tests/input.at

   1 # Checking the Bison scanner.                    -*- Autotest -*-
   2 # Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
   3
   4 # This program is free software; you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License as published by
   6 # the Free Software Foundation; either version 2, or (at your option)
   7 # any later version.
   8
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program; if not, write to the Free Software
  16 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  17 # 02110-1301, USA.
  18
  19 AT_BANNER([[Input Processing.]])
  20
  21 # Mostly test that we are robust to mistakes.
  22
  23
  24 ## ------------ ##
  25 ## Invalid $n.  ##
  26 ## ------------ ##
  27
  28 AT_SETUP([Invalid \$n and @n])
  29
  30 AT_DATA([input.y],
  31 [[%%
  32 exp: { $$ = $1 ; };
  33 exp: { @$ = @1 ; };
  34 ]])
  35
  36 AT_CHECK([bison input.y], [1], [],
  37 [[input.y:2.13-14: integer out of range: `$1'
  38 input.y:3.13-14: integer out of range: `@1'
  39 ]])
  40
  41 AT_CLEANUP
  42
  43
  44 ## -------------- ##
  45 ## Type Clashes.  ##
  46 ## -------------- ##
  47
  48 AT_SETUP([Type Clashes])
  49
  50 AT_DATA([input.y],
  51 [[%union { int bar; }
  52 %token foo
  53 %type <bar> exp
  54 %%
  55 exp: foo { $$; } foo { $2; } foo
  56    | foo
  57    | /* Empty. */
  58    ;
  59 ]])
  60
  61 AT_CHECK([bison input.y], [1], [],
  62 [[input.y:5.12-13: $$ for the midrule at $2 of `exp' has no declared type
  63 input.y:5.24-25: $2 of `exp' has no declared type
  64 input.y:5.6-32: warning: type clash on default action: <bar> != <>
  65 input.y:6.6-8: warning: type clash on default action: <bar> != <>
  66 input.y:7.5: warning: empty rule for typed nonterminal, and no action
  67 ]])
  68
  69 AT_CLEANUP
  70
  71
  72 # _AT_UNUSED_VALUES_DECLARATIONS()
  73 # --------------------------------------------
  74 # Generate the token, type, and destructor
  75 # declarations for the unused values tests.
  76
  77 m4_define([_AT_UNUSED_VALUES_DECLARATIONS],
  78 [[[%token <integer> INT;
  79 %type <integer> a b c d e f g h i j k l;
  80 %destructor { destroy ($$); } INT a b c d e f g h i j k l;]]])
  81
  82
  83 # AT_CHECK_UNUSED_VALUES(DECLARATIONS_AFTER)
  84 # --------------------------------------------
  85 # Generate a grammar to test unused values,
  86 # compile it, run it.  If DECLARATIONS_AFTER
  87 # is set, then the token, type, and destructor
  88 # declarations are generated after the rules
  89 # rather than before.
  90
  91 m4_define([AT_CHECK_UNUSED_VALUES],
  92 [AT_DATA([input.y],
  93 m4_ifval($1, [
  94
  95
  96 ], [_AT_UNUSED_VALUES_DECLARATIONS
  97 ])[[%%
  98 start:
  99   'a' a { $]2[ } | 'b' b { $]2[ } | 'c' c { $]2[ } | 'd' d { $]2[ } | 'e' e { $]2[ }
 100 | 'f' f { $]2[ } | 'g' g { $]2[ } | 'h' h { $]2[ } | 'i' i { $]2[ } | 'j' j { $]2[ }
 101 | 'k' k { $]2[ } | 'l' l { $]2[ }
 102 ;
 103
 104 a: INT | INT { } INT { } INT { };
 105 b: INT | /* empty */;
 106 c: INT | INT { $]1[ } INT { } INT { };
 107 d: INT | INT { } INT { $]1[ } INT { };
 108 e: INT | INT { } INT {  } INT { $]1[ };
 109 f: INT | INT { } INT {  } INT { $]$[ = $]1[ + $]3[ + $]5[; };
 110 g: INT | INT { $<integer>$; } INT { $<integer>$; } INT { };
 111 h: INT | INT { $<integer>$; } INT { $<integer>$ = $<integer>2; } INT { };
 112 i: INT | INT INT { } { $]$[ = $]1[ + $]2[; };
 113 j: INT | INT INT { $<integer>$ = 1; } { $]$[ = $]1[ + $]2[; };
 114 k: INT | INT INT { $<integer>$; } { $<integer>$ = $<integer>3; } { };
 115 l: INT | INT { $<integer>$ = $<integer>1; } INT { $<integer>$ = $<integer>2 + $<integer>3; } INT { $<integer>$ = $<integer>4 + $<integer>5; };]]m4_ifval($1, [
 116 _AT_UNUSED_VALUES_DECLARATIONS])
 117 )
 118
 119 AT_CHECK([bison input.y], [0], [],
 120 [[input.y:11.10-32: warning: unset value: $]$[
 121 input.y:11.10-32: warning: unused value: $]1[
 122 input.y:11.10-32: warning: unused value: $]3[
 123 input.y:11.10-32: warning: unused value: $]5[
 124 input.y:12.9: warning: empty rule for typed nonterminal, and no action
 125 input.y:13.10-35: warning: unset value: $]$[
 126 input.y:13.10-35: warning: unused value: $]3[
 127 input.y:13.10-35: warning: unused value: $]5[
 128 input.y:14.10-35: warning: unset value: $]$[
 129 input.y:14.10-35: warning: unused value: $]3[
 130 input.y:14.10-35: warning: unused value: $]5[
 131 input.y:15.10-36: warning: unset value: $]$[
 132 input.y:15.10-36: warning: unused value: $]3[
 133 input.y:15.10-36: warning: unused value: $]5[
 134 input.y:17.10-58: warning: unset value: $]$[
 135 input.y:17.10-58: warning: unused value: $]1[
 136 input.y:17.10-58: warning: unused value: $]2[
 137 input.y:17.10-58: warning: unused value: $]3[
 138 input.y:17.10-58: warning: unused value: $]4[
 139 input.y:17.10-58: warning: unused value: $]5[
 140 input.y:18.10-72: warning: unset value: $]$[
 141 input.y:18.10-72: warning: unused value: $]1[
 142 input.y:18.10-72: warning: unused value: $]3[
 143 input.y:18.10-72: warning: unused value: $]4[
 144 input.y:18.10-72: warning: unused value: $]5[
 145 input.y:20.10-55: warning: unused value: $]3[
 146 input.y:21.10-68: warning: unset value: $]$[
 147 input.y:21.10-68: warning: unused value: $]1[
 148 input.y:21.10-68: warning: unused value: $]2[
 149 input.y:21.10-68: warning: unused value: $]4[
 150 ]])])
 151
 152
 153 ## --------------- ##
 154 ## Unused values.  ##
 155 ## --------------- ##
 156
 157 AT_SETUP([Unused values])
 158 AT_CHECK_UNUSED_VALUES
 159 AT_CLEANUP
 160
 161
 162 ## ------------------------------------------ ##
 163 ## Unused values before symbol declarations.  ##
 164 ## ------------------------------------------ ##
 165
 166 AT_SETUP([Unused values before symbol declarations])
 167 AT_CHECK_UNUSED_VALUES([1])
 168 AT_CLEANUP
 169
 170
 171 ## ---------------------- ##
 172 ## Incompatible Aliases.  ##
 173 ## ---------------------- ##
 174
 175 AT_SETUP([Incompatible Aliases])
 176
 177 AT_DATA([input.y],
 178 [[%token foo "foo"
 179
 180 %type <bar>       foo
 181 %printer {bar}    foo
 182 %destructor {bar} foo
 183 %left             foo
 184
 185 %type <baz>       "foo"
 186 %printer {baz}    "foo"
 187 %destructor {baz} "foo"
 188 %left             "foo"
 189
 190 %%
 191 exp: foo;
 192 ]])
 193
 194 AT_CHECK([bison input.y], [1], [],
 195 [[input.y:8.7-11: %type redeclaration for foo
 196 input.y:3.7-11: previous declaration
 197 input.y:10.13-17: %destructor redeclaration for foo
 198 input.y:5.13-17: previous declaration
 199 input.y:9.10-14: %printer redeclaration for foo
 200 input.y:4.10-14: previous declaration
 201 input.y:11.1-5: %left redeclaration for foo
 202 input.y:6.1-5: previous declaration
 203 ]])
 204
 205 AT_CLEANUP
 206
 207
 208
 209 ## ----------------------- ##
 210 ## Torturing the Scanner.  ##
 211 ## ----------------------- ##
 212
 213 # Be sure to compile and run, so that the C compiler checks what
 214 # we do.
 215
 216 AT_SETUP([Torturing the Scanner])
 217
 218
 219 AT_DATA([input.y], [])
 220 AT_CHECK([bison input.y], [1], [],
 221 [[input.y:1.1: syntax error, unexpected end of file
 222 ]])
 223
 224
 225 AT_DATA([input.y],
 226 [{}
 227 ])
 228 AT_CHECK([bison input.y], [1], [],
 229 [[input.y:1.1-2: syntax error, unexpected {...}
 230 ]])
 231
 232
 233 AT_DATA_GRAMMAR([input.y],
 234 [[%{
 235 /* This is seen in GCC: a %{ and %} in middle of a comment. */
 236 const char *foo = "So %{ and %} can be here too.";
 237
 238 #if 0
 239 /* These examples test Bison while not stressing C compilers too much.
 240    Many C compilers mishandle backslash-newlines, so this part of the
 241    test is inside "#if 0".  The comment and string are written so that
 242    the "#endif" will be seen regardless of the C compiler bugs that we
 243    know about, namely:
 244
 245      HP C (as of late 2002) mishandles *\[newline]\[newline]/ within a
 246      comment.
 247
 248      The Apple Darwin compiler (as of late 2002) mishandles
 249      \\[newline]' within a character constant.
 250
 251    */
 252
 253 /\
 254 * A comment with backslash-newlines in it. %} *\
 255 \
 256 /
 257 /* { Close the above comment, if the C compiler mishandled it.  */
 258
 259 char str[] = "\\
 260 " A string with backslash-newlines in it %{ %} \\
 261 \
 262 "";
 263
 264 char apostrophe = '\'';
 265 #endif
 266
 267 #include <stdio.h>
 268 %}
 269 /* %{ and %} can be here too. */
 270
 271 %{
 272 /* Exercise pre-prologue dependency to %union.  */
 273 typedef int value;
 274 %}
 275
 276 /* Exercise M4 quoting: '@:>@@:>@', 0.  */
 277
 278 /* Also exercise %union. */
 279 %union
 280 {
 281   value ival; /* A comment to exercise an old bug. */
 282 };
 283
 284
 285 /* Exercise post-prologue dependency to %union.  */
 286 %{
 287 static YYSTYPE value_as_yystype (value val);
 288
 289 /* Exercise quotes in declarations.  */
 290 char quote[] = "@:>@@:>@,";
 291 %}
 292
 293 %{
 294 static void yyerror (const char *s);
 295 static int yylex (void);
 296 %}
 297
 298 %type <ival> '@<:@'
 299
 300 /* Exercise quotes in strings.  */
 301 %token FAKE "fake @<:@@:>@ \a\b\f\n\r\t\v\"\'\?\\\u005B\U0000005c ??!??'??(??)??-??/??<??=??> \x1\1"
 302
 303 %%
 304 /* Exercise M4 quoting: '@:>@@:>@', @<:@, 1.  */
 305 exp: '@<:@' '\1' two '$' '@' '{' oline output.or.oline.opt
 306   {
 307     /* Exercise quotes in braces.  */
 308     char tmp[] = "@<:@%c@:>@,\n";
 309     printf (tmp, $1);
 310   }
 311 ;
 312
 313 two: '\x000000000000000000000000000000000000000000000000000000000000000000002';
 314 oline: '@' 'o' 'l' 'i' 'n' 'e' '@' '_' '_' 'o' 'l' 'i' 'n' 'e' '_' '_';
 315 output.or.oline.opt: ;|oline;;|output;;;
 316 output: '#' 'o' 'u' 't' 'p' 'u' 't' ' ';
 317 %%
 318 /* Exercise M4 quoting: '@:>@@:>@', @<:@, 2.  */
 319
 320 static YYSTYPE
 321 value_as_yystype (value val)
 322 {
 323   YYSTYPE res;
 324   res.ival = val;
 325   return res;
 326 }
 327
 328 static int
 329 yylex (void)
 330 {
 331   static const char *input = "@<:@\1\2$@{@oline@__@&t@oline__\
 332 #output "; /* "
 333   */
 334   yylval = value_as_yystype (*input);
 335   return *input++;
 336 }
 337
 338 static void
 339 yyerror (const char *msg)
 340 {
 341   fprintf (stderr, "%s\n", msg);
 342 }
 343 ]])
 344
 345 # Pacify Emacs'font-lock-mode: "
 346
 347 AT_DATA([main.c],
 348 [[typedef int value;
 349 #include "input.h"
 350
 351 int yyparse (void);
 352
 353 int
 354 main (void)
 355 {
 356   return yyparse ();
 357 }
 358 ]])
 359
 360 AT_CHECK([bison -d -v -o input.c input.y])
 361 AT_COMPILE([input.o], [-c input.c])
 362 AT_COMPILE([main.o], [-c main.c])
 363 AT_COMPILE([input], [input.o main.o])
 364 AT_PARSER_CHECK([./input], 0,
 365 [[[@<:@],
 366 ]])
 367
 368 AT_CLEANUP
 369
 370
 371 ## ---------------------- ##
 372 ## Typed symbol aliases.  ##
 373 ## ---------------------- ##
 374
 375 AT_SETUP([Typed symbol aliases])
 376
 377 # Bison 2.0 broke typed symbol aliases - ensure they work.
 378
 379 AT_DATA_GRAMMAR([input.y],
 380 [[%union
 381 {
 382   int val;
 383 };
 384 %token <val> MY_TOKEN "MY TOKEN"
 385 %type <val> exp
 386 %%
 387 exp: "MY TOKEN";
 388 %%
 389 ]])
 390
 391 AT_CHECK([bison -o input.c input.y])
 392
 393 AT_CLEANUP
 394
 395
 396 ## --------- ##
 397 ## Require.  ##
 398 ## --------- ##
 399
 400 m4_define([AT_CHECK_REQUIRE],
 401 [AT_SETUP([Require $1])
 402 AT_DATA_GRAMMAR([input.y],
 403 [[%require "$1";
 404 %%
 405 empty_file:;
 406 ]])
 407 AT_CHECK([bison -o input.c input.y], $2, [], ignore)
 408 AT_CLEANUP
 409 ])
 410
 411 AT_CHECK_REQUIRE(1.0, 0)
 412 AT_CHECK_REQUIRE(AT_PACKAGE_VERSION, 0)
 413 ## FIXME: Some day augment this version number.
 414 AT_CHECK_REQUIRE(100.0, 63)