]> git.saurik.com Git - bison.git/blob - data/java.m4
Merge branch 'maint'
[bison.git] / data / java.m4
1 -*- Autoconf -*-
2
3 # Java language support for Bison
4
5 # Copyright (C) 2007-2012 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 3 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, see <http://www.gnu.org/licenses/>.
19
20 m4_include(b4_pkgdatadir/[c-like.m4])
21
22 # b4_comment(TEXT)
23 # ----------------
24 m4_define([b4_comment], [/* m4_bpatsubst([$1], [
25 ], [
26 ]) */])
27
28
29 # b4_list2(LIST1, LIST2)
30 # --------------------------
31 # Join two lists with a comma if necessary.
32 m4_define([b4_list2],
33 [$1[]m4_ifval(m4_quote($1), [m4_ifval(m4_quote($2), [[, ]])])[]$2])
34
35
36 # b4_percent_define_get3(DEF, PRE, POST, NOT)
37 # -------------------------------------------
38 # Expand to the value of DEF surrounded by PRE and POST if it's %define'ed,
39 # otherwise NOT.
40 m4_define([b4_percent_define_get3],
41 [m4_ifval(m4_quote(b4_percent_define_get([$1])),
42 [$2[]b4_percent_define_get([$1])[]$3], [$4])])
43
44
45
46 # b4_flag_value(BOOLEAN-FLAG)
47 # ---------------------------
48 m4_define([b4_flag_value], [b4_flag_if([$1], [true], [false])])
49
50
51 # b4_public_if(TRUE, FALSE)
52 # -------------------------
53 b4_percent_define_default([[public]], [[false]])
54 m4_define([b4_public_if],
55 [b4_percent_define_flag_if([public], [$1], [$2])])
56
57
58 # b4_abstract_if(TRUE, FALSE)
59 # ---------------------------
60 b4_percent_define_default([[abstract]], [[false]])
61 m4_define([b4_abstract_if],
62 [b4_percent_define_flag_if([abstract], [$1], [$2])])
63
64
65 # b4_final_if(TRUE, FALSE)
66 # ---------------------------
67 b4_percent_define_default([[final]], [[false]])
68 m4_define([b4_final_if],
69 [b4_percent_define_flag_if([final], [$1], [$2])])
70
71
72 # b4_strictfp_if(TRUE, FALSE)
73 # ---------------------------
74 b4_percent_define_default([[strictfp]], [[false]])
75 m4_define([b4_strictfp_if],
76 [b4_percent_define_flag_if([strictfp], [$1], [$2])])
77
78
79 # b4_lexer_if(TRUE, FALSE)
80 # ------------------------
81 m4_define([b4_lexer_if],
82 [b4_percent_code_ifdef([[lexer]], [$1], [$2])])
83
84
85 # b4_identification
86 # -----------------
87 m4_define([b4_identification],
88 [ /** Version number for the Bison executable that generated this parser. */
89 public static final String bisonVersion = "b4_version";
90
91 /** Name of the skeleton that generated this parser. */
92 public static final String bisonSkeleton = b4_skeleton;
93 ])
94
95
96 ## ------------ ##
97 ## Data types. ##
98 ## ------------ ##
99
100 # b4_int_type(MIN, MAX)
101 # ---------------------
102 # Return the smallest int type able to handle numbers ranging from
103 # MIN to MAX (included).
104 m4_define([b4_int_type],
105 [m4_if(b4_ints_in($@, [-128], [127]), [1], [byte],
106 b4_ints_in($@, [-32768], [32767]), [1], [short],
107 [int])])
108
109 # b4_int_type_for(NAME)
110 # ---------------------
111 # Return the smallest int type able to handle numbers ranging from
112 # `NAME_min' to `NAME_max' (included).
113 m4_define([b4_int_type_for],
114 [b4_int_type($1_min, $1_max)])
115
116 # b4_null
117 # -------
118 m4_define([b4_null], [null])
119
120
121 # b4_typed_parser_table_define(TYPE, NAME, DATA, COMMENT)
122 # -------------------------------------------------------
123 m4_define([b4_typed_parser_table_define],
124 [m4_ifval([$4], [b4_comment([$4])
125 ])dnl
126 [private static final ]$1[ yy$2_[] = yy$2_init();
127 private static final ]$1[[] yy$2_init()
128 {
129 return new ]$1[[]
130 {
131 ]$3[
132 };
133 }]])
134
135
136 # b4_integral_parser_table_define(NAME, DATA, COMMENT)
137 #-----------------------------------------------------
138 m4_define([b4_integral_parser_table_define],
139 [b4_typed_parser_table_define([b4_int_type_for([$2])], [$1], [$2], [$3])])
140
141
142 ## ------------------------- ##
143 ## Assigning token numbers. ##
144 ## ------------------------- ##
145
146 # b4_token_enum(TOKEN-NUM)
147 # ------------------------
148 # Output the definition of this token as an enum.
149 m4_define([b4_token_enum],
150 [b4_token_format([ /** Token number, to be returned by the scanner. */
151 static final int %s = %s;
152 ], [$1])])
153
154 # b4_token_enums
155 # --------------
156 # Output the definition of the tokens (if there are) as enums.
157 m4_define([b4_token_enums],
158 [b4_any_token_visible_if([/* Tokens. */
159 b4_symbol_foreach([b4_token_enum])])])
160
161 # b4-case(ID, CODE)
162 # -----------------
163 # We need to fool Java's stupid unreachable code detection.
164 m4_define([b4_case], [ case $1:
165 if (yyn == $1)
166 $2;
167 break;
168 ])
169
170 # b4_predicate_case(LABEL, CONDITIONS)
171 # ------------------------------------
172 m4_define([b4_predicate_case], [ case $1:
173 if (! ($2)) YYERROR;
174 break;
175 ])
176
177
178 ## ---------------- ##
179 ## Default values. ##
180 ## ---------------- ##
181
182 m4_define([b4_yystype], [b4_percent_define_get([[stype]])])
183 b4_percent_define_default([[stype]], [[Object]])
184
185 # %name-prefix
186 m4_define_default([b4_prefix], [[YY]])
187
188 b4_percent_define_default([[parser_class_name]], [b4_prefix[]Parser])
189 m4_define([b4_parser_class_name], [b4_percent_define_get([[parser_class_name]])])
190
191 b4_percent_define_default([[lex_throws]], [[java.io.IOException]])
192 m4_define([b4_lex_throws], [b4_percent_define_get([[lex_throws]])])
193
194 b4_percent_define_default([[throws]], [])
195 m4_define([b4_throws], [b4_percent_define_get([[throws]])])
196
197 b4_percent_define_default([[init_throws]], [])
198 m4_define([b4_init_throws], [b4_percent_define_get([[init_throws]])])
199
200 b4_percent_define_default([[location_type]], [Location])
201 m4_define([b4_location_type], [b4_percent_define_get([[location_type]])])
202
203 b4_percent_define_default([[position_type]], [Position])
204 m4_define([b4_position_type], [b4_percent_define_get([[position_type]])])
205
206
207 ## ----------------- ##
208 ## Semantic Values. ##
209 ## ----------------- ##
210
211
212 # b4_lhs_value([TYPE])
213 # --------------------
214 # Expansion of $<TYPE>$.
215 m4_define([b4_lhs_value], [yyval])
216
217
218 # b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
219 # --------------------------------------
220 # Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
221 # symbols on RHS.
222 #
223 # In this simple implementation, %token and %type have class names
224 # between the angle brackets.
225 m4_define([b4_rhs_value],
226 [(m4_ifval($3, [($3)])[](yystack.valueAt ($1-($2))))])
227
228 # b4_lhs_location()
229 # -----------------
230 # Expansion of @$.
231 m4_define([b4_lhs_location],
232 [(yyloc)])
233
234
235 # b4_rhs_location(RULE-LENGTH, NUM)
236 # ---------------------------------
237 # Expansion of @NUM, where the current rule has RULE-LENGTH symbols
238 # on RHS.
239 m4_define([b4_rhs_location],
240 [yystack.locationAt ($1-($2))])
241
242
243 # b4_lex_param
244 # b4_parse_param
245 # --------------
246 # If defined, b4_lex_param arrives double quoted, but below we prefer
247 # it to be single quoted. Same for b4_parse_param.
248
249 # TODO: should be in bison.m4
250 m4_define_default([b4_lex_param], [[]])
251 m4_define([b4_lex_param], b4_lex_param)
252 m4_define([b4_parse_param], b4_parse_param)
253
254 # b4_lex_param_decl
255 # -----------------
256 # Extra formal arguments of the constructor.
257 m4_define([b4_lex_param_decl],
258 [m4_ifset([b4_lex_param],
259 [b4_remove_comma([$1],
260 b4_param_decls(b4_lex_param))],
261 [$1])])
262
263 m4_define([b4_param_decls],
264 [m4_map([b4_param_decl], [$@])])
265 m4_define([b4_param_decl], [, $1])
266
267 m4_define([b4_remove_comma], [m4_ifval(m4_quote($1), [$1, ], [])m4_shift2($@)])
268
269
270
271 # b4_parse_param_decl
272 # -------------------
273 # Extra formal arguments of the constructor.
274 m4_define([b4_parse_param_decl],
275 [m4_ifset([b4_parse_param],
276 [b4_remove_comma([$1],
277 b4_param_decls(b4_parse_param))],
278 [$1])])
279
280
281
282 # b4_lex_param_call
283 # -----------------
284 # Delegating the lexer parameters to the lexer constructor.
285 m4_define([b4_lex_param_call],
286 [m4_ifset([b4_lex_param],
287 [b4_remove_comma([$1],
288 b4_param_calls(b4_lex_param))],
289 [$1])])
290 m4_define([b4_param_calls],
291 [m4_map([b4_param_call], [$@])])
292 m4_define([b4_param_call], [, $2])
293
294
295
296 # b4_parse_param_cons
297 # -------------------
298 # Extra initialisations of the constructor.
299 m4_define([b4_parse_param_cons],
300 [m4_ifset([b4_parse_param],
301 [b4_constructor_calls(b4_parse_param)])])
302
303 m4_define([b4_constructor_calls],
304 [m4_map([b4_constructor_call], [$@])])
305 m4_define([b4_constructor_call],
306 [this.$2 = $2;
307 ])
308
309
310
311 # b4_parse_param_vars
312 # -------------------
313 # Extra instance variables.
314 m4_define([b4_parse_param_vars],
315 [m4_ifset([b4_parse_param],
316 [
317 /* User arguments. */
318 b4_var_decls(b4_parse_param)])])
319
320 m4_define([b4_var_decls],
321 [m4_map_sep([b4_var_decl], [
322 ], [$@])])
323 m4_define([b4_var_decl],
324 [ protected final $1;])
325
326
327
328 # b4_maybe_throws(THROWS)
329 # -----------------------
330 # Expand to either an empty string or "throws THROWS".
331 m4_define([b4_maybe_throws],
332 [m4_ifval($1, [throws $1])])