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1 # Simple calculator. -*- Autotest -*-
2
3 # Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005 Free Software
4 # Foundation, Inc.
5
6 # This program is free software; you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation; either version 2, or (at your option)
9 # any later version.
10
11 # This program is distributed in the hope that it will be useful,
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 # GNU General Public License for more details.
15
16 # You should have received a copy of the GNU General Public License
17 # along with this program; if not, write to the Free Software
18 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19 # 02110-1301, USA.
20
21 ## ---------------------------------------------------- ##
22 ## Compile the grammar described in the documentation. ##
23 ## ---------------------------------------------------- ##
24
25
26 # ------------------------- #
27 # Helping Autotest macros. #
28 # ------------------------- #
29
30
31 # _AT_DATA_CALC_Y($1, $2, $3, [BISON-DIRECTIVES])
32 # -----------------------------------------------
33 # Produce `calc.y'. Don't call this macro directly, because it contains
34 # some occurrences of `$1' etc. which will be interpreted by m4. So
35 # you should call it with $1, $2, and $3 as arguments, which is what
36 # AT_DATA_CALC_Y does.
37 m4_define([_AT_DATA_CALC_Y],
38 [m4_if([$1$2$3], $[1]$[2]$[3], [],
39 [m4_fatal([$0: Invalid arguments: $@])])dnl
40 AT_DATA_GRAMMAR([calc.y],
41 [[/* Infix notation calculator--calc */
42 ]$4[
43 %{
44 #include <stdio.h>
45
46 #include <stdlib.h>
47 #include <string.h>
48 #if HAVE_UNISTD_H
49 # include <unistd.h>
50 #else
51 # undef alarm
52 # define alarm(seconds) /* empty */
53 #endif
54 #include <ctype.h>
55
56 /* Exercise pre-prologue dependency to %union. */
57 typedef int semantic_value;
58
59 static semantic_value global_result = 0;
60 static int global_count = 0;
61 %}
62
63 /* Exercise %union. */
64 %union
65 {
66 semantic_value ival;
67 };
68
69 %{
70 static int power (int base, int exponent);
71 ]AT_LALR1_CC_IF([typedef yy::location YYLTYPE;],
72 [/* yyerror receives the location if:
73 - %location & %pure & %glr
74 - %location & %pure & %yacc & %parse-param. */
75 static void yyerror (AT_YYERROR_ARG_LOC_IF([YYLTYPE *yylloc, ])
76 AT_PARAM_IF([semantic_value *result, int *count, ])
77 const char *s
78 );])[
79 static int yylex (]AT_LEX_FORMALS[);
80 static int yygetc (]AT_LEX_FORMALS[);
81 static void yyungetc (]AT_LEX_PRE_FORMALS[ int c);
82 %}
83
84 /* Bison Declarations */
85 %token CALC_EOF 0 "end of input"
86 %token <ival> NUM "number"
87 %type <ival> exp
88
89 %nonassoc '=' /* comparison */
90 %left '-' '+'
91 %left '*' '/'
92 %left NEG /* negation--unary minus */
93 %right '^' /* exponentiation */
94
95 /* Grammar follows */
96 %%
97 input:
98 line
99 | input line { ]AT_PARAM_IF([++*count; ++global_count;])[ }
100 ;
101
102 line:
103 '\n'
104 | exp '\n' { ]AT_PARAM_IF([*result = global_result = $1;])[ }
105 ;
106
107 exp:
108 NUM { $$ = $1; }
109 | exp '=' exp
110 {
111 if ($1 != $3)
112 fprintf (stderr, "calc: error: %d != %d\n", $1, $3);
113 $$ = $1;
114 }
115 | exp '+' exp { $$ = $1 + $3; }
116 | exp '-' exp { $$ = $1 - $3; }
117 | exp '*' exp { $$ = $1 * $3; }
118 | exp '/' exp { $$ = $1 / $3; }
119 | '-' exp %prec NEG { $$ = -$2; }
120 | exp '^' exp { $$ = power ($1, $3); }
121 | '(' exp ')' { $$ = $2; }
122 | '(' error ')' { $$ = 1111; }
123 | '!' { YYERROR; }
124 | '-' error { YYERROR; }
125 ;
126 %%
127 /* The input. */
128 static FILE *yyin;
129
130 ]AT_LALR1_CC_IF(
131 [/* A C++ error reporting function. */
132 void
133 yy::parser::error (const location& l, const std::string& m)
134 {
135 (void) l;
136 std::cerr << AT_LOCATION_IF([l << ": " << ])m << std::endl;
137 }
138
139 int
140 yyparse (AT_PARAM_IF([semantic_value *result, int *count]))
141 {
142 yy::parser parser[]AT_PARAM_IF([ (result, count)]);
143 parser.set_debug_level (!!YYDEBUG);
144 return parser.parse ();
145 }
146 ],
147 [static void
148 yyerror (AT_YYERROR_ARG_LOC_IF([YYLTYPE *yylloc, ])
149 AT_PARAM_IF([semantic_value *result, int *count, ])
150 const char *s)
151 {
152 AT_PARAM_IF([(void) result; (void) count;])
153 AT_YYERROR_SEES_LOC_IF([
154 fprintf (stderr, "%d.%d",
155 AT_LOC.first_line, AT_LOC.first_column);
156 if (AT_LOC.first_line != AT_LOC.last_line)
157 fprintf (stderr, "-%d.%d",
158 AT_LOC.last_line, AT_LOC.last_column - 1);
159 else if (AT_LOC.first_column != AT_LOC.last_column - 1)
160 fprintf (stderr, "-%d",
161 AT_LOC.last_column - 1);
162 fprintf (stderr, ": ");])
163 fprintf (stderr, "%s\n", s);
164 }])[
165
166
167 ]AT_LOCATION_IF([
168 static YYLTYPE last_yylloc;
169 ])[
170 static int
171 yygetc (]AT_LEX_FORMALS[)
172 {
173 int res = getc (yyin);
174 ]AT_USE_LEX_ARGS[;
175 ]AT_LOCATION_IF([
176 last_yylloc = AT_LOC;
177 if (res == '\n')
178 {
179 AT_LALR1_CC_IF(
180 [ AT_LOC.end.line++;
181 AT_LOC.end.column = 0;],
182 [ AT_LOC.last_line++;
183 AT_LOC.last_column = 0;])
184 }
185 else
186 AT_LALR1_CC_IF(
187 [ AT_LOC.end.column++;],
188 [ AT_LOC.last_column++;])
189 ])[
190 return res;
191 }
192
193
194 static void
195 yyungetc (]AT_LEX_PRE_FORMALS[ int c)
196 {
197 ]AT_USE_LEX_ARGS[;
198 ]AT_LOCATION_IF([
199 /* Wrong when C == `\n'. */
200 AT_LOC = last_yylloc;
201 ])[
202 ungetc (c, yyin);
203 }
204
205 static int
206 read_signed_integer (]AT_LEX_FORMALS[)
207 {
208 int c = yygetc (]AT_LEX_ARGS[);
209 int sign = 1;
210 int n = 0;
211
212 ]AT_USE_LEX_ARGS[;
213 if (c == '-')
214 {
215 c = yygetc (]AT_LEX_ARGS[);
216 sign = -1;
217 }
218
219 while (isdigit (c))
220 {
221 n = 10 * n + (c - '0');
222 c = yygetc (]AT_LEX_ARGS[);
223 }
224
225 yyungetc (]AT_LEX_PRE_ARGS[ c);
226
227 return sign * n;
228 }
229
230
231
232 /*---------------------------------------------------------------.
233 | Lexical analyzer returns an integer on the stack and the token |
234 | NUM, or the ASCII character read if not a number. Skips all |
235 | blanks and tabs, returns 0 for EOF. |
236 `---------------------------------------------------------------*/
237
238 static int
239 yylex (]AT_LEX_FORMALS[)
240 {
241 static int init = 1;
242 int c;
243
244 if (init)
245 {
246 init = 0;
247 ]AT_LALR1_CC_IF([],
248 [AT_LOCATION_IF([
249 AT_LOC.last_column = 0;
250 AT_LOC.last_line = 1;
251 ])])[
252 }
253
254 ]AT_LOCATION_IF([AT_LALR1_CC_IF(
255 [ AT_LOC.begin = AT_LOC.end;],
256 [ AT_LOC.first_column = AT_LOC.last_column;
257 AT_LOC.first_line = AT_LOC.last_line;
258 ])])[
259
260 /* Skip white space. */
261 while ((c = yygetc (]AT_LEX_ARGS[)) == ' ' || c == '\t')
262 {
263 ]AT_LOCATION_IF([AT_LALR1_CC_IF(
264 [ AT_LOC.begin = AT_LOC.end;],
265 [ AT_LOC.first_column = AT_LOC.last_column;
266 AT_LOC.first_line = AT_LOC.last_line;
267 ])])[
268 }
269
270 /* process numbers */
271 if (c == '.' || isdigit (c))
272 {
273 yyungetc (]AT_LEX_PRE_ARGS[ c);
274 ]AT_VAL[.ival = read_signed_integer (]AT_LEX_ARGS[);
275 return NUM;
276 }
277
278 /* Return end-of-file. */
279 if (c == EOF)
280 return CALC_EOF;
281
282 /* Return single chars. */
283 return c;
284 }
285
286 static int
287 power (int base, int exponent)
288 {
289 int res = 1;
290 if (exponent < 0)
291 exit (3);
292 for (/* Niente */; exponent; --exponent)
293 res *= base;
294 return res;
295 }
296
297
298 int
299 main (int argc, const char **argv)
300 {
301 semantic_value result = 0;
302 int count = 0;
303 int status;
304
305 /* This used to be alarm (10), but that isn't enough time for
306 a July 1995 vintage DEC Alphastation 200 4/100 system,
307 according to Nelson H. F. Beebe. 100 seconds is enough. */
308 alarm (100);
309
310 if (argc == 2)
311 yyin = fopen (argv[1], "r");
312 else
313 yyin = stdin;
314
315 if (!yyin)
316 {
317 perror (argv[1]);
318 return 3;
319 }
320
321 ]AT_LALR1_CC_IF([], [m4_bmatch([$4], [%debug],
322 [ yydebug = 1;])])[
323 status = yyparse (]AT_PARAM_IF([&result, &count])[);
324 if (global_result != result)
325 abort ();
326 if (global_count != count)
327 abort ();
328 return status;
329 }
330 ]])
331 ])# _AT_DATA_CALC_Y
332
333
334 # AT_DATA_CALC_Y([BISON-OPTIONS])
335 # -------------------------------
336 # Produce `calc.y'.
337 m4_define([AT_DATA_CALC_Y],
338 [_AT_DATA_CALC_Y($[1], $[2], $[3], [$1])
339 ])
340
341
342
343 # _AT_CHECK_CALC(BISON-OPTIONS, INPUT, [NUM-STDERR-LINES = 0])
344 # ------------------------------------------------------------
345 # Run `calc' on INPUT and expect no STDOUT nor STDERR.
346 #
347 # If BISON-OPTIONS contains `%debug' but not `%glr-parser', then
348 # NUM-STDERR-LINES is the number of expected lines on stderr.
349 #
350 # We don't count GLR's traces yet, since its traces are somewhat
351 # different from LALR's.
352 m4_define([_AT_CHECK_CALC],
353 [AT_DATA([[input]],
354 [[$2
355 ]])
356 AT_PARSER_CHECK([./calc input], 0, [], [stderr])
357 m4_bmatch([$1],
358 [%debug.*%glr\|%glr.*%debug],
359 [],
360 [%debug],
361 [AT_CHECK([wc -l <stderr | sed 's/[[^0-9]]//g'], 0, [$3
362 ])])
363 ])
364
365
366 # _AT_CHECK_CALC_ERROR(BISON-OPTIONS, EXIT-STATUS, INPUT,
367 # [NUM-DEBUG-LINES],
368 # [VERBOSE-AND-LOCATED-ERROR-MESSAGE])
369 # ---------------------------------------------------------
370 # Run `calc' on INPUT, and expect a `syntax error' message.
371 #
372 # If INPUT starts with a slash, it is used as absolute input file name,
373 # otherwise as contents.
374 #
375 # If BISON-OPTIONS contains `%location', then make sure the ERROR-LOCATION
376 # is correctly output on stderr.
377 #
378 # If BISON-OPTIONS contains `%error-verbose', then make sure the
379 # IF-YYERROR-VERBOSE message is properly output after `syntax error, '
380 # on STDERR.
381 #
382 # If BISON-OPTIONS contains `%debug' but not `%glr', then NUM-STDERR-LINES
383 # is the number of expected lines on stderr.
384 m4_define([_AT_CHECK_CALC_ERROR],
385 [m4_bmatch([$3], [^/],
386 [AT_PARSER_CHECK([./calc $3], $2, [], [stderr])],
387 [AT_DATA([[input]],
388 [[$3
389 ]])
390 AT_PARSER_CHECK([./calc input], $2, [], [stderr])])
391 m4_bmatch([$1],
392 [%debug.*%glr\|%glr.*%debug],
393 [],
394 [%debug],
395 [AT_CHECK([wc -l <stderr | sed 's/[[^0-9]]//g'], 0, [$4
396 ])])
397
398 # Normalize the observed and expected error messages, depending upon the
399 # options.
400 # 1. Remove the traces from observed.
401 sed '/^Starting/d
402 /^Entering/d
403 /^Stack/d
404 /^Reading/d
405 /^Reducing/d
406 /^Shifting/d
407 /^state/d
408 /^Error:/d
409 /^Next/d
410 /^Discarding/d
411 /^yydestructor:/d' stderr >at-stderr
412 mv at-stderr stderr
413 # 2. Create the reference error message.
414 AT_DATA([[expout]],
415 [$5
416 ])
417 # 3. If locations are not used, remove them.
418 AT_YYERROR_SEES_LOC_IF([],
419 [[sed 's/^[-0-9.]*: //' expout >at-expout
420 mv at-expout expout]])
421 # 4. If error-verbose is not used, strip the`, unexpected....' part.
422 m4_bmatch([$1], [%error-verbose], [],
423 [[sed 's/syntax error, .*$/syntax error/' expout >at-expout
424 mv at-expout expout]])
425 # 5. Check
426 AT_CHECK([cat stderr], 0, [expout])
427 ])
428
429
430 # AT_CHECK_CALC([BISON-OPTIONS [, EXPECTED-TO-FAIL]])
431 # ------------------------------
432 # Start a testing chunk which compiles `calc' grammar with
433 # BISON-OPTIONS, and performs several tests over the parser.
434 # However, if EXPECTED-TO-FAIL is nonempty, this test is expected to fail.
435 m4_define([AT_CHECK_CALC],
436 [# We use integers to avoid dependencies upon the precision of doubles.
437 AT_SETUP([Calculator $1])
438
439 m4_ifval([$2], [AT_CHECK([exit 77])])
440
441 AT_BISON_OPTION_PUSHDEFS([$1])
442
443 AT_DATA_CALC_Y([$1])
444
445 AT_LALR1_CC_IF(
446 [AT_CHECK([bison -o calc.cc calc.y])
447 AT_COMPILE_CXX([calc])],
448 [AT_CHECK([bison -o calc.c calc.y])
449 AT_COMPILE([calc])])
450
451 # Test the priorities.
452 _AT_CHECK_CALC([$1],
453 [1 + 2 * 3 = 7
454 1 + 2 * -3 = -5
455
456 -1^2 = -1
457 (-1)^2 = 1
458
459 ---1 = -1
460
461 1 - 2 - 3 = -4
462 1 - (2 - 3) = 2
463
464 2^2^3 = 256
465 (2^2)^3 = 64],
466 [571])
467
468 # Some syntax errors.
469 _AT_CHECK_CALC_ERROR([$1], [1], [0 0], [13],
470 [1.2: syntax error, unexpected number])
471 _AT_CHECK_CALC_ERROR([$1], [1], [1//2], [18],
472 [1.2: syntax error, unexpected '/', expecting number or '-' or '(' or '!'])
473 _AT_CHECK_CALC_ERROR([$1], [1], [error], [5],
474 [1.0: syntax error, unexpected $undefined])
475 _AT_CHECK_CALC_ERROR([$1], [1], [1 = 2 = 3], [26],
476 [1.6: syntax error, unexpected '='])
477 _AT_CHECK_CALC_ERROR([$1], [1],
478 [
479 +1],
480 [16],
481 [2.0: syntax error, unexpected '+'])
482 # Exercise error messages with EOF: work on an empty file.
483 _AT_CHECK_CALC_ERROR([$1], [1], [/dev/null], [4],
484 [1.0: syntax error, unexpected end of input])
485
486 # Exercise the error token: without it, we die at the first error,
487 # hence be sure to
488 #
489 # - have several errors which exercise different shift/discardings
490 # - (): nothing to pop, nothing to discard
491 # - (1 + 1 + 1 +): a lot to pop, nothing to discard
492 # - (* * *): nothing to pop, a lot to discard
493 # - (1 + 2 * *): some to pop and discard
494 #
495 # - test the action associated to `error'
496 #
497 # - check the look-ahead that triggers an error is not discarded
498 # when we enter error recovery. Below, the look-ahead causing the
499 # first error is ")", which is needed to recover from the error and
500 # produce the "0" that triggers the "0 != 1" error.
501 #
502 _AT_CHECK_CALC_ERROR([$1], [0],
503 [() + (1 + 1 + 1 +) + (* * *) + (1 * 2 * *) = 1],
504 [189],
505 [1.1: syntax error, unexpected ')', expecting number or '-' or '(' or '!'
506 1.17: syntax error, unexpected ')', expecting number or '-' or '(' or '!'
507 1.22: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
508 1.40: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
509 calc: error: 4444 != 1])
510
511 # The same, but this time exercising explicitly triggered syntax errors.
512 # POSIX says the look-ahead causing the error should not be discarded.
513 _AT_CHECK_CALC_ERROR([$1], [0], [(!) + (0 0) = 1], [76],
514 [1.9: syntax error, unexpected number
515 calc: error: 2222 != 1])
516 _AT_CHECK_CALC_ERROR([$1], [0], [(- *) + (0 0) = 1], [86],
517 [1.3: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
518 1.11: syntax error, unexpected number
519 calc: error: 2222 != 1])
520 AT_BISON_OPTION_POPDEFS
521
522 AT_CLEANUP
523 ])# AT_CHECK_CALC
524
525
526
527
528 # ------------------------ #
529 # Simple LALR Calculator. #
530 # ------------------------ #
531
532 AT_BANNER([[Simple LALR Calculator.]])
533
534 # AT_CHECK_CALC_LALR([BISON-OPTIONS])
535 # -----------------------------------
536 # Start a testing chunk which compiles `calc' grammar with
537 # BISON-OPTIONS, and performs several tests over the parser.
538 m4_define([AT_CHECK_CALC_LALR],
539 [AT_CHECK_CALC($@)])
540
541 AT_CHECK_CALC_LALR()
542
543 AT_CHECK_CALC_LALR([%defines])
544 AT_CHECK_CALC_LALR([%locations])
545 AT_CHECK_CALC_LALR([%name-prefix="calc"])
546 AT_CHECK_CALC_LALR([%verbose])
547 AT_CHECK_CALC_LALR([%yacc])
548 AT_CHECK_CALC_LALR([%error-verbose])
549
550 AT_CHECK_CALC_LALR([%pure-parser %locations])
551 AT_CHECK_CALC_LALR([%error-verbose %locations])
552
553 AT_CHECK_CALC_LALR([%error-verbose %locations %defines %name-prefix="calc" %verbose %yacc])
554
555 AT_CHECK_CALC_LALR([%debug])
556 AT_CHECK_CALC_LALR([%error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])
557
558 AT_CHECK_CALC_LALR([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])
559
560 AT_CHECK_CALC_LALR([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])
561
562
563 # ----------------------- #
564 # Simple GLR Calculator. #
565 # ----------------------- #
566
567 AT_BANNER([[Simple GLR Calculator.]])
568
569 # AT_CHECK_CALC_GLR([BISON-OPTIONS])
570 # ----------------------------------
571 # Start a testing chunk which compiles `calc' grammar with
572 # BISON-OPTIONS and %glr-parser, and performs several tests over the parser.
573 m4_define([AT_CHECK_CALC_GLR],
574 [AT_CHECK_CALC([%glr-parser] $@)])
575
576
577 AT_CHECK_CALC_GLR()
578
579 AT_CHECK_CALC_GLR([%defines])
580 AT_CHECK_CALC_GLR([%locations])
581 AT_CHECK_CALC_GLR([%name-prefix="calc"])
582 AT_CHECK_CALC_GLR([%verbose])
583 AT_CHECK_CALC_GLR([%yacc])
584 AT_CHECK_CALC_GLR([%error-verbose])
585
586 AT_CHECK_CALC_GLR([%pure-parser %locations])
587 AT_CHECK_CALC_GLR([%error-verbose %locations])
588
589 AT_CHECK_CALC_GLR([%error-verbose %locations %defines %name-prefix="calc" %verbose %yacc])
590
591 AT_CHECK_CALC_GLR([%debug])
592 AT_CHECK_CALC_GLR([%error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])
593
594 AT_CHECK_CALC_GLR([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])
595
596 AT_CHECK_CALC_GLR([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])
597
598
599 # ----------------------------- #
600 # Simple LALR1 C++ Calculator. #
601 # ----------------------------- #
602
603 AT_BANNER([[Simple LALR1 C++ Calculator.]])
604
605 # AT_CHECK_CALC_LALR1_CC([BISON-OPTIONS])
606 # ---------------------------------------
607 # Start a testing chunk which compiles `calc' grammar with
608 # the C++ skeleton, and performs several tests over the parser.
609 m4_define([AT_CHECK_CALC_LALR1_CC],
610 [AT_CHECK_CALC([%skeleton "lalr1.cc"] $@)])
611
612 # AT_CHECK_CALC_LALR1_CC()
613
614 AT_CHECK_CALC_LALR1_CC([%defines %locations])
615
616 AT_CHECK_CALC_LALR1_CC([%defines])
617 # AT_CHECK_CALC_LALR1_CC([%locations])
618 # AT_CHECK_CALC_LALR1_CC([%name-prefix="calc"])
619 # AT_CHECK_CALC_LALR1_CC([%verbose])
620 # AT_CHECK_CALC_LALR1_CC([%yacc])
621 # AT_CHECK_CALC_LALR1_CC([%error-verbose])
622
623 # AT_CHECK_CALC_LALR1_CC([%pure-parser %locations])
624 # AT_CHECK_CALC_LALR1_CC([%error-verbose %locations])
625
626 AT_CHECK_CALC_LALR1_CC([%error-verbose %locations %defines %name-prefix="calc" %verbose %yacc])
627
628 # AT_CHECK_CALC_LALR1_CC([%debug])
629 AT_CHECK_CALC_LALR1_CC([%error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])
630
631 AT_CHECK_CALC_LALR1_CC([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])
632
633 AT_CHECK_CALC_LALR1_CC([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])