "buffer");
         $$.init($1.loc);
         $$.qualifier.storage = EvqBuffer;
     }
     | SHARED {
         parseContext.globalCheck($1.loc, "shared");
         parseContext.profileRequires($1.loc, ECoreProfile | ECompatibilityProfile, 430, E_GL_ARB_compute_shader, "shared");
         parseContext.profileRequires($1.loc, EEsProfile, 310, 0, "shared");
         parseContext.requireStage($1.loc, EShLangCompute, "shared");
         $$.init($1.loc);
         $$.qualifier.storage = EvqShared;
     }
     | COHERENT {
         $$.init($1.loc);
         $$.qualifier.coherent = true;
     }
     | VOLATILE {
         $$.init($1.loc);
         $$.qualifier.volatil = true;
     }
     | RESTRICT {
         $$.init($1.loc);
         $$.qualifier.restrict = true;
     }
     | READONLY {
         $$.init($1.loc);
         $$.qualifier.readonly = true;
     }
     | WRITEONLY {
         $$.init($1.loc);
         $$.qualifier.writeonly = true;
     }
     | SUBROUTINE {
         parseContext.spvRemoved($1.loc, "subroutine");
         parseContext.globalCheck($1.loc, "subroutine");
         parseContext.unimplemented($1.loc, "subroutine");
         $$.init($1.loc);
     }
     | SUBROUTINE LEFT_PAREN type_name_list RIGHT_PAREN {
         parseContext.spvRemoved($1.loc, "subroutine");
         parseContext.globalCheck($1.loc, "subroutine");
         parseContext.unimplemented($1.loc, "subroutine");
         $$.init($1.loc);
     }
     ;

 type_name_list
     : IDENTIFIER {
         // TODO
     }
     | type_name_list COMMA IDENTIFIER {
         // TODO: 4.0 semantics: subroutines
         // 1) make sure each identifier is a type declared earlier with SUBROUTINE
         // 2) save all of the identifiers for future comparison with the declared function
     }
     ;

 type_specifier
     : type_specifier_nonarray {
         $$ = $1;
         $$.qualifier.precision = parseContext.getDefaultPrecision($$);
     }
     | type_specifier_nonarray array_specifier {
         parseContext.arrayDimCheck($2.loc, $2.arraySizes, 0);
         $$ = $1;
         $$.qualifier.precision = parseContext.getDefaultPrecision($$);
         $$.arraySizes = $2.arraySizes;
     }
     ;

 array_specifier
     : LEFT_BRACKET RIGHT_BRACKET {
         $$.loc = $1.loc;
         $$.arraySizes = new TArraySizes;
         $$.arraySizes->addInnerSize();
     }
     | LEFT_BRACKET conditional_expression RIGHT_BRACKET {
         $$.loc = $1.loc;
         $$.arraySizes = new TArraySizes;

         TArraySize size;
         parseContext.arraySizeCheck($2->getLoc(), $2, size);
         $$.arraySizes->addInnerSize(size);
     }
     | array_specifier LEFT_BRACKET RIGHT_BRACKET {
         $$ = $1;
         $$.arraySizes->addInnerSize();
     }
     | array_specifier LEFT_BRACKET conditional_expression RIGHT_BRACKET {
         $$ = $1;

         TArraySize size;
         parseContext.arraySizeCheck($3->getLoc(), $3, size);
         $$.arraySizes->addInnerSize(size);
     }
     ;

 type_specifier_nonarray
     : VOID {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtVoid;
     }
     | FLOAT {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat;
     }
     | DOUBLE {
         parseContext.doubleCheck($1.loc, "double");
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtDouble;
     }
     | FLOAT16_T {
         parseContext.float16Check($1.loc, "float16_t", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat16;
     }
     | FLOAT32_T {
         parseContext.explicitFloat32Check($1.loc, "float32_t", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat;
     }
     | FLOAT64_T {
         parseContext.explicitFloat64Check($1.loc, "float64_t", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtDouble;
     }
     | INT {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtInt;
     }
     | UINT {
         parseContext.fullIntegerCheck($1.loc, "unsigned integer");
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtUint;
     }
     | INT8_T {
         parseContext.explicitInt8Check($1.loc, "8-bit signed integer", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtInt8;
     }
     | UINT8_T {
         parseContext.explicitInt8Check($1.loc, "8-bit unsigned integer", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtUint8;
     }
     | INT16_T {
         parseContext.explicitInt16Check($1.loc, "16-bit signed integer", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtInt16;
     }
     | UINT16_T {
         parseContext.explicitInt16Check($1.loc, "16-bit unsigned integer", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtUint16;
     }
     | INT32_T {
         parseContext.explicitInt32Check($1.loc, "32-bit signed integer", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtInt;
     }
     | UINT32_T {
         parseContext.explicitInt32Check($1.loc, "32-bit unsigned integer", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtUint;
     }
     | INT64_T {
         parseContext.int64Check($1.loc, "64-bit integer", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtInt64;
     }
     | UINT64_T {
         parseContext.int64Check($1.loc, "64-bit unsigned integer", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtUint64;
     }
     | BOOL {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtBool;
     }
     | VEC2 {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat;
         $$.setVector(2);
     }
     | VEC3 {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat;
         $$.setVector(3);
     }
     | VEC4 {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat;
         $$.setVector(4);
     }
     | DVEC2 {
         parseContext.doubleCheck($1.loc, "double vector");
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtDouble;
         $$.setVector(2);
     }
     | DVEC3 {
         parseContext.doubleCheck($1.loc, "double vector");
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtDouble;
         $$.setVector(3);
     }
     | DVEC4 {
         parseContext.doubleCheck($1.loc, "double vector");
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtDouble;
         $$.setVector(4);
     }
     | F16VEC2 {
         parseContext.float16Check($1.loc, "half float vector", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat16;
         $$.setVector(2);
     }
     | F16VEC3 {
         parseContext.float16Check($1.loc, "half float vector", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat16;
         $$.setVector(3);
     }
     | F16VEC4 {
         parseContext.float16Check($1.loc, "half float vector", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat16;
         $$.setVector(4);
     }
     | F32VEC2 {
     	parseContext.explicitFloat32Check($1.loc, "float32_t vector", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtFloat;
     	$$.setVector(2);
     }
     | F32VEC3 {
     	parseContext.explicitFloat32Check($1.loc, "float32_t vector", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtFloat;
     	$$.setVector(3);
     }
     | F32VEC4 {
     	parseContext.explicitFloat32Check($1.loc, "float32_t vector", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtFloat;
     	$$.setVector(4);
     }
     | F64VEC2 {
     	parseContext.explicitFloat64Check($1.loc, "float64_t vector", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtDouble;
     	$$.setVector(2);
     }
     | F64VEC3 {
     	parseContext.explicitFloat64Check($1.loc, "float64_t vector", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtDouble;
     	$$.setVector(3);
     }
     | F64VEC4 {
     	parseContext.explicitFloat64Check($1.loc, "float64_t vector", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtDouble;
     	$$.setVector(4);
     }
     | BVEC2 {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtBool;
         $$.setVector(2);
     }
     | BVEC3 {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtBool;
         $$.setVector(3);
     }
     | BVEC4 {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtBool;
         $$.setVector(4);
     }
     | IVEC2 {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtInt;
         $$.setVector(2);
     }
     | IVEC3 {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtInt;
         $$.setVector(3);
     }
     | IVEC4 {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtInt;
         $$.setVector(4);
     }
     | I8VEC2 {
  	   parseContext.explicitInt8Check($1.loc, "8-bit signed integer vector", parseContext.symbolTable.atBuiltInLevel());
  	   $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
  	   $$.basicType = EbtInt8;
  	   $$.setVector(2);
     }
     | I8VEC3 {
  	   parseContext.explicitInt8Check($1.loc, "8-bit signed integer vector", parseContext.symbolTable.atBuiltInLevel());
  	   $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
  	   $$.basicType = EbtInt8;
  	   $$.setVector(3);
     }
     | I8VEC4 {
  	   parseContext.explicitInt8Check($1.loc, "8-bit signed integer vector", parseContext.symbolTable.atBuiltInLevel());
  	   $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
  	   $$.basicType = EbtInt8;
  	   $$.setVector(4);
     }
     | I16VEC2 {
  	   parseContext.explicitInt16Check($1.loc, "16-bit signed integer vector", parseContext.symbolTable.atBuiltInLevel());
  	   $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
  	   $$.basicType = EbtInt16;
  	   $$.setVector(2);
     }
     | I16VEC3 {
  	   parseContext.explicitInt16Check($1.loc, "16-bit signed integer vector", parseContext.symbolTable.atBuiltInLevel());
  	   $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
  	   $$.basicType = EbtInt16;
  	   $$.setVector(3);
     }
     | I16VEC4 {
  	   parseContext.explicitInt16Check($1.loc, "16-bit signed integer vector", parseContext.symbolTable.atBuiltInLevel());
  	   $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
  	   $$.basicType = EbtInt16;
  	   $$.setVector(4);
     }
     | I32VEC2 {
         parseContext.explicitInt32Check($1.loc, "32-bit signed integer vector", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtInt;
         $$.setVector(2);
     }
     | I32VEC3 {
         parseContext.explicitInt32Check($1.loc, "32-bit signed integer vector", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtInt;
         $$.setVector(3);
     }
     | I32VEC4 {
         parseContext.explicitInt32Check($1.loc, "32-bit signed integer vector", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtInt;
         $$.setVector(4);
     }
     | I64VEC2 {
         parseContext.int64Check($1.loc, "64-bit integer vector", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtInt64;
         $$.setVector(2);
     }
     | I64VEC3 {
         parseContext.int64Check($1.loc, "64-bit integer vector", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtInt64;
         $$.setVector(3);
     }
     | I64VEC4 {
         parseContext.int64Check($1.loc, "64-bit integer vector", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtInt64;
         $$.setVector(4);
     }
     | UVEC2 {
         parseContext.fullIntegerCheck($1.loc, "unsigned integer vector");
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtUint;
         $$.setVector(2);
     }
     | UVEC3 {
         parseContext.fullIntegerCheck($1.loc, "unsigned integer vector");
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtUint;
         $$.setVector(3);
     }
     | UVEC4 {
         parseContext.fullIntegerCheck($1.loc, "unsigned integer vector");
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtUint;
         $$.setVector(4);
     }
     | U8VEC2 {
         parseContext.explicitInt8Check($1.loc, "8-bit unsigned integer vector", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtUint8;
         $$.setVector(2);
     }
     | U8VEC3 {
         parseContext.explicitInt8Check($1.loc, "8-bit unsigned integer vector", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtInt8;
         $$.setVector(3);
     }
     | U8VEC4 {
         parseContext.explicitInt8Check($1.loc, "8-bit unsigned integer vector", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtUint8;
         $$.setVector(4);
     }
     | U16VEC2 {
         parseContext.explicitInt16Check($1.loc, "16-bit unsigned integer vector", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtUint16;
         $$.setVector(2);
     }
     | U16VEC3 {
         parseContext.explicitInt16Check($1.loc, "16-bit unsigned integer vector", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtUint16;
         $$.setVector(3);
     }
     | U16VEC4 {
         parseContext.explicitInt16Check($1.loc, "16-bit unsigned integer vector", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtUint16;
         $$.setVector(4);
     }
     | U32VEC2 {
         parseContext.explicitInt32Check($1.loc, "32-bit unsigned integer vector", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtUint;
         $$.setVector(2);
     }
     | U32VEC3 {
         parseContext.explicitInt32Check($1.loc, "32-bit unsigned integer vector", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtUint;
         $$.setVector(3);
     }
     | U32VEC4 {
         parseContext.explicitInt32Check($1.loc, "32-bit unsigned integer vector", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtUint;
         $$.setVector(4);
     }
     | U64VEC2 {
         parseContext.int64Check($1.loc, "64-bit unsigned integer vector", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtUint64;
         $$.setVector(2);
     }
     | U64VEC3 {
         parseContext.int64Check($1.loc, "64-bit unsigned integer vector", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtUint64;
         $$.setVector(3);
     }
     | U64VEC4 {
         parseContext.int64Check($1.loc, "64-bit unsigned integer vector", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtUint64;
         $$.setVector(4);
     }
     | MAT2 {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat;
         $$.setMatrix(2, 2);
     }
     | MAT3 {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat;
         $$.setMatrix(3, 3);
     }
     | MAT4 {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat;
         $$.setMatrix(4, 4);
     }
     | MAT2X2 {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat;
         $$.setMatrix(2, 2);
     }
     | MAT2X3 {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat;
         $$.setMatrix(2, 3);
     }
     | MAT2X4 {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat;
         $$.setMatrix(2, 4);
     }
     | MAT3X2 {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat;
         $$.setMatrix(3, 2);
     }
     | MAT3X3 {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat;
         $$.setMatrix(3, 3);
     }
     | MAT3X4 {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat;
         $$.setMatrix(3, 4);
     }
     | MAT4X2 {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat;
         $$.setMatrix(4, 2);
     }
     | MAT4X3 {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat;
         $$.setMatrix(4, 3);
     }
     | MAT4X4 {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat;
         $$.setMatrix(4, 4);
     }
     | DMAT2 {
         parseContext.doubleCheck($1.loc, "double matrix");
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtDouble;
         $$.setMatrix(2, 2);
     }
     | DMAT3 {
         parseContext.doubleCheck($1.loc, "double matrix");
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtDouble;
         $$.setMatrix(3, 3);
     }
     | DMAT4 {
         parseContext.doubleCheck($1.loc, "double matrix");
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtDouble;
         $$.setMatrix(4, 4);
     }
     | DMAT2X2 {
         parseContext.doubleCheck($1.loc, "double matrix");
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtDouble;
         $$.setMatrix(2, 2);
     }
     | DMAT2X3 {
         parseContext.doubleCheck($1.loc, "double matrix");
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtDouble;
         $$.setMatrix(2, 3);
     }
     | DMAT2X4 {
         parseContext.doubleCheck($1.loc, "double matrix");
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtDouble;
         $$.setMatrix(2, 4);
     }
     | DMAT3X2 {
         parseContext.doubleCheck($1.loc, "double matrix");
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtDouble;
         $$.setMatrix(3, 2);
     }
     | DMAT3X3 {
         parseContext.doubleCheck($1.loc, "double matrix");
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtDouble;
         $$.setMatrix(3, 3);
     }
     | DMAT3X4 {
         parseContext.doubleCheck($1.loc, "double matrix");
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtDouble;
         $$.setMatrix(3, 4);
     }
     | DMAT4X2 {
         parseContext.doubleCheck($1.loc, "double matrix");
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtDouble;
         $$.setMatrix(4, 2);
     }
     | DMAT4X3 {
         parseContext.doubleCheck($1.loc, "double matrix");
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtDouble;
         $$.setMatrix(4, 3);
     }
     | DMAT4X4 {
         parseContext.doubleCheck($1.loc, "double matrix");
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtDouble;
         $$.setMatrix(4, 4);
     }
     | F16MAT2 {
         parseContext.float16Check($1.loc, "half float matrix", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat16;
         $$.setMatrix(2, 2);
     }
     | F16MAT3 {
         parseContext.float16Check($1.loc, "half float matrix", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat16;
         $$.setMatrix(3, 3);
     }
     | F16MAT4 {
         parseContext.float16Check($1.loc, "half float matrix", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat16;
         $$.setMatrix(4, 4);
     }
     | F16MAT2X2 {
         parseContext.float16Check($1.loc, "half float matrix", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat16;
         $$.setMatrix(2, 2);
     }
     | F16MAT2X3 {
         parseContext.float16Check($1.loc, "half float matrix", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat16;
         $$.setMatrix(2, 3);
     }
     | F16MAT2X4 {
         parseContext.float16Check($1.loc, "half float matrix", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat16;
         $$.setMatrix(2, 4);
     }
     | F16MAT3X2 {
         parseContext.float16Check($1.loc, "half float matrix", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat16;
         $$.setMatrix(3, 2);
     }
     | F16MAT3X3 {
         parseContext.float16Check($1.loc, "half float matrix", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat16;
         $$.setMatrix(3, 3);
     }
     | F16MAT3X4 {
         parseContext.float16Check($1.loc, "half float matrix", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat16;
         $$.setMatrix(3, 4);
     }
     | F16MAT4X2 {
         parseContext.float16Check($1.loc, "half float matrix", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat16;
         $$.setMatrix(4, 2);
     }
     | F16MAT4X3 {
         parseContext.float16Check($1.loc, "half float matrix", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat16;
         $$.setMatrix(4, 3);
     }
     | F16MAT4X4 {
         parseContext.float16Check($1.loc, "half float matrix", parseContext.symbolTable.atBuiltInLevel());
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtFloat16;
         $$.setMatrix(4, 4);
     }
     | F32MAT2 {
     	parseContext.explicitFloat32Check($1.loc, "float32_t matrix", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtFloat;
     	$$.setMatrix(2, 2);
     }
     | F32MAT3 {
     	parseContext.explicitFloat32Check($1.loc, "float32_t matrix", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtFloat;
     	$$.setMatrix(3, 3);
     }
     | F32MAT4 {
     	parseContext.explicitFloat32Check($1.loc, "float32_t matrix", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtFloat;
     	$$.setMatrix(4, 4);
     }
     | F32MAT2X2 {
     	parseContext.explicitFloat32Check($1.loc, "float32_t matrix", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtFloat;
     	$$.setMatrix(2, 2);
     }
     | F32MAT2X3 {
     	parseContext.explicitFloat32Check($1.loc, "float32_t matrix", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtFloat;
     	$$.setMatrix(2, 3);
     }
     | F32MAT2X4 {
     	parseContext.explicitFloat32Check($1.loc, "float32_t matrix", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtFloat;
     	$$.setMatrix(2, 4);
     }
     | F32MAT3X2 {
     	parseContext.explicitFloat32Check($1.loc, "float32_t matrix", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtFloat;
     	$$.setMatrix(3, 2);
     }
     | F32MAT3X3 {
     	parseContext.explicitFloat32Check($1.loc, "float32_t matrix", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtFloat;
     	$$.setMatrix(3, 3);
     }
     | F32MAT3X4 {
     	parseContext.explicitFloat32Check($1.loc, "float32_t matrix", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtFloat;
     	$$.setMatrix(3, 4);
     }
     | F32MAT4X2 {
     	parseContext.explicitFloat32Check($1.loc, "float32_t matrix", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtFloat;
     	$$.setMatrix(4, 2);
     }
     | F32MAT4X3 {
     	parseContext.explicitFloat32Check($1.loc, "float32_t matrix", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtFloat;
     	$$.setMatrix(4, 3);
     }
     | F32MAT4X4 {
     	parseContext.explicitFloat32Check($1.loc, "float32_t matrix", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtFloat;
     	$$.setMatrix(4, 4);
     }
     | F64MAT2 {
     	parseContext.explicitFloat64Check($1.loc, "float64_t matrix", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtDouble;
     	$$.setMatrix(2, 2);
     }
     | F64MAT3 {
     	parseContext.explicitFloat64Check($1.loc, "float64_t matrix", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtDouble;
     	$$.setMatrix(3, 3);
     }
     | F64MAT4 {
     	parseContext.explicitFloat64Check($1.loc, "float64_t matrix", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtDouble;
     	$$.setMatrix(4, 4);
     }
     | F64MAT2X2 {
     	parseContext.explicitFloat64Check($1.loc, "float64_t matrix", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtDouble;
     	$$.setMatrix(2, 2);
     }
     | F64MAT2X3 {
     	parseContext.explicitFloat64Check($1.loc, "float64_t matrix", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtDouble;
     	$$.setMatrix(2, 3);
     }
     | F64MAT2X4 {
     	parseContext.explicitFloat64Check($1.loc, "float64_t matrix", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtDouble;
     	$$.setMatrix(2, 4);
     }
     | F64MAT3X2 {
     	parseContext.explicitFloat64Check($1.loc, "float64_t matrix", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtDouble;
     	$$.setMatrix(3, 2);
     }
     | F64MAT3X3 {
     	parseContext.explicitFloat64Check($1.loc, "float64_t matrix", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtDouble;
     	$$.setMatrix(3, 3);
     }
     | F64MAT3X4 {
     	parseContext.explicitFloat64Check($1.loc, "float64_t matrix", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtDouble;
     	$$.setMatrix(3, 4);
     }
     | F64MAT4X2 {
     	parseContext.explicitFloat64Check($1.loc, "float64_t matrix", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtDouble;
     	$$.setMatrix(4, 2);
     }
     | F64MAT4X3 {
     	parseContext.explicitFloat64Check($1.loc, "float64_t matrix", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtDouble;
     	$$.setMatrix(4, 3);
     }
     | F64MAT4X4 {
     	parseContext.explicitFloat64Check($1.loc, "float64_t matrix", parseContext.symbolTable.atBuiltInLevel());
     	$$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
     	$$.basicType = EbtDouble;
     	$$.setMatrix(4, 4);
     }
     | ATOMIC_UINT {
         parseContext.vulkanRemoved($1.loc, "atomic counter types");
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtAtomicUint;
     }
     | SAMPLER1D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtFloat, Esd1D);
     }
     | SAMPLER2D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtFloat, Esd2D);
     }
     | SAMPLER3D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtFloat, Esd3D);
     }
     | SAMPLERCUBE {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtFloat, EsdCube);
     }
     | SAMPLER1DSHADOW {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtFloat, Esd1D, false, true);
     }
     | SAMPLER2DSHADOW {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtFloat, Esd2D, false, true);
     }
     | SAMPLERCUBESHADOW {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtFloat, EsdCube, false, true);
     }
     | SAMPLER1DARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtFloat, Esd1D, true);
     }
     | SAMPLER2DARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtFloat, Esd2D, true);
     }
     | SAMPLER1DARRAYSHADOW {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtFloat, Esd1D, true, true);
     }
     | SAMPLER2DARRAYSHADOW {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtFloat, Esd2D, true, true);
     }
     | SAMPLERCUBEARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtFloat, EsdCube, true);
     }
     | SAMPLERCUBEARRAYSHADOW {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtFloat, EsdCube, true, true);
     }
     | ISAMPLER1D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtInt, Esd1D);
     }
     | ISAMPLER2D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtInt, Esd2D);
     }
     | ISAMPLER3D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtInt, Esd3D);
     }
     | ISAMPLERCUBE {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtInt, EsdCube);
     }
     | ISAMPLER1DARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtInt, Esd1D, true);
     }
     | ISAMPLER2DARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtInt, Esd2D, true);
     }
     | ISAMPLERCUBEARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtInt, EsdCube, true);
     }
     | USAMPLER1D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtUint, Esd1D);
     }
     | USAMPLER2D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtUint, Esd2D);
     }
     | USAMPLER3D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtUint, Esd3D);
     }
     | USAMPLERCUBE {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtUint, EsdCube);
     }
     | USAMPLER1DARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtUint, Esd1D, true);
     }
     | USAMPLER2DARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtUint, Esd2D, true);
     }
     | USAMPLERCUBEARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtUint, EsdCube, true);
     }
     | SAMPLER2DRECT {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtFloat, EsdRect);
     }
     | SAMPLER2DRECTSHADOW {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtFloat, EsdRect, false, true);
     }
     | ISAMPLER2DRECT {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtInt, EsdRect);
     }
     | USAMPLER2DRECT {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtUint, EsdRect);
     }
     | SAMPLERBUFFER {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtFloat, EsdBuffer);
     }
     | ISAMPLERBUFFER {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtInt, EsdBuffer);
     }
     | USAMPLERBUFFER {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtUint, EsdBuffer);
     }
     | SAMPLER2DMS {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtFloat, Esd2D, false, false, true);
     }
     | ISAMPLER2DMS {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtInt, Esd2D, false, false, true);
     }
     | USAMPLER2DMS {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtUint, Esd2D, false, false, true);
     }
     | SAMPLER2DMSARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtFloat, Esd2D, true, false, true);
     }
     | ISAMPLER2DMSARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtInt, Esd2D, true, false, true);
     }
     | USAMPLER2DMSARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.set(EbtUint, Esd2D, true, false, true);
     }
     | SAMPLER {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setPureSampler(false);
     }
     | SAMPLERSHADOW {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setPureSampler(true);
     }
     | TEXTURE1D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtFloat, Esd1D);
     }
     | TEXTURE2D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtFloat, Esd2D);
     }
     | TEXTURE3D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtFloat, Esd3D);
     }
     | TEXTURECUBE {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtFloat, EsdCube);
     }
     | TEXTURE1DARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtFloat, Esd1D, true);
     }
     | TEXTURE2DARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtFloat, Esd2D, true);
     }
     | TEXTURECUBEARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtFloat, EsdCube, true);
     }
     | ITEXTURE1D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtInt, Esd1D);
     }
     | ITEXTURE2D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtInt, Esd2D);
     }
     | ITEXTURE3D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtInt, Esd3D);
     }
     | ITEXTURECUBE {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtInt, EsdCube);
     }
     | ITEXTURE1DARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtInt, Esd1D, true);
     }
     | ITEXTURE2DARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtInt, Esd2D, true);
     }
     | ITEXTURECUBEARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtInt, EsdCube, true);
     }
     | UTEXTURE1D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtUint, Esd1D);
     }
     | UTEXTURE2D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtUint, Esd2D);
     }
     | UTEXTURE3D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtUint, Esd3D);
     }
     | UTEXTURECUBE {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtUint, EsdCube);
     }
     | UTEXTURE1DARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtUint, Esd1D, true);
     }
     | UTEXTURE2DARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtUint, Esd2D, true);
     }
     | UTEXTURECUBEARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtUint, EsdCube, true);
     }
     | TEXTURE2DRECT {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtFloat, EsdRect);
     }
     | ITEXTURE2DRECT {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtInt, EsdRect);
     }
     | UTEXTURE2DRECT {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtUint, EsdRect);
     }
     | TEXTUREBUFFER {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtFloat, EsdBuffer);
     }
     | ITEXTUREBUFFER {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtInt, EsdBuffer);
     }
     | UTEXTUREBUFFER {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtUint, EsdBuffer);
     }
     | TEXTURE2DMS {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtFloat, Esd2D, false, false, true);
     }
     | ITEXTURE2DMS {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtInt, Esd2D, false, false, true);
     }
     | UTEXTURE2DMS {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtUint, Esd2D, false, false, true);
     }
     | TEXTURE2DMSARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtFloat, Esd2D, true, false, true);
     }
     | ITEXTURE2DMSARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtInt, Esd2D, true, false, true);
     }
     | UTEXTURE2DMSARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setTexture(EbtUint, Esd2D, true, false, true);
     }
     | IMAGE1D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtFloat, Esd1D);
     }
     | IIMAGE1D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtInt, Esd1D);
     }
     | UIMAGE1D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtUint, Esd1D);
     }
     | IMAGE2D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtFloat, Esd2D);
     }
     | IIMAGE2D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtInt, Esd2D);
     }
     | UIMAGE2D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtUint, Esd2D);
     }
     | IMAGE3D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtFloat, Esd3D);
     }
     | IIMAGE3D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtInt, Esd3D);
     }
     | UIMAGE3D {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtUint, Esd3D);
     }
     | IMAGE2DRECT {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtFloat, EsdRect);
     }
     | IIMAGE2DRECT {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtInt, EsdRect);
     }
     | UIMAGE2DRECT {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtUint, EsdRect);
     }
     | IMAGECUBE {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtFloat, EsdCube);
     }
     | IIMAGECUBE {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtInt, EsdCube);
     }
     | UIMAGECUBE {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtUint, EsdCube);
     }
     | IMAGEBUFFER {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtFloat, EsdBuffer);
     }
     | IIMAGEBUFFER {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtInt, EsdBuffer);
     }
     | UIMAGEBUFFER {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtUint, EsdBuffer);
     }
     | IMAGE1DARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtFloat, Esd1D, true);
     }
     | IIMAGE1DARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtInt, Esd1D, true);
     }
     | UIMAGE1DARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtUint, Esd1D, true);
     }
     | IMAGE2DARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtFloat, Esd2D, true);
     }
     | IIMAGE2DARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtInt, Esd2D, true);
     }
     | UIMAGE2DARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtUint, Esd2D, true);
     }
     | IMAGECUBEARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtFloat, EsdCube, true);
     }
     | IIMAGECUBEARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtInt, EsdCube, true);
     }
     | UIMAGECUBEARRAY {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtUint, EsdCube, true);
     }
     | IMAGE2DMS {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtFloat, Esd2D, false, false, true);
     }
     | IIMAGE2DMS {
         $$.init($1.loc, parseContext.symbolTable.atGlobalLevel());
         $$.basicType = EbtSampler;
         $$.sampler.setImage(EbtInt, Esd2D, false, false, true);
     }