%{
/*
* 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>
#include <assert.h>
#include "ast.h"
#include "glsl_parser_extras.h"
#include "glsl_types.h"
#include "main/context.h"
#define YYLEX_PARAM state->scanner
#undef yyerror
static void yyerror(YYLTYPE *loc, _mesa_glsl_parse_state *st, const char *msg)
{
_mesa_glsl_error(loc, st, "%s", msg);
}
%}
%pure-parser
%error-verbose
%locations
%initial-action {
@$.first_line = 1;
@$.first_column = 1;
@$.last_line = 1;
@$.last_column = 1;
@$.source = 0;
}
%lex-param {void *scanner}
%parse-param {struct _mesa_glsl_parse_state *state}
%union {
int n;
float real;
const char *identifier;
struct ast_type_qualifier type_qualifier;
ast_node *node;
ast_type_specifier *type_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;
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
%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
%token CENTROID IN_TOK OUT_TOK INOUT_TOK UNIFORM VARYING
%token NOPERSPECTIVE FLAT SMOOTH
%token MAT2X2 MAT2X3 MAT2X4
%token MAT3X2 MAT3X3 MAT3X4
%token MAT4X2 MAT4X3 MAT4X4
%token SAMPLER1D SAMPLER2D SAMPLER3D SAMPLERCUBE SAMPLER1DSHADOW SAMPLER2DSHADOW
%token SAMPLERCUBESHADOW SAMPLER1DARRAY SAMPLER2DARRAY SAMPLER1DARRAYSHADOW
%token SAMPLER2DARRAYSHADOW ISAMPLER1D ISAMPLER2D ISAMPLER3D ISAMPLERCUBE
%token ISAMPLER1DARRAY ISAMPLER2DARRAY USAMPLER1D USAMPLER2D USAMPLER3D
%token USAMPLERCUBE USAMPLER1DARRAY USAMPLER2DARRAY
%token SAMPLER2DRECT ISAMPLER2DRECT USAMPLER2DRECT SAMPLER2DRECTSHADOW
%token SAMPLERBUFFER ISAMPLERBUFFER USAMPLERBUFFER
%token SAMPLEREXTERNALOES
%token STRUCT VOID_TOK WHILE
%token <identifier> IDENTIFIER TYPE_IDENTIFIER NEW_IDENTIFIER
%type <identifier> any_identifier
%token <real> FLOATCONSTANT
%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
%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 VOLATILE PUBLIC_TOK STATIC EXTERN EXTERNAL
%token LONG_TOK SHORT_TOK DOUBLE_TOK HALF FIXED_TOK UNSIGNED INPUT_TOK OUPTUT
%token HVEC2 HVEC3 HVEC4 DVEC2 DVEC3 DVEC4 FVEC2 FVEC3 FVEC4
%token SAMPLER3DRECT
%token SIZEOF CAST NAMESPACE USING
%token ERROR_TOK
%token COMMON PARTITION ACTIVE FILTER
%token IMAGE1D IMAGE2D IMAGE3D IMAGECUBE IMAGE1DARRAY IMAGE2DARRAY
%token IIMAGE1D IIMAGE2D IIMAGE3D IIMAGECUBE IIMAGE1DARRAY IIMAGE2DARRAY
%token UIMAGE1D UIMAGE2D UIMAGE3D UIMAGECUBE UIMAGE1DARRAY UIMAGE2DARRAY
%token IMAGE1DSHADOW IMAGE2DSHADOW IMAGEBUFFER IIMAGEBUFFER UIMAGEBUFFER
%token IMAGE1DARRAYSHADOW IMAGE2DARRAYSHADOW
%token 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> 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> uniform_block_layout_qualifier
%type <type_specifier> type_specifier
%type <type_specifier> type_specifier_no_prec
%type <type_specifier> type_specifier_nonarray
%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_type_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 <node> declaration
%type <node> declaration_statement
%type <node> jump_statement
%type <node> uniform_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
%%
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
{
bool supported = false;
switch ($2) {
case 100:
state->es_shader = true;
supported = state->ctx->API == API_OPENGLES2 ||
state->ctx->Extensions.ARB_ES2_compatibility;
break;
case 110:
case 120:
/* FINISHME: Once the OpenGL 3.0 'forward compatible' context or
* the OpenGL 3.2 Core context is supported, this logic will need
* change. Older versions of GLSL are no longer supported
* outside the compatibility contexts of 3.x.
*/
case 130:
case 140:
case 150:
case 330:
case 400:
case 410:
case 420:
supported = _mesa_is_desktop_gl(state->ctx) &&
((unsigned) $2) <= state->ctx->Const.GLSLVersion;
break;
default:
supported = false;
break;
}
state->language_version = $2;
state->version_string =
ralloc_asprintf(state, "GLSL%s %d.%02d",
state->es_shader ? " ES" : "",
state->language_version / 100,
state->language_version % 100);
if (!supported) {
_mesa_glsl_error(& @2, state, "%s is not supported. "
"Supported versions are: %s\n",
state->version_string,
state->supported_version_string);
}
if (state->language_version >= 140) {
state->ARB_uniform_buffer_object_enable = true;
}
}
;
pragma_statement:
PRAGMA_DEBUG_ON EOL
| PRAGMA_DEBUG_OFF EOL
| PRAGMA_OPTIMIZE_ON EOL
| PRAGMA_OPTIMIZE_OFF EOL
| PRAGMA_INVARIANT_ALL EOL
{
if (state->language_version == 110) {
_mesa_glsl_warning(& @1, state,
"pragma `invariant(all)' not supported in %s",
state->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);
}
;
variable_identifier:
IDENTIFIER
| NEW_IDENTIFIER
;
primary_expression:
variable_identifier
{
void *ctx = state;
$$ = new(ctx) ast_expression(ast_identifier, NULL, NULL, NULL);
$$->set_location(yylloc);
$$->primary_expression.identifier = $1;
}
| INTCONSTANT
{
void *ctx = state;
$$ = new(ctx) ast_expression(ast_int_constant, NULL, NULL, NULL);
$$->set_location(yylloc);
$$->primary_expression.int_constant = $1;
}
| UINTCONSTANT
{
void *ctx = state;
$$ = new(ctx) ast_expression(ast_uint_constant, NULL, NULL, NULL);
$$->set_location(yylloc);
$$->primary_expression.uint_constant = $1;
}
| FLOATCONSTANT
{
void *ctx = state;
$$ = new(ctx) ast_expression(ast_float_constant, NULL, NULL, NULL);
$$->set_location(yylloc);
$$->primary_expression.float_constant = $1;
}
| BOOLCONSTANT
{
void *ctx = state;
$$ = new(ctx) ast_expression(ast_bool_constant, NULL, NULL, NULL);
$$->set_location(yylloc);
$$->primary_expression.bool_constant = $1;
}
| '(' expression ')'
{
$$ = $2;
}
;
postfix_expression:
primary_expression
| postfix_expression '[' integer_expression ']'
{
void *ctx = state;
$$ = new(ctx) ast_expression(ast_array_index, $1, $3, NULL);
$$->set_location(yylloc);
}
| function_call
{
$$ = $1;
}
| postfix_expression '.' any_identifier
{
void *ctx = state;
$$ = new(ctx) ast_expression(ast_field_selection, $1, NULL, NULL);
$$->set_location(yylloc);
$$->primary_expression.identifier = $3;
}
| postfix_expression INC_OP
{
void *ctx = state;
$$ = new(ctx) ast_expression(ast_post_inc, $1, NULL, NULL);
$$->set_location(yylloc);
}
| postfix_expression DEC_OP
{
void *ctx = state;
$$ = new(ctx) ast_expression(ast_post_dec, $1, NULL, NULL);
$$->set_location(yylloc);
}
;
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(yylloc);
}
;
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(yylloc);
$$->expressions.push_tail(& $2->link);
}
| function_call_header_with_parameters ',' assignment_expression
{
$$ = $1;
$$->set_location(yylloc);
$$->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(yylloc);
}
| variable_identifier
{
void *ctx = state;
ast_expression *callee = new(ctx) ast_expression($1);
$$ = new(ctx) ast_function_expression(callee);
$$->set_location(yylloc);
}
| FIELD_SELECTION
{
void *ctx = state;
ast_expression *callee = new(ctx) ast_expression($1);
$$ = new(ctx) ast_function_expression(callee);
$$->set_location(yylloc);
}
;
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(yylloc);
$$->expressions.push_tail(& $2->link);
}
| method_call_header_with_parameters ',' assignment_expression
{
$$ = $1;
$$->set_location(yylloc);
$$->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);
$$ = new(ctx) ast_function_expression(callee);
$$->set_location(yylloc);
}
;
// 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(yylloc);
}
| DEC_OP unary_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression(ast_pre_dec, $2, NULL, NULL);
$$->set_location(yylloc);
}
| unary_operator unary_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression($1, $2, NULL, NULL);
$$->set_location(yylloc);
}
;
// 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(yylloc);
}
| multiplicative_expression '/' unary_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_div, $1, $3);
$$->set_location(yylloc);
}
| multiplicative_expression '%' unary_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_mod, $1, $3);
$$->set_location(yylloc);
}
;
additive_expression:
multiplicative_expression
| additive_expression '+' multiplicative_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_add, $1, $3);
$$->set_location(yylloc);
}
| additive_expression '-' multiplicative_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_sub, $1, $3);
$$->set_location(yylloc);
}
;
shift_expression:
additive_expression
| shift_expression LEFT_OP additive_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_lshift, $1, $3);
$$->set_location(yylloc);
}
| shift_expression RIGHT_OP additive_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_rshift, $1, $3);
$$->set_location(yylloc);
}
;
relational_expression:
shift_expression
| relational_expression '<' shift_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_less, $1, $3);
$$->set_location(yylloc);
}
| relational_expression '>' shift_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_greater, $1, $3);
$$->set_location(yylloc);
}
| relational_expression LE_OP shift_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_lequal, $1, $3);
$$->set_location(yylloc);
}
| relational_expression GE_OP shift_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_gequal, $1, $3);
$$->set_location(yylloc);
}
;
equality_expression:
relational_expression
| equality_expression EQ_OP relational_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_equal, $1, $3);
$$->set_location(yylloc);
}
| equality_expression NE_OP relational_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_nequal, $1, $3);
$$->set_location(yylloc);
}
;
and_expression:
equality_expression
| and_expression '&' equality_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression_bin(ast_bit_and, $1, $3);
$$->set_location(yylloc);
}
;
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(yylloc);
}
;
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(yylloc);
}
;
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(yylloc);
}
;
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(yylloc);
}
;
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(yylloc);
}
;
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(yylloc);
}
;
assignment_expression:
conditional_expression
| unary_expression assignment_operator assignment_expression
{
void *ctx = state;
$$ = new(ctx) ast_expression($2, $1, $3, NULL);
$$->set_location(yylloc);
}
;
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(yylloc);
$$->expressions.push_tail(& $1->link);
} else {
$$ = $1;
}
$$->expressions.push_tail(& $3->link);
}
;
constant_expression:
conditional_expression
;
declaration:
function_prototype ';'
{
state->symbols->pop_scope();
$$ = $1;
}
| init_declarator_list ';'
{
$$ = $1;
}
| PRECISION precision_qualifier type_specifier_no_prec ';'
{
$3->precision = $2;
$3->is_precision_statement = true;
$$ = $3;
}
| uniform_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();
$$->set_location(yylloc);
$$->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();
$$->set_location(yylloc);
$$->type = new(ctx) ast_fully_specified_type();
$$->type->set_location(yylloc);
$$->type->specifier = $1;
$$->identifier = $2;
}
| type_specifier any_identifier '[' constant_expression ']'
{
void *ctx = state;
$$ = new(ctx) ast_parameter_declarator();
$$->set_location(yylloc);
$$->type = new(ctx) ast_fully_specified_type();
$$->type->set_location(yylloc);
$$->type->specifier = $1;
$$->identifier = $2;
$$->is_array = true;
$$->array_size = $4;
}
;
parameter_declaration:
parameter_type_qualifier parameter_qualifier parameter_declarator
{
$1.flags.i |= $2.flags.i;
$$ = $3;
$$->type->qualifier = $1;
}
| parameter_qualifier parameter_declarator
{
$$ = $2;
$$->type->qualifier = $1;
}
| parameter_type_qualifier parameter_qualifier parameter_type_specifier
{
void *ctx = state;
$1.flags.i |= $2.flags.i;
$$ = new(ctx) ast_parameter_declarator();
$$->set_location(yylloc);
$$->type = new(ctx) ast_fully_specified_type();
$$->type->qualifier = $1;
$$->type->specifier = $3;
}
| parameter_qualifier parameter_type_specifier
{
void *ctx = state;
$$ = new(ctx) ast_parameter_declarator();
$$->set_location(yylloc);
$$->type = new(ctx) ast_fully_specified_type();
$$->type->qualifier = $1;
$$->type->specifier = $2;
}
;
parameter_qualifier:
/* empty */
{
memset(& $$, 0, sizeof($$));
}
| IN_TOK
{
memset(& $$, 0, sizeof($$));
$$.flags.q.in = 1;
}
| OUT_TOK
{
memset(& $$, 0, sizeof($$));
$$.flags.q.out = 1;
}
| INOUT_TOK
{
memset(& $$, 0, sizeof($$));
$$.flags.q.in = 1;
$$.flags.q.out = 1;
}
;
parameter_type_specifier:
type_specifier
;
init_declarator_list:
single_declaration
| init_declarator_list ',' any_identifier
{
void *ctx = state;
ast_declaration *decl = new(ctx) ast_declaration($3, false, NULL, NULL);
decl->set_location(yylloc);
$$ = $1;
$$->declarations.push_tail(&decl->link);
state->symbols->add_variable(new(state) ir_variable(NULL, $3, ir_var_auto));
}
| init_declarator_list ',' any_identifier '[' ']'
{
void *ctx = state;
ast_declaration *decl = new(ctx) ast_declaration($3, true, NULL, NULL);
decl->set_location(yylloc);
$$ = $1;
$$->declarations.push_tail(&decl->link);
state->symbols->add_variable(new(state) ir_variable(NULL, $3, ir_var_auto));
}
| init_declarator_list ',' any_identifier '[' constant_expression ']'
{
void *ctx = state;
ast_declaration *decl = new(ctx) ast_declaration($3, true, $5, NULL);
decl->set_location(yylloc);
$$ = $1;
$$->declarations.push_tail(&decl->link);
state->symbols->add_variable(new(state) ir_variable(NULL, $3, ir_var_auto));
}
| init_declarator_list ',' any_identifier '[' ']' '=' initializer
{
void *ctx = state;
ast_declaration *decl = new(ctx) ast_declaration($3, true, NULL, $7);
decl->set_location(yylloc);
$$ = $1;
$$->declarations.push_tail(&decl->link);
state->symbols->add_variable(new(state) ir_variable(NULL, $3, ir_var_auto));
}
| init_declarator_list ',' any_identifier '[' constant_expression ']' '=' initializer
{
void *ctx = state;
ast_declaration *decl = new(ctx) ast_declaration($3, true, $5, $8);
decl->set_location(yylloc);
$$ = $1;
$$->declarations.push_tail(&decl->link);
state->symbols->add_variable(new(state) ir_variable(NULL, $3, ir_var_auto));
}
| init_declarator_list ',' any_identifier '=' initializer
{
void *ctx = state;
ast_declaration *decl = new(ctx) ast_declaration($3, false, NULL, $5);
decl->set_location(yylloc);
$$ = $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);
$$->set_location(yylloc);
}
| fully_specified_type any_identifier
{
void *ctx = state;
ast_declaration *decl = new(ctx) ast_declaration($2, false, NULL, NULL);
$$ = new(ctx) ast_declarator_list($1);
$$->set_location(yylloc);
$$->declarations.push_tail(&decl->link);
}
| fully_specified_type any_identifier '[' ']'
{
void *ctx = state;
ast_declaration *decl = new(ctx) ast_declaration($2, true, NULL, NULL);
$$ = new(ctx) ast_declarator_list($1);
$$->set_location(yylloc);
$$->declarations.push_tail(&decl->link);
}
| fully_specified_type any_identifier '[' constant_expression ']'
{
void *ctx = state;
ast_declaration *decl = new(ctx) ast_declaration($2, true, $4, NULL);
$$ = new(ctx) ast_declarator_list($1);
$$->set_location(yylloc);
$$->declarations.push_tail(&decl->link);
}
| fully_specified_type any_identifier '[' ']' '=' initializer
{
void *ctx = state;
ast_declaration *decl = new(ctx) ast_declaration($2, true, NULL, $6);
$$ = new(ctx) ast_declarator_list($1);
$$->set_location(yylloc);
$$->declarations.push_tail(&decl->link);
}
| fully_specified_type any_identifier '[' constant_expression ']' '=' initializer
{
void *ctx = state;
ast_declaration *decl = new(ctx) ast_declaration($2, true, $4, $7);
$$ = new(ctx) ast_declarator_list($1);
$$->set_location(yylloc);
$$->declarations.push_tail(&decl->link);
}
| fully_specified_type any_identifier '=' initializer
{
void *ctx = state;
ast_declaration *decl = new(ctx) ast_declaration($2, false, NULL, $4);
$$ = new(ctx) ast_declarator_list($1);
$$->set_location(yylloc);
$$->declarations.push_tail(&decl->link);
}
| INVARIANT variable_identifier // Vertex only.
{
void *ctx = state;
ast_declaration *decl = new(ctx) ast_declaration($2, false, NULL, NULL);
$$ = new(ctx) ast_declarator_list(NULL);
$$->set_location(yylloc);
$$->invariant = true;
$$->declarations.push_tail(&decl->link);
}
;
fully_specified_type:
type_specifier
{
void *ctx = state;
$$ = new(ctx) ast_fully_specified_type();
$$->set_location(yylloc);
$$->specifier = $1;
}
| type_qualifier type_specifier
{
void *ctx = state;
$$ = new(ctx) ast_fully_specified_type();
$$->set_location(yylloc);
$$->qualifier = $1;
$$->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 (!$$.merge_qualifier(& @3, state, $3)) {
YYERROR;
}
}
;
layout_qualifier_id:
any_identifier
{
memset(& $$, 0, sizeof($$));
/* Layout qualifiers for ARB_fragment_coord_conventions. */
if (!$$.flags.i && state->ARB_fragment_coord_conventions_enable) {
if (strcmp($1, "origin_upper_left") == 0) {
$$.flags.q.origin_upper_left = 1;
} else if (strcmp($1, "pixel_center_integer") == 0) {
$$.flags.q.pixel_center_integer = 1;
}
if ($$.flags.i && state->ARB_fragment_coord_conventions_warn) {
_mesa_glsl_warning(& @1, state,
"GL_ARB_fragment_coord_conventions layout "
"identifier `%s' used\n", $1);
}
}
/* Layout qualifiers for AMD/ARB_conservative_depth. */
if (!$$.flags.i &&
(state->AMD_conservative_depth_enable ||
state->ARB_conservative_depth_enable)) {
if (strcmp($1, "depth_any") == 0) {
$$.flags.q.depth_any = 1;
} else if (strcmp($1, "depth_greater") == 0) {
$$.flags.q.depth_greater = 1;
} else if (strcmp($1, "depth_less") == 0) {
$$.flags.q.depth_less = 1;
} else if (strcmp($1, "depth_unchanged") == 0) {
$$.flags.q.depth_unchanged = 1;
}
if ($$.flags.i && state->AMD_conservative_depth_warn) {
_mesa_glsl_warning(& @1, state,
"GL_AMD_conservative_depth "
"layout qualifier `%s' is used\n", $1);
}
if ($$.flags.i && state->ARB_conservative_depth_warn) {
_mesa_glsl_warning(& @1, state,
"GL_ARB_conservative_depth "
"layout qualifier `%s' is used\n", $1);
}
}
/* See also uniform_block_layout_qualifier. */
if (!$$.flags.i && state->ARB_uniform_buffer_object_enable) {
if (strcmp($1, "std140") == 0) {
$$.flags.q.std140 = 1;
} else if (strcmp($1, "shared") == 0) {
$$.flags.q.shared = 1;
} else if (strcmp($1, "column_major") == 0) {
$$.flags.q.column_major = 1;
}
if ($$.flags.i && state->ARB_uniform_buffer_object_warn) {
_mesa_glsl_warning(& @1, state,
"#version 140 / GL_ARB_uniform_buffer_object "
"layout qualifier `%s' is used\n", $1);
}
}
if (!$$.flags.i) {
_mesa_glsl_error(& @1, state, "unrecognized layout identifier "
"`%s'\n", $1);
YYERROR;
}
}
| any_identifier '=' INTCONSTANT
{
memset(& $$, 0, sizeof($$));
if (state->ARB_explicit_attrib_location_enable) {
/* FINISHME: Handle 'index' once GL_ARB_blend_func_exteneded and
* FINISHME: GLSL 1.30 (or later) are supported.
*/
if (strcmp("location", $1) == 0) {
$$.flags.q.explicit_location = 1;
if ($3 >= 0) {
$$.location = $3;
} else {
_mesa_glsl_error(& @3, state,
"invalid location %d specified\n", $3);
YYERROR;
}
}
if (strcmp("index", $1) == 0) {
$$.flags.q.explicit_index = 1;
if ($3 >= 0) {
$$.index = $3;
} else {
_mesa_glsl_error(& @3, state,
"invalid index %d specified\n", $3);
YYERROR;
}
}
}
/* If the identifier didn't match any known layout identifiers,
* emit an error.
*/
if (!$$.flags.i) {
_mesa_glsl_error(& @1, state, "unrecognized layout identifier "
"`%s'\n", $1);
YYERROR;
} else if (state->ARB_explicit_attrib_location_warn) {
_mesa_glsl_warning(& @1, state,
"GL_ARB_explicit_attrib_location layout "
"identifier `%s' used\n", $1);
}
}
| uniform_block_layout_qualifier
{
$$ = $1;
/* Layout qualifiers for ARB_uniform_buffer_object. */
if (!state->ARB_uniform_buffer_object_enable) {
_mesa_glsl_error(& @1, state,
"#version 140 / GL_ARB_uniform_buffer_object "
"layout qualifier `%s' is used\n", $1);
} else if (state->ARB_uniform_buffer_object_warn) {
_mesa_glsl_warning(& @1, state,
"#version 140 / GL_ARB_uniform_buffer_object "
"layout qualifier `%s' is used\n", $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.
*/
uniform_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(& $$, 0, sizeof($$));
$$.flags.q.noperspective = 1;
}
;
parameter_type_qualifier:
CONST_TOK
{
memset(& $$, 0, sizeof($$));
$$.flags.q.constant = 1;
}
;
type_qualifier:
storage_qualifier
| layout_qualifier
| layout_qualifier storage_qualifier
{
$$ = $1;
$$.flags.i |= $2.flags.i;
}
| interpolation_qualifier
| interpolation_qualifier storage_qualifier
{
$$ = $1;
$$.flags.i |= $2.flags.i;
}
| INVARIANT storage_qualifier
{
$$ = $2;
$$.flags.q.invariant = 1;
}
| INVARIANT interpolation_qualifier storage_qualifier
{
$$ = $2;
$$.flags.i |= $3.flags.i;
$$.flags.q.invariant = 1;
}
| INVARIANT
{
memset(& $$, 0, sizeof($$));
$$.flags.q.invariant = 1;
}
;
storage_qualifier:
CONST_TOK
{
memset(& $$, 0, sizeof($$));
$$.flags.q.constant = 1;
}
| ATTRIBUTE
{
memset(& $$, 0, sizeof($$));
$$.flags.q.attribute = 1;
}
| VARYING
{
memset(& $$, 0, sizeof($$));
$$.flags.q.varying = 1;
}
| CENTROID VARYING
{
memset(& $$, 0, sizeof($$));
$$.flags.q.centroid = 1;
$$.flags.q.varying = 1;
}
| IN_TOK
{
memset(& $$, 0, sizeof($$));
$$.flags.q.in = 1;
}
| OUT_TOK
{
memset(& $$, 0, sizeof($$));
$$.flags.q.out = 1;
}
| CENTROID IN_TOK
{
memset(& $$, 0, sizeof($$));
$$.flags.q.centroid = 1; $$.flags.q.in = 1;
}
| CENTROID OUT_TOK
{
memset(& $$, 0, sizeof($$));
$$.flags.q.centroid = 1; $$.flags.q.out = 1;
}
| UNIFORM
{
memset(& $$, 0, sizeof($$));
$$.flags.q.uniform = 1;
}
;
type_specifier:
type_specifier_no_prec
{
$$ = $1;
}
| precision_qualifier type_specifier_no_prec
{
$$ = $2;
$$->precision = $1;
}
;
type_specifier_no_prec:
type_specifier_nonarray
| type_specifier_nonarray '[' ']'
{
$$ = $1;
$$->is_array = true;
$$->array_size = NULL;
}
| type_specifier_nonarray '[' constant_expression ']'
{
$$ = $1;
$$->is_array = true;
$$->array_size = $3;
}
;
type_specifier_nonarray:
basic_type_specifier_nonarray
{
void *ctx = state;
$$ = new(ctx) ast_type_specifier($1);
$$->set_location(yylloc);
}
| struct_specifier
{
void *ctx = state;
$$ = new(ctx) ast_type_specifier($1);
$$->set_location(yylloc);
}
| TYPE_IDENTIFIER
{
void *ctx = state;
$$ = new(ctx) ast_type_specifier($1);
$$->set_location(yylloc);
}
;
basic_type_specifier_nonarray:
VOID_TOK { $$ = "void"; }
| FLOAT_TOK { $$ = "float"; }
| INT_TOK { $$ = "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"; }
| MAT2X2 { $$ = "mat2"; }
| MAT2X3 { $$ = "mat2x3"; }
| MAT2X4 { $$ = "mat2x4"; }
| MAT3X2 { $$ = "mat3x2"; }
| MAT3X3 { $$ = "mat3"; }
| MAT3X4 { $$ = "mat3x4"; }
| MAT4X2 { $$ = "mat4x2"; }
| MAT4X3 { $$ = "mat4x3"; }
| MAT4X4 { $$ = "mat4"; }
| SAMPLER1D { $$ = "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"; }
| ISAMPLER1D { $$ = "isampler1D"; }
| ISAMPLER2D { $$ = "isampler2D"; }
| ISAMPLER2DRECT { $$ = "isampler2DRect"; }
| ISAMPLER3D { $$ = "isampler3D"; }
| ISAMPLERCUBE { $$ = "isamplerCube"; }
| ISAMPLER1DARRAY { $$ = "isampler1DArray"; }
| ISAMPLER2DARRAY { $$ = "isampler2DArray"; }
| ISAMPLERBUFFER { $$ = "isamplerBuffer"; }
| USAMPLER1D { $$ = "usampler1D"; }
| USAMPLER2D { $$ = "usampler2D"; }
| USAMPLER2DRECT { $$ = "usampler2DRect"; }
| USAMPLER3D { $$ = "usampler3D"; }
| USAMPLERCUBE { $$ = "usamplerCube"; }
| USAMPLER1DARRAY { $$ = "usampler1DArray"; }
| USAMPLER2DARRAY { $$ = "usampler2DArray"; }
| USAMPLERBUFFER { $$ = "usamplerBuffer"; }
;
precision_qualifier:
HIGHP {
if (!state->es_shader && state->language_version < 130)
_mesa_glsl_error(& @1, state,
"precision qualifier forbidden "
"in %s (1.30 or later "
"required)\n",
state->version_string);
$$ = ast_precision_high;
}
| MEDIUMP {
if (!state->es_shader && state->language_version < 130)
_mesa_glsl_error(& @1, state,
"precision qualifier forbidden "
"in %s (1.30 or later "
"required)\n",
state->version_string);
$$ = ast_precision_medium;
}
| LOWP {
if (!state->es_shader && state->language_version < 130)
_mesa_glsl_error(& @1, state,
"precision qualifier forbidden "
"in %s (1.30 or later "
"required)\n",
state->version_string);
$$ = ast_precision_low;
}
;
struct_specifier:
STRUCT any_identifier '{' struct_declaration_list '}'
{
void *ctx = state;
$$ = new(ctx) ast_struct_specifier($2, $4);
$$->set_location(yylloc);
state->symbols->add_type($2, glsl_type::void_type);
}
| STRUCT '{' struct_declaration_list '}'
{
void *ctx = state;
$$ = new(ctx) ast_struct_specifier(NULL, $3);
$$->set_location(yylloc);
}
;
struct_declaration_list:
struct_declaration
{
$$ = $1;
$1->link.self_link();
}
| struct_declaration_list struct_declaration
{
$$ = $1;
$$->link.insert_before(& $2->link);
}
;
struct_declaration:
type_specifier struct_declarator_list ';'
{
void *ctx = state;
ast_fully_specified_type *type = new(ctx) ast_fully_specified_type();
type->set_location(yylloc);
type->specifier = $1;
$$ = new(ctx) ast_declarator_list(type);
$$->set_location(yylloc);
$$->declarations.push_degenerate_list_at_head(& $2->link);
}
;
struct_declarator_list:
struct_declarator
{
$$ = $1;
$1->link.self_link();
}
| struct_declarator_list ',' struct_declarator
{
$$ = $1;
$$->link.insert_before(& $3->link);
}
;
struct_declarator:
any_identifier
{
void *ctx = state;
$$ = new(ctx) ast_declaration($1, false, NULL, NULL);
$$->set_location(yylloc);
}
| any_identifier '[' constant_expression ']'
{
void *ctx = state;
$$ = new(ctx) ast_declaration($1, true, $3, NULL);
$$->set_location(yylloc);
}
;
initializer:
assignment_expression
;
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);
$$->set_location(yylloc);
}
| '{'
{
state->symbols->push_scope();
}
statement_list '}'
{
void *ctx = state;
$$ = new(ctx) ast_compound_statement(true, $3);
$$->set_location(yylloc);
state->symbols->pop_scope();
}
;
statement_no_new_scope:
compound_statement_no_new_scope { $$ = (ast_node *) $1; }
| simple_statement
;
compound_statement_no_new_scope:
'{' '}'
{
void *ctx = state;
$$ = new(ctx) ast_compound_statement(false, NULL);
$$->set_location(yylloc);
}
| '{' statement_list '}'
{
void *ctx = state;
$$ = new(ctx) ast_compound_statement(false, $2);
$$->set_location(yylloc);
}
;
statement_list:
statement
{
if ($1 == NULL) {
_mesa_glsl_error(& @1, state, "<nil> statement\n");
assert($1 != NULL);
}
$$ = $1;
$$->link.self_link();
}
| statement_list statement
{
if ($2 == NULL) {
_mesa_glsl_error(& @2, state, "<nil> statement\n");
assert($2 != NULL);
}
$$ = $1;
$$->link.insert_before(& $2->link);
}
;
expression_statement:
';'
{
void *ctx = state;
$$ = new(ctx) ast_expression_statement(NULL);
$$->set_location(yylloc);
}
| expression ';'
{
void *ctx = state;
$$ = new(ctx) ast_expression_statement($1);
$$->set_location(yylloc);
}
;
selection_statement:
IF '(' expression ')' selection_rest_statement
{
$$ = new(state) ast_selection_statement($3, $5.then_statement,
$5.else_statement);
$$->set_location(yylloc);
}
;
selection_rest_statement:
statement ELSE statement
{
$$.then_statement = $1;
$$.else_statement = $3;
}
| statement
{
$$.then_statement = $1;
$$.else_statement = NULL;
}
;
condition:
expression
{
$$ = (ast_node *) $1;
}
| fully_specified_type any_identifier '=' initializer
{
void *ctx = state;
ast_declaration *decl = new(ctx) ast_declaration($2, false, NULL, $4);
ast_declarator_list *declarator = new(ctx) ast_declarator_list($1);
decl->set_location(yylloc);
declarator->set_location(yylloc);
declarator->declarations.push_tail(&decl->link);
$$ = declarator;
}
;
/*
* siwtch_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(yylloc);
}
;
switch_body:
'{' '}'
{
$$ = new(state) ast_switch_body(NULL);
$$->set_location(yylloc);
}
| '{' case_statement_list '}'
{
$$ = new(state) ast_switch_body($2);
$$->set_location(yylloc);
}
;
case_label:
CASE expression ':'
{
$$ = new(state) ast_case_label($2);
$$->set_location(yylloc);
}
| DEFAULT ':'
{
$$ = new(state) ast_case_label(NULL);
$$->set_location(yylloc);
}
;
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(yylloc);
}
| 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(yylloc);
stmts->stmts.push_tail(& $2->link);
$$ = stmts;
}
| case_statement statement
{
$$ = $1;
$$->stmts.push_tail(& $2->link);
}
;
case_statement_list:
case_statement
{
ast_case_statement_list *cases= new(state) ast_case_statement_list();
cases->set_location(yylloc);
cases->cases.push_tail(& $1->link);
$$ = 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(yylloc);
}
| DO statement WHILE '(' expression ')' ';'
{
void *ctx = state;
$$ = new(ctx) ast_iteration_statement(ast_iteration_statement::ast_do_while,
NULL, $5, NULL, $2);
$$->set_location(yylloc);
}
| 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(yylloc);
}
;
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);
$$->set_location(yylloc);
}
| BREAK ';'
{
void *ctx = state;
$$ = new(ctx) ast_jump_statement(ast_jump_statement::ast_break, NULL);
$$->set_location(yylloc);
}
| RETURN ';'
{
void *ctx = state;
$$ = new(ctx) ast_jump_statement(ast_jump_statement::ast_return, NULL);
$$->set_location(yylloc);
}
| RETURN expression ';'
{
void *ctx = state;
$$ = new(ctx) ast_jump_statement(ast_jump_statement::ast_return, $2);
$$->set_location(yylloc);
}
| DISCARD ';' // Fragment shader only.
{
void *ctx = state;
$$ = new(ctx) ast_jump_statement(ast_jump_statement::ast_discard, NULL);
$$->set_location(yylloc);
}
;
external_declaration:
function_definition { $$ = $1; }
| declaration { $$ = $1; }
| pragma_statement { $$ = NULL; }
| layout_defaults { $$ = NULL; }
;
function_definition:
function_prototype compound_statement_no_new_scope
{
void *ctx = state;
$$ = new(ctx) ast_function_definition();
$$->set_location(yylloc);
$$->prototype = $1;
$$->body = $2;
state->symbols->pop_scope();
}
;
/* layout_qualifieropt is packed into this rule */
uniform_block:
UNIFORM NEW_IDENTIFIER '{' member_list '}' ';'
{
void *ctx = state;
$$ = new(ctx) ast_uniform_block(*state->default_uniform_qualifier,
$2, $4);
if (!state->ARB_uniform_buffer_object_enable) {
_mesa_glsl_error(& @1, state,
"#version 140 / GL_ARB_uniform_buffer_object "
"required for defining uniform blocks\n");
} 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\n");
}
}
| layout_qualifier UNIFORM NEW_IDENTIFIER '{' member_list '}' ';'
{
void *ctx = state;
ast_type_qualifier qual = *state->default_uniform_qualifier;
if (!qual.merge_qualifier(& @1, state, $1)) {
YYERROR;
}
$$ = new(ctx) ast_uniform_block(qual, $3, $5);
if (!state->ARB_uniform_buffer_object_enable) {
_mesa_glsl_error(& @1, state,
"#version 140 / GL_ARB_uniform_buffer_object "
"required for defining uniform blocks\n");
} else if (state->ARB_uniform_buffer_object_warn) {
_mesa_glsl_warning(& @1, state,
"#version 140 / GL_ARB_uniform_buffer_object "
"required for defining uniform blocks\n");
}
}
;
member_list:
member_declaration
{
$$ = $1;
$1->link.self_link();
}
| member_declaration member_list
{
$$ = $1;
$2->link.insert_before(& $$->link);
}
;
/* Specifying "uniform" inside of a uniform block is redundant. */
uniformopt:
/* nothing */
| UNIFORM
;
member_declaration:
layout_qualifier uniformopt type_specifier struct_declarator_list ';'
{
void *ctx = state;
ast_fully_specified_type *type = new(ctx) ast_fully_specified_type();
type->set_location(yylloc);
type->qualifier = $1;
type->qualifier.flags.q.uniform = true;
type->specifier = $3;
$$ = new(ctx) ast_declarator_list(type);
$$->set_location(yylloc);
$$->ubo_qualifiers_valid = true;
$$->declarations.push_degenerate_list_at_head(& $4->link);
}
| uniformopt type_specifier struct_declarator_list ';'
{
void *ctx = state;
ast_fully_specified_type *type = new(ctx) ast_fully_specified_type();
type->set_location(yylloc);
type->qualifier.flags.q.uniform = true;
type->specifier = $2;
$$ = new(ctx) ast_declarator_list(type);
$$->set_location(yylloc);
$$->ubo_qualifiers_valid = true;
$$->declarations.push_degenerate_list_at_head(& $3->link);
}
;
layout_defaults:
layout_qualifier UNIFORM ';'
{
if (!state->default_uniform_qualifier->merge_qualifier(& @1, state,
$1)) {
YYERROR;
}
}