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      1 # Checking the Bison scanner.                    -*- Autotest -*-
      2 
      3 # Copyright (C) 2002-2012 Free Software Foundation, Inc.
      4 
      5 # This program is free software: you can redistribute it and/or modify
      6 # it under the terms of the GNU General Public License as published by
      7 # the Free Software Foundation, either version 3 of the License, or
      8 # (at your option) any later version.
      9 #
     10 # This program is distributed in the hope that it will be useful,
     11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
     12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     13 # GNU General Public License for more details.
     14 #
     15 # You should have received a copy of the GNU General Public License
     16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
     17 
     18 AT_BANNER([[Input Processing.]])
     19 
     20 # Mostly test that we are robust to mistakes.
     21 
     22 
     23 ## ---------------- ##
     24 ## Invalid inputs.  ##
     25 ## ---------------- ##
     26 
     27 AT_SETUP([Invalid inputs])
     28 
     29 AT_DATA([input.y],
     30 [[\000\001\002\377?
     31 %%
     32 ?
     33 default: 'a' }
     34 %&
     35 %a-does-not-exist
     36 %-
     37 %{
     38 ]])
     39 AT_CHECK([[$PERL -pi -e 's/\\(\d{3})/chr(oct($1))/ge' input.y || exit 77]])
     40 
     41 AT_BISON_CHECK([input.y], [1], [],
     42 [[input.y:1.1-2: error: invalid characters: '\0\001\002\377?'
     43 input.y:3.1: error: invalid character: '?'
     44 input.y:4.14: error: invalid character: '}'
     45 input.y:5.1: error: invalid character: '%'
     46 input.y:5.2: error: invalid character: '&'
     47 input.y:6.1-17: error: invalid directive: '%a-does-not-exist'
     48 input.y:7.1: error: invalid character: '%'
     49 input.y:7.2: error: invalid character: '-'
     50 input.y:8.1-9.0: error: missing '%}' at end of file
     51 input.y:8.1-9.0: error: syntax error, unexpected %{...%}
     52 ]])
     53 
     54 AT_CLEANUP
     55 
     56 
     57 AT_SETUP([Invalid inputs with {}])
     58 
     59 # We used to SEGV here.  See
     60 # http://lists.gnu.org/archive/html/bug-bison/2005-07/msg00053.html
     61 
     62 AT_DATA([input.y],
     63 [[
     64 %destructor
     65 %initial-action
     66 %lex-param
     67 %parse-param
     68 %printer
     69 %union
     70 ]])
     71 
     72 AT_BISON_CHECK([input.y], [1], [],
     73 [[input.y:3.1-15: error: syntax error, unexpected %initial-action, expecting {...}
     74 ]])
     75 
     76 AT_CLEANUP
     77 
     78 
     79 
     80 ## ------------ ##
     81 ## Invalid $n.  ##
     82 ## ------------ ##
     83 
     84 AT_SETUP([Invalid $n and @n])
     85 
     86 AT_DATA([input.y],
     87 [[%%
     88 exp: { $$ = $1 ; };
     89 exp: { @$ = @1 ; };
     90 ]])
     91 
     92 AT_BISON_CHECK([input.y], [1], [],
     93 [[input.y:2.13-14: error: integer out of range: '$1'
     94 input.y:3.13-14: error: integer out of range: '@1'
     95 ]])
     96 
     97 AT_CLEANUP
     98 
     99 
    100 ## -------------- ##
    101 ## Type Clashes.  ##
    102 ## -------------- ##
    103 
    104 AT_SETUP([Type Clashes])
    105 
    106 AT_DATA([input.y],
    107 [[%union { int bar; }
    108 %token foo
    109 %type <bar> exp
    110 %%
    111 exp: foo { $$; } foo { $2; } foo
    112    | foo
    113    | /* Empty. */
    114    ;
    115 ]])
    116 
    117 AT_BISON_CHECK([input.y], [1], [],
    118 [[input.y:5.12-13: error: $$ for the midrule at $2 of 'exp' has no declared type
    119 input.y:5.24-25: error: $2 of 'exp' has no declared type
    120 input.y:5.6-32: warning: type clash on default action: <bar> != <>
    121 input.y:6.6-8: warning: type clash on default action: <bar> != <>
    122 input.y:7.5: warning: empty rule for typed nonterminal, and no action
    123 ]])
    124 
    125 AT_CLEANUP
    126 
    127 
    128 # _AT_UNUSED_VALUES_DECLARATIONS()
    129 # --------------------------------
    130 # Generate the token, type, and destructor
    131 # declarations for the unused values tests.
    132 
    133 m4_define([_AT_UNUSED_VALUES_DECLARATIONS],
    134 [[[%token <integer> INT;
    135 %type <integer> a b c d e f g h i j k l;
    136 %destructor { destroy ($$); } INT a b c d e f g h i j k l;]]])
    137 
    138 
    139 # AT_CHECK_UNUSED_VALUES(DECLARATIONS_AFTER, CHECK_MIDRULE_VALUES)
    140 # ------------------------------------------------------------------
    141 # Generate a grammar to test unused values,
    142 # compile it, run it.  If DECLARATIONS_AFTER
    143 # is set, then the token, type, and destructor
    144 # declarations are generated after the rules
    145 # rather than before.  If CHECK_MIDRULE_VALUES
    146 # is set, then --warnings=midrule-values is
    147 # set.
    148 
    149 m4_define([AT_CHECK_UNUSED_VALUES],
    150 [AT_DATA([input.y],
    151 m4_ifval($1, [
    152 
    153 
    154 ], [_AT_UNUSED_VALUES_DECLARATIONS
    155 ])[[%%
    156 start:
    157   'a' a { $]2[; } | 'b' b { $]2[; } | 'c' c { $]2[; } | 'd' d { $]2[; }
    158 | 'e' e { $]2[; } | 'f' f { $]2[; } | 'g' g { $]2[; } | 'h' h { $]2[; }
    159 | 'i' i { $]2[; } | 'j' j { $]2[; } | 'k' k { $]2[; } | 'l' l { $]2[; }
    160 ;
    161 
    162 a: INT | INT { } INT { } INT { };
    163 b: INT | /* empty */;
    164 c: INT | INT { $]1[; } INT { $<integer>2; } INT { $<integer>4; };
    165 d: INT | INT { } INT { $]1[; } INT { $<integer>2; };
    166 e: INT | INT { } INT {  } INT { $]1[; };
    167 f: INT | INT { } INT {  } INT { $]$[ = $]1[ + $]3[ + $]5[; };
    168 g: INT | INT { $<integer>$; } INT { $<integer>$; } INT { };
    169 h: INT | INT { $<integer>$; } INT { $<integer>$ = $<integer>2; } INT { };
    170 i: INT | INT INT { } { $]$[ = $]1[ + $]2[; };
    171 j: INT | INT INT { $<integer>$ = 1; } { $]$[ = $]1[ + $]2[; };
    172 k: INT | INT INT { $<integer>$; } { $<integer>$ = $<integer>3; } { };
    173 l: INT | INT { $<integer>$ = $<integer>1; } INT { $<integer>$ = $<integer>2 + $<integer>3; } INT { $<integer>$ = $<integer>4 + $<integer>5; };]]m4_ifval($1, [
    174 _AT_UNUSED_VALUES_DECLARATIONS])
    175 )
    176 
    177 AT_BISON_CHECK(m4_ifval($2, [--warnings=midrule-values ])[-fcaret input.y],
    178                [0], [],
    179 [[input.y:11.10-32: warning: unset value: $][$
    180  a: INT | INT { } INT { } INT { };
    181           ^^^^^^^^^^^^^^^^^^^^^^^
    182 input.y:11.10-12: warning: unused value: $][1
    183  a: INT | INT { } INT { } INT { };
    184           ^^^
    185 input.y:11.18-20: warning: unused value: $][3
    186  a: INT | INT { } INT { } INT { };
    187                   ^^^
    188 input.y:11.26-28: warning: unused value: $][5
    189  a: INT | INT { } INT { } INT { };
    190                           ^^^
    191 input.y:12.9: warning: empty rule for typed nonterminal, and no action
    192  b: INT | /* empty */;
    193          ^
    194 ]]m4_ifval($2, [[[input.y:13.14-20: warning: unset value: $][$
    195  c: INT | INT { $][1; } INT { $<integer>2; } INT { $<integer>4; };
    196               ^^^^^^^
    197 input.y:13.26-41: warning: unset value: $][$
    198  c: INT | INT { $][1; } INT { $<integer>2; } INT { $<integer>4; };
    199                           ^^^^^^^^^^^^^^^^
    200 ]]])[[input.y:13.10-62: warning: unset value: $][$
    201  c: INT | INT { $][1; } INT { $<integer>2; } INT { $<integer>4; };
    202           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    203 input.y:13.22-24: warning: unused value: $][3
    204  c: INT | INT { $][1; } INT { $<integer>2; } INT { $<integer>4; };
    205                       ^^^
    206 input.y:13.43-45: warning: unused value: $][5
    207  c: INT | INT { $][1; } INT { $<integer>2; } INT { $<integer>4; };
    208                                            ^^^
    209 ]]m4_ifval($2, [[[input.y:14.14-16: warning: unset value: $][$
    210  d: INT | INT { } INT { $][1; } INT { $<integer>2; };
    211               ^^^
    212 ]]])[[input.y:14.10-49: warning: unset value: $][$
    213  d: INT | INT { } INT { $][1; } INT { $<integer>2; };
    214           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    215 input.y:14.18-20: warning: unused value: $][3
    216  d: INT | INT { } INT { $][1; } INT { $<integer>2; };
    217                   ^^^
    218 input.y:14.30-32: warning: unused value: $][5
    219  d: INT | INT { } INT { $][1; } INT { $<integer>2; };
    220                               ^^^
    221 input.y:15.10-37: warning: unset value: $][$
    222  e: INT | INT { } INT {  } INT { $][1; };
    223           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    224 input.y:15.18-20: warning: unused value: $][3
    225  e: INT | INT { } INT {  } INT { $][1; };
    226                   ^^^
    227 input.y:15.27-29: warning: unused value: $][5
    228  e: INT | INT { } INT {  } INT { $][1; };
    229                            ^^^
    230 input.y:17.10-58: warning: unset value: $][$
    231  g: INT | INT { $<integer>$; } INT { $<integer>$; } INT { };
    232           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    233 input.y:17.10-12: warning: unused value: $][1
    234  g: INT | INT { $<integer>$; } INT { $<integer>$; } INT { };
    235           ^^^
    236 ]]m4_ifval($2, [[[input.y:17.14-29: warning: unused value: $][2
    237  g: INT | INT { $<integer>$; } INT { $<integer>$; } INT { };
    238               ^^^^^^^^^^^^^^^^
    239 ]]])[[input.y:17.31-33: warning: unused value: $][3
    240  g: INT | INT { $<integer>$; } INT { $<integer>$; } INT { };
    241                                ^^^
    242 ]]m4_ifval($2, [[[input.y:17.35-50: warning: unused value: $][4
    243  g: INT | INT { $<integer>$; } INT { $<integer>$; } INT { };
    244                                    ^^^^^^^^^^^^^^^^
    245 ]]])[[input.y:17.52-54: warning: unused value: $][5
    246  g: INT | INT { $<integer>$; } INT { $<integer>$; } INT { };
    247                                                     ^^^
    248 input.y:18.10-72: warning: unset value: $][$
    249  h: INT | INT { $<integer>$; } INT { $<integer>$ = $<integer>2; } INT { };
    250           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    251 input.y:18.10-12: warning: unused value: $][1
    252  h: INT | INT { $<integer>$; } INT { $<integer>$ = $<integer>2; } INT { };
    253           ^^^
    254 input.y:18.31-33: warning: unused value: $][3
    255  h: INT | INT { $<integer>$; } INT { $<integer>$ = $<integer>2; } INT { };
    256                                ^^^
    257 ]]m4_ifval($2, [[[input.y:18.35-64: warning: unused value: $][4
    258  h: INT | INT { $<integer>$; } INT { $<integer>$ = $<integer>2; } INT { };
    259                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    260 ]]])[[input.y:18.66-68: warning: unused value: $][5
    261  h: INT | INT { $<integer>$; } INT { $<integer>$ = $<integer>2; } INT { };
    262                                                                   ^^^
    263 ]]m4_ifval($2, [[[input.y:20.18-37: warning: unused value: $][3
    264  j: INT | INT INT { $<integer>$ = 1; } { $][$ = $][1 + $][2; };
    265                   ^^^^^^^^^^^^^^^^^^^^
    266 ]]])[[input.y:21.10-68: warning: unset value: $][$
    267  k: INT | INT INT { $<integer>$; } { $<integer>$ = $<integer>3; } { };
    268           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    269 input.y:21.10-12: warning: unused value: $][1
    270  k: INT | INT INT { $<integer>$; } { $<integer>$ = $<integer>3; } { };
    271           ^^^
    272 input.y:21.14-16: warning: unused value: $][2
    273  k: INT | INT INT { $<integer>$; } { $<integer>$ = $<integer>3; } { };
    274               ^^^
    275 ]]m4_ifval($2, [[[input.y:21.35-64: warning: unused value: $][4
    276  k: INT | INT INT { $<integer>$; } { $<integer>$ = $<integer>3; } { };
    277                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    278 ]]]))
    279 ])
    280 
    281 ## --------------- ##
    282 ## Unused values.  ##
    283 ## --------------- ##
    284 
    285 AT_SETUP([Unused values])
    286 AT_CHECK_UNUSED_VALUES
    287 AT_CHECK_UNUSED_VALUES(, [1])
    288 AT_CLEANUP
    289 
    290 
    291 ## ------------------------------------------ ##
    292 ## Unused values before symbol declarations.  ##
    293 ## ------------------------------------------ ##
    294 
    295 AT_SETUP([Unused values before symbol declarations])
    296 AT_CHECK_UNUSED_VALUES([1])
    297 AT_CHECK_UNUSED_VALUES([1], [1])
    298 AT_CLEANUP
    299 
    300 
    301 ## --------------------------------------------- ##
    302 ## Default %printer and %destructor redeclared.  ##
    303 ## --------------------------------------------- ##
    304 
    305 AT_SETUP([Default %printer and %destructor redeclared])
    306 
    307 AT_DATA([[input.y]],
    308 [[%destructor { destroy ($$); } <*> <*>
    309 %printer { print ($$); } <*> <*>
    310 
    311 %destructor { destroy ($$); } <*>
    312 %printer { print ($$); } <*>
    313 
    314 %destructor { destroy ($$); } <> <>
    315 %printer { print ($$); } <> <>
    316 
    317 %destructor { destroy ($$); } <>
    318 %printer { print ($$); } <>
    319 
    320 %%
    321 
    322 start: ;
    323 
    324 %destructor { destroy ($$); } <*>;
    325 %printer { print ($$); } <*>;
    326 
    327 %destructor { destroy ($$); } <>;
    328 %printer { print ($$); } <>;
    329 ]])
    330 
    331 AT_BISON_CHECK([input.y], [1], [],
    332 [[input.y:1.13-29: error: redeclaration for default tagged %destructor
    333 input.y:1.13-29:     previous declaration
    334 input.y:2.10-24: error: redeclaration for default tagged %printer
    335 input.y:2.10-24:     previous declaration
    336 input.y:4.13-29: error: redeclaration for default tagged %destructor
    337 input.y:1.13-29:     previous declaration
    338 input.y:5.10-24: error: redeclaration for default tagged %printer
    339 input.y:2.10-24:     previous declaration
    340 input.y:7.13-29: error: redeclaration for default tagless %destructor
    341 input.y:7.13-29:     previous declaration
    342 input.y:8.10-24: error: redeclaration for default tagless %printer
    343 input.y:8.10-24:     previous declaration
    344 input.y:10.13-29: error: redeclaration for default tagless %destructor
    345 input.y:7.13-29:      previous declaration
    346 input.y:11.10-24: error: redeclaration for default tagless %printer
    347 input.y:8.10-24:      previous declaration
    348 input.y:17.13-29: error: redeclaration for default tagged %destructor
    349 input.y:4.13-29:      previous declaration
    350 input.y:18.10-24: error: redeclaration for default tagged %printer
    351 input.y:5.10-24:      previous declaration
    352 input.y:20.13-29: error: redeclaration for default tagless %destructor
    353 input.y:10.13-29:     previous declaration
    354 input.y:21.10-24: error: redeclaration for default tagless %printer
    355 input.y:11.10-24:     previous declaration
    356 ]])
    357 
    358 AT_CLEANUP
    359 
    360 
    361 ## ---------------------------------------------- ##
    362 ## Per-type %printer and %destructor redeclared.  ##
    363 ## ---------------------------------------------- ##
    364 
    365 AT_SETUP([Per-type %printer and %destructor redeclared])
    366 
    367 AT_DATA([[input.y]],
    368 [[%destructor { destroy ($$); } <field1> <field2>
    369 %printer { print ($$); } <field1> <field2>
    370 
    371 %destructor { destroy ($$); } <field1> <field1>
    372 %printer { print ($$); } <field2> <field2>
    373 
    374 %%
    375 
    376 start: ;
    377 
    378 %destructor { destroy ($$); } <field2> <field1>;
    379 %printer { print ($$); } <field2> <field1>;
    380 ]])
    381 
    382 AT_BISON_CHECK([input.y], [1], [],
    383 [[input.y:4.13-29: error: %destructor redeclaration for <field1>
    384 input.y:1.13-29:     previous declaration
    385 input.y:4.13-29: error: %destructor redeclaration for <field1>
    386 input.y:4.13-29:     previous declaration
    387 input.y:5.10-24: error: %printer redeclaration for <field2>
    388 input.y:2.10-24:     previous declaration
    389 input.y:5.10-24: error: %printer redeclaration for <field2>
    390 input.y:5.10-24:     previous declaration
    391 input.y:11.13-29: error: %destructor redeclaration for <field1>
    392 input.y:4.13-29:      previous declaration
    393 input.y:11.13-29: error: %destructor redeclaration for <field2>
    394 input.y:1.13-29:      previous declaration
    395 input.y:12.10-24: error: %printer redeclaration for <field1>
    396 input.y:2.10-24:      previous declaration
    397 input.y:12.10-24: error: %printer redeclaration for <field2>
    398 input.y:5.10-24:      previous declaration
    399 ]])
    400 
    401 AT_CLEANUP
    402 
    403 
    404 ## ---------------------------------------- ##
    405 ## Unused values with default %destructor.  ##
    406 ## ---------------------------------------- ##
    407 
    408 AT_SETUP([Unused values with default %destructor])
    409 
    410 AT_DATA([[input.y]],
    411 [[%destructor { destroy ($$); } <>
    412 %type <tag> tagged
    413 
    414 %%
    415 
    416 start: end end tagged tagged { $<tag>1; $3; } ;
    417 end: { } ;
    418 tagged: { } ;
    419 ]])
    420 
    421 AT_BISON_CHECK([input.y], [0], [],
    422 [[input.y:6.8-45: warning: unset value: $$
    423 input.y:6.12-14: warning: unused value: $2
    424 input.y:7.6-8: warning: unset value: $$
    425 ]])
    426 
    427 AT_DATA([[input.y]],
    428 [[%destructor { destroy ($$); } <*>
    429 %type <tag> tagged
    430 
    431 %%
    432 
    433 start: end end tagged tagged { $<tag>1; $3; } ;
    434 end: { } ;
    435 tagged: { } ;
    436 ]])
    437 
    438 AT_BISON_CHECK([input.y], [0], [],
    439 [[input.y:6.23-28: warning: unused value: $4
    440 input.y:8.9-11: warning: unset value: $$
    441 ]])
    442 
    443 AT_CLEANUP
    444 
    445 
    446 ## ----------------------------------------- ##
    447 ## Unused values with per-type %destructor.  ##
    448 ## ----------------------------------------- ##
    449 
    450 AT_SETUP([Unused values with per-type %destructor])
    451 
    452 AT_DATA([[input.y]],
    453 [[%destructor { destroy ($$); } <field1>
    454 %type <field1> start end
    455 
    456 %%
    457 
    458 start: end end { $1; } ;
    459 end: { }  ;
    460 ]])
    461 
    462 AT_BISON_CHECK([input.y], [0], [],
    463 [[input.y:6.8-22: warning: unset value: $$
    464 input.y:6.12-14: warning: unused value: $2
    465 input.y:7.6-8: warning: unset value: $$
    466 ]])
    467 
    468 AT_CLEANUP
    469 
    470 
    471 ## ---------------------- ##
    472 ## Incompatible Aliases.  ##
    473 ## ---------------------- ##
    474 
    475 AT_SETUP([Incompatible Aliases])
    476 
    477 AT_DATA([input.y],
    478 [[%token foo "foo"
    479 
    480 %type <bar>       foo
    481 %printer {bar}    foo
    482 %destructor {bar} foo
    483 %left             foo
    484 
    485 %type <baz>       "foo"
    486 %printer {baz}    "foo"
    487 %destructor {baz} "foo"
    488 %left             "foo"
    489 
    490 %%
    491 exp: foo;
    492 ]])
    493 
    494 AT_BISON_CHECK([input.y], [1], [],
    495 [[input.y:8.7-11: error: %type redeclaration for foo
    496 input.y:3.7-11:     previous declaration
    497 input.y:10.13-17: error: %destructor redeclaration for foo
    498 input.y:5.13-17:      previous declaration
    499 input.y:9.10-14: error: %printer redeclaration for foo
    500 input.y:4.10-14:     previous declaration
    501 input.y:11.1-5: error: %left redeclaration for foo
    502 input.y:6.1-5:      previous declaration
    503 ]])
    504 
    505 AT_CLEANUP
    506 
    507 
    508 
    509 ## ----------------------- ##
    510 ## Torturing the Scanner.  ##
    511 ## ----------------------- ##
    512 
    513 # Be sure to compile and run, so that the C compiler checks what
    514 # we do.
    515 
    516 AT_SETUP([Torturing the Scanner])
    517 
    518 AT_BISON_OPTION_PUSHDEFS
    519 AT_DATA([input.y], [])
    520 AT_BISON_CHECK([input.y], [1], [],
    521 [[input.y:1.1: error: syntax error, unexpected end of file
    522 ]])
    523 
    524 
    525 AT_DATA([input.y],
    526 [{}
    527 ])
    528 AT_BISON_CHECK([input.y], [1], [],
    529 [[input.y:1.1-2: error: syntax error, unexpected {...}
    530 ]])
    531 
    532 
    533 AT_DATA_GRAMMAR([input.y],
    534 [[%{
    535 /* This is seen in GCC: a %{ and %} in middle of a comment. */
    536 const char *foo = "So %{ and %} can be here too.";
    537 
    538 #if 0
    539 /* These examples test Bison while not stressing C compilers too much.
    540    Many C compilers mishandle backslash-newlines, so this part of the
    541    test is inside "#if 0".  The comment and string are written so that
    542    the "#endif" will be seen regardless of the C compiler bugs that we
    543    know about, namely:
    544 
    545      HP C (as of late 2002) mishandles *\[newline]\[newline]/ within a
    546      comment.
    547 
    548      The Apple Darwin compiler (as of late 2002) mishandles
    549      \\[newline]' within a character constant.
    550 
    551    */
    552 
    553 /\
    554 * A comment with backslash-newlines in it. %} *\
    555 \
    556 /
    557 /* { Close the above comment, if the C compiler mishandled it.  */
    558 
    559 char str[] = "\\
    560 " A string with backslash-newlines in it %{ %} \\
    561 \
    562 "";
    563 
    564 char apostrophe = '\'';
    565 #endif
    566 
    567 #include <stdio.h>
    568 #include <stdlib.h>
    569 #include <assert.h>
    570 %}
    571 /* %{ and %} can be here too. */
    572 
    573 %{
    574 /* Exercise pre-prologue dependency to %union.  */
    575 typedef int value;
    576 %}
    577 
    578 /* Exercise M4 quoting: '@:>@@:>@', 0.  */
    579 
    580 /* Also exercise %union. */
    581 %union
    582 {
    583   value ival; /* A comment to exercise an old bug. */
    584 };
    585 
    586 
    587 /* Exercise post-prologue dependency to %union.  */
    588 %{
    589 static YYSTYPE value_as_yystype (value val);
    590 
    591 /* Exercise quotes in declarations.  */
    592 char quote[] = "@:>@@:>@,";
    593 %}
    594 
    595 %{
    596 ]AT_YYERROR_DECLARE[
    597 ]AT_YYLEX_DECLARE[
    598 %}
    599 
    600 %type <ival> '@<:@'
    601 
    602 /* Exercise quotes in strings.  */
    603 %token FAKE "fake @<:@@:>@ \a\b\f\n\r\t\v\"\'\?\\\u005B\U0000005c ??!??'??(??)??-??/??<??=??> \x1\1"
    604 
    605 %%
    606 /* Exercise M4 quoting: '@:>@@:>@', @<:@, 1.  */
    607 exp: '@<:@' '\1' two '$' '@' '{' oline output.or.oline.opt
    608   {
    609     /* Exercise quotes in braces.  */
    610     char tmp[] = "@<:@%c@:>@,\n";
    611     printf (tmp, $1);
    612   }
    613 ;
    614 
    615 two: '\x000000000000000000000000000000000000000000000000000000000000000000002';
    616 oline: '@' 'o' 'l' 'i' 'n' 'e' '@' '_' '_' 'o' 'l' 'i' 'n' 'e' '_' '_';
    617 output.or.oline.opt: ;|oline;;|output;;;
    618 output: '#' 'o' 'u' 't' 'p' 'u' 't' ' ';
    619 %%
    620 /* Exercise M4 quoting: '@:>@@:>@', @<:@, 2.  */
    621 
    622 static YYSTYPE
    623 value_as_yystype (value val)
    624 {
    625   YYSTYPE res;
    626   res.ival = val;
    627   return res;
    628 }
    629 ]AT_YYERROR_DEFINE[
    630 static int
    631 yylex (void)
    632 {
    633   static char const input[] = "@<:@\1\2$@{@oline@__@&t@oline__\
    634 #output "; /* "
    635   */
    636   static size_t toknum;
    637   assert (toknum < sizeof input);
    638   yylval = value_as_yystype (input[toknum]);
    639   return input[toknum++];
    640 }
    641 ]])
    642 
    643 # Pacify Emacs' font-lock-mode: "
    644 
    645 AT_DATA([main.c],
    646 [[typedef int value;
    647 #include "input.h"
    648 
    649 int yyparse (void);
    650 
    651 int
    652 main (void)
    653 {
    654   return yyparse ();
    655 }
    656 ]])
    657 AT_BISON_OPTION_POPDEFS
    658 
    659 AT_BISON_CHECK([-d -v -o input.c input.y])
    660 AT_COMPILE([input.o])
    661 AT_COMPILE([main.o])
    662 AT_COMPILE([input], [input.o main.o])
    663 AT_PARSER_CHECK([./input], 0,
    664 [[[@<:@],
    665 ]])
    666 
    667 AT_CLEANUP
    668 
    669 
    670 ## ---------------------- ##
    671 ## Typed symbol aliases.  ##
    672 ## ---------------------- ##
    673 
    674 AT_SETUP([Typed symbol aliases])
    675 
    676 # Bison 2.0 broke typed symbol aliases - ensure they work.
    677 
    678 AT_DATA_GRAMMAR([input.y],
    679 [[%union
    680 {
    681   int val;
    682 };
    683 %token <val> MY_TOKEN "MY TOKEN"
    684 %type <val> exp
    685 %%
    686 exp: "MY TOKEN";
    687 %%
    688 ]])
    689 
    690 AT_BISON_CHECK([-o input.c input.y])
    691 
    692 AT_CLEANUP
    693 
    694 
    695 ## --------- ##
    696 ## Require.  ##
    697 ## --------- ##
    698 
    699 m4_define([AT_CHECK_REQUIRE],
    700 [AT_SETUP([Require $1])
    701 AT_DATA_GRAMMAR([input.y],
    702 [[%require "$1";
    703 %%
    704 empty_file:;
    705 ]])
    706 AT_BISON_CHECK([-o input.c input.y], $2, [], ignore)
    707 AT_CLEANUP
    708 ])
    709 
    710 AT_CHECK_REQUIRE(1.0, 0)
    711 AT_CHECK_REQUIRE(AT_PACKAGE_VERSION, 0)
    712 ## FIXME: Some day augment this version number.
    713 AT_CHECK_REQUIRE(100.0, 63)
    714 
    715 
    716 ## ------------------------------------- ##
    717 ## String aliases for character tokens.  ##
    718 ## ------------------------------------- ##
    719 
    720 AT_SETUP([String aliases for character tokens])
    721 
    722 # Bison once thought a character token and its alias were different symbols
    723 # with the same user token number.
    724 
    725 AT_DATA_GRAMMAR([input.y],
    726 [[%token 'a' "a"
    727 %%
    728 start: 'a';
    729 %%
    730 ]])
    731 
    732 AT_BISON_CHECK([-o input.c input.y])
    733 
    734 AT_CLEANUP
    735 
    736 
    737 ## -------------- ##
    738 ## Symbol names.  ##
    739 ## -------------- ##
    740 
    741 AT_SETUP([Symbols])
    742 
    743 AT_BISON_OPTION_PUSHDEFS
    744 AT_DATA_GRAMMAR([input.y],
    745 [[%token WITH-DASH
    746 %token WITHOUT_DASH "WITHOUT-DASH"
    747 %token WITH.PERIOD
    748 %token WITHOUT_PERIOD "WITHOUT.PERIOD"
    749 %code {
    750   ]AT_YYERROR_DECLARE[
    751   ]AT_YYLEX_DECLARE[
    752 }
    753 %%
    754 start: with-dash without_dash with.period without_period;
    755 with-dash: WITH-DASH;
    756 without_dash: "WITHOUT-DASH";
    757 with.period: WITH.PERIOD;
    758 without_period: "WITHOUT.PERIOD";
    759 %%
    760 ]AT_YYERROR_DEFINE[
    761 ]AT_YYLEX_DEFINE[
    762 ]])
    763 AT_BISON_OPTION_POPDEFS
    764 
    765 # POSIX Yacc accept periods, but not dashes.
    766 AT_BISON_CHECK([--yacc input.y], [1], [],
    767 [[input.y:9.8-16: POSIX Yacc forbids dashes in symbol names: WITH-DASH
    768 input.y:18.8-16: POSIX Yacc forbids dashes in symbol names: with-dash
    769 ]])
    770 
    771 # So warn about them.
    772 AT_BISON_CHECK([-Wyacc input.y], [], [],
    773 [[input.y:9.8-16: warning: POSIX Yacc forbids dashes in symbol names: WITH-DASH
    774 input.y:18.8-16: warning: POSIX Yacc forbids dashes in symbol names: with-dash
    775 ]])
    776 
    777 # Dashes are fine for GNU Bison.
    778 AT_BISON_CHECK([-o input.c input.y])
    779 
    780 # Make sure we don't export silly token identifiers with periods or dashes.
    781 AT_COMPILE([input.o])
    782 
    783 
    784 # Periods are genuine letters, they can start identifiers.
    785 # Digits and dashes cannot.
    786 AT_DATA_GRAMMAR([input.y],
    787 [[%token .GOOD
    788          -GOOD
    789          1NV4L1D
    790          -123
    791 %%
    792 start: .GOOD GOOD
    793 ]])
    794 AT_BISON_CHECK([-o input.c input.y], [1], [],
    795 [[input.y:10.10: error: invalid character: '-'
    796 input.y:11.10-16: error: invalid identifier: '1NV4L1D'
    797 input.y:12.10: error: invalid character: '-'
    798 ]])
    799 
    800 AT_CLEANUP
    801 
    802 
    803 ## ----------------- ##
    804 ## Numbered tokens.  ##
    805 ## ----------------- ##
    806 
    807 AT_SETUP([Numbered tokens])
    808 
    809 AT_DATA_GRAMMAR([redecl.y],
    810 [[%token DECIMAL_1     11259375
    811          HEXADECIMAL_1 0xabcdef
    812          HEXADECIMAL_2 0xFEDCBA
    813          DECIMAL_2     16702650
    814 %%
    815 start: DECIMAL_1 HEXADECIMAL_2;
    816 ]])
    817 
    818 AT_BISON_CHECK([redecl.y], [1], [],
    819 [[redecl.y:10.10-22: error: user token number 11259375 redeclaration for HEXADECIMAL_1
    820 redecl.y:9.8-16:       previous declaration for DECIMAL_1
    821 redecl.y:12.10-18: error: user token number 16702650 redeclaration for DECIMAL_2
    822 redecl.y:11.10-22:     previous declaration for HEXADECIMAL_2
    823 ]])
    824 
    825 AT_DATA_GRAMMAR([too-large.y],
    826 [[%token TOO_LARGE_DEC 999999999999999999999
    827          TOO_LARGE_HEX 0xFFFFFFFFFFFFFFFFFFF
    828 %%
    829 start: TOO_LARGE_DEC TOO_LARGE_HEX
    830 %%
    831 ]])
    832 
    833 AT_BISON_CHECK([too-large.y], [1], [],
    834 [[too-large.y:9.22-42: error: integer out of range: '999999999999999999999'
    835 too-large.y:10.24-44: error: integer out of range: '0xFFFFFFFFFFFFFFFFFFF'
    836 ]])
    837 
    838 AT_CLEANUP
    839 
    840 
    841 ## --------------------- ##
    842 ## Unclosed constructs.  ##
    843 ## --------------------- ##
    844 
    845 AT_SETUP([Unclosed constructs])
    846 
    847 # Bison's scan-gram.l once forgot to STRING_FINISH some unclosed constructs, so
    848 # they were prepended to whatever it STRING_GROW'ed next.  It also threw them
    849 # away rather than returning them to the parser.  The effect was confusing
    850 # subsequent error messages.
    851 
    852 AT_DATA([input.y],
    853 [[%token A "a
    854 %token B "b"
    855 %token AB "ab" // Used to complain that "ab" was already used.
    856 %token C '1
    857 %token TWO "2"
    858 %token TICK_TWELVE "'12" // Used to complain that "'12" was already used.
    859 
    860 %%
    861 
    862 start: ;
    863 
    864 // Used to report a syntax error because it didn't see any kind of symbol
    865 // identifier.
    866 %type <f> 'a
    867 ;
    868 %type <f> "a
    869 ;
    870 // Used to report a syntax error because it didn't see braced code.
    871 %destructor { free ($$)
    872 ]])
    873 
    874 AT_BISON_CHECK([-o input.c input.y], 1, [],
    875 [[input.y:1.10-2.0: error: missing '"' at end of line
    876 input.y:4.10-5.0: error: missing "'" at end of line
    877 input.y:14.11-15.0: error: missing "'" at end of line
    878 input.y:16.11-17.0: error: missing '"' at end of line
    879 input.y:19.13-20.0: error: missing '}' at end of file
    880 input.y:20.1: error: syntax error, unexpected end of file
    881 ]])
    882 
    883 AT_BISON_CHECK([-fcaret -o input.c input.y], 1, [],
    884 [[input.y:1.10-2.0: error: missing '"' at end of line
    885  %token A "a
    886           ^^
    887 input.y:4.10-5.0: error: missing "'" at end of line
    888  %token C '1
    889           ^^
    890 input.y:14.11-15.0: error: missing "'" at end of line
    891  %type <f> 'a
    892            ^^
    893 input.y:16.11-17.0: error: missing '"' at end of line
    894  %type <f> "a
    895            ^^
    896 input.y:19.13-20.0: error: missing '}' at end of file
    897  %destructor { free ($$)
    898              ^^^^^^^^^^^
    899 input.y:20.1: error: syntax error, unexpected end of file
    900 ]])
    901 
    902 AT_CLEANUP
    903 
    904 
    905 ## ------------------------- ##
    906 ## %start after first rule.  ##
    907 ## ------------------------- ##
    908 
    909 AT_SETUP([%start after first rule])
    910 
    911 # Bison once complained that a %start after the first rule was a redeclaration
    912 # of the start symbol.
    913 
    914 AT_DATA([input.y],
    915 [[%%
    916 false_start: ;
    917 start: false_start ;
    918 %start start;
    919 ]])
    920 
    921 AT_BISON_CHECK([-o input.c input.y])
    922 
    923 AT_CLEANUP
    924 
    925 
    926 ## --------------------- ##
    927 ## %prec takes a token.  ##
    928 ## --------------------- ##
    929 
    930 AT_SETUP([%prec takes a token])
    931 
    932 # Bison once allowed %prec sym where sym was a nonterminal.
    933 
    934 AT_DATA([input.y],
    935 [[%%
    936 start: PREC %prec PREC ;
    937 PREC: ;
    938 ]])
    939 
    940 AT_BISON_CHECK([input.y], [1], [],
    941 [[input.y:3.1-4: error: rule given for PREC, which is a token
    942 ]])
    943 
    944 AT_CLEANUP
    945 
    946 
    947 ## ------------------------------- ##
    948 ## %prec's token must be defined.  ##
    949 ## ------------------------------- ##
    950 
    951 AT_SETUP([[%prec's token must be defined]])
    952 
    953 # According to POSIX, a %prec token must be defined separately.
    954 
    955 AT_DATA([[input.y]],
    956 [[%%
    957 start: %prec PREC ;
    958 ]])
    959 
    960 AT_BISON_CHECK([[input.y]], [[0]], [],
    961 [[input.y:2.8-17: warning: token for %prec is not defined: PREC
    962 ]])
    963 
    964 AT_CLEANUP
    965 
    966 
    967 ## -------------------------------- ##
    968 ## Reject unused %code qualifiers.  ##
    969 ## -------------------------------- ##
    970 
    971 AT_SETUP([Reject unused %code qualifiers])
    972 
    973 AT_DATA([input-c.y],
    974 [[%code q {}
    975 %code bad {}
    976 %code bad {}
    977 %code format {}
    978 %%
    979 start: ;
    980 ]])
    981 AT_BISON_CHECK([[input-c.y]], [[1]], [],
    982 [[input-c.y:1.7: error: %code qualifier 'q' is not used
    983 input-c.y:2.7-9: error: %code qualifier 'bad' is not used
    984 input-c.y:3.7-9: error: %code qualifier 'bad' is not used
    985 input-c.y:4.7-12: error: %code qualifier 'format' is not used
    986 ]])
    987 
    988 AT_DATA([input-c-glr.y],
    989 [[%code q {}
    990 %code bad {}
    991  %code bad {}
    992 %%
    993 start: ;
    994 ]])
    995 AT_BISON_CHECK([[input-c-glr.y]], [[1]], [],
    996 [[input-c-glr.y:1.7: error: %code qualifier 'q' is not used
    997 input-c-glr.y:2.7-9: error: %code qualifier 'bad' is not used
    998 input-c-glr.y:3.8-10: error: %code qualifier 'bad' is not used
    999 ]])
   1000 
   1001 AT_DATA([input-c++.y],
   1002 [[%code q {}
   1003 %code bad {}
   1004  %code q {}
   1005 %%
   1006 start: ;
   1007 ]])
   1008 AT_BISON_CHECK([[input-c++.y]], [[1]], [],
   1009 [[input-c++.y:1.7: error: %code qualifier 'q' is not used
   1010 input-c++.y:2.7-9: error: %code qualifier 'bad' is not used
   1011 input-c++.y:3.8: error: %code qualifier 'q' is not used
   1012 ]])
   1013 
   1014 AT_DATA([input-c++-glr.y],
   1015 [[%code bad {}
   1016 %code q {}
   1017 %code q {}
   1018 %%
   1019 start: ;
   1020 ]])
   1021 AT_BISON_CHECK([[input-c++-glr.y]], [[1]], [],
   1022 [[input-c++-glr.y:1.7-9: error: %code qualifier 'bad' is not used
   1023 input-c++-glr.y:2.7: error: %code qualifier 'q' is not used
   1024 input-c++-glr.y:3.7: error: %code qualifier 'q' is not used
   1025 ]])
   1026 
   1027 AT_DATA([special-char-@@.y],
   1028 [[%code bad {}
   1029 %code q {}
   1030 %code q {}
   1031 %%
   1032 start: ;
   1033 ]])
   1034 AT_BISON_CHECK([[special-char-@@.y]], [[1]], [],
   1035 [[special-char-@@.y:1.7-9: error: %code qualifier 'bad' is not used
   1036 special-char-@@.y:2.7: error: %code qualifier 'q' is not used
   1037 special-char-@@.y:3.7: error: %code qualifier 'q' is not used
   1038 ]])
   1039 
   1040 AT_DATA([special-char-@:>@.y],
   1041 [[%code bad {}
   1042 %code q {}
   1043 %code q {}
   1044 %%
   1045 start: ;
   1046 ]])
   1047 AT_BISON_CHECK([[special-char-@:>@.y]], [[1]], [],
   1048 [[special-char-@:>@.y:1.7-9: error: %code qualifier 'bad' is not used
   1049 special-char-@:>@.y:2.7: error: %code qualifier 'q' is not used
   1050 special-char-@:>@.y:3.7: error: %code qualifier 'q' is not used
   1051 ]])
   1052 
   1053 AT_CLEANUP
   1054 
   1055 
   1056 ## ---------------- ##
   1057 ## %define errors.  ##
   1058 ## ---------------- ##
   1059 
   1060 AT_SETUP([%define errors])
   1061 
   1062 AT_DATA([input-redefined.y],
   1063 [[%define var "value1"
   1064 %define var "value1"
   1065  %define var "value2"
   1066 %define special1 "@:>@"
   1067 %define special2 "@<:@"
   1068 %%
   1069 start: ;
   1070 ]])
   1071 
   1072 AT_BISON_CHECK([[input-redefined.y]], [[1]], [],
   1073 [[input-redefined.y:2.9-11: error: %define variable 'var' redefined
   1074 input-redefined.y:1.9-11:     previous definition
   1075 input-redefined.y:3.10-12: error: %define variable 'var' redefined
   1076 input-redefined.y:2.9-11:      previous definition
   1077 ]])
   1078 
   1079 AT_DATA([input-unused.y],
   1080 [[%define var "value"
   1081 %%
   1082 start: ;
   1083 ]])
   1084 
   1085 AT_BISON_CHECK([[input-unused.y]], [[1]], [],
   1086 [[input-unused.y:1.9-11: error: %define variable 'var' is not used
   1087 ]])
   1088 
   1089 AT_CLEANUP
   1090 
   1091 
   1092 ## ----------------------------------- ##
   1093 ## %define, --define, --force-define.  ##
   1094 ## ----------------------------------- ##
   1095 
   1096 AT_SETUP([[%define, --define, --force-define]])
   1097 
   1098 AT_DATA([[skel.c]],
   1099 [[m4@&t@_divert_push(0)@
   1100 @output(b4_parser_file_name@)@
   1101 [var-dd: ]b4_percent_define_get([[var-dd]])[
   1102 var-ff: ]b4_percent_define_get([[var-ff]])[
   1103 var-dfg: ]b4_percent_define_get([[var-dfg]])[
   1104 var-fd: ]b4_percent_define_get([[var-fd]])
   1105 m4@&t@_divert_pop(0)
   1106 ]])
   1107 AT_DATA([[input.y]],
   1108 [[%define var-dfg "gram"
   1109 %%
   1110 start: ;
   1111 ]])
   1112 AT_BISON_CHECK([[-Dvar-dd=cmd-d1 -Dvar-dd=cmd-d2 \
   1113                  -Fvar-ff=cmd-f1 -Fvar-ff=cmd-f2 \
   1114                  -Dvar-dfg=cmd-d -Fvar-dfg=cmd-f \
   1115                  -Fvar-fd=cmd-f -Dvar-fd=cmd-d   \
   1116                  --skeleton ./skel.c input.y]])
   1117 AT_CHECK([[cat input.tab.c]], [[0]],
   1118 [[var-dd: cmd-d2
   1119 var-ff: cmd-f2
   1120 var-dfg: cmd-f
   1121 var-fd: cmd-d
   1122 ]])
   1123 
   1124 AT_DATA([[input-dg.y]],
   1125 [[%define var "gram"
   1126 %%
   1127 start: ;
   1128 ]])
   1129 AT_BISON_CHECK([[-Dvar=cmd-d input-dg.y]], [[1]], [],
   1130 [[input-dg.y:1.9-11: error: %define variable 'var' redefined
   1131 <command line>:1:      previous definition
   1132 ]])
   1133 
   1134 AT_DATA([[input-dg.y]],
   1135 [[%define var "gram"
   1136 %%
   1137 start: ;
   1138 ]])
   1139 AT_BISON_CHECK([[-fcaret -Dvar=cmd-d input-dg.y]], [[1]], [],
   1140 [[input-dg.y:1.9-11: error: %define variable 'var' redefined
   1141  %define var "gram"
   1142          ^^^
   1143 <command line>:2:      previous definition
   1144 ]])
   1145 
   1146 AT_DATA([[input-unused.y]],
   1147 [[%%
   1148 start: ;
   1149 ]])
   1150 AT_BISON_CHECK([[-Dunused-d -Funused-f input-unused.y]], [[1]], [],
   1151 [[<command line>:1: error: %define variable 'unused-d' is not used
   1152 <command line>:2: error: %define variable 'unused-f' is not used
   1153 ]])
   1154 
   1155 AT_CLEANUP
   1156 
   1157 ## --------------------------- ##
   1158 ## %define Boolean variables.  ##
   1159 ## --------------------------- ##
   1160 
   1161 AT_SETUP([[%define Boolean variables]])
   1162 
   1163 AT_DATA([Input.y],
   1164 [[%language "Java"
   1165 %define public "maybe"
   1166 %define parser_class_name "Input"
   1167 %%
   1168 start: ;
   1169 ]])
   1170 
   1171 AT_BISON_CHECK([[Input.y]], [1], [],
   1172 [[Input.y:2.9-14: error: invalid value for %define Boolean variable 'public'
   1173 ]])
   1174 
   1175 AT_CLEANUP
   1176 
   1177 ## ------------------------ ##
   1178 ## %define enum variables.  ##
   1179 ## ------------------------ ##
   1180 
   1181 AT_SETUP([[%define enum variables]])
   1182 
   1183 # Front-end.
   1184 AT_DATA([[input.y]],
   1185 [[%define lr.default-reductions bogus
   1186 %%
   1187 start: ;
   1188 ]])
   1189 AT_BISON_CHECK([[input.y]], [[1]], [[]],
   1190 [[input.y:1.9-29: error: invalid value for %define variable 'lr.default-reductions': 'bogus'
   1191 input.y:1.9-29:     accepted value: 'most'
   1192 input.y:1.9-29:     accepted value: 'consistent'
   1193 input.y:1.9-29:     accepted value: 'accepting'
   1194 ]])
   1195 
   1196 # Back-end.
   1197 # FIXME: these should be indented, but we shouldn't mess with the m4 yet
   1198 AT_DATA([[input.y]],
   1199 [[%define api.push-pull neither
   1200 %%
   1201 start: ;
   1202 ]])
   1203 AT_BISON_CHECK([[input.y]], [1], [],
   1204 [[input.y:1.9-21: error: invalid value for %define variable 'api.push-pull': 'neither'
   1205 input.y:1.9-21: error: accepted value: 'pull'
   1206 input.y:1.9-21: error: accepted value: 'push'
   1207 input.y:1.9-21: error: accepted value: 'both'
   1208 ]])
   1209 
   1210 AT_CLEANUP
   1211 
   1212 ## -------------------------------- ##
   1213 ## %define backward compatibility.  ##
   1214 ## -------------------------------- ##
   1215 
   1216 AT_SETUP([[%define backward compatibility]])
   1217 
   1218 # The error messages tell us whether underscores in these variables are
   1219 # being converted to dashes.
   1220 
   1221 AT_DATA([[input.y]],
   1222 [[%define api.push_pull "neither"
   1223 %%
   1224 start: ;
   1225 ]])
   1226 AT_BISON_CHECK([[input.y]], [1], [],
   1227 [[input.y:1.9-21: error: invalid value for %define variable 'api.push-pull': 'neither'
   1228 input.y:1.9-21: error: accepted value: 'pull'
   1229 input.y:1.9-21: error: accepted value: 'push'
   1230 input.y:1.9-21: error: accepted value: 'both'
   1231 ]])
   1232 
   1233 AT_DATA([[input.y]],
   1234 [[%define lr.keep_unreachable_states maybe
   1235 %%
   1236 start: ;
   1237 ]])
   1238 AT_BISON_CHECK([[input.y]], [1], [],
   1239 [[input.y:1.9-34: error: invalid value for %define Boolean variable 'lr.keep-unreachable-states'
   1240 ]])
   1241 
   1242 AT_DATA([[input.y]],
   1243 [[%define foo_bar "baz"
   1244 %%
   1245 start: ;
   1246 ]])
   1247 AT_BISON_CHECK([[input.y]], [[1]], [],
   1248 [[input.y:1.9-15: error: %define variable 'foo_bar' is not used
   1249 ]])
   1250 
   1251 AT_CLEANUP
   1252 
   1253 ## ------------------------- ##
   1254 ## Unused %define api.pure.  ##
   1255 ## ------------------------- ##
   1256 
   1257 AT_SETUP([[Unused %define api.pure]])
   1258 
   1259 # AT_CHECK_API_PURE(DECLS, VALUE)
   1260 # -------------------------------
   1261 # Make sure Bison reports that `%define api.pure VALUE' is unused when DECLS
   1262 # are specified.
   1263 m4_define([AT_CHECK_API_PURE],
   1264 [
   1265 AT_DATA([[input.y]],
   1266 [[%define api.pure ]$2[
   1267 ]$1[
   1268 %%
   1269 start: ;
   1270 ]])
   1271 
   1272 AT_BISON_CHECK([[input.y]], [[1]], [],
   1273 [[input.y:1.9-16: error: %define variable 'api.pure' is not used
   1274 ]])
   1275 ])
   1276 
   1277 AT_CHECK_API_PURE([[%language "c++" %defines]], [[]])
   1278 AT_CHECK_API_PURE([[%language "c++" %defines]], [[false]])
   1279 AT_CHECK_API_PURE([[%language "c++" %defines %glr-parser]], [[""]])
   1280 AT_CHECK_API_PURE([[%language "c++" %defines %glr-parser]], [[false]])
   1281 AT_CHECK_API_PURE([[%language "java"]], [[true]])
   1282 AT_CHECK_API_PURE([[%language "java"]], [[false]])
   1283 
   1284 AT_CLEANUP
   1285 
   1286 ## -------------------------------- ##
   1287 ## C++ namespace reference errors.  ##
   1288 ## -------------------------------- ##
   1289 
   1290 AT_SETUP([[C++ namespace reference errors]])
   1291 
   1292 # AT_CHECK_NAMESPACE_ERROR(NAMESPACE-DECL, ERROR, [ERROR], ...)
   1293 # -------------------------------------------------------------
   1294 # Make sure Bison reports all ERROR's for %define namespace "NAMESPACE-DECL".
   1295 m4_define([AT_CHECK_NAMESPACE_ERROR],
   1296 [
   1297 AT_DATA([[input.y]],
   1298 [[%language "C++"
   1299 %defines
   1300 %define namespace "]$1["
   1301 %%
   1302 start: ;
   1303 ]])
   1304 
   1305 AT_BISON_CHECK([[input.y]], [1], [],
   1306 [m4_foreach([b4_arg], m4_dquote(m4_shift($@)),
   1307 [[input.y:3.9-17: error: ]b4_arg[
   1308 ]])])
   1309 ])
   1310 
   1311 AT_CHECK_NAMESPACE_ERROR([[]],
   1312                          [[namespace reference is empty]])
   1313 AT_CHECK_NAMESPACE_ERROR([[ 		  	 	]],
   1314                          [[namespace reference is empty]])
   1315 AT_CHECK_NAMESPACE_ERROR([[foo::::bar]],
   1316                          [[namespace reference has consecutive "::"]])
   1317 AT_CHECK_NAMESPACE_ERROR([[foo:: 	::bar]],
   1318                          [[namespace reference has consecutive "::"]])
   1319 AT_CHECK_NAMESPACE_ERROR([[::::bar]],
   1320                          [[namespace reference has consecutive "::"]])
   1321 AT_CHECK_NAMESPACE_ERROR([[:: ::bar]],
   1322                          [[namespace reference has consecutive "::"]])
   1323 AT_CHECK_NAMESPACE_ERROR([[foo::bar::	::]],
   1324                          [[namespace reference has consecutive "::"]],
   1325                          [[namespace reference has a trailing "::"]])
   1326 AT_CHECK_NAMESPACE_ERROR([[foo::bar::]],
   1327                          [[namespace reference has a trailing "::"]])
   1328 AT_CHECK_NAMESPACE_ERROR([[foo::bar:: 	]],
   1329                          [[namespace reference has a trailing "::"]])
   1330 AT_CHECK_NAMESPACE_ERROR([[::]],
   1331                          [[namespace reference has a trailing "::"]])
   1332 
   1333 AT_CLEANUP
   1334 
   1335 ## ------------------------ ##
   1336 ## Bad character literals.  ##
   1337 ## ------------------------ ##
   1338 
   1339 # Bison used to accept character literals that were empty or contained
   1340 # too many characters.
   1341 
   1342 # FIXME: AT_DATA or some variant of AT_DATA may eventually permit
   1343 # the final newline to be omitted.  See the threads starting at
   1344 # <http://lists.gnu.org/archive/html/bison-patches/2009-07/msg00019.html>.
   1345 
   1346 AT_SETUP([[Bad character literals]])
   1347 
   1348 AT_DATA([empty.y],
   1349 [[%%
   1350 start: '';
   1351 start: '
   1352 ]])
   1353 AT_CHECK([[$PERL -e "print 'start: \'';" >> empty.y || exit 77]])
   1354 
   1355 AT_BISON_CHECK([empty.y], [1], [],
   1356 [[empty.y:2.8-9: warning: empty character literal
   1357 empty.y:3.8-4.0: warning: empty character literal
   1358 empty.y:3.8-4.0: error: missing "'" at end of line
   1359 empty.y:4.8: warning: empty character literal
   1360 empty.y:4.8: error: missing "'" at end of file
   1361 ]])
   1362 
   1363 AT_DATA([two.y],
   1364 [[%%
   1365 start: 'ab';
   1366 start: 'ab
   1367 ]])
   1368 AT_CHECK([[$PERL -e "print 'start: \'ab';" >> two.y || exit 77]])
   1369 
   1370 AT_BISON_CHECK([two.y], [1], [],
   1371 [[two.y:2.8-11: warning: extra characters in character literal
   1372 two.y:3.8-4.0: warning: extra characters in character literal
   1373 two.y:3.8-4.0: error: missing "'" at end of line
   1374 two.y:4.8-10: warning: extra characters in character literal
   1375 two.y:4.8-10: error: missing "'" at end of file
   1376 ]])
   1377 
   1378 AT_DATA([three.y],
   1379 [[%%
   1380 start: 'abc';
   1381 start: 'abc
   1382 ]])
   1383 AT_CHECK([[$PERL -e "print 'start: \'abc';" >> three.y || exit 77]])
   1384 
   1385 AT_BISON_CHECK([three.y], [1], [],
   1386 [[three.y:2.8-12: warning: extra characters in character literal
   1387 three.y:3.8-4.0: warning: extra characters in character literal
   1388 three.y:3.8-4.0: error: missing "'" at end of line
   1389 three.y:4.8-11: warning: extra characters in character literal
   1390 three.y:4.8-11: error: missing "'" at end of file
   1391 ]])
   1392 
   1393 AT_CLEANUP
   1394 
   1395 ## ------------------------- ##
   1396 ## Bad escapes in literals.  ##
   1397 ## ------------------------- ##
   1398 
   1399 AT_SETUP([[Bad escapes in literals]])
   1400 
   1401 AT_DATA([input.y],
   1402 [[%%
   1403 start: '\777' '\0' '\xfff' '\x0'
   1404        '\uffff' '\u0000' '\Uffffffff' '\U00000000'
   1405        '\ ' '\A';
   1406 ]])
   1407 
   1408 # It is not easy to create special characters, we cannot even trust tr.
   1409 # Beside we cannot even expect "echo '\0'" to output two characters
   1410 # (well three with \n): at least Bash 3.2 converts the two-character
   1411 # sequence "\0" into a single NUL character.
   1412 AT_CHECK([[$PERL -e 'print "start: \"\\\t\\\f\\\0\\\1\" ;";' >> input.y \
   1413            || exit 77]])
   1414 
   1415 AT_BISON_CHECK([input.y], [1], [],
   1416 [[input.y:2.9-12: error: invalid number after \-escape: 777
   1417 input.y:2.8-13: warning: empty character literal
   1418 input.y:2.16-17: error: invalid number after \-escape: 0
   1419 input.y:2.15-18: warning: empty character literal
   1420 input.y:2.21-25: error: invalid number after \-escape: xfff
   1421 input.y:2.20-26: warning: empty character literal
   1422 input.y:2.29-31: error: invalid number after \-escape: x0
   1423 input.y:2.28-32: warning: empty character literal
   1424 input.y:3.9-14: error: invalid number after \-escape: uffff
   1425 input.y:3.8-15: warning: empty character literal
   1426 input.y:3.18-23: error: invalid number after \-escape: u0000
   1427 input.y:3.17-24: warning: empty character literal
   1428 input.y:3.27-36: error: invalid number after \-escape: Uffffffff
   1429 input.y:3.26-37: warning: empty character literal
   1430 input.y:3.40-49: error: invalid number after \-escape: U00000000
   1431 input.y:3.39-50: warning: empty character literal
   1432 input.y:4.9-10: error: invalid character after \-escape: ' '
   1433 input.y:4.8-11: warning: empty character literal
   1434 input.y:4.14-15: error: invalid character after \-escape: A
   1435 input.y:4.13-16: warning: empty character literal
   1436 input.y:5.9-16: error: invalid character after \-escape: \t
   1437 input.y:5.17: error: invalid character after \-escape: \f
   1438 input.y:5.18: error: invalid character after \-escape: \0
   1439 input.y:5.19: error: invalid character after \-escape: \001
   1440 ]])
   1441 
   1442 AT_CLEANUP
   1443 
   1444 ## ------------------------- ##
   1445 ## LAC: Errors for %define.  ##
   1446 ## ------------------------- ##
   1447 
   1448 AT_SETUP([[LAC: Errors for %define]])
   1449 
   1450 AT_DATA([[input.y]],
   1451 [[%%
   1452 start: ;
   1453 ]])
   1454 
   1455 # parse.lac.* options are useless if LAC isn't actually activated.
   1456 AT_BISON_CHECK([[-Dparse.lac.es-capacity-initial=1 input.y]],
   1457                [[1]], [],
   1458 [[<command line>:1: error: %define variable 'parse.lac.es-capacity-initial' is not used
   1459 ]])
   1460 AT_BISON_CHECK([[-Dparse.lac.memory-trace=full input.y]],
   1461                [[1]], [],
   1462 [[<command line>:1: error: %define variable 'parse.lac.memory-trace' is not used
   1463 ]])
   1464 
   1465 AT_CLEANUP
   1466 
   1467 ## --------------------------------------------- ##
   1468 ## -Werror is not affected by -Wnone and -Wall.  ##
   1469 ## --------------------------------------------- ##
   1470 
   1471 AT_SETUP([[-Werror is not affected by -Wnone and -Wall]])
   1472 
   1473 AT_DATA([[input.y]],
   1474 [[%%
   1475 foo-bar: ;
   1476 ]])
   1477 
   1478 # -Werror is not enabled by -Wall or equivalent.
   1479 AT_BISON_CHECK([[-Wall input.y]], [[0]], [[]],
   1480 [[input.y:2.1-7: warning: POSIX Yacc forbids dashes in symbol names: foo-bar
   1481 ]])
   1482 AT_BISON_CHECK([[-W input.y]], [[0]], [[]],
   1483 [[input.y:2.1-7: warning: POSIX Yacc forbids dashes in symbol names: foo-bar
   1484 ]])
   1485 AT_BISON_CHECK([[-Wno-none input.y]], [[0]], [[]],
   1486 [[input.y:2.1-7: warning: POSIX Yacc forbids dashes in symbol names: foo-bar
   1487 ]])
   1488 
   1489 # -Werror is not disabled by -Wnone or equivalent.
   1490 AT_BISON_CHECK([[-Werror,none,yacc input.y]], [[1]], [[]], [[stderr]])
   1491 AT_CHECK([[sed 's/^.*bison:/bison:/' stderr]], [[0]],
   1492 [[bison: warnings being treated as errors
   1493 input.y:2.1-7: warning: POSIX Yacc forbids dashes in symbol names: foo-bar
   1494 ]])
   1495 [mv stderr experr]
   1496 AT_BISON_CHECK([[-Werror,no-all,yacc input.y]], [[1]], [[]], [[experr]])
   1497 
   1498 AT_CLEANUP
   1499 
   1500 
   1501 ## ------------------------------------------------------ ##
   1502 ## %name-prefix and %define api.prefix are incompatible.  ##
   1503 ## ------------------------------------------------------ ##
   1504 
   1505 AT_SETUP([[%name-prefix and %define api.prefix are incompatible]])
   1506 
   1507 # AT_TEST(DIRECTIVES, OPTIONS, ERROR-LOCATION)
   1508 # --------------------------------------------
   1509 m4_pushdef([AT_TEST],
   1510 [AT_DATA([[input.y]],
   1511 [[$1
   1512 %%
   1513 exp:;
   1514 ]])
   1515 AT_BISON_CHECK([[$2 input.y]], [[1]], [[]],
   1516 [[$3: error: '%name-prefix' and '%define api.prefix' cannot be used together
   1517 ]])
   1518 ])
   1519 
   1520 AT_TEST([%define api.prefix foo %name-prefix "bar"], [], [input.y:1.9-18])
   1521 AT_TEST([], [-Dapi.prefix=foo -p bar], [<command line>:1])
   1522 AT_TEST([%name-prefix "bar"], [-Dapi.prefix=foo], [<command line>:1])
   1523 AT_TEST([%define api.prefix foo], [-p bar], [input.y:1.9-18])
   1524 
   1525 m4_popdef([AT_TEST])
   1526 
   1527 AT_CLEANUP
   1528 
   1529 
   1530 ## -------------- ##
   1531 ## Stray $ or @.  ##
   1532 ## -------------- ##
   1533 
   1534 AT_SETUP([[Stray $ or @]])
   1535 
   1536 # Give %printer and %destructor "<*> exp TOK" instead of "<*>" to
   1537 # check that the warnings are reported once, not three times.
   1538 
   1539 AT_DATA_GRAMMAR([[input.y]],
   1540 [[%token TOK
   1541 %destructor     { $%; @%; } <*> exp TOK;
   1542 %initial-action { $%; @%; };
   1543 %printer        { $%; @%; } <*> exp TOK;
   1544 %%
   1545 exp: TOK        { $%; @%; $$ = $1; };
   1546 ]])
   1547 
   1548 AT_BISON_CHECK([[input.y]], 0, [],
   1549 [[input.y:10.19: warning: stray '$'
   1550 input.y:10.23: warning: stray '@'
   1551 input.y:11.19: warning: stray '$'
   1552 input.y:11.23: warning: stray '@'
   1553 input.y:12.19: warning: stray '$'
   1554 input.y:12.23: warning: stray '@'
   1555 input.y:14.19: warning: stray '$'
   1556 input.y:14.23: warning: stray '@'
   1557 ]])
   1558 
   1559 AT_CLEANUP
   1560 
   1561 
   1562 
   1563 ## ---------------- ##
   1564 ## Code injection.  ##
   1565 ## ---------------- ##
   1566 
   1567 
   1568 AT_SETUP([[Code injection]])
   1569 
   1570 m4_pattern_allow([^m4_errprintn$])
   1571 
   1572 # AT_TEST([MACRO])
   1573 # ----------------
   1574 # Try to have MACRO be run by bison.
   1575 m4_pushdef([AT_TEST],
   1576 [AT_DATA([[input.y]],
   1577 [[%type <$1(DEAD %type)> exp
   1578 %token <$1(DEAD %token)> a
   1579 %initial-action
   1580 {
   1581   $$;
   1582   $<$1(DEAD %initial-action)>$
   1583 };
   1584 %printer
   1585 {
   1586   $$
   1587   $<$1(DEAD %printer)>$
   1588 } <> <*>;
   1589 %lex-param
   1590 {
   1591   $1(DEAD %lex-param)
   1592 };
   1593 %parse-param
   1594 {
   1595   $1(DEAD %parse-param)
   1596 };
   1597 %%
   1598 exp:
   1599   a a[last]
   1600   {
   1601     $$;
   1602     $][1;
   1603     $<$1(DEAD action 1)>$
   1604     $<$1(DEAD action 2)>1
   1605     $<$1(DEAD action 3)>last
   1606     $<$1(DEAD action 4)>0
   1607     ;
   1608   };
   1609 ]])
   1610 
   1611 # FIXME: Provide a means to iterate over all the skeletons.
   1612 AT_BISON_CHECK([[-d               input.y]])
   1613 AT_BISON_CHECK([[-d -S glr.c      input.y]])
   1614 AT_BISON_CHECK([[-d -S lalr1.cc   input.y]])
   1615 AT_BISON_CHECK([[-d -S glr.cc     input.y]])
   1616 AT_BISON_CHECK([[   -S lalr1.java input.y]])
   1617 ])
   1618 
   1619 AT_TEST([m4_errprintn])
   1620 AT_TEST([@:>@m4_errprintn])
   1621 
   1622 m4_popdef([AT_TEST])
   1623 
   1624 AT_CLEANUP
   1625