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1 -*- Autoconf -*-
2
3# C++ skeleton for Bison
4
5# Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
6
7# This program is free software; you can redistribute it and/or modify
8# it under the terms of the GNU General Public License as published by
9# the Free Software Foundation; either version 2 of the License, or
10# (at your option) any later version.
11
12# This program is distributed in the hope that it will be useful,
13# but WITHOUT ANY WARRANTY; without even the implied warranty of
14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15# GNU General Public License for more details.
16
17# You should have received a copy of the GNU General Public License
18# along with this program; if not, write to the Free Software
19# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
20# 02110-1301 USA
21
22m4_include(b4_pkgdatadir/[c.m4])
23
24## ---------------- ##
25## Default values. ##
26## ---------------- ##
27
28# Default parser class name.
29b4_percent_define_default([[parser_class_name]], [[parser]])
30b4_percent_define_default([[location_type]], [[location]])
31b4_percent_define_default([[filename_type]], [[std::string]])
32b4_percent_define_default([[namespace]], m4_defn([b4_prefix]))
33b4_percent_define_default([[define_location_comparison]],
34 [m4_if(b4_percent_define_get([[filename_type]]),
35 [std::string], [[1]], [[0]])])
36
37
38# b4_token_enums(LIST-OF-PAIRS-TOKEN-NAME-TOKEN-NUMBER)
39# -----------------------------------------------------
40# Output the definition of the tokens as enums.
41m4_define([b4_token_enums],
42[/* Tokens. */
43 enum yytokentype {
44m4_map_sep([ b4_token_enum], [,
45],
46 [$@])
47 };
48])
49
50
51## ----------------- ##
52## Semantic Values. ##
53## ----------------- ##
54
55
56# b4_lhs_value([TYPE])
57# --------------------
58# Expansion of $<TYPE>$.
59m4_define([b4_lhs_value],
60[(yyval[]m4_ifval([$1], [.$1]))])
61
62
63# b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
64# --------------------------------------
65# Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
66# symbols on RHS.
67m4_define([b4_rhs_value],
68[(yysemantic_stack_@{($1) - ($2)@}m4_ifval([$3], [.$3]))])
69
70# b4_lhs_location()
71# -----------------
72# Expansion of @$.
73m4_define([b4_lhs_location],
74[(yyloc)])
75
76
77# b4_rhs_location(RULE-LENGTH, NUM)
78# ---------------------------------
79# Expansion of @NUM, where the current rule has RULE-LENGTH symbols
80# on RHS.
81m4_define([b4_rhs_location],
82[(yylocation_stack_@{($1) - ($2)@})])
83
84
85# b4_parse_param_decl
86# -------------------
87# Extra formal arguments of the constructor.
88# Change the parameter names from "foo" into "foo_yyarg", so that
89# there is no collision bw the user chosen attribute name, and the
90# argument name in the constructor.
91m4_define([b4_parse_param_decl],
92[m4_ifset([b4_parse_param],
93 [m4_map_sep([b4_parse_param_decl_1], [, ], [b4_parse_param])])])
94
95m4_define([b4_parse_param_decl_1],
96[$1_yyarg])
97
98
99
100# b4_parse_param_cons
101# -------------------
102# Extra initialisations of the constructor.
103m4_define([b4_parse_param_cons],
104 [m4_ifset([b4_parse_param],
105 [
106 b4_cc_constructor_calls(b4_parse_param)])])
107m4_define([b4_cc_constructor_calls],
108 [m4_map_sep([b4_cc_constructor_call], [,
109 ], [$@])])
110m4_define([b4_cc_constructor_call],
111 [$2 ($2_yyarg)])
112
113# b4_parse_param_vars
114# -------------------
115# Extra instance variables.
116m4_define([b4_parse_param_vars],
117 [m4_ifset([b4_parse_param],
118 [
119 /* User arguments. */
120b4_cc_var_decls(b4_parse_param)])])
121m4_define([b4_cc_var_decls],
122 [m4_map_sep([b4_cc_var_decl], [
123], [$@])])
124m4_define([b4_cc_var_decl],
125 [ $1;])