data/java.m4

   1                                                             -*- Autoconf -*-
   2
   3 # Java language support for Bison
   4
   5 # Copyright (C) 2007-2013 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
  23 # b4_list2(LIST1, LIST2)
  24 # ----------------------
  25 # Join two lists with a comma if necessary.
  26 m4_define([b4_list2],
  27           [$1[]m4_ifval(m4_quote($1), [m4_ifval(m4_quote($2), [[, ]])])[]$2])
  28
  29
  30 # b4_percent_define_get3(DEF, PRE, POST, NOT)
  31 # -------------------------------------------
  32 # Expand to the value of DEF surrounded by PRE and POST if it's %define'ed,
  33 # otherwise NOT.
  34 m4_define([b4_percent_define_get3],
  35           [m4_ifval(m4_quote(b4_percent_define_get([$1])),
  36                 [$2[]b4_percent_define_get([$1])[]$3], [$4])])
  37
  38
  39
  40 # b4_flag_value(BOOLEAN-FLAG)
  41 # ---------------------------
  42 m4_define([b4_flag_value], [b4_flag_if([$1], [true], [false])])
  43
  44
  45 # b4_public_if(TRUE, FALSE)
  46 # -------------------------
  47 b4_percent_define_default([[public]], [[false]])
  48 m4_define([b4_public_if],
  49 [b4_percent_define_flag_if([public], [$1], [$2])])
  50
  51
  52 # b4_abstract_if(TRUE, FALSE)
  53 # ---------------------------
  54 b4_percent_define_default([[abstract]], [[false]])
  55 m4_define([b4_abstract_if],
  56 [b4_percent_define_flag_if([abstract], [$1], [$2])])
  57
  58
  59 # b4_final_if(TRUE, FALSE)
  60 # ---------------------------
  61 b4_percent_define_default([[final]], [[false]])
  62 m4_define([b4_final_if],
  63 [b4_percent_define_flag_if([final], [$1], [$2])])
  64
  65
  66 # b4_strictfp_if(TRUE, FALSE)
  67 # ---------------------------
  68 b4_percent_define_default([[strictfp]], [[false]])
  69 m4_define([b4_strictfp_if],
  70 [b4_percent_define_flag_if([strictfp], [$1], [$2])])
  71
  72
  73 # b4_lexer_if(TRUE, FALSE)
  74 # ------------------------
  75 m4_define([b4_lexer_if],
  76 [b4_percent_code_ifdef([[lexer]], [$1], [$2])])
  77
  78
  79 # b4_identification
  80 # -----------------
  81 m4_define([b4_identification],
  82 [  /** Version number for the Bison executable that generated this parser.  */
  83   public static final String bisonVersion = "b4_version";
  84
  85   /** Name of the skeleton that generated this parser.  */
  86   public static final String bisonSkeleton = b4_skeleton;
  87 ])
  88
  89
  90 ## ------------ ##
  91 ## Data types.  ##
  92 ## ------------ ##
  93
  94 # b4_int_type(MIN, MAX)
  95 # ---------------------
  96 # Return the smallest int type able to handle numbers ranging from
  97 # MIN to MAX (included).
  98 m4_define([b4_int_type],
  99 [m4_if(b4_ints_in($@,   [-128],   [127]), [1], [byte],
 100        b4_ints_in($@, [-32768], [32767]), [1], [short],
 101                                                [int])])
 102
 103 # b4_int_type_for(NAME)
 104 # ---------------------
 105 # Return the smallest int type able to handle numbers ranging from
 106 # 'NAME_min' to 'NAME_max' (included).
 107 m4_define([b4_int_type_for],
 108 [b4_int_type($1_min, $1_max)])
 109
 110 # b4_null
 111 # -------
 112 m4_define([b4_null], [null])
 113
 114
 115 # b4_typed_parser_table_define(TYPE, NAME, DATA, COMMENT)
 116 # -------------------------------------------------------
 117 m4_define([b4_typed_parser_table_define],
 118 [m4_ifval([$4], [b4_comment([$4])
 119   ])dnl
 120 [private static final ]$1[ yy$2_[] = yy$2_init();
 121   private static final ]$1[[] yy$2_init()
 122   {
 123     return new ]$1[[]
 124     {
 125   ]$3[
 126     };
 127   }]])
 128
 129
 130 # b4_integral_parser_table_define(NAME, DATA, COMMENT)
 131 #-----------------------------------------------------
 132 m4_define([b4_integral_parser_table_define],
 133 [b4_typed_parser_table_define([b4_int_type_for([$2])], [$1], [$2], [$3])])
 134
 135
 136 ## ------------------------- ##
 137 ## Assigning token numbers.  ##
 138 ## ------------------------- ##
 139
 140 # b4_token_enum(TOKEN-NUM)
 141 # ------------------------
 142 # Output the definition of this token as an enum.
 143 m4_define([b4_token_enum],
 144 [b4_token_format([    /** Token number, to be returned by the scanner.  */
 145     static final int %s = %s;
 146 ], [$1])])
 147
 148 # b4_token_enums
 149 # --------------
 150 # Output the definition of the tokens (if there are) as enums.
 151 m4_define([b4_token_enums],
 152 [b4_any_token_visible_if([/* Tokens.  */
 153 b4_symbol_foreach([b4_token_enum])])])
 154
 155 # b4-case(ID, CODE)
 156 # -----------------
 157 # We need to fool Java's stupid unreachable code detection.
 158 m4_define([b4_case], [  case $1:
 159   if (yyn == $1)
 160     $2;
 161   break;
 162     ])
 163
 164 # b4_predicate_case(LABEL, CONDITIONS)
 165 # ------------------------------------
 166 m4_define([b4_predicate_case], [  case $1:
 167      if (! ($2)) YYERROR;
 168     break;
 169     ])
 170
 171
 172 ## ---------------- ##
 173 ## Default values.  ##
 174 ## ---------------- ##
 175
 176 m4_define([b4_yystype], [b4_percent_define_get([[api.value.type]])])
 177 b4_percent_define_default([[api.value.type]], [[Object]])
 178
 179 # %name-prefix
 180 m4_define_default([b4_prefix], [[YY]])
 181
 182 b4_percent_define_default([[parser_class_name]], [b4_prefix[]Parser])
 183 m4_define([b4_parser_class_name], [b4_percent_define_get([[parser_class_name]])])
 184
 185 b4_percent_define_default([[lex_throws]], [[java.io.IOException]])
 186 m4_define([b4_lex_throws], [b4_percent_define_get([[lex_throws]])])
 187
 188 b4_percent_define_default([[throws]], [])
 189 m4_define([b4_throws], [b4_percent_define_get([[throws]])])
 190
 191 b4_percent_define_default([[init_throws]], [])
 192 m4_define([b4_init_throws], [b4_percent_define_get([[init_throws]])])
 193
 194 b4_percent_define_default([[api.location.type]], [Location])
 195 m4_define([b4_location_type], [b4_percent_define_get([[api.location.type]])])
 196
 197 b4_percent_define_default([[api.position.type]], [Position])
 198 m4_define([b4_position_type], [b4_percent_define_get([[api.position.type]])])
 199
 200
 201 ## ----------------- ##
 202 ## Semantic Values.  ##
 203 ## ----------------- ##
 204
 205
 206 # b4_lhs_value([TYPE])
 207 # --------------------
 208 # Expansion of $<TYPE>$.
 209 m4_define([b4_lhs_value], [yyval])
 210
 211
 212 # b4_rhs_value(RULE-LENGTH, NUM, [TYPE])
 213 # --------------------------------------
 214 # Expansion of $<TYPE>NUM, where the current rule has RULE-LENGTH
 215 # symbols on RHS.
 216 #
 217 # In this simple implementation, %token and %type have class names
 218 # between the angle brackets.
 219 m4_define([b4_rhs_value],
 220 [(m4_ifval($3, [($3)])[](yystack.valueAt ($1-($2))))])
 221
 222 # b4_lhs_location()
 223 # -----------------
 224 # Expansion of @$.
 225 m4_define([b4_lhs_location],
 226 [(yyloc)])
 227
 228
 229 # b4_rhs_location(RULE-LENGTH, NUM)
 230 # ---------------------------------
 231 # Expansion of @NUM, where the current rule has RULE-LENGTH symbols
 232 # on RHS.
 233 m4_define([b4_rhs_location],
 234 [yystack.locationAt ($1-($2))])
 235
 236
 237 # b4_lex_param
 238 # b4_parse_param
 239 # --------------
 240 # If defined, b4_lex_param arrives double quoted, but below we prefer
 241 # it to be single quoted.  Same for b4_parse_param.
 242
 243 # TODO: should be in bison.m4
 244 m4_define_default([b4_lex_param], [[]])
 245 m4_define([b4_lex_param], b4_lex_param)
 246 m4_define([b4_parse_param], b4_parse_param)
 247
 248 # b4_lex_param_decl
 249 # -----------------
 250 # Extra formal arguments of the constructor.
 251 m4_define([b4_lex_param_decl],
 252 [m4_ifset([b4_lex_param],
 253           [b4_remove_comma([$1],
 254                            b4_param_decls(b4_lex_param))],
 255           [$1])])
 256
 257 m4_define([b4_param_decls],
 258           [m4_map([b4_param_decl], [$@])])
 259 m4_define([b4_param_decl], [, $1])
 260
 261 m4_define([b4_remove_comma], [m4_ifval(m4_quote($1), [$1, ], [])m4_shift2($@)])
 262
 263
 264
 265 # b4_parse_param_decl
 266 # -------------------
 267 # Extra formal arguments of the constructor.
 268 m4_define([b4_parse_param_decl],
 269 [m4_ifset([b4_parse_param],
 270           [b4_remove_comma([$1],
 271                            b4_param_decls(b4_parse_param))],
 272           [$1])])
 273
 274
 275
 276 # b4_lex_param_call
 277 # -----------------
 278 # Delegating the lexer parameters to the lexer constructor.
 279 m4_define([b4_lex_param_call],
 280           [m4_ifset([b4_lex_param],
 281                     [b4_remove_comma([$1],
 282                                      b4_param_calls(b4_lex_param))],
 283                     [$1])])
 284 m4_define([b4_param_calls],
 285           [m4_map([b4_param_call], [$@])])
 286 m4_define([b4_param_call], [, $2])
 287
 288
 289
 290 # b4_parse_param_cons
 291 # -------------------
 292 # Extra initialisations of the constructor.
 293 m4_define([b4_parse_param_cons],
 294           [m4_ifset([b4_parse_param],
 295                     [b4_constructor_calls(b4_parse_param)])])
 296
 297 m4_define([b4_constructor_calls],
 298           [m4_map([b4_constructor_call], [$@])])
 299 m4_define([b4_constructor_call],
 300           [this.$2 = $2;
 301           ])
 302
 303
 304
 305 # b4_parse_param_vars
 306 # -------------------
 307 # Extra instance variables.
 308 m4_define([b4_parse_param_vars],
 309           [m4_ifset([b4_parse_param],
 310                     [
 311     /* User arguments.  */
 312 b4_var_decls(b4_parse_param)])])
 313
 314 m4_define([b4_var_decls],
 315           [m4_map_sep([b4_var_decl], [
 316 ], [$@])])
 317 m4_define([b4_var_decl],
 318           [    protected final $1;])
 319
 320
 321
 322 # b4_maybe_throws(THROWS)
 323 # -----------------------
 324 # Expand to either an empty string or "throws THROWS".
 325 m4_define([b4_maybe_throws],
 326           [m4_ifval($1, [throws $1])])