7213324259
git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@22291 e7fa87d3-cd2b-0410-9028-fcbf551c1848
206 lines
7.4 KiB
Plaintext
206 lines
7.4 KiB
Plaintext
-*- Autoconf -*-
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# C++ skeleton for Bison
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# Copyright (C) 2002-2012 Free Software Foundation, Inc.
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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m4_include(b4_pkgdatadir/[c.m4])
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## ---------------- ##
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## Default values. ##
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## ---------------- ##
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# Default parser class name.
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b4_percent_define_default([[parser_class_name]], [[parser]])
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# Don't do that so that we remember whether we're using a user
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# request, or the default value.
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#
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# b4_percent_define_default([[api.location.type]], [[location]])
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b4_percent_define_default([[filename_type]], [[std::string]])
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b4_percent_define_default([[namespace]], m4_defn([b4_prefix]))
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b4_percent_define_default([[global_tokens_and_yystype]], [[false]])
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b4_percent_define_default([[define_location_comparison]],
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[m4_if(b4_percent_define_get([[filename_type]]),
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[std::string], [[true]], [[false]])])
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## ----------- ##
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## Namespace. ##
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## ----------- ##
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m4_define([b4_namespace_ref], [b4_percent_define_get([[namespace]])])
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# Don't permit an empty b4_namespace_ref. Any `::parser::foo' appended to it
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# would compile as an absolute reference with `parser' in the global namespace.
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# b4_namespace_open would open an anonymous namespace and thus establish
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# internal linkage. This would compile. However, it's cryptic, and internal
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# linkage for the parser would be specified in all translation units that
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# include the header, which is always generated. If we ever need to permit
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# internal linkage somehow, surely we can find a cleaner approach.
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m4_if(m4_bregexp(b4_namespace_ref, [^[ ]*$]), [-1], [],
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[b4_complain_at(b4_percent_define_get_loc([[namespace]]),
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[[namespace reference is empty]])])
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# Instead of assuming the C++ compiler will do it, Bison should reject any
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# invalid b4_namepsace_ref that would be converted to a valid
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# b4_namespace_open. The problem is that Bison doesn't always output
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# b4_namespace_ref to uncommented code but should reserve the ability to do so
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# in future releases without risking breaking any existing user grammars.
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# Specifically, don't allow empty names as b4_namespace_open would just convert
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# those into anonymous namespaces, and that might tempt some users.
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m4_if(m4_bregexp(b4_namespace_ref, [::[ ]*::]), [-1], [],
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[b4_complain_at(b4_percent_define_get_loc([[namespace]]),
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[[namespace reference has consecutive "::"]])])
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m4_if(m4_bregexp(b4_namespace_ref, [::[ ]*$]), [-1], [],
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[b4_complain_at(b4_percent_define_get_loc([[namespace]]),
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[[namespace reference has a trailing "::"]])])
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m4_define([b4_namespace_open],
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[b4_user_code([b4_percent_define_get_syncline([[namespace]])
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[namespace ]m4_bpatsubst(m4_dquote(m4_bpatsubst(m4_dquote(b4_namespace_ref),
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[^\(.\)[ ]*::], [\1])),
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[::], [ { namespace ])[ {]])])
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m4_define([b4_namespace_close],
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[b4_user_code([b4_percent_define_get_syncline([[namespace]])
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m4_bpatsubst(m4_dquote(m4_bpatsubst(m4_dquote(b4_namespace_ref[ ]),
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[^\(.\)[ ]*\(::\)?\([^][:]\|:[^:]\)*],
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[\1])),
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[::\([^][:]\|:[^:]\)*], [} ])[} // ]b4_namespace_ref])])
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# b4_token_enums(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
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# -----------------------------------------------------
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# Output the definition of the tokens as enums.
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m4_define([b4_token_enums],
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[/* Tokens. */
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enum yytokentype {
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m4_map_sep([ b4_token_enum], [,
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],
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[$@])
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};
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])
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## ----------------- ##
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## Semantic Values. ##
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## ----------------- ##
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# b4_lhs_value([TYPE])
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# --------------------
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# Expansion of $<TYPE>$.
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m4_define([b4_lhs_value],
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[(yyval[]m4_ifval([$1], [.$1]))])
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# b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
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# --------------------------------------
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# Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
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# symbols on RHS.
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m4_define([b4_rhs_value],
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[(yysemantic_stack_@{($1) - ($2)@}m4_ifval([$3], [.$3]))])
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# b4_lhs_location()
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# -----------------
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# Expansion of @$.
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m4_define([b4_lhs_location],
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[(yyloc)])
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# b4_rhs_location(RULE-LENGTH, NUM)
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# ---------------------------------
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# Expansion of @NUM, where the current rule has RULE-LENGTH symbols
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# on RHS.
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m4_define([b4_rhs_location],
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[(yylocation_stack_@{($1) - ($2)@})])
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# b4_parse_param_decl
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# -------------------
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# Extra formal arguments of the constructor.
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# Change the parameter names from "foo" into "foo_yyarg", so that
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# there is no collision bw the user chosen attribute name, and the
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# argument name in the constructor.
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m4_define([b4_parse_param_decl],
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[m4_ifset([b4_parse_param],
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[m4_map_sep([b4_parse_param_decl_1], [, ], [b4_parse_param])])])
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m4_define([b4_parse_param_decl_1],
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[$1_yyarg])
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# b4_parse_param_cons
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# -------------------
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# Extra initialisations of the constructor.
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m4_define([b4_parse_param_cons],
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[m4_ifset([b4_parse_param],
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[
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b4_cc_constructor_calls(b4_parse_param)])])
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m4_define([b4_cc_constructor_calls],
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[m4_map_sep([b4_cc_constructor_call], [,
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], [$@])])
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m4_define([b4_cc_constructor_call],
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[$2 ($2_yyarg)])
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# b4_parse_param_vars
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# -------------------
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# Extra instance variables.
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m4_define([b4_parse_param_vars],
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[m4_ifset([b4_parse_param],
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[
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/* User arguments. */
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b4_cc_var_decls(b4_parse_param)])])
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m4_define([b4_cc_var_decls],
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[m4_map_sep([b4_cc_var_decl], [
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], [$@])])
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m4_define([b4_cc_var_decl],
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[ $1;])
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## ---------##
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## Values. ##
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## ---------##
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# b4_yylloc_default_define
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# ------------------------
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# Define YYLLOC_DEFAULT.
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m4_define([b4_yylloc_default_define],
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[[/* YYLLOC_DEFAULT -- Set CURRENT to span from RHS[1] to RHS[N].
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If N is 0, then set CURRENT to the empty location which ends
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the previous symbol: RHS[0] (always defined). */
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# ifndef YYLLOC_DEFAULT
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# define YYLLOC_DEFAULT(Current, Rhs, N) \
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do \
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if (N) \
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{ \
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(Current).begin = YYRHSLOC (Rhs, 1).begin; \
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(Current).end = YYRHSLOC (Rhs, N).end; \
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} \
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else \
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{ \
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(Current).begin = (Current).end = YYRHSLOC (Rhs, 0).end; \
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} \
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while (/*CONSTCOND*/ false)
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# endif
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]])
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