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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 AT_LALR1_CC_IF(
44 [%define "global_tokens_and_yystype"])[
45 %{
46 #include <stdio.h>
47
48 #include <stdlib.h>
49 #include <string.h>
50 #if HAVE_UNISTD_H
51 # include <unistd.h>
52 #else
53 # undef alarm
54 # define alarm(seconds) /* empty */
55 #endif
56 #include <ctype.h>
57
58 /* Exercise pre-prologue dependency to %union. */
59 typedef int semantic_value;
60
61 static semantic_value global_result = 0;
62 static int global_count = 0;
63 %}
64
65 /* Exercise %union. */
66 %union
67 {
68 semantic_value ival;
69 };
70
71 %{
72 static int power (int base, int exponent);
73 ]AT_LALR1_CC_IF(
74 [typedef yy::location YYLTYPE;
75 #define first_line begin.line
76 #define first_column begin.column
77 #define last_line end.line
78 #define last_column end.column
79 ],
80 [/* yyerror receives the location if:
81 - %location & %pure & %glr
82 - %location & %pure & %yacc & %parse-param. */
83 static void yyerror (AT_YYERROR_ARG_LOC_IF([YYLTYPE *llocp, ])
84 AT_PARAM_IF([semantic_value *result, int *count, ])
85 const char *s
86 );])[
87 static int yylex (]AT_LEX_FORMALS[);
88 static int get_char (]AT_LEX_FORMALS[);
89 static void unget_char (]AT_LEX_PRE_FORMALS[ int c);
90 %}
91
92 /* Bison Declarations */
93 %token CALC_EOF 0 "end of input"
94 %token <ival> NUM "number"
95 %type <ival> exp
96
97 %nonassoc '=' /* comparison */
98 %left '-' '+'
99 %left '*' '/'
100 %left NEG /* negation--unary minus */
101 %right '^' /* exponentiation */
102
103 /* Grammar follows */
104 %%
105 input:
106 line
107 | input line { ]AT_PARAM_IF([++*count; ++global_count;])[ }
108 ;
109
110 line:
111 '\n'
112 | exp '\n' { ]AT_PARAM_IF([*result = global_result = $1;])[ }
113 ;
114
115 exp:
116 NUM { $$ = $1; }
117 | exp '=' exp
118 {
119 if ($1 != $3)
120 fprintf (stderr, "calc: error: %d != %d\n", $1, $3);
121 $$ = $1;
122 }
123 | exp '+' exp { $$ = $1 + $3; }
124 | exp '-' exp { $$ = $1 - $3; }
125 | exp '*' exp { $$ = $1 * $3; }
126 | exp '/' exp { $$ = $1 / $3; }
127 | '-' exp %prec NEG { $$ = -$2; }
128 | exp '^' exp { $$ = power ($1, $3); }
129 | '(' exp ')' { $$ = $2; }
130 | '(' error ')' { $$ = 1111; }
131 | '!' { YYERROR; }
132 | '-' error { YYERROR; }
133 ;
134 %%
135 /* The input. */
136 static FILE *input;
137
138 ]AT_LALR1_CC_IF(
139 [/* A C++ error reporting function. */
140 void
141 yy::parser::error (const location& l, const std::string& m)
142 {
143 (void) l;
144 std::cerr << AT_LOCATION_IF([l << ": " << ])m << std::endl;
145 }
146
147 int
148 yyparse (AT_PARAM_IF([semantic_value *result, int *count]))
149 {
150 yy::parser parser[]AT_PARAM_IF([ (result, count)]);
151 parser.set_debug_level (!!YYDEBUG);
152 return parser.parse ();
153 }
154 ],
155 [static void
156 yyerror (AT_YYERROR_ARG_LOC_IF([YYLTYPE *llocp, ])
157 AT_PARAM_IF([semantic_value *result, int *count, ])
158 const char *s)
159 {
160 AT_PARAM_IF([(void) result; (void) count;])
161 AT_YYERROR_SEES_LOC_IF([
162 fprintf (stderr, "%d.%d",
163 AT_LOC.first_line, AT_LOC.first_column);
164 if (AT_LOC.first_line != AT_LOC.last_line)
165 fprintf (stderr, "-%d.%d",
166 AT_LOC.last_line, AT_LOC.last_column - 1);
167 else if (AT_LOC.first_column != AT_LOC.last_column - 1)
168 fprintf (stderr, "-%d",
169 AT_LOC.last_column - 1);
170 fprintf (stderr, ": ");])
171 fprintf (stderr, "%s\n", s);
172 }])[
173
174
175 ]AT_LOCATION_IF([
176 static YYLTYPE last_yylloc;
177 ])[
178 static int
179 get_char (]AT_LEX_FORMALS[)
180 {
181 int res = getc (input);
182 ]AT_USE_LEX_ARGS[;
183 ]AT_LOCATION_IF([
184 last_yylloc = AT_LOC;
185 if (res == '\n')
186 {
187 AT_LOC.last_line++;
188 AT_LOC.last_column = 0;
189 }
190 else
191 AT_LOC.last_column++;
192 ])[
193 return res;
194 }
195
196
197 static void
198 unget_char (]AT_LEX_PRE_FORMALS[ int c)
199 {
200 ]AT_USE_LEX_ARGS[;
201 ]AT_LOCATION_IF([
202 /* Wrong when C == `\n'. */
203 AT_LOC = last_yylloc;
204 ])[
205 ungetc (c, input);
206 }
207
208 static int
209 read_signed_integer (]AT_LEX_FORMALS[)
210 {
211 int c = get_char (]AT_LEX_ARGS[);
212 int sign = 1;
213 int n = 0;
214
215 ]AT_USE_LEX_ARGS[;
216 if (c == '-')
217 {
218 c = get_char (]AT_LEX_ARGS[);
219 sign = -1;
220 }
221
222 while (isdigit (c))
223 {
224 n = 10 * n + (c - '0');
225 c = get_char (]AT_LEX_ARGS[);
226 }
227
228 unget_char (]AT_LEX_PRE_ARGS[ c);
229
230 return sign * n;
231 }
232
233
234
235 /*---------------------------------------------------------------.
236 | Lexical analyzer returns an integer on the stack and the token |
237 | NUM, or the ASCII character read if not a number. Skips all |
238 | blanks and tabs, returns 0 for EOF. |
239 `---------------------------------------------------------------*/
240
241 static int
242 yylex (]AT_LEX_FORMALS[)
243 {
244 static int init = 1;
245 int c;
246
247 if (init)
248 {
249 init = 0;
250 ]AT_LOCATION_IF([
251 AT_LOC.last_column = 0;
252 AT_LOC.last_line = 1;
253 ])[
254 }
255
256 ]AT_LOCATION_IF([
257 AT_LOC.first_column = AT_LOC.last_column;
258 AT_LOC.first_line = AT_LOC.last_line;
259 ])[
260
261 /* Skip white space. */
262 while ((c = get_char (]AT_LEX_ARGS[)) == ' ' || c == '\t')
263 {
264 ]AT_LOCATION_IF(
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 unget_char (]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 input = fopen (argv[1], "r");
312 else
313 input = stdin;
314
315 if (!input)
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 /^Cleanup:/d
409 /^Error:/d
410 /^Next/d
411 /^Discarding/d
412 /^yydestructor:/d' stderr >at-stderr
413 mv at-stderr stderr
414 # 2. Create the reference error message.
415 AT_DATA([[expout]],
416 [$5
417 ])
418 # 3. If locations are not used, remove them.
419 AT_YYERROR_SEES_LOC_IF([],
420 [[sed 's/^[-0-9.]*: //' expout >at-expout
421 mv at-expout expout]])
422 # 4. If error-verbose is not used, strip the`, unexpected....' part.
423 m4_bmatch([$1], [%error-verbose], [],
424 [[sed 's/syntax error, .*$/syntax error/' expout >at-expout
425 mv at-expout expout]])
426 # 5. Check
427 AT_CHECK([cat stderr], 0, [expout])
428 ])
429
430
431 # AT_CHECK_CALC([BISON-OPTIONS, [EXPECTED-TO-FAIL]])
432 # --------------------------------------------------
433 # Start a testing chunk which compiles `calc' grammar with
434 # BISON-OPTIONS, and performs several tests over the parser.
435 # However, if EXPECTED-TO-FAIL is nonempty, this test is expected to fail.
436 m4_define([AT_CHECK_CALC],
437 [# We use integers to avoid dependencies upon the precision of doubles.
438 AT_SETUP([Calculator $1])
439
440 m4_ifval([$2], [AT_CHECK([exit 77])])
441
442 AT_BISON_OPTION_PUSHDEFS([$1])
443
444 AT_DATA_CALC_Y([$1])
445
446 AT_LALR1_CC_IF(
447 [AT_CHECK([bison -o calc.cc calc.y])
448 AT_COMPILE_CXX([calc])],
449 [AT_CHECK([bison -o calc.c calc.y])
450 AT_COMPILE([calc])])
451
452 # Test the priorities.
453 _AT_CHECK_CALC([$1],
454 [1 + 2 * 3 = 7
455 1 + 2 * -3 = -5
456
457 -1^2 = -1
458 (-1)^2 = 1
459
460 ---1 = -1
461
462 1 - 2 - 3 = -4
463 1 - (2 - 3) = 2
464
465 2^2^3 = 256
466 (2^2)^3 = 64],
467 [571])
468
469 # Some syntax errors.
470 _AT_CHECK_CALC_ERROR([$1], [1], [0 0], [13],
471 [1.2: syntax error, unexpected number])
472 _AT_CHECK_CALC_ERROR([$1], [1], [1//2], [18],
473 [1.2: syntax error, unexpected '/', expecting number or '-' or '(' or '!'])
474 _AT_CHECK_CALC_ERROR([$1], [1], [error], [5],
475 [1.0: syntax error, unexpected $undefined])
476 _AT_CHECK_CALC_ERROR([$1], [1], [1 = 2 = 3], [26],
477 [1.6: syntax error, unexpected '='])
478 _AT_CHECK_CALC_ERROR([$1], [1],
479 [
480 +1],
481 [16],
482 [2.0: syntax error, unexpected '+'])
483 # Exercise error messages with EOF: work on an empty file.
484 _AT_CHECK_CALC_ERROR([$1], [1], [/dev/null], [4],
485 [1.0: syntax error, unexpected end of input])
486
487 # Exercise the error token: without it, we die at the first error,
488 # hence be sure to
489 #
490 # - have several errors which exercise different shift/discardings
491 # - (): nothing to pop, nothing to discard
492 # - (1 + 1 + 1 +): a lot to pop, nothing to discard
493 # - (* * *): nothing to pop, a lot to discard
494 # - (1 + 2 * *): some to pop and discard
495 #
496 # - test the action associated to `error'
497 #
498 # - check the look-ahead that triggers an error is not discarded
499 # when we enter error recovery. Below, the look-ahead causing the
500 # first error is ")", which is needed to recover from the error and
501 # produce the "0" that triggers the "0 != 1" error.
502 #
503 _AT_CHECK_CALC_ERROR([$1], [0],
504 [() + (1 + 1 + 1 +) + (* * *) + (1 * 2 * *) = 1],
505 [189],
506 [1.1: syntax error, unexpected ')', expecting number or '-' or '(' or '!'
507 1.17: syntax error, unexpected ')', expecting number or '-' or '(' or '!'
508 1.22: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
509 1.40: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
510 calc: error: 4444 != 1])
511
512 # The same, but this time exercising explicitly triggered syntax errors.
513 # POSIX says the look-ahead causing the error should not be discarded.
514 _AT_CHECK_CALC_ERROR([$1], [0], [(!) + (0 0) = 1], [76],
515 [1.9: syntax error, unexpected number
516 calc: error: 2222 != 1])
517 _AT_CHECK_CALC_ERROR([$1], [0], [(- *) + (0 0) = 1], [86],
518 [1.3: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
519 1.11: syntax error, unexpected number
520 calc: error: 2222 != 1])
521 AT_BISON_OPTION_POPDEFS
522
523 AT_CLEANUP
524 ])# AT_CHECK_CALC
525
526
527
528
529 # ------------------------ #
530 # Simple LALR Calculator. #
531 # ------------------------ #
532
533 AT_BANNER([[Simple LALR Calculator.]])
534
535 # AT_CHECK_CALC_LALR([BISON-OPTIONS])
536 # -----------------------------------
537 # Start a testing chunk which compiles `calc' grammar with
538 # BISON-OPTIONS, and performs several tests over the parser.
539 m4_define([AT_CHECK_CALC_LALR],
540 [AT_CHECK_CALC($@)])
541
542 AT_CHECK_CALC_LALR()
543
544 AT_CHECK_CALC_LALR([%defines])
545 AT_CHECK_CALC_LALR([%locations])
546 AT_CHECK_CALC_LALR([%name-prefix="calc"])
547 AT_CHECK_CALC_LALR([%verbose])
548 AT_CHECK_CALC_LALR([%yacc])
549 AT_CHECK_CALC_LALR([%error-verbose])
550
551 AT_CHECK_CALC_LALR([%pure-parser %locations])
552 AT_CHECK_CALC_LALR([%error-verbose %locations])
553
554 AT_CHECK_CALC_LALR([%error-verbose %locations %defines %name-prefix="calc" %verbose %yacc])
555
556 AT_CHECK_CALC_LALR([%debug])
557 AT_CHECK_CALC_LALR([%error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])
558
559 AT_CHECK_CALC_LALR([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])
560
561 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}])
562
563
564 # ----------------------- #
565 # Simple GLR Calculator. #
566 # ----------------------- #
567
568 AT_BANNER([[Simple GLR Calculator.]])
569
570 # AT_CHECK_CALC_GLR([BISON-OPTIONS])
571 # ----------------------------------
572 # Start a testing chunk which compiles `calc' grammar with
573 # BISON-OPTIONS and %glr-parser, and performs several tests over the parser.
574 m4_define([AT_CHECK_CALC_GLR],
575 [AT_CHECK_CALC([%glr-parser] $@)])
576
577
578 AT_CHECK_CALC_GLR()
579
580 AT_CHECK_CALC_GLR([%defines])
581 AT_CHECK_CALC_GLR([%locations])
582 AT_CHECK_CALC_GLR([%name-prefix="calc"])
583 AT_CHECK_CALC_GLR([%verbose])
584 AT_CHECK_CALC_GLR([%yacc])
585 AT_CHECK_CALC_GLR([%error-verbose])
586
587 AT_CHECK_CALC_GLR([%pure-parser %locations])
588 AT_CHECK_CALC_GLR([%error-verbose %locations])
589
590 AT_CHECK_CALC_GLR([%error-verbose %locations %defines %name-prefix="calc" %verbose %yacc])
591
592 AT_CHECK_CALC_GLR([%debug])
593 AT_CHECK_CALC_GLR([%error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])
594
595 AT_CHECK_CALC_GLR([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])
596
597 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}])
598
599
600 # ----------------------------- #
601 # Simple LALR1 C++ Calculator. #
602 # ----------------------------- #
603
604 AT_BANNER([[Simple LALR1 C++ Calculator.]])
605
606 # AT_CHECK_CALC_LALR1_CC([BISON-OPTIONS])
607 # ---------------------------------------
608 # Start a testing chunk which compiles `calc' grammar with
609 # the C++ skeleton, and performs several tests over the parser.
610 m4_define([AT_CHECK_CALC_LALR1_CC],
611 [AT_CHECK_CALC([%skeleton "lalr1.cc"] $@)])
612
613 # AT_CHECK_CALC_LALR1_CC()
614
615 AT_CHECK_CALC_LALR1_CC([%defines %locations])
616
617 AT_CHECK_CALC_LALR1_CC([%defines])
618 # AT_CHECK_CALC_LALR1_CC([%locations])
619 # AT_CHECK_CALC_LALR1_CC([%name-prefix="calc"])
620 # AT_CHECK_CALC_LALR1_CC([%verbose])
621 # AT_CHECK_CALC_LALR1_CC([%yacc])
622 # AT_CHECK_CALC_LALR1_CC([%error-verbose])
623
624 # AT_CHECK_CALC_LALR1_CC([%pure-parser %locations])
625 # AT_CHECK_CALC_LALR1_CC([%error-verbose %locations])
626
627 AT_CHECK_CALC_LALR1_CC([%error-verbose %locations %defines %name-prefix="calc" %verbose %yacc])
628
629 # AT_CHECK_CALC_LALR1_CC([%debug])
630 AT_CHECK_CALC_LALR1_CC([%error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])
631
632 AT_CHECK_CALC_LALR1_CC([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])
633
634 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}])