%{
/*
* Copyright © 2008, 2009 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifndef _MSC_VER
#include <strings.h>
#endif
#include <assert.h>
#include "ast.h"
#include "glsl_parser_extras.h"
#include "glsl_types.h"
#include "main/context.h"
#ifdef _MSC_VER
#pragma warning( disable : 4065 ) // switch statement contains 'default' but no 'case' labels
#endif
#undef yyerror
static void yyerror(YYLTYPE *loc, _mesa_glsl_parse_state *st, const char *msg)
{
_mesa_glsl_error(loc, st, "%s", msg);
}
static int
_mesa_glsl_lex(YYSTYPE *val, YYLTYPE *loc, _mesa_glsl_parse_state *state)
{
return _mesa_glsl_lexer_lex(val, loc, state->scanner);
}
static bool match_layout_qualifier(const char *s1, const char *s2,
_mesa_glsl_parse_state *state)
{
/* From the GLSL 1.50 spec, section 4.3.8 (Layout Qualifiers):
*
* "The tokens in any layout-qualifier-id-list ... are not case
* sensitive, unless explicitly noted otherwise."
*
* The text "unless explicitly noted otherwise" appears to be
* vacuous--no desktop GLSL spec (up through GLSL 4.40) notes
* otherwise.
*
* However, the GLSL ES 3.00 spec says, in section 4.3.8 (Layout
* Qualifiers):
*
* "As for other identifiers, they are case sensitive."
*
* So we need to do a case-sensitive or a case-insensitive match,
* depending on whether we are compiling for GLSL ES.
*/
if (state->es_shader)
return strcmp(s1, s2);
else
return strcasecmp(s1, s2);
}
%}
%expect 0
%pure-parser
%error-verbose
%locations
%initial-action {
@$.first_line = 1;
@$.first_column = 1;
@$.last_line = 1;
@$.last_column = 1;
@$.source = 0;
}
%lex-param {struct _mesa_glsl_parse_state *state}
%parse-param {struct _mesa_glsl_parse_state *state}
%union {
int n;
float real;
double dreal;
const char *identifier;
struct ast_type_qualifier type_qualifier;
ast_node *node;
ast_type_specifier *type_specifier;
ast_array_specifier *array_specifier;
ast_fully_specified_type *fully_specified_type;
ast_function *function;
ast_parameter_declarator *parameter_declarator;
ast_function_definition *function_definition;
ast_compound_statement *compound_statement;
ast_expression *expression;
ast_declarator_list *declarator_list;
ast_struct_specifier *struct_specifier;
ast_declaration *declaration;
ast_switch_body *switch_body;
ast_case_label *case_label;
ast_case_label_list *case_label_list;
ast_case_statement *case_statement;
ast_case_statement_list *case_statement_list;
ast_interface_block *interface_block;
struct {
ast_node *cond;
ast_expression *rest;
} for_rest_statement;
struct {
ast_node *then_statement;
ast_node *else_statement;
} selection_rest_statement;
}
%token ATTRIBUTE CONST_TOK BOOL_TOK FLOAT_TOK INT_TOK UINT_TOK DOUBLE_TOK
%token BREAK CONTINUE DO ELSE FOR IF DISCARD RETURN SWITCH CASE DEFAULT
%token BVEC2 BVEC3 BVEC4 IVEC2 IVEC3 IVEC4 UVEC2 UVEC3 UVEC4 VEC2 VEC3 VEC4 DVEC2 DVEC3 DVEC4
%token CENTROID IN_TOK OUT_TOK INOUT_TOK UNIFORM VARYING SAMPLE
%token NOPERSPECTIVE FLAT SMOOTH
%token MAT2X2 MAT2X3 MAT2X4
%token MAT3X2 MAT3X3 MAT3X4
%token MAT4X2 MAT4X3 MAT4X4
%token DMAT2X2 DMAT2X3 DMAT2X4
%token DMAT3X2 DMAT3X3 DMAT3X4
%token DMAT4X2 DMAT4X3 DMAT4X4
%token SAMPLER1D SAMPLER2D SAMPLER3D SAMPLERCUBE SAMPLER1DSHADOW SAMPLER2DSHADOW
%token SAMPLERCUBESHADOW SAMPLER1DARRAY SAMPLER2DARRAY SAMPLER1DARRAYSHADOW
%token SAMPLER2DARRAYSHADOW SAMPLERCUBEARRAY SAMPLERCUBEARRAYSHADOW
%token ISAMPLER1D ISAMPLER2D ISAMPLER3D ISAMPLERCUBE
%token ISAMPLER1DARRAY ISAMPLER2DARRAY ISAMPLERCUBEARRAY
%token USAMPLER1D USAMPLER2D USAMPLER3D USAMPLERCUBE USAMPLER1DARRAY
%token USAMPLER2DARRAY USAMPLERCUBEARRAY
%token SAMPLER2DRECT ISAMPLER2DRECT USAMPLER2DRECT SAMPLER2DRECTSHADOW
%token SAMPLERBUFFER ISAMPLERBUFFER USAMPLERBUFFER
%token SAMPLER2DMS ISAMPLER2DMS USAMPLER2DMS
%token SAMPLER2DMSARRAY ISAMPLER2DMSARRAY USAMPLER2DMSARRAY
%token SAMPLEREXTERNALOES
%token IMAGE1D IMAGE2D IMAGE3D IMAGE2DRECT IMAGECUBE IMAGEBUFFER
%token IMAGE1DARRAY IMAGE2DARRAY IMAGECUBEARRAY IMAGE2DMS IMAGE2DMSARRAY
%token IIMAGE1D IIMAGE2D IIMAGE3D IIMAGE2DRECT IIMAGECUBE IIMAGEBUFFER
%token IIMAGE1DARRAY IIMAGE2DARRAY IIMAGECUBEARRAY IIMAGE2DMS IIMAGE2DMSARRAY
%token UIMAGE1D UIMAGE2D UIMAGE3D UIMAGE2DRECT UIMAGECUBE UIMAGEBUFFER
%token UIMAGE1DARRAY UIMAGE2DARRAY UIMAGECUBEARRAY UIMAGE2DMS UIMAGE2DMSARRAY
%token IMAGE1DSHADOW IMAGE2DSHADOW IMAGE1DARRAYSHADOW IMAGE2DARRAYSHADOW
%token COHERENT VOLATILE RESTRICT READONLY WRITEONLY
%token ATOMIC_UINT
%token STRUCT VOID_TOK WHILE
%token <identifier> IDENTIFIER TYPE_IDENTIFIER NEW_IDENTIFIER
%type <identifier> any_identifier
%type <interface_block> instance_name_opt
%token <real> FLOATCONSTANT
%token <dreal> DOUBLECONSTANT
%token <n> INTCONSTANT UINTCONSTANT BOOLCONSTANT
%token <identifier> FIELD_SELECTION
%token LEFT_OP RIGHT_OP
%token INC_OP DEC_OP LE_OP GE_OP EQ_OP NE_OP
%token AND_OP OR_OP XOR_OP MUL_ASSIGN DIV_ASSIGN ADD_ASSIGN
%token MOD_ASSIGN LEFT_ASSIGN RIGHT_ASSIGN AND_ASSIGN XOR_ASSIGN OR_ASSIGN
%token SUB_ASSIGN
%token INVARIANT PRECISE
%token LOWP MEDIUMP HIGHP SUPERP PRECISION
%token VERSION_TOK EXTENSION LINE COLON EOL INTERFACE OUTPUT
%token PRAGMA_DEBUG_ON PRAGMA_DEBUG_OFF
%token PRAGMA_OPTIMIZE_ON PRAGMA_OPTIMIZE_OFF
%token PRAGMA_INVARIANT_ALL
%token LAYOUT_TOK
/* Reserved words that are not actually used in the grammar.
*/
%token ASM CLASS UNION ENUM TYPEDEF TEMPLATE THIS PACKED_TOK GOTO
%token INLINE_TOK NOINLINE PUBLIC_TOK STATIC EXTERN EXTERNAL
%token LONG_TOK SHORT_TOK HALF FIXED_TOK UNSIGNED INPUT_TOK
%token HVEC2 HVEC3 HVEC4 FVEC2 FVEC3 FVEC4
%token SAMPLER3DRECT
%token SIZEOF CAST NAMESPACE USING
%token RESOURCE PATCH
%token SUBROUTINE
%token ERROR_TOK
%token COMMON PARTITION ACTIVE FILTER ROW_MAJOR
%type <identifier> variable_identifier
%type <node> statement
%type <node> statement_list
%type <node> simple_statement
%type <n> precision_qualifier
%type <type_qualifier> type_qualifier
%type <type_qualifier> auxiliary_storage_qualifier
%type <type_qualifier> storage_qualifier
%type <type_qualifier> interpolation_qualifier
%type <type_qualifier> layout_qualifier
%type <type_qualifier> layout_qualifier_id_list layout_qualifier_id
%type <type_qualifier> interface_block_layout_qualifier
%type <type_qualifier> memory_qualifier
%type <type_qualifier> interface_qualifier
%type <type_specifier> type_specifier
%type <type_specifier> type_specifier_nonarray
%type <array_specifier> array_specifier
%type <identifier> basic_type_specifier_nonarray
%type <fully_specified_type> fully_specified_type
%type <function> function_prototype
%type <function> function_header
%type <function> function_header_with_parameters
%type <function> function_declarator
%type <parameter_declarator> parameter_declarator
%type <parameter_declarator> parameter_declaration
%type <type_qualifier> parameter_qualifier
%type <type_qualifier> parameter_direction_qualifier
%type <type_specifier> parameter_type_specifier
%type <function_definition> function_definition
%type <compound_statement> compound_statement_no_new_scope
%type <compound_statement> compound_statement
%type <node> statement_no_new_scope
%type <node> expression_statement
%type <expression> expression
%type <expression> primary_expression
%type <expression> assignment_expression
%type <expression> conditional_expression
%type <expression> logical_or_expression
%type <expression> logical_xor_expression
%type <expression> logical_and_expression
%type <expression> inclusive_or_expression
%type <expression> exclusive_or_expression
%type <expression> and_expression
%type <expression> equality_expression
%type <expression> relational_expression
%type <expression> shift_expression
%type <expression> additive_expression
%type <expression> multiplicative_expression
%type <expression> unary_expression
%type <expression> constant_expression
%type <expression> integer_expression
%type <expression> postfix_expression
%type <expression> function_call_header_with_parameters
%type <expression> function_call_header_no_parameters
%type <expression> function_call_header
%type <expression> function_call_generic
%type <expression> function_call_or_method
%type <expression> function_call
%type <expression> method_call_generic
%type <expression> method_call_header_with_parameters
%type <expression> method_call_header_no_parameters
%type <expression> method_call_header
%type <n> assignment_operator
%type <n> unary_operator
%type <expression> function_identifier
%type <node> external_declaration
%type <declarator_list> init_declarator_list
%type <declarator_list> single_declaration
%type <expression> initializer
%type <expression> initializer_list
%type <node> declaration
%type <node> declaration_statement
%type <node> jump_statement
%type <node> interface_block
%type <interface_block> basic_interface_block
%type <struct_specifier> struct_specifier
%type <declarator_list> struct_declaration_list
%type <declarator_list> struct_declaration
%type <declaration> struct_declarator
%type <declaration> struct_declarator_list
%type <declarator_list> member_list
%type <declarator_list> member_declaration
%type <node> selection_statement
%type <selection_rest_statement> selection_rest_statement
%type <node> switch_statement
%type <switch_body> switch_body
%type <case_label_list> case_label_list
%type <case_label> case_label
%type <case_statement> case_statement
%type <case_statement_list> case_statement_list
%type <node> iteration_statement
%type <node> condition
%type <node> conditionopt
%type <node> for_init_statement
%type <for_rest_statement> for_rest_statement
%type <n> integer_constant
%type <node> layout_defaults
%right THEN ELSE
%%
translation_unit:
version_statement extension_statement_list
{
_mesa_glsl_initialize_types(state);
}
external_declaration_list
{
delete state->symbols;
state->symbols = new(ralloc_parent(state)) glsl_symbol_table;
_mesa_glsl_initialize_types(state);
}
;
version_statement:
/* blank - no #version specified: defaults are already set */
| VERSION_TOK INTCONSTANT EOL
{
state->process_version_directive(&@2, $2, NULL);
if (state->error) {
YYERROR;
}
}
| VERSION_TOK INTCONSTANT any_identifier EOL
{
state->process_version_directive(&@2, $2, $3);
if (state->error) {
YYERROR;
}
}
;
pragma_statement:
PRAGMA_DEBUG_ON EOL
| PRAGMA_DEBUG_OFF EOL
| PRAGMA_OPTIMIZE_ON EOL
| PRAGMA_OPTIMIZE_OFF EOL
| PRAGMA_INVARIANT_ALL EOL
{
/* Pragma invariant(all) cannot be used in a fragment shader.
*
* Page 27 of the GLSL 1.20 spec, Page 53 of the GLSL ES 3.00 spec:
*
* "It is an error to use this pragma in a fragment shader."
*/
if (state->is_version(120, 300) &&
state->stage == MESA_SHADER_FRAGMENT) {
_mesa_glsl_error(& @1, state,
"pragma `invariant(all)' cannot be used "
"in a fragment shader.");
} else if (!state->is_version(120, 100)) {
_mesa_glsl_warning(& @1, state,
"pragma `invariant(all)' not supported in %s "
"(GLSL ES 1.00 or GLSL 1.20 required)",
state->get_version_string());
} else {
state->all_invariant = true;
}
}
;
extension_statement_list:
| extension_statement_list extension_statement
;
any_identifier:
IDENTIFIER
| TYPE_IDENTIFIER
| NEW_IDENTIFIER
;
extension_statement:
EXTENSION any_identifier COLON any_identifier EOL
{
if (!_mesa_glsl_process_extension($2, & @2, $4, & @4, state)) {
YYERROR;
}
}
;
external_declaration_list:
external_declaration
{
/* FINISHME: The NULL test is required because pragmas are set to
* FINISHME: NULL. (See production rule for external_declaration.)
*/
if ($1 != NULL)
state->translation_unit.push_tail(& $1->link);
}
| external_declaration_list external_declaration
{
/* FINISHME: The NULL test is required because pragmas are set to
* FINISHME: NULL. (See production rule for external_declaration.)
*/
if ($2 != NULL)
state->translation_unit.push_tail(& $2->link);
}
| external_declaration_list extension_statement {
if (!state->allow_extension_directive_midshader) {
_mesa_glsl_error(& @2, state,
"#extension directive is not allowed "
"in the middle of a shader");
YYERROR;
}
}
;
variable_identifier:
IDENTIFIER
| NEW_IDENTIFIER
;
primary_expression:
variable_identifier
{
void *ctx = state;
$$ = new(ctx) ast_expression(ast_identifier, NULL, NULL, NULL);
$$->set_location(@1);
$$->primary_expression.identifier = $1;
}
| INTCONSTANT
{
void *ctx = state;
$$ = new(ctx) ast_expression(ast_int_constant, NULL, NULL, NULL);
$$->set_location(@1);
$$->primary_expression.int_constant = $1;
}
| UINTCONSTANT
{
void *ctx = state;
$$ = new(ctx) ast_expression(ast_uint_constant, NULL, NULL, NULL);
$$->set_location(@1);
$$->primary_expression.uint_constant = $1;
}
| FLOATCONSTANT
{
void *ctx = state;
$$ = new(ctx) ast_expression(ast_float_constant, NULL, NULL, NULL);
$$->set_location(@1);
$$->primary_expression.float_constant = $1;
}
| DOUBLECONSTANT
{
void *ctx = state;
$$ = new(ctx) ast_expression(ast_double_constant, NULL, NULL, NULL);
$$->set_location(@1);
$$->primary_expression.double_constant = $1;
}
| BOOLCONSTANT
{
void *ctx = state;
$$ = new(ctx) ast_expression(ast_bool_constant, NULL, NULL, NULL);
$$->set_location(@1);
$$->primary_expression.bool_constant = $1;
}
| '(' expression ')'
{
$$ = $2;
}
;
postfix_expression:
primary_expression
| postfix_expression '[' integer_expression ']'
{
void *ctx = state;
$$ = new(ctx) ast_expression(ast_array_index, $1, $3, NULL);
$$->set_location_range(@1, @4);
}
| function_call
{
$$ = $1;
}
| postfix_expression '.' any_identifier
{
void *ctx = state;
$$ = new(ctx) ast_expression(ast_field_selection, $1, NULL, NULL);
$$->set_location_range(@1, @3);
$$->primary_expression.identifier = $3;
}
| postfix_expression INC_OP
{
void *ctx = state;
$$ = new(ctx) ast_expression(ast_post_inc, $1, NULL, NULL);
$$->set_location_range(@1, @2);
}
| postfix_expression DEC_OP
{
void *ctx = state;
$$ = new(ctx) ast_expression(ast_post_dec, $1, NULL, NULL);
$$->set_location_range(@1, @2);
}
;
integer_expression:
expression
;
function_call:
function_call_or_method
;
function_call_or_method:
function_call_generic
| postfix_expression '.' method_call_generic
{
void *ctx = state;
$$ = new(ctx) ast_expression(ast_field_selection, $1, $3, NULL);
$$->set_location_range(@1, @3);
}
;
function_call_generic:
function_call_header_with_parameters ')'
| function_call_header_no_parameters ')'
;
function_call_header_no_parameters:
function_call_header VOID_TOK
| function_call_header
;
function_call_header_with_parameters:
function_call_header assignment_expression
{
$$ = $1;
$$->set_location(@1);
$$->expressions.push_tail(& $2->link);
}
| function_call_header_with_parameters ',' assignment_expression
{
$$ = $1;
$$->set_location(@1);
$$->expressions.push_tail(& $3->link);
}
;
// Grammar Note: Constructors look like functions, but lexical
// analysis recognized most of them as keywords. They are now
// recognized through "type_specifier".
function_call_header:
function_identifier '('
;
function_identifier:
type_specifier
{
void *ctx = state;
$$ = new(ctx) ast_function_expression($1);
$$->set_location(@1);
}
| variable_identifier
{
void *ctx = state;
ast_expression *callee = new(ctx) ast_expression($1);
callee->set_location(@1);
$$ = new(ctx) ast_function_expression(callee);
$$->set_location(@1);
}
| FIELD_SELECTION
{
void *ctx = state;
ast_expression *callee = new(ctx) ast_expression($1);
callee->set_location(@1);
$$ = new(ctx) ast_function_expression(callee);
$$->set_location(@1);
}
;
method_call_generic:
method_call_header_with_parameters ')'
| method_call_header_no_parameters ')'
;
method_call_header_no_parameters:
method_call_header VOID_TOK
| method_call_header
;
method_call_header_with_parameters:
method_call_header assignment_expression
{
$$ = $1;
$$->set_location(@1);
$$->expressions.push_tail(& $2->link);
}
| method_call_header_with_parameters ',' assignment_expression
{
$$ = $1;
$$->set_location(@1);
$$->expressions.push_tail(& $3->link);
}
;
// Grammar Note: Constructors look like methods, but lexical
// analysis recognized most of them as keywords. They are now
// recognized through "type_specifier".
method_call_header:
variable_identifier '('
{
void *ctx = state;
ast_expression *callee = new(ctx) ast_expression($1);
callee->set_location(@1);
$$ = new(ctx) ast_function_expression(callee);
$$->set_location(@1);
}
;
// Grammar Note: No traditional style type casts.
unary_expression:
postfix_expression
| INC_OP unary_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression(ast_pre_inc, $2, NULL, NULL);
$$->set_location(@1);
}
| DEC_OP unary_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression(ast_pre_dec, $2, NULL, NULL);
$$->set_location(@1);
}
| unary_operator unary_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression($1, $2, NULL, NULL);
$$->set_location_range(@1, @2);
}
;
// Grammar Note: No '*' or '&' unary ops. Pointers are not supported.
unary_operator:
'+' { $$ = ast_plus; }
| '-' { $$ = ast_neg; }
| '!' { $$ = ast_logic_not; }
| '~' { $$ = ast_bit_not; }
;
multiplicative_expression:
unary_expression
| multiplicative_expression '*' unary_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_mul, $1, $3);
$$->set_location_range(@1, @3);
}
| multiplicative_expression '/' unary_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_div, $1, $3);
$$->set_location_range(@1, @3);
}
| multiplicative_expression '%' unary_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_mod, $1, $3);
$$->set_location_range(@1, @3);
}
;
additive_expression:
multiplicative_expression
| additive_expression '+' multiplicative_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_add, $1, $3);
$$->set_location_range(@1, @3);
}
| additive_expression '-' multiplicative_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_sub, $1, $3);
$$->set_location_range(@1, @3);
}
;
shift_expression:
additive_expression
| shift_expression LEFT_OP additive_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_lshift, $1, $3);
$$->set_location_range(@1, @3);
}
| shift_expression RIGHT_OP additive_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_rshift, $1, $3);
$$->set_location_range(@1, @3);
}
;
relational_expression:
shift_expression
| relational_expression '<' shift_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_less, $1, $3);
$$->set_location_range(@1, @3);
}
| relational_expression '>' shift_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_greater, $1, $3);
$$->set_location_range(@1, @3);
}
| relational_expression LE_OP shift_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_lequal, $1, $3);
$$->set_location_range(@1, @3);
}
| relational_expression GE_OP shift_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_gequal, $1, $3);
$$->set_location_range(@1, @3);
}
;
equality_expression:
relational_expression
| equality_expression EQ_OP relational_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_equal, $1, $3);
$$->set_location_range(@1, @3);
}
| equality_expression NE_OP relational_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_nequal, $1, $3);
$$->set_location_range(@1, @3);
}
;
and_expression:
equality_expression
| and_expression '&' equality_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_bit_and, $1, $3);
$$->set_location_range(@1, @3);
}
;
exclusive_or_expression:
and_expression
| exclusive_or_expression '^' and_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_bit_xor, $1, $3);
$$->set_location_range(@1, @3);
}
;
inclusive_or_expression:
exclusive_or_expression
| inclusive_or_expression '|' exclusive_or_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_bit_or, $1, $3);
$$->set_location_range(@1, @3);
}
;
logical_and_expression:
inclusive_or_expression
| logical_and_expression AND_OP inclusive_or_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_logic_and, $1, $3);
$$->set_location_range(@1, @3);
}
;
logical_xor_expression:
logical_and_expression
| logical_xor_expression XOR_OP logical_and_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_logic_xor, $1, $3);
$$->set_location_range(@1, @3);
}
;
logical_or_expression:
logical_xor_expression
| logical_or_expression OR_OP logical_xor_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_logic_or, $1, $3);
$$->set_location_range(@1, @3);
}
;
conditional_expression:
logical_or_expression
| logical_or_expression '?' expression ':' assignment_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression(ast_conditional, $1, $3, $5);
$$->set_location_range(@1, @5);
}
;
assignment_expression:
conditional_expression
| unary_expression assignment_operator assignment_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression($2, $1, $3, NULL);
$$->set_location_range(@1, @3);
}
;
assignment_operator:
'=' { $$ = ast_assign; }
| MUL_ASSIGN { $$ = ast_mul_assign; }
| DIV_ASSIGN { $$ = ast_div_assign; }
| MOD_ASSIGN { $$ = ast_mod_assign; }
| ADD_ASSIGN { $$ = ast_add_assign; }
| SUB_ASSIGN { $$ = ast_sub_assign; }
| LEFT_ASSIGN { $$ = ast_ls_assign; }
| RIGHT_ASSIGN { $$ = ast_rs_assign; }
| AND_ASSIGN { $$ = ast_and_assign; }
| XOR_ASSIGN { $$ = ast_xor_assign; }
| OR_ASSIGN { $$ = ast_or_assign; }
;
expression:
assignment_expression
{
$$ = $1;
}
| expression ',' assignment_expression
{
void *ctx = state;
if ($1->oper != ast_sequence) {
$$ = new(ctx) ast_expression(ast_sequence, NULL, NULL, NULL);
$$->set_location_range(@1, @3);
$$->expressions.push_tail(& $1->link);
} else {
$$ = $1;
}
$$->expressions.push_tail(& $3->link);
}
;
constant_expression:
conditional_expression
;
declaration:
function_prototype ';'
{
state->symbols->pop_scope();
$$ = $1;
}
| init_declarator_list ';'
{
$$ = $1;
}
| PRECISION precision_qualifier type_specifier ';'
{
$3->default_precision = $2;
$$ = $3;
}
| interface_block
{
$$ = $1;
}
;
function_prototype:
function_declarator ')'
;
function_declarator:
function_header
| function_header_with_parameters
;
function_header_with_parameters:
function_header parameter_declaration
{
$$ = $1;
$$->parameters.push_tail(& $2->link);
}
| function_header_with_parameters ',' parameter_declaration
{
$$ = $1;
$$->parameters.push_tail(& $3->link);
}
;
function_header:
fully_specified_type variable_identifier '('
{
void *ctx = state;
$$ = new(ctx) ast_function();
$$->set_location(@2);
$$->return_type = $1;
$$->identifier = $2;
state->symbols->add_function(new(state) ir_function($2));
state->symbols->push_scope();
}
;
parameter_declarator:
type_specifier any_identifier
{
void *ctx = state;
$$ = new(ctx) ast_parameter_declarator();
$$->set_location_range(@1, @2);
$$->type = new(ctx) ast_fully_specified_type();
$$->type->set_location(@1);
$$->type->specifier = $1;
$$->identifier = $2;
}
| type_specifier any_identifier array_specifier
{
void *ctx = state;
$$ = new(ctx) ast_parameter_declarator();
$$->set_location_range(@1, @3);
$$->type = new(ctx) ast_fully_specified_type();
$$->type->set_location(@1);
$$->type->specifier = $1;
$$->identifier = $2;
$$->array_specifier = $3;
}
;
parameter_declaration:
parameter_qualifier parameter_declarator
{
$$ = $2;
$$->type->qualifier = $1;
}
| parameter_qualifier parameter_type_specifier
{
void *ctx = state;
$$ = new(ctx) ast_parameter_declarator();
$$->set_location(@2);
$$->type = new(ctx) ast_fully_specified_type();
$$->type->set_location_range(@1, @2);
$$->type->qualifier = $1;
$$->type->specifier = $2;
}
;
parameter_qualifier:
/* empty */
{
memset(& $$, 0, sizeof($$));
}
| CONST_TOK parameter_qualifier
{
if ($2.flags.q.constant)
_mesa_glsl_error(&@1, state, "duplicate const qualifier");
$$ = $2;
$$.flags.q.constant = 1;
}
| PRECISE parameter_qualifier
{
if ($2.flags.q.precise)
_mesa_glsl_error(&@1, state, "duplicate precise qualifier");
$$ = $2;
$$.flags.q.precise = 1;
}
| parameter_direction_qualifier parameter_qualifier
{
if (($1.flags.q.in || $1.flags.q.out) && ($2.flags.q.in || $2.flags.q.out))
_mesa_glsl_error(&@1, state, "duplicate in/out/inout qualifier");
if (!state->ARB_shading_language_420pack_enable && $2.flags.q.constant)
_mesa_glsl_error(&@1, state, "in/out/inout must come after const "
"or precise");
$$ = $1;
$$.merge_qualifier(&@1, state, $2);
}
| precision_qualifier parameter_qualifier
{
if ($2.precision != ast_precision_none)
_mesa_glsl_error(&@1, state, "duplicate precision qualifier");
if (!state->ARB_shading_language_420pack_enable && $2.flags.i != 0)
_mesa_glsl_error(&@1, state, "precision qualifiers must come last");
$$ = $2;
$$.precision = $1;
}
| memory_qualifier parameter_qualifier
{
$$ = $1;
$$.merge_qualifier(&@1, state, $2);
}
parameter_direction_qualifier:
IN_TOK
{
memset(& $$, 0, sizeof($$));
$$.flags.q.in = 1;
}
| OUT_TOK
{
memset(& $$, 0, sizeof($$));
$$.flags.q.out = 1;
}
| INOUT_TOK
{
memset(& $$, 0, sizeof($$));
$$.flags.q.in = 1;
$$.flags.q.out = 1;
}
;
parameter_type_specifier:
type_specifier
;
init_declarator_list:
single_declaration
| init_declarator_list ',' any_identifier
{
void *ctx = state;
ast_declaration *decl = new(ctx) ast_declaration($3, NULL, NULL);
decl->set_location(@3);
$$ = $1;
$$->declarations.push_tail(&decl->link);
state->symbols->add_variable(new(state) ir_variable(NULL, $3, ir_var_auto));
}
| init_declarator_list ',' any_identifier array_specifier
{
void *ctx = state;
ast_declaration *decl = new(ctx) ast_declaration($3, $4, NULL);
decl->set_location_range(@3, @4);
$$ = $1;
$$->declarations.push_tail(&decl->link);
state->symbols->add_variable(new(state) ir_variable(NULL, $3, ir_var_auto));
}
| init_declarator_list ',' any_identifier array_specifier '=' initializer
{
void *ctx = state;
ast_declaration *decl = new(ctx) ast_declaration($3, $4, $6);
decl->set_location_range(@3, @4);
$$ = $1;
$$->declarations.push_tail(&decl->link);
state->symbols->add_variable(new(state) ir_variable(NULL, $3, ir_var_auto));
}
| init_declarator_list ',' any_identifier '=' initializer
{
void *ctx = state;
ast_declaration *decl = new(ctx) ast_declaration($3, NULL, $5);
decl->set_location(@3);
$$ = $1;
$$->declarations.push_tail(&decl->link);
state->symbols->add_variable(new(state) ir_variable(NULL, $3, ir_var_auto));
}
;
// Grammar Note: No 'enum', or 'typedef'.
single_declaration:
fully_specified_type
{
void *ctx = state;
/* Empty declaration list is valid. */
$$ = new(ctx) ast_declarator_list($1);
$$->set_location(@1);
}
| fully_specified_type any_identifier
{
void *ctx = state;
ast_declaration *decl = new(ctx) ast_declaration($2, NULL, NULL);
decl->set_location(@2);
$$ = new(ctx) ast_declarator_list($1);
$$->set_location_range(@1, @2);
$$->declarations.push_tail(&decl->link);
}
| fully_specified_type any_identifier array_specifier
{
void *ctx = state;
ast_declaration *decl = new(ctx) ast_declaration($2, $3, NULL);
decl->set_location_range(@2, @3);
$$ = new(ctx) ast_declarator_list($1);
$$->set_location_range(@1, @3);
$$->declarations.push_tail(&decl->link);
}
| fully_specified_type any_identifier array_specifier '=' initializer
{
void *ctx = state;
ast_declaration *decl = new(ctx) ast_declaration($2, $3, $5);
decl->set_location_range(@2, @3);
$$ = new(ctx) ast_declarator_list($1);
$$->set_location_range(@1, @3);
$$->declarations.push_tail(&decl->link);
}
| fully_specified_type any_identifier '=' initializer
{
void *ctx = state;
ast_declaration *decl = new(ctx) ast_declaration($2, NULL, $4);
decl->set_location(@2);
$$ = new(ctx) ast_declarator_list($1);
$$->set_location_range(@1, @2);
$$->declarations.push_tail(&decl->link);
}
| INVARIANT variable_identifier
{
void *ctx = state;
ast_declaration *decl = new(ctx) ast_declaration($2, NULL, NULL);
decl->set_location(@2);
$$ = new(ctx) ast_declarator_list(NULL);
$$->set_location_range(@1, @2);
$$->invariant = true;
$$->declarations.push_tail(&decl->link);
}
| PRECISE variable_identifier
{
void *ctx = state;
ast_declaration *decl = new(ctx) ast_declaration($2, NULL, NULL);
decl->set_location(@2);
$$ = new(ctx) ast_declarator_list(NULL);
$$->set_location_range(@1, @2);
$$->precise = true;
$$->declarations.push_tail(&decl->link);
}
;
fully_specified_type:
type_specifier
{
void *ctx = state;
$$ = new(ctx) ast_fully_specified_type();
$$->set_location(@1);
$$->specifier = $1;
}
| type_qualifier type_specifier
{
void *ctx = state;
$$ = new(ctx) ast_fully_specified_type();
$$->set_location_range(@1, @2);
$$->qualifier = $1;
$$->specifier = $2;
}
;
layout_qualifier:
LAYOUT_TOK '(' layout_qualifier_id_list ')'
{
$$ = $3;
}
;
layout_qualifier_id_list:
layout_qualifier_id
| layout_qualifier_id_list ',' layout_qualifier_id
{
$$ = $1;
if (!$$.merge_qualifier(& @3, state, $3)) {
YYERROR;
}
}
;
integer_constant:
INTCONSTANT { $$ = $1; }
| UINTCONSTANT { $$ = $1; }
;
layout_qualifier_id:
any_identifier
{
memset(& $$, 0, sizeof($$));
/* Layout qualifiers for ARB_fragment_coord_conventions. */
if (!$$.flags.i && (state->ARB_fragment_coord_conventions_enable ||
state->is_version(150, 0))) {
if (match_layout_qualifier($1, "origin_upper_left", state) == 0) {
$$.flags.q.origin_upper_left = 1;
} else if (match_layout_qualifier($1, "pixel_center_integer",
state) == 0) {
$$.flags.q.pixel_center_integer = 1;
}
if ($$.flags.i && state->ARB_fragment_coord_conventions_warn) {
_mesa_glsl_warning(& @1, state,
"GL_ARB_fragment_coord_conventions layout "
"identifier `%s' used", $1);
}
}
/* Layout qualifiers for AMD/ARB_conservative_depth. */
if (!$$.flags.i &&
(state->AMD_conservative_depth_enable ||
state->ARB_conservative_depth_enable)) {
if (match_layout_qualifier($1, "depth_any", state) == 0) {
$$.flags.q.depth_any = 1;
} else if (match_layout_qualifier($1, "depth_greater", state) == 0) {
$$.flags.q.depth_greater = 1;
} else if (match_layout_qualifier($1, "depth_less", state) == 0) {
$$.flags.q.depth_less = 1;
} else if (match_layout_qualifier($1, "depth_unchanged",
state) == 0) {
$$.flags.q.depth_unchanged = 1;
}
if ($$.flags.i && state->AMD_conservative_depth_warn) {
_mesa_glsl_warning(& @1, state,
"GL_AMD_conservative_depth "
"layout qualifier `%s' is used", $1);
}
if ($$.flags.i && state->ARB_conservative_depth_warn) {
_mesa_glsl_warning(& @1, state,
"GL_ARB_conservative_depth "
"layout qualifier `%s' is used", $1);
}
}
/* See also interface_block_layout_qualifier. */
if (!$$.flags.i && state->has_uniform_buffer_objects()) {
if (match_layout_qualifier($1, "std140", state) == 0) {
$$.flags.q.std140 = 1;
} else if (match_layout_qualifier($1, "shared", state) == 0) {
$$.flags.q.shared = 1;
} else if (match_layout_qualifier($1, "column_major", state) == 0) {
$$.flags.q.column_major = 1;
/* "row_major" is a reserved word in GLSL 1.30+. Its token is parsed
* below in the interface_block_layout_qualifier rule.
*
* It is not a reserved word in GLSL ES 3.00, so it's handled here as
* an identifier.
*
* Also, this takes care of alternate capitalizations of
* "row_major" (which is necessary because layout qualifiers
* are case-insensitive in desktop GLSL).
*/
} else if (match_layout_qualifier($1, "row_major", state) == 0) {
$$.flags.q.row_major = 1;
/* "packed" is a reserved word in GLSL, and its token is
* parsed below in the interface_block_layout_qualifier rule.
* However, we must take care of alternate capitalizations of
* "packed", because layout qualifiers are case-insensitive
* in desktop GLSL.
*/
} else if (match_layout_qualifier($1, "packed", state) == 0) {
$$.flags.q.packed = 1;
}
if ($$.flags.i && state->ARB_uniform_buffer_object_warn) {
_mesa_glsl_warning(& @1, state,
"#version 140 / GL_ARB_uniform_buffer_object "
"layout qualifier `%s' is used", $1);
}
}
/* Layout qualifiers for GLSL 1.50 geometry shaders. */
if (!$$.flags.i) {
static const struct {
const char *s;
GLenum e;
} map[] = {
{ "points", GL_POINTS },
{ "lines", GL_LINES },
{ "lines_adjacency", GL_LINES_ADJACENCY },
{ "line_strip", GL_LINE_STRIP },
{ "triangles", GL_TRIANGLES },
{ "triangles_adjacency", GL_TRIANGLES_ADJACENCY },
{ "triangle_strip", GL_TRIANGLE_STRIP },
};
for (unsigned i = 0; i < ARRAY_SIZE(map); i++) {
if (match_layout_qualifier($1, map[i].s, state) == 0) {
$$.flags.q.prim_type = 1;
$$.prim_type = map[i].e;
break;
}
}
if ($$.flags.i && !state->is_version(150, 0)) {
_mesa_glsl_error(& @1, state, "#version 150 layout "
"qualifier `%s' used", $1);
}
}
/* Layout qualifiers for ARB_shader_image_load_store. */
if (state->ARB_shader_image_load_store_enable ||
state->is_version(420, 0)) {
if (!$$.flags.i) {
static const struct {
const char *name;
GLenum format;
glsl_base_type base_type;
} map[] = {
{ "rgba32f", GL_RGBA32F, GLSL_TYPE_FLOAT },
{ "rgba16f", GL_RGBA16F, GLSL_TYPE_FLOAT },
{ "rg32f", GL_RG32F, GLSL_TYPE_FLOAT },
{ "rg16f", GL_RG16F, GLSL_TYPE_FLOAT },
{ "r11f_g11f_b10f", GL_R11F_G11F_B10F, GLSL_TYPE_FLOAT },
{ "r32f", GL_R32F, GLSL_TYPE_FLOAT },
{ "r16f", GL_R16F, GLSL_TYPE_FLOAT },
{ "rgba32ui", GL_RGBA32UI, GLSL_TYPE_UINT },
{ "rgba16ui", GL_RGBA16UI, GLSL_TYPE_UINT },
{ "rgb10_a2ui", GL_RGB10_A2UI, GLSL_TYPE_UINT },
{ "rgba8ui", GL_RGBA8UI, GLSL_TYPE_UINT },
{ "rg32ui", GL_RG32UI, GLSL_TYPE_UINT },
{ "rg16ui", GL_RG16UI, GLSL_TYPE_UINT },
{ "rg8ui", GL_RG8UI, GLSL_TYPE_UINT },
{ "r32ui", GL_R32UI, GLSL_TYPE_UINT },
{ "r16ui", GL_R16UI, GLSL_TYPE_UINT },
{ "r8ui", GL_R8UI, GLSL_TYPE_UINT },
{ "rgba32i", GL_RGBA32I, GLSL_TYPE_INT },
{ "rgba16i", GL_RGBA16I, GLSL_TYPE_INT },
{ "rgba8i", GL_RGBA8I, GLSL_TYPE_INT },
{ "rg32i", GL_RG32I, GLSL_TYPE_INT },
{ "rg16i", GL_RG16I, GLSL_TYPE_INT },
{ "rg8i", GL_RG8I, GLSL_TYPE_INT },
{ "r32i", GL_R32I, GLSL_TYPE_INT },
{ "r16i", GL_R16I, GLSL_TYPE_INT },
{ "r8i", GL_R8I, GLSL_TYPE_INT },
{ "rgba16", GL_RGBA16, GLSL_TYPE_FLOAT },
{ "rgb10_a2", GL_RGB10_A2, GLSL_TYPE_FLOAT },
{ "rgba8", GL_RGBA8, GLSL_TYPE_FLOAT },
{ "rg16", GL_RG16, GLSL_TYPE_FLOAT },
{ "rg8", GL_RG8, GLSL_TYPE_FLOAT },
{ "r16", GL_R16, GLSL_TYPE_FLOAT },
{ "r8", GL_R8, GLSL_TYPE_FLOAT },
{ "rgba16_snorm", GL_RGBA16_SNORM, GLSL_TYPE_FLOAT },
{ "rgba8_snorm", GL_RGBA8_SNORM, GLSL_TYPE_FLOAT },
{ "rg16_snorm", GL_RG16_SNORM, GLSL_TYPE_FLOAT },
{ "rg8_snorm", GL_RG8_SNORM, GLSL_TYPE_FLOAT },
{ "r16_snorm", GL_R16_SNORM, GLSL_TYPE_FLOAT },
{ "r8_snorm", GL_R8_SNORM, GLSL_TYPE_FLOAT }
};
for (unsigned i = 0; i < ARRAY_SIZE(map); i++) {
if (match_layout_qualifier($1, map[i].name, state) == 0) {
$$.flags.q.explicit_image_format = 1;
$$.image_format = map[i].format;
$$.image_base_type = map[i].base_type;
break;
}
}
}
if (!$$.flags.i &&
match_layout_qualifier($1, "early_fragment_tests", state) == 0) {
/* From section 4.4.1.3 of the GLSL 4.50 specification
* (Fragment Shader Inputs):
*
* "Fragment shaders also allow the following layout
* qualifier on in only (not with variable declarations)
* layout-qualifier-id
* early_fragment_tests
* [...]"
*/
if (state->stage != MESA_SHADER_FRAGMENT) {
_mesa_glsl_error(& @1, state,
"early_fragment_tests layout qualifier only "
"valid in fragment shaders");
}
$$.flags.q.early_fragment_tests = 1;
}
}
if (!$$.flags.i) {
_mesa_glsl_error(& @1, state, "unrecognized layout identifier "
"`%s'", $1);
YYERROR;
}
}
| any_identifier '=' integer_constant
{
memset(& $$, 0, sizeof($$));
if (match_layout_qualifier("location", $1, state) == 0) {
$$.flags.q.explicit_location = 1;
if ($$.flags.q.attribute == 1 &&
state->ARB_explicit_attrib_location_warn) {
_mesa_glsl_warning(& @1, state,
"GL_ARB_explicit_attrib_location layout "
"identifier `%s' used", $1);
}
if ($3 >= 0) {
$$.location = $3;
} else {
_mesa_glsl_error(& @3, state, "invalid location %d specified", $3);
YYERROR;
}
}
if (match_layout_qualifier("index", $1, state) == 0) {
$$.flags.q.explicit_index = 1;
if ($3 >= 0) {
$$.index = $3;
} else {
_mesa_glsl_error(& @3, state, "invalid index %d specified", $3);
YYERROR;
}
}
if ((state->ARB_shading_language_420pack_enable ||
state->has_atomic_counters()) &&
match_layout_qualifier("binding", $1, state) == 0) {
$$.flags.q.explicit_binding = 1;
$$.binding = $3;
}
if (state->has_atomic_counters() &&
match_layout_qualifier("offset", $1, state) == 0) {
$$.flags.q.explicit_offset = 1;
$$.offset = $3;
}
if (match_layout_qualifier("max_vertices", $1, state) == 0) {
$$.flags.q.max_vertices = 1;
if ($3 < 0) {
_mesa_glsl_error(& @3, state,
"invalid max_vertices %d specified", $3);
YYERROR;
} else {
$$.max_vertices = $3;
if (!state->is_version(150, 0)) {
_mesa_glsl_error(& @3, state,
"#version 150 max_vertices qualifier "
"specified", $3);
}
}
}
if (state->stage == MESA_SHADER_GEOMETRY) {
if (match_layout_qualifier("stream", $1, state) == 0 &&
state->check_explicit_attrib_stream_allowed(& @3)) {
$$.flags.q.stream = 1;
if ($3 < 0) {
_mesa_glsl_error(& @3, state,
"invalid stream %d specified", $3);
YYERROR;
} else {
$$.flags.q.explicit_stream = 1;
$$.stream = $3;
}
}
}
static const char * const local_size_qualifiers[3] = {
"local_size_x",
"local_size_y",
"local_size_z",
};
for (int i = 0; i < 3; i++) {
if (match_layout_qualifier(local_size_qualifiers[i], $1,
state) == 0) {
if ($3 <= 0) {
_mesa_glsl_error(& @3, state,
"invalid %s of %d specified",
local_size_qualifiers[i], $3);
YYERROR;
} else if (!state->is_version(430, 0) &&
!state->ARB_compute_shader_enable) {
_mesa_glsl_error(& @3, state,
"%s qualifier requires GLSL 4.30 or "
"ARB_compute_shader",
local_size_qualifiers[i]);
YYERROR;
} else {
$$.flags.q.local_size |= (1 << i);
$$.local_size[i] = $3;
}
break;
}
}
if (match_layout_qualifier("invocations", $1, state) == 0) {
$$.flags.q.invocations = 1;
if ($3 <= 0) {
_mesa_glsl_error(& @3, state,
"invalid invocations %d specified", $3);
YYERROR;
} else if ($3 > MAX_GEOMETRY_SHADER_INVOCATIONS) {
_mesa_glsl_error(& @3, state,
"invocations (%d) exceeds "
"GL_MAX_GEOMETRY_SHADER_INVOCATIONS", $3);
YYERROR;
} else {
$$.invocations = $3;
if (!state->is_version(400, 0) &&
!state->ARB_gpu_shader5_enable) {
_mesa_glsl_error(& @3, state,
"GL_ARB_gpu_shader5 invocations "
"qualifier specified", $3);
}
}
}
/* If the identifier didn't match any known layout identifiers,
* emit an error.
*/
if (!$$.flags.i) {
_mesa_glsl_error(& @1, state, "unrecognized layout identifier "
"`%s'", $1);
YYERROR;
}
}
| interface_block_layout_qualifier
{
$$ = $1;
/* Layout qualifiers for ARB_uniform_buffer_object. */
if ($$.flags.q.uniform && !state->has_uniform_buffer_objects()) {
_mesa_glsl_error(& @1, state,
"#version 140 / GL_ARB_uniform_buffer_object "
"layout qualifier `%s' is used", $1);
} else if ($$.flags.q.uniform && state->ARB_uniform_buffer_object_warn) {
_mesa_glsl_warning(& @1, state,
"#version 140 / GL_ARB_uniform_buffer_object "
"layout qualifier `%s' is used", $1);
}
}
;
/* This is a separate language rule because we parse these as tokens
* (due to them being reserved keywords) instead of identifiers like
* most qualifiers. See the any_identifier path of
* layout_qualifier_id for the others.
*
* Note that since layout qualifiers are case-insensitive in desktop
* GLSL, all of these qualifiers need to be handled as identifiers as
* well (by the any_identifier path of layout_qualifier_id).
*/
interface_block_layout_qualifier:
ROW_MAJOR
{
memset(& $$, 0, sizeof($$));
$$.flags.q.row_major = 1;
}
| PACKED_TOK
{
memset(& $$, 0, sizeof($$));
$$.flags.q.packed = 1;
}
;
interpolation_qualifier:
SMOOTH
{
memset(& $$, 0, sizeof($$));
$$.flags.q.smooth = 1;
}
| FLAT
{
memset(& $$, 0, sizeof($$));
$$.flags.q.flat = 1;
}
| NOPERSPECTIVE
{
memset(& $$, 0, sizeof($$));
$$.flags.q.noperspective = 1;
}
;
type_qualifier:
/* Single qualifiers */
INVARIANT
{
memset(& $$, 0, sizeof($$));
$$.flags.q.invariant = 1;
}
| PRECISE
{
memset(& $$, 0, sizeof($$));
$$.flags.q.precise = 1;
}
| auxiliary_storage_qualifier
| storage_qualifier
| interpolation_qualifier
| layout_qualifier
| memory_qualifier
| precision_qualifier
{
memset(&$$, 0, sizeof($$));
$$.precision = $1;
}
/* Multiple qualifiers:
* In GLSL 4.20, these can be specified in any order. In earlier versions,
* they appear in this order (see GLSL 1.50 section 4.7 & comments below):
*
* invariant interpolation auxiliary storage precision ...or...
* layout storage precision
*
* Each qualifier's rule ensures that the accumulated qualifiers on the right
* side don't contain any that must appear on the left hand side.
* For example, when processing a storage qualifier, we check that there are
* no auxiliary, interpolation, layout, invariant, or precise qualifiers to the right.
*/
| PRECISE type_qualifier
{
if ($2.flags.q.precise)
_mesa_glsl_error(&@1, state, "duplicate \"precise\" qualifier");
$$ = $2;
$$.flags.q.precise = 1;
}
| INVARIANT type_qualifier
{
if ($2.flags.q.invariant)
_mesa_glsl_error(&@1, state, "duplicate \"invariant\" qualifier");
if (!state->ARB_shading_language_420pack_enable && $2.flags.q.precise)
_mesa_glsl_error(&@1, state,
"\"invariant\" must come after \"precise\"");
$$ = $2;
$$.flags.q.invariant = 1;
/* GLSL ES 3.00 spec, section 4.6.1 "The Invariant Qualifier":
*
* "Only variables output from a shader can be candidates for invariance.
* This includes user-defined output variables and the built-in output
* variables. As only outputs can be declared as invariant, an invariant
* output from one shader stage will still match an input of a subsequent
* stage without the input being declared as invariant."
*/
if (state->es_shader && state->language_version >= 300 && $$.flags.q.in)
_mesa_glsl_error(&@1, state, "invariant qualifiers cannot be used with shader inputs");
}
| interpolation_qualifier type_qualifier
{
/* Section 4.3 of the GLSL 1.40 specification states:
* "...qualified with one of these interpolation qualifiers"
*
* GLSL 1.30 claims to allow "one or more", but insists that:
* "These interpolation qualifiers may only precede the qualifiers in,
* centroid in, out, or centroid out in a declaration."
*
* ...which means that e.g. smooth can't precede smooth, so there can be
* only one after all, and the 1.40 text is a clarification, not a change.
*/
if ($2.has_interpolation())
_mesa_glsl_error(&@1, state, "duplicate interpolation qualifier");
if (!state->ARB_shading_language_420pack_enable &&
($2.flags.q.precise || $2.flags.q.invariant)) {
_mesa_glsl_error(&@1, state, "interpolation qualifiers must come "
"after \"precise\" or \"invariant\"");
}
$$ = $1;
$$.merge_qualifier(&@1, state, $2);
}
| layout_qualifier type_qualifier
{
/* In the absence of ARB_shading_language_420pack, layout qualifiers may
* appear no later than auxiliary storage qualifiers. There is no
* particularly clear spec language mandating this, but in all examples
* the layout qualifier precedes the storage qualifier.
*
* We allow combinations of layout with interpolation, invariant or
* precise qualifiers since these are useful in ARB_separate_shader_objects.
* There is no clear spec guidance on this either.
*/
if (!state->ARB_shading_language_420pack_enable && $2.has_layout())
_mesa_glsl_error(&@1, state, "duplicate layout(...) qualifiers");
$$ = $1;
$$.merge_qualifier(&@1, state, $2);
}
| auxiliary_storage_qualifier type_qualifier
{
if ($2.has_auxiliary_storage()) {
_mesa_glsl_error(&@1, state,
"duplicate auxiliary storage qualifier (centroid or sample)");
}
if (!state->ARB_shading_language_420pack_enable &&
($2.flags.q.precise || $2.flags.q.invariant ||
$2.has_interpolation() || $2.has_layout())) {
_mesa_glsl_error(&@1, state, "auxiliary storage qualifiers must come "
"just before storage qualifiers");
}
$$ = $1;
$$.merge_qualifier(&@1, state, $2);
}
| storage_qualifier type_qualifier
{
/* Section 4.3 of the GLSL 1.20 specification states:
* "Variable declarations may have a storage qualifier specified..."
* 1.30 clarifies this to "may have one storage qualifier".
*/
if ($2.has_storage())
_mesa_glsl_error(&@1, state, "duplicate storage qualifier");
if (!state->ARB_shading_language_420pack_enable &&
($2.flags.q.precise || $2.flags.q.invariant || $2.has_interpolation() ||
$2.has_layout() || $2.has_auxiliary_storage())) {
_mesa_glsl_error(&@1, state, "storage qualifiers must come after "
"precise, invariant, interpolation, layout and auxiliary "
"storage qualifiers");
}
$$ = $1;
$$.merge_qualifier(&@1, state, $2);
}
| precision_qualifier type_qualifier
{
if ($2.precision != ast_precision_none)
_mesa_glsl_error(&@1, state, "duplicate precision qualifier");
if (!state->ARB_shading_language_420pack_enable && $2.flags.i != 0)
_mesa_glsl_error(&@1, state, "precision qualifiers must come last");
$$ = $2;
$$.precision = $1;
}
| memory_qualifier type_qualifier
{
$$ = $1;
$$.merge_qualifier(&@1, state, $2);
}
;
auxiliary_storage_qualifier:
CENTROID
{
memset(& $$, 0, sizeof($$));
$$.flags.q.centroid = 1;
}
| SAMPLE
{
memset(& $$, 0, sizeof($$));
$$.flags.q.sample = 1;
}
/* TODO: "patch" also goes here someday. */
storage_qualifier:
CONST_TOK
{
memset(& $$, 0, sizeof($$));
$$.flags.q.constant = 1;
}
| ATTRIBUTE
{
memset(& $$, 0, sizeof($$));
$$.flags.q.attribute = 1;
}
| VARYING
{
memset(& $$, 0, sizeof($$));
$$.flags.q.varying = 1;
}
| IN_TOK
{
memset(& $$, 0, sizeof($$));
$$.flags.q.in = 1;
}
| OUT_TOK
{
memset(& $$, 0, sizeof($$));
$$.flags.q.out = 1;
if (state->stage == MESA_SHADER_GEOMETRY &&
state->has_explicit_attrib_stream()) {
/* Section 4.3.8.2 (Output Layout Qualifiers) of the GLSL 4.00
* spec says:
*
* "If the block or variable is declared with the stream
* identifier, it is associated with the specified stream;
* otherwise, it is associated with the current default stream."
*/
$$.flags.q.stream = 1;
$$.flags.q.explicit_stream = 0;
$$.stream = state->out_qualifier->stream;
}
}
| UNIFORM
{
memset(& $$, 0, sizeof($$));
$$.flags.q.uniform = 1;
}
;
memory_qualifier:
COHERENT
{
memset(& $$, 0, sizeof($$));
$$.flags.q.coherent = 1;
}
| VOLATILE
{
memset(& $$, 0, sizeof($$));
$$.flags.q._volatile = 1;
}
| RESTRICT
{
STATIC_ASSERT(sizeof($$.flags.q) <= sizeof($$.flags.i));
memset(& $$, 0, sizeof($$));
$$.flags.q.restrict_flag = 1;
}
| READONLY
{
memset(& $$, 0, sizeof($$));
$$.flags.q.read_only = 1;
}
| WRITEONLY
{
memset(& $$, 0, sizeof($$));
$$.flags.q.write_only = 1;
}
;
array_specifier:
'[' ']'
{
void *ctx = state;
$$ = new(ctx) ast_array_specifier(@1);
$$->set_location_range(@1, @2);
}
| '[' constant_expression ']'
{
void *ctx = state;
$$ = new(ctx) ast_array_specifier(@1, $2);
$$->set_location_range(@1, @3);
}
| array_specifier '[' ']'
{
$$ = $1;
if (!state->ARB_arrays_of_arrays_enable) {
_mesa_glsl_error(& @1, state,
"GL_ARB_arrays_of_arrays "
"required for defining arrays of arrays");
} else {
_mesa_glsl_error(& @1, state,
"only the outermost array dimension can "
"be unsized");
}
}
| array_specifier '[' constant_expression ']'
{
$$ = $1;
if (!state->ARB_arrays_of_arrays_enable) {
_mesa_glsl_error(& @1, state,
"GL_ARB_arrays_of_arrays "
"required for defining arrays of arrays");
}
$$->add_dimension($3);
}
;
type_specifier:
type_specifier_nonarray
| type_specifier_nonarray array_specifier
{
$$ = $1;
$$->array_specifier = $2;
}
;
type_specifier_nonarray:
basic_type_specifier_nonarray
{
void *ctx = state;
$$ = new(ctx) ast_type_specifier($1);
$$->set_location(@1);
}
| struct_specifier
{
void *ctx = state;
$$ = new(ctx) ast_type_specifier($1);
$$->set_location(@1);
}
| TYPE_IDENTIFIER
{
void *ctx = state;
$$ = new(ctx) ast_type_specifier($1);
$$->set_location(@1);
}
;
basic_type_specifier_nonarray:
VOID_TOK { $$ = "void"; }
| FLOAT_TOK { $$ = "float"; }
| DOUBLE_TOK { $$ = "double"; }
| INT_TOK { $$ = "int"; }
| UINT_TOK { $$ = "uint"; }
| BOOL_TOK { $$ = "bool"; }
| VEC2 { $$ = "vec2"; }
| VEC3 { $$ = "vec3"; }
| VEC4 { $$ = "vec4"; }
| BVEC2 { $$ = "bvec2"; }
| BVEC3 { $$ = "bvec3"; }
| BVEC4 { $$ = "bvec4"; }
| IVEC2 { $$ = "ivec2"; }
| IVEC3 { $$ = "ivec3"; }
| IVEC4 { $$ = "ivec4"; }
| UVEC2 { $$ = "uvec2"; }
| UVEC3 { $$ = "uvec3"; }
| UVEC4 { $$ = "uvec4"; }
| DVEC2 { $$ = "dvec2"; }
| DVEC3 { $$ = "dvec3"; }
| DVEC4 { $$ = "dvec4"; }
| MAT2X2 { $$ = "mat2"; }
| MAT2X3 { $$ = "mat2x3"; }
| MAT2X4 { $$ = "mat2x4"; }
| MAT3X2 { $$ = "mat3x2"; }
| MAT3X3 { $$ = "mat3"; }
| MAT3X4 { $$ = "mat3x4"; }
| MAT4X2 { $$ = "mat4x2"; }
| MAT4X3 { $$ = "mat4x3"; }
| MAT4X4 { $$ = "mat4"; }
| DMAT2X2 { $$ = "dmat2"; }
| DMAT2X3 { $$ = "dmat2x3"; }
| DMAT2X4 { $$ = "dmat2x4"; }
| DMAT3X2 { $$ = "dmat3x2"; }
| DMAT3X3 { $$ = "dmat3"; }
| DMAT3X4 { $$ = "dmat3x4"; }
| DMAT4X2 { $$ = "dmat4x2"; }
| DMAT4X3 { $$ = "dmat4x3"; }
| DMAT4X4 { $$ = "dmat4"; }
| SAMPLER1D { $$ = "sampler1D"; }
| SAMPLER2D { $$ = "sampler2D"; }
| SAMPLER2DRECT { $$ = "sampler2DRect"; }
| SAMPLER3D { $$ = "sampler3D"; }
| SAMPLERCUBE { $$ = "samplerCube"; }
| SAMPLEREXTERNALOES { $$ = "samplerExternalOES"; }
| SAMPLER1DSHADOW { $$ = "sampler1DShadow"; }
| SAMPLER2DSHADOW { $$ = "sampler2DShadow"; }
| SAMPLER2DRECTSHADOW { $$ = "sampler2DRectShadow"; }
| SAMPLERCUBESHADOW { $$ = "samplerCubeShadow"; }
| SAMPLER1DARRAY { $$ = "sampler1DArray"; }
| SAMPLER2DARRAY { $$ = "sampler2DArray"; }
| SAMPLER1DARRAYSHADOW { $$ = "sampler1DArrayShadow"; }
| SAMPLER2DARRAYSHADOW { $$ = "sampler2DArrayShadow"; }
| SAMPLERBUFFER { $$ = "samplerBuffer"; }
| SAMPLERCUBEARRAY { $$ = "samplerCubeArray"; }
| SAMPLERCUBEARRAYSHADOW { $$ = "samplerCubeArrayShadow"; }
| ISAMPLER1D { $$ = "isampler1D"; }
| ISAMPLER2D { $$ = "isampler2D"; }
| ISAMPLER2DRECT { $$ = "isampler2DRect"; }
| ISAMPLER3D { $$ = "isampler3D"; }
| ISAMPLERCUBE { $$ = "isamplerCube"; }
| ISAMPLER1DARRAY { $$ = "isampler1DArray"; }
| ISAMPLER2DARRAY { $$ = "isampler2DArray"; }
| ISAMPLERBUFFER { $$ = "isamplerBuffer"; }
| ISAMPLERCUBEARRAY { $$ = "isamplerCubeArray"; }
| USAMPLER1D { $$ = "usampler1D"; }
| USAMPLER2D { $$ = "usampler2D"; }
| USAMPLER2DRECT { $$ = "usampler2DRect"; }
| USAMPLER3D { $$ = "usampler3D"; }
| USAMPLERCUBE { $$ = "usamplerCube"; }
| USAMPLER1DARRAY { $$ = "usampler1DArray"; }
| USAMPLER2DARRAY { $$ = "usampler2DArray"; }
| USAMPLERBUFFER { $$ = "usamplerBuffer"; }
| USAMPLERCUBEARRAY { $$ = "usamplerCubeArray"; }
| SAMPLER2DMS { $$ = "sampler2DMS"; }
| ISAMPLER2DMS { $$ = "isampler2DMS"; }
| USAMPLER2DMS { $$ = "usampler2DMS"; }
| SAMPLER2DMSARRAY { $$ = "sampler2DMSArray"; }
| ISAMPLER2DMSARRAY { $$ = "isampler2DMSArray"; }
| USAMPLER2DMSARRAY { $$ = "usampler2DMSArray"; }
| IMAGE1D { $$ = "image1D"; }
| IMAGE2D { $$ = "image2D"; }
| IMAGE3D { $$ = "image3D"; }
| IMAGE2DRECT { $$ = "image2DRect"; }
| IMAGECUBE { $$ = "imageCube"; }
| IMAGEBUFFER { $$ = "imageBuffer"; }
| IMAGE1DARRAY { $$ = "image1DArray"; }
| IMAGE2DARRAY { $$ = "image2DArray"; }
| IMAGECUBEARRAY { $$ = "imageCubeArray"; }
| IMAGE2DMS { $$ = "image2DMS"; }
| IMAGE2DMSARRAY { $$ = "image2DMSArray"; }
| IIMAGE1D { $$ = "iimage1D"; }
| IIMAGE2D { $$ = "iimage2D"; }
| IIMAGE3D { $$ = "iimage3D"; }
| IIMAGE2DRECT { $$ = "iimage2DRect"; }
| IIMAGECUBE { $$ = "iimageCube"; }
| IIMAGEBUFFER { $$ = "iimageBuffer"; }
| IIMAGE1DARRAY { $$ = "iimage1DArray"; }
| IIMAGE2DARRAY { $$ = "iimage2DArray"; }
| IIMAGECUBEARRAY { $$ = "iimageCubeArray"; }
| IIMAGE2DMS { $$ = "iimage2DMS"; }
| IIMAGE2DMSARRAY { $$ = "iimage2DMSArray"; }
| UIMAGE1D { $$ = "uimage1D"; }
| UIMAGE2D { $$ = "uimage2D"; }
| UIMAGE3D { $$ = "uimage3D"; }
| UIMAGE2DRECT { $$ = "uimage2DRect"; }
| UIMAGECUBE { $$ = "uimageCube"; }
| UIMAGEBUFFER { $$ = "uimageBuffer"; }
| UIMAGE1DARRAY { $$ = "uimage1DArray"; }
| UIMAGE2DARRAY { $$ = "uimage2DArray"; }
| UIMAGECUBEARRAY { $$ = "uimageCubeArray"; }
| UIMAGE2DMS { $$ = "uimage2DMS"; }
| UIMAGE2DMSARRAY { $$ = "uimage2DMSArray"; }
| ATOMIC_UINT { $$ = "atomic_uint"; }
;
precision_qualifier:
HIGHP
{
state->check_precision_qualifiers_allowed(&@1);
$$ = ast_precision_high;
}
| MEDIUMP
{
state->check_precision_qualifiers_allowed(&@1);
$$ = ast_precision_medium;
}
| LOWP
{
state->check_precision_qualifiers_allowed(&@1);
$$ = ast_precision_low;
}
;
struct_specifier:
STRUCT any_identifier '{' struct_declaration_list '}'
{
void *ctx = state;
$$ = new(ctx) ast_struct_specifier($2, $4);
$$->set_location_range(@2, @5);
state->symbols->add_type($2, glsl_type::void_type);
}
| STRUCT '{' struct_declaration_list '}'
{
void *ctx = state;
$$ = new(ctx) ast_struct_specifier(NULL, $3);
$$->set_location_range(@2, @4);
}
;
struct_declaration_list:
struct_declaration
{
$$ = $1;
$1->link.self_link();
}
| struct_declaration_list struct_declaration
{
$$ = $1;
$$->link.insert_before(& $2->link);
}
;
struct_declaration:
fully_specified_type struct_declarator_list ';'
{
void *ctx = state;
ast_fully_specified_type *const type = $1;
type->set_location(@1);
if (type->qualifier.flags.i != 0)
_mesa_glsl_error(&@1, state,
"only precision qualifiers may be applied to "
"structure members");
$$ = new(ctx) ast_declarator_list(type);
$$->set_location(@2);
$$->declarations.push_degenerate_list_at_head(& $2->link);
}
;
struct_declarator_list:
struct_declarator
{
$$ = $1;
$1->link.self_link();
}
| struct_declarator_list ',' struct_declarator
{
$$ = $1;
$$->link.insert_before(& $3->link);
}
;
struct_declarator:
any_identifier
{
void *ctx = state;
$$ = new(ctx) ast_declaration($1, NULL, NULL);
$$->set_location(@1);
}
| any_identifier array_specifier
{
void *ctx = state;
$$ = new(ctx) ast_declaration($1, $2, NULL);
$$->set_location_range(@1, @2);
}
;
initializer:
assignment_expression
| '{' initializer_list '}'
{
$$ = $2;
}
| '{' initializer_list ',' '}'
{
$$ = $2;
}
;
initializer_list:
initializer
{
void *ctx = state;
$$ = new(ctx) ast_aggregate_initializer();
$$->set_location(@1);
$$->expressions.push_tail(& $1->link);
}
| initializer_list ',' initializer
{
$1->expressions.push_tail(& $3->link);
}
;
declaration_statement:
declaration
;
// Grammar Note: labeled statements for SWITCH only; 'goto' is not
// supported.
statement:
compound_statement { $$ = (ast_node *) $1; }
| simple_statement
;
simple_statement:
declaration_statement
| expression_statement
| selection_statement
| switch_statement
| iteration_statement
| jump_statement
;
compound_statement:
'{' '}'
{
void *ctx = state;
$$ = new(ctx) ast_compound_statement(true, NULL);
$$->set_location_range(@1, @2);
}
| '{'
{
state->symbols->push_scope();
}
statement_list '}'
{
void *ctx = state;
$$ = new(ctx) ast_compound_statement(true, $3);
$$->set_location_range(@1, @4);
state->symbols->pop_scope();
}
;
statement_no_new_scope:
compound_statement_no_new_scope { $$ = (ast_node *) $1; }
| simple_statement
;
compound_statement_no_new_scope:
'{' '}'
{
void *ctx = state;
$$ = new(ctx) ast_compound_statement(false, NULL);
$$->set_location_range(@1, @2);
}
| '{' statement_list '}'
{
void *ctx = state;
$$ = new(ctx) ast_compound_statement(false, $2);
$$->set_location_range(@1, @3);
}
;
statement_list:
statement
{
if ($1 == NULL) {
_mesa_glsl_error(& @1, state, "<nil> statement");
assert($1 != NULL);
}
$$ = $1;
$$->link.self_link();
}
| statement_list statement
{
if ($2 == NULL) {
_mesa_glsl_error(& @2, state, "<nil> statement");
assert($2 != NULL);
}
$$ = $1;
$$->link.insert_before(& $2->link);
}
;
expression_statement:
';'
{
void *ctx = state;
$$ = new(ctx) ast_expression_statement(NULL);
$$->set_location(@1);
}
| expression ';'
{
void *ctx = state;
$$ = new(ctx) ast_expression_statement($1);
$$->set_location(@1);
}
;
selection_statement:
IF '(' expression ')' selection_rest_statement
{
$$ = new(state) ast_selection_statement($3, $5.then_statement,
$5.else_statement);
$$->set_location_range(@1, @5);
}
;
selection_rest_statement:
statement ELSE statement
{
$$.then_statement = $1;
$$.else_statement = $3;
}
| statement %prec THEN
{
$$.then_statement = $1;
$$.else_statement = NULL;
}
;
condition:
expression
{
$$ = (ast_node *) $1;
}
| fully_specified_type any_identifier '=' initializer
{
void *ctx = state;
ast_declaration *decl = new(ctx) ast_declaration($2, NULL, $4);
ast_declarator_list *declarator = new(ctx) ast_declarator_list($1);
decl->set_location_range(@2, @4);
declarator->set_location(@1);
declarator->declarations.push_tail(&decl->link);
$$ = declarator;
}
;
/*
* switch_statement grammar is based on the syntax described in the body
* of the GLSL spec, not in it's appendix!!!
*/
switch_statement:
SWITCH '(' expression ')' switch_body
{
$$ = new(state) ast_switch_statement($3, $5);
$$->set_location_range(@1, @5);
}
;
switch_body:
'{' '}'
{
$$ = new(state) ast_switch_body(NULL);
$$->set_location_range(@1, @2);
}
| '{' case_statement_list '}'
{
$$ = new(state) ast_switch_body($2);
$$->set_location_range(@1, @3);
}
;
case_label:
CASE expression ':'
{
$$ = new(state) ast_case_label($2);
$$->set_location(@2);
}
| DEFAULT ':'
{
$$ = new(state) ast_case_label(NULL);
$$->set_location(@2);
}
;
case_label_list:
case_label
{
ast_case_label_list *labels = new(state) ast_case_label_list();
labels->labels.push_tail(& $1->link);
$$ = labels;
$$->set_location(@1);
}
| case_label_list case_label
{
$$ = $1;
$$->labels.push_tail(& $2->link);
}
;
case_statement:
case_label_list statement
{
ast_case_statement *stmts = new(state) ast_case_statement($1);
stmts->set_location(@2);
stmts->stmts.push_tail(& $2->link);
$$ = stmts;
}
| case_statement statement
{
$$ = $1;
$$->stmts.push_tail(& $2->link);
}
;
case_statement_list:
case_statement
{
ast_case_statement_list *cases= new(state) ast_case_statement_list();
cases->set_location(@1);
cases->cases.push_tail(& $1->link);
$$ = cases;
}
| case_statement_list case_statement
{
$$ = $1;
$$->cases.push_tail(& $2->link);
}
;
iteration_statement:
WHILE '(' condition ')' statement_no_new_scope
{
void *ctx = state;
$$ = new(ctx) ast_iteration_statement(ast_iteration_statement::ast_while,
NULL, $3, NULL, $5);
$$->set_location_range(@1, @4);
}
| DO statement WHILE '(' expression ')' ';'
{
void *ctx = state;
$$ = new(ctx) ast_iteration_statement(ast_iteration_statement::ast_do_while,
NULL, $5, NULL, $2);
$$->set_location_range(@1, @6);
}
| FOR '(' for_init_statement for_rest_statement ')' statement_no_new_scope
{
void *ctx = state;
$$ = new(ctx) ast_iteration_statement(ast_iteration_statement::ast_for,
$3, $4.cond, $4.rest, $6);
$$->set_location_range(@1, @6);
}
;
for_init_statement:
expression_statement
| declaration_statement
;
conditionopt:
condition
| /* empty */
{
$$ = NULL;
}
;
for_rest_statement:
conditionopt ';'
{
$$.cond = $1;
$$.rest = NULL;
}
| conditionopt ';' expression
{
$$.cond = $1;
$$.rest = $3;
}
;
// Grammar Note: No 'goto'. Gotos are not supported.
jump_statement:
CONTINUE ';'
{
void *ctx = state;
$$ = new(ctx) ast_jump_statement(ast_jump_statement::ast_continue, NULL);
$$->set_location(@1);
}
| BREAK ';'
{
void *ctx = state;
$$ = new(ctx) ast_jump_statement(ast_jump_statement::ast_break, NULL);
$$->set_location(@1);
}
| RETURN ';'
{
void *ctx = state;
$$ = new(ctx) ast_jump_statement(ast_jump_statement::ast_return, NULL);
$$->set_location(@1);
}
| RETURN expression ';'
{
void *ctx = state;
$$ = new(ctx) ast_jump_statement(ast_jump_statement::ast_return, $2);
$$->set_location_range(@1, @2);
}
| DISCARD ';' // Fragment shader only.
{
void *ctx = state;
$$ = new(ctx) ast_jump_statement(ast_jump_statement::ast_discard, NULL);
$$->set_location(@1);
}
;
external_declaration:
function_definition { $$ = $1; }
| declaration { $$ = $1; }
| pragma_statement { $$ = NULL; }
| layout_defaults { $$ = $1; }
;
function_definition:
function_prototype compound_statement_no_new_scope
{
void *ctx = state;
$$ = new(ctx) ast_function_definition();
$$->set_location_range(@1, @2);
$$->prototype = $1;
$$->body = $2;
state->symbols->pop_scope();
}
;
/* layout_qualifieropt is packed into this rule */
interface_block:
basic_interface_block
{
$$ = $1;
}
| layout_qualifier basic_interface_block
{
ast_interface_block *block = $2;
if (!block->layout.merge_qualifier(& @1, state, $1)) {
YYERROR;
}
foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
ast_type_qualifier& qualifier = member->type->qualifier;
if (qualifier.flags.q.stream && qualifier.stream != block->layout.stream) {
_mesa_glsl_error(& @1, state,
"stream layout qualifier on "
"interface block member does not match "
"the interface block (%d vs %d)",
qualifier.stream, block->layout.stream);
YYERROR;
}
}
$$ = block;
}
;
basic_interface_block:
interface_qualifier NEW_IDENTIFIER '{' member_list '}' instance_name_opt ';'
{
ast_interface_block *const block = $6;
block->block_name = $2;
block->declarations.push_degenerate_list_at_head(& $4->link);
if ($1.flags.q.uniform) {
if (!state->has_uniform_buffer_objects()) {
_mesa_glsl_error(& @1, state,
"#version 140 / GL_ARB_uniform_buffer_object "
"required for defining uniform blocks");
} else if (state->ARB_uniform_buffer_object_warn) {
_mesa_glsl_warning(& @1, state,
"#version 140 / GL_ARB_uniform_buffer_object "
"required for defining uniform blocks");
}
} else {
if (state->es_shader || state->language_version < 150) {
_mesa_glsl_error(& @1, state,
"#version 150 required for using "
"interface blocks");
}
}
/* From the GLSL 1.50.11 spec, section 4.3.7 ("Interface Blocks"):
* "It is illegal to have an input block in a vertex shader
* or an output block in a fragment shader"
*/
if ((state->stage == MESA_SHADER_VERTEX) && $1.flags.q.in) {
_mesa_glsl_error(& @1, state,
"`in' interface block is not allowed for "
"a vertex shader");
} else if ((state->stage == MESA_SHADER_FRAGMENT) && $1.flags.q.out) {
_mesa_glsl_error(& @1, state,
"`out' interface block is not allowed for "
"a fragment shader");
}
/* Since block arrays require names, and both features are added in
* the same language versions, we don't have to explicitly
* version-check both things.
*/
if (block->instance_name != NULL) {
state->check_version(150, 300, & @1, "interface blocks with "
"an instance name are not allowed");
}
uint64_t interface_type_mask;
struct ast_type_qualifier temp_type_qualifier;
/* Get a bitmask containing only the in/out/uniform flags, allowing us
* to ignore other irrelevant flags like interpolation qualifiers.
*/
temp_type_qualifier.flags.i = 0;
temp_type_qualifier.flags.q.uniform = true;
temp_type_qualifier.flags.q.in = true;
temp_type_qualifier.flags.q.out = true;
interface_type_mask = temp_type_qualifier.flags.i;
/* Get the block's interface qualifier. The interface_qualifier
* production rule guarantees that only one bit will be set (and
* it will be in/out/uniform).
*/
uint64_t block_interface_qualifier = $1.flags.i;
block->layout.flags.i |= block_interface_qualifier;
if (state->stage == MESA_SHADER_GEOMETRY &&
state->has_explicit_attrib_stream()) {
/* Assign global layout's stream value. */
block->layout.flags.q.stream = 1;
block->layout.flags.q.explicit_stream = 0;
block->layout.stream = state->out_qualifier->stream;
}
foreach_list_typed (ast_declarator_list, member, link, &block->declarations) {
ast_type_qualifier& qualifier = member->type->qualifier;
if ((qualifier.flags.i & interface_type_mask) == 0) {
/* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
* "If no optional qualifier is used in a member declaration, the
* qualifier of the variable is just in, out, or uniform as declared
* by interface-qualifier."
*/
qualifier.flags.i |= block_interface_qualifier;
} else if ((qualifier.flags.i & interface_type_mask) !=
block_interface_qualifier) {
/* GLSLangSpec.1.50.11, 4.3.7 (Interface Blocks):
* "If optional qualifiers are used, they can include interpolation
* and storage qualifiers and they must declare an input, output,
* or uniform variable consistent with the interface qualifier of
* the block."
*/
_mesa_glsl_error(& @1, state,
"uniform/in/out qualifier on "
"interface block member does not match "
"the interface block");
}
/* From GLSL ES 3.0, chapter 4.3.7 "Interface Blocks":
*
* "GLSL ES 3.0 does not support interface blocks for shader inputs or
* outputs."
*
* And from GLSL ES 3.0, chapter 4.6.1 "The invariant qualifier":.
*
* "Only variables output from a shader can be candidates for
* invariance."
*
* From GLSL 4.40 and GLSL 1.50, section "Interface Blocks":
*
* "If optional qualifiers are used, they can include interpolation
* qualifiers, auxiliary storage qualifiers, and storage qualifiers
* and they must declare an input, output, or uniform member
* consistent with the interface qualifier of the block"
*/
if (qualifier.flags.q.invariant)
_mesa_glsl_error(&@1, state,
"invariant qualifiers cannot be used "
"with interface blocks members");
}
$$ = block;
}
;
interface_qualifier:
IN_TOK
{
memset(& $$, 0, sizeof($$));
$$.flags.q.in = 1;
}
| OUT_TOK
{
memset(& $$, 0, sizeof($$));
$$.flags.q.out = 1;
}
| UNIFORM
{
memset(& $$, 0, sizeof($$));
$$.flags.q.uniform = 1;
}
;
instance_name_opt:
/* empty */
{
$$ = new(state) ast_interface_block(*state->default_uniform_qualifier,
NULL, NULL);
}
| NEW_IDENTIFIER
{
$$ = new(state) ast_interface_block(*state->default_uniform_qualifier,
$1, NULL);
$$->set_location(@1);
}
| NEW_IDENTIFIER array_specifier
{
$$ = new(state) ast_interface_block(*state->default_uniform_qualifier,
$1, $2);
$$->set_location_range(@1, @2);
}
;
member_list:
member_declaration
{
$$ = $1;
$1->link.self_link();
}
| member_declaration member_list
{
$$ = $1;
$2->link.insert_before(& $$->link);
}
;
member_declaration:
fully_specified_type struct_declarator_list ';'
{
void *ctx = state;
ast_fully_specified_type *type = $1;
type->set_location(@1);
if (type->qualifier.flags.q.attribute) {
_mesa_glsl_error(& @1, state,
"keyword 'attribute' cannot be used with "
"interface block member");
} else if (type->qualifier.flags.q.varying) {
_mesa_glsl_error(& @1, state,
"keyword 'varying' cannot be used with "
"interface block member");
}
$$ = new(ctx) ast_declarator_list(type);
$$->set_location(@2);
$$->declarations.push_degenerate_list_at_head(& $2->link);
}
;
layout_defaults:
layout_qualifier UNIFORM ';'
{
if (!state->default_uniform_qualifier->merge_qualifier(& @1, state, $1)) {
YYERROR;
}
$$ = NULL;
}
| layout_qualifier IN_TOK ';'
{
$$ = NULL;
if (!state->in_qualifier->merge_in_qualifier(& @1, state, $1, $$)) {
YYERROR;
}
}
| layout_qualifier OUT_TOK ';'
{
if (state->stage != MESA_SHADER_GEOMETRY) {
_mesa_glsl_error(& @1, state,
"out layout qualifiers only valid in "
"geometry shaders");
} else {
if ($1.flags.q.prim_type) {
/* Make sure this is a valid output primitive type. */
switch ($1.prim_type) {
case GL_POINTS:
case GL_LINE_STRIP:
case GL_TRIANGLE_STRIP:
break;
default:
_mesa_glsl_error(&@1, state, "invalid geometry shader output "
"primitive type");
break;
}
}
if (!state->out_qualifier->merge_qualifier(& @1, state, $1))
YYERROR;
/* Allow future assigments of global out's stream id value */
state->out_qualifier->flags.q.explicit_stream = 0;
}
$$ = NULL;
}