tests/actions.at

   1 # Executing Actions.                               -*- Autotest -*-
   2 # Copyright 2001 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., 59 Temple Place - Suite 330, Boston, MA
  17 # 02111-1307, USA.
  18
  19 AT_BANNER([[User Actions.]])
  20
  21 ## ------------------ ##
  22 ## Mid-rule actions.  ##
  23 ## ------------------ ##
  24
  25 AT_SETUP([Mid-rule actions])
  26
  27 # Bison once forgot the mid-rule actions.  It was because the action
  28 # was attached to the host rule (the one with the mid-rule action),
  29 # instead of being attached to the empty rule dedicated to this
  30 # action.
  31
  32 AT_DATA([[input.y]],
  33 [[%{
  34 # include <stdio.h>
  35 # include <stdlib.h>
  36   static void yyerror (const char *msg);
  37   static int yylex (void);
  38 # define YYDEBUG         1
  39 # define YYERROR_VERBOSE 1
  40 %}
  41 %%
  42 exp:     { putchar ('0'); }
  43      '1' { putchar ('1'); }
  44      '2' { putchar ('2'); }
  45      '3' { putchar ('3'); }
  46      '4' { putchar ('4'); }
  47      '5' { putchar ('5'); }
  48      '6' { putchar ('6'); }
  49      '7' { putchar ('7'); }
  50      '8' { putchar ('8'); }
  51      '9' { putchar ('9'); }
  52          { putchar ('\n'); }
  53    ;
  54 %%
  55 static int
  56 yylex (void)
  57 {
  58   static const char *input = "123456789";
  59   return *input++;
  60 }
  61
  62 static void
  63 yyerror (const char *msg)
  64 {
  65   fprintf (stderr, "%s\n", msg);
  66 }
  67
  68 int
  69 main (void)
  70 {
  71   return yyparse ();
  72 }
  73 ]])
  74
  75 AT_CHECK([bison input.y -d -v -o input.c])
  76 AT_COMPILE([input])
  77 AT_PARSER_CHECK([./input], 0,
  78 [[0123456789
  79 ]])
  80
  81 AT_CLEANUP
  82
  83
  84
  85 ## ---------------- ##
  86 ## Exotic Dollars.  ##
  87 ## ---------------- ##
  88
  89 AT_SETUP([Exotic Dollars])
  90
  91 AT_DATA([[input.y]],
  92 [[%{
  93 # include <stdio.h>
  94 # include <stdlib.h>
  95   static void yyerror (const char *msg);
  96   static int yylex (void);
  97 # define YYDEBUG         1
  98 # define YYERROR_VERBOSE 1
  99 %}
 100
 101 %union
 102 {
 103   int val;
 104 };
 105
 106 %type <val> a_1 a_2 a_4 a_5
 107             sum_of_the_five_previous_values
 108
 109 %%
 110 exp: a_1 a_2 { $<val>$ = 3; } a_4 a_5 sum_of_the_five_previous_values
 111     {
 112        printf ("%d\n", $6);
 113     }
 114 ;
 115 a_1: { $$ = 1; };
 116 a_2: { $$ = 2; };
 117 a_4: { $$ = 4; };
 118 a_5: { $$ = 5; };
 119
 120 sum_of_the_five_previous_values:
 121     {
 122        $$ = $<val>0 + $<val>-1 + $<val>-2 + $<val>-3 + $<val>-4;
 123     }
 124 ;
 125
 126 %%
 127 static int
 128 yylex (void)
 129 {
 130   return EOF;
 131 }
 132
 133 static void
 134 yyerror (const char *msg)
 135 {
 136   fprintf (stderr, "%s\n", msg);
 137 }
 138
 139 int
 140 main (void)
 141 {
 142   return yyparse ();
 143 }
 144 ]])
 145
 146 AT_CHECK([bison input.y -d -v -o input.c])
 147 AT_COMPILE([input])
 148 AT_PARSER_CHECK([./input], 0,
 149 [[15
 150 ]])
 151
 152 AT_CLEANUP
 153
 154
 155
 156 ## -------------------------- ##
 157 ## Printers and Destructors.  ##
 158 ## -------------------------- ##
 159
 160 AT_SETUP([Printers and Destructors])
 161
 162 # Make sure complex $n work.
 163
 164 AT_DATA([[input.y]],
 165 [[%{
 166 #include <stdio.h>
 167 #include <stdlib.h>
 168 #include <assert.h>
 169
 170 #define YYERROR_VERBOSE 1
 171 #define YYDEBUG 1
 172 %}
 173 %verbose
 174 %union
 175 {
 176   int ival;
 177 }
 178 %type <ival> 'x' thing line input
 179
 180 %printer { fprintf (yyout, "%d from %d", $$, @$.first_line); }
 181    input line thing 'x'
 182
 183 %destructor
 184   {
 185     fprintf (stdout, "Freeing ");
 186     /* FIXME: Ouch: INTERNAL DETAILS EXPOSED HERE. */
 187     /* Cannot use $$ which is the union member, not the union itself. */
 188     yysymprint (stdout, yytype, yyvalue, @$);
 189     fprintf (stdout, "\n");
 190   }
 191   input line thing 'x'
 192
 193 %{
 194 static int yylex (void);
 195 static void yyerror (const char *msg);
 196 %}
 197
 198
 199 %%
 200 input:
 201   /* Nothing. */
 202     {
 203       $$ = 0;
 204       printf ("input(%d): /* Nothing */';'\n", $$);
 205     }
 206 | line input /* Right recursive to load the stack so that popping at
 207                 EOF can be exercised.  */
 208     {
 209       $$ = 2;
 210       printf ("input(%d): line(%d) input(%d)';'\n", $$, $1, $2);
 211     }
 212 ;
 213
 214 line:
 215   thing thing thing ';'
 216     {
 217       $$ = $1;
 218       printf ("line(%d): thing(%d) thing(%d) thing(%d) ';'\n", $$, $1, $2, $3);
 219     }
 220 | thing thing ';'
 221     {
 222       $$ = $1;
 223       printf ("line(%d): thing(%d) thing(%d) ';'\n", $$, $1, $2);
 224     }
 225 | thing ';'
 226     {
 227       $$ = $1;
 228       printf ("line(%d): thing(%d) ';'\n", $$, $1);
 229     }
 230 | error ';'
 231     {
 232       $$ = -1;
 233       printf ("line(%d): error ';'\n", $$);
 234     }
 235 ;
 236
 237 thing:
 238   'x'
 239     {
 240       $$ = $1;
 241       printf ("thing(%d): 'x'(%d)\n", $$, $1);
 242     }
 243 ;
 244 %%
 245 static int
 246 yylex (void)
 247 {
 248   static const unsigned int input[] =
 249     {
 250       /* Exericise the discarding of stack top and input until `error'
 251          can be reduced.  */
 252       'x', 'x', 'x', 'x', 'x', 'x', ';',
 253
 254       /* Load the stack and provoke an error that cannot be caught by
 255          the grammar, to check that the stack is cleared. */
 256       'x', 'x', ';',
 257       'x', ';',
 258       'y'
 259     };
 260   static unsigned int counter = 0;
 261
 262   if (counter < (sizeof(input) / sizeof (input[0])))
 263     {
 264        yylval.ival = counter;
 265        /* As in BASIC, line numbers go from 10 to 10.  */
 266        yylloc.first_line = 10 * counter;
 267        printf ("sending: '%c' (value = %d, line %d)\n",
 268                input[counter], yylval.ival, yylloc.first_line);
 269        return (int) input[counter++];
 270     }
 271   else
 272     {
 273       printf ("sending: EOF\n");
 274       return EOF;
 275     }
 276 }
 277
 278 static void
 279 yyerror (const char *msg)
 280 {
 281   fprintf (stdout, "%d: %s\n", yylloc.first_line, msg);
 282 }
 283
 284 int
 285 main (void)
 286 {
 287   yydebug = !!getenv ("YYDEBUG");
 288   if (yyparse ())
 289     {
 290       fprintf (stdout, "Parsing FAILED.\n");
 291       exit (1);
 292     }
 293   fprintf (stdout, "Successful parse.\n");
 294   return 0;
 295 }
 296 ]])
 297
 298 AT_CHECK([bison input.y --location -d -v -o input.c])
 299 AT_COMPILE([input])
 300 AT_PARSER_CHECK([./input], 1,
 301 [[sending: 'x' (value = 0, line 0)
 302 thing(0): 'x'(0)
 303 sending: 'x' (value = 1, line 10)
 304 thing(1): 'x'(1)
 305 sending: 'x' (value = 2, line 20)
 306 thing(2): 'x'(2)
 307 sending: 'x' (value = 3, line 30)
 308 30: parse error, unexpected 'x', expecting ';'
 309 Freeing nterm thing (2 from 20)
 310 Freeing nterm thing (1 from 10)
 311 Freeing nterm thing (0 from 0)
 312 Freeing token 'x' (3 from 30)
 313 sending: 'x' (value = 4, line 40)
 314 Freeing token 'x' (4 from 40)
 315 sending: 'x' (value = 5, line 50)
 316 Freeing token 'x' (5 from 50)
 317 sending: ';' (value = 6, line 60)
 318 line(-1): error ';'
 319 sending: 'x' (value = 7, line 70)
 320 thing(7): 'x'(7)
 321 sending: 'x' (value = 8, line 80)
 322 thing(8): 'x'(8)
 323 sending: ';' (value = 9, line 90)
 324 line(7): thing(7) thing(8) ';'
 325 sending: 'x' (value = 10, line 100)
 326 thing(10): 'x'(10)
 327 sending: ';' (value = 11, line 110)
 328 line(10): thing(10) ';'
 329 sending: 'y' (value = 12, line 120)
 330 120: parse error, unexpected $undefined, expecting $end or 'x'
 331 sending: EOF
 332 Freeing nterm line (10 from 100)
 333 Freeing nterm line (7 from 70)
 334 Freeing nterm line (-1 from 50)
 335 Parsing FAILED.
 336 ]])
 337
 338 AT_CLEANUP