1 # Simple calculator. -*- Autotest -*-
3 # Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
4 # 2009 Free Software Foundation, Inc.
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 3 of the License, or
9 # (at your option) any later version.
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.
16 # You should have received a copy of the GNU General Public License
17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
19 ## ---------------------------------------------------- ##
20 ## Compile the grammar described in the documentation. ##
21 ## ---------------------------------------------------- ##
24 # ------------------------- #
25 # Helping Autotest macros. #
26 # ------------------------- #
29 # _AT_DATA_CALC_Y($1, $2, $3, [BISON-DIRECTIVES])
30 # -----------------------------------------------
31 # Produce `calc.y' and, if %defines was specified, `calc-lex.c' or
34 # Don't call this macro directly, because it contains some occurrences
35 # of `$1' etc. which will be interpreted by m4. So you should call it
36 # with $1, $2, and $3 as arguments, which is what 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 m4_pushdef([AT_CALC_LEX],
43 int ]AT_NAME_PREFIX[lex (]AT_LEX_FORMALS[);
44 static int get_char (]AT_LEX_FORMALS[);
45 static void unget_char (]AT_LEX_PRE_FORMALS[ int c);
48 static YYLTYPE last_yylloc;
51 get_char (]AT_LEX_FORMALS[)
53 int res = getc (input);
60 AT_LOC.last_column = 1;
69 unget_char (]AT_LEX_PRE_FORMALS[ int c)
73 /* Wrong when C == `\n'. */
80 read_signed_integer (]AT_LEX_FORMALS[)
82 int c = get_char (]AT_LEX_ARGS[);
89 c = get_char (]AT_LEX_ARGS[);
95 n = 10 * n + (c - '0');
96 c = get_char (]AT_LEX_ARGS[);
99 unget_char (]AT_LEX_PRE_ARGS[ c);
105 /*---------------------------------------------------------------.
106 | Lexical analyzer returns an integer on the stack and the token |
107 | NUM, or the ASCII character read if not a number. Skips all |
108 | blanks and tabs, returns 0 for EOF. |
109 `---------------------------------------------------------------*/
112 ]AT_NAME_PREFIX[lex (]AT_LEX_FORMALS[)
121 AT_LOC.last_column = 1;
122 AT_LOC.last_line = 1;
127 AT_LOC.first_column = AT_LOC.last_column;
128 AT_LOC.first_line = AT_LOC.last_line;
131 /* Skip white space. */
132 while ((c = get_char (]AT_LEX_ARGS[)) == ' ' || c == '\t')
135 [ AT_LOC.first_column = AT_LOC.last_column;
136 AT_LOC.first_line = AT_LOC.last_line;
140 /* process numbers */
141 if (c == '.' || isdigit (c))
143 unget_char (]AT_LEX_PRE_ARGS[ c);
144 ]AT_VAL[.ival = read_signed_integer (]AT_LEX_ARGS[);
148 /* Return end-of-file. */
152 /* Return single chars. */
157 AT_DATA_GRAMMAR([calc.y],
158 [[/* Infix notation calculator--calc */
161 [%define global_tokens_and_yystype])[
163 /* Exercise pre-prologue dependency to %union. */
164 typedef int semantic_value;
167 /* Exercise %union. */
176 extern FILE *input;]AT_SKEL_CC_IF([[
178 # define YYLTYPE ]AT_NAME_PREFIX[::location
180 #define first_line begin.line
181 #define first_column begin.column
182 #define last_line end.line
183 #define last_column end.column]])[
193 # define alarm(seconds) /* empty */
198 static semantic_value global_result = 0;
199 static int global_count = 0;
200 static int power (int base, int exponent);
202 [/* yyerror receives the location if:
203 - %location & %pure & %glr
204 - %location & %pure & %yacc & %parse-param. */
205 static void yyerror (AT_YYERROR_ARG_LOC_IF([YYLTYPE *llocp, ])
206 AT_PARAM_IF([semantic_value *result, int *count, ])
209 int yylex (]AT_LEX_FORMALS[);
213 [/* The lalr1.cc skeleton, for backward compatibility, defines
214 a constructor for position that initializes the filename. The
215 glr.cc skeleton does not (and in fact cannot: location/position
216 are stored in a union, from which objects with constructors are
223 /* Bison Declarations */
224 %token CALC_EOF 0 "end of input"
225 %token <ival> NUM "number"
228 %nonassoc '=' /* comparison */
231 %left NEG /* negation--unary minus */
232 %right '^' /* exponentiation */
234 /* Grammar follows */
238 | input line { ]AT_PARAM_IF([++*count; ++global_count;])[ }
243 | exp '\n' { ]AT_PARAM_IF([*result = global_result = $1], [USE ($1)])[; }
251 fprintf (stderr, "calc: error: %d != %d\n", $1, $3);
254 | exp '+' exp { $$ = $1 + $3; }
255 | exp '-' exp { $$ = $1 - $3; }
256 | exp '*' exp { $$ = $1 * $3; }
257 | exp '/' exp { $$ = $1 / $3; }
258 | '-' exp %prec NEG { $$ = -$2; }
259 | exp '^' exp { $$ = power ($1, $3); }
260 | '(' exp ')' { $$ = $2; }
261 | '(' error ')' { $$ = 1111; yyerrok; }
262 | '!' { $$ = 0; YYERROR; }
263 | '-' error { $$ = 0; YYERROR; }
268 [/* A C++ error reporting function. */
270 AT_NAME_PREFIX::parser::error (const location& l, const std::string& m)
273 std::cerr << AT_LOCATION_IF([l << ": " << ])m << std::endl;
277 yyparse (AT_PARAM_IF([semantic_value *result, int *count]))
279 AT_NAME_PREFIX::parser parser[]AT_PARAM_IF([ (result, count)]);
281 parser.set_debug_level (1);
283 return parser.parse ();
287 yyerror (AT_YYERROR_ARG_LOC_IF([YYLTYPE *llocp, ])
288 AT_PARAM_IF([semantic_value *result, int *count, ])
291 AT_PARAM_IF([(void) result; (void) count;])
292 AT_YYERROR_SEES_LOC_IF([
293 fprintf (stderr, "%d.%d",
294 AT_LOC.first_line, AT_LOC.first_column);
295 if (AT_LOC.first_line != AT_LOC.last_line)
296 fprintf (stderr, "-%d.%d",
297 AT_LOC.last_line, AT_LOC.last_column - 1);
298 else if (AT_LOC.first_column != AT_LOC.last_column - 1)
299 fprintf (stderr, "-%d",
300 AT_LOC.last_column - 1);
301 fprintf (stderr, ": ");])
302 fprintf (stderr, "%s\n", s);
305 ]AT_DEFINES_IF(, [AT_CALC_LEX])[
308 power (int base, int exponent)
313 for (/* Niente */; exponent; --exponent)
320 main (int argc, const char **argv)
322 semantic_value result = 0;
326 /* This used to be alarm (10), but that isn't enough time for
327 a July 1995 vintage DEC Alphastation 200 4/100 system,
328 according to Nelson H. F. Beebe. 100 seconds is enough. */
332 input = fopen (argv[1], "r");
342 ]AT_SKEL_CC_IF([], [m4_bmatch([$4], [%debug],
344 status = yyparse (]AT_PARAM_IF([[&result, &count]])[);
346 if (global_result != result)
348 if (global_count != count)
353 AT_DEFINES_IF([AT_DATA_SOURCE([[calc-lex.c]AT_SKEL_CC_IF([[c]])],
354 [[#include "calc.h]AT_SKEL_CC_IF([[h]])["
357 m4_popdef([AT_CALC_LEX])
361 # AT_DATA_CALC_Y([BISON-OPTIONS])
362 # -------------------------------
363 # Produce `calc.y' and, if %defines was specified, `calc-lex.c' or
365 m4_define([AT_DATA_CALC_Y],
366 [_AT_DATA_CALC_Y($[1], $[2], $[3], [$1])
371 # _AT_CHECK_CALC(BISON-OPTIONS, INPUT, [NUM-STDERR-LINES])
372 # --------------------------------------------------------
373 # Run `calc' on INPUT and expect no STDOUT nor STDERR.
375 # If BISON-OPTIONS contains `%debug' but not `%glr-parser', then
377 # NUM-STDERR-LINES is the number of expected lines on stderr.
378 # Currently this is ignored, though, since the output format is fluctuating.
380 # We don't count GLR's traces yet, since its traces are somewhat
381 # different from LALR's.
382 m4_define([_AT_CHECK_CALC],
386 AT_PARSER_CHECK([./calc input], 0, [], [stderr])
390 # _AT_CHECK_CALC_ERROR(BISON-OPTIONS, EXIT-STATUS, INPUT,
391 # [NUM-STDERR-LINES],
392 # [VERBOSE-AND-LOCATED-ERROR-MESSAGE])
393 # ---------------------------------------------------------
394 # Run `calc' on INPUT, and expect a `syntax error' message.
396 # If INPUT starts with a slash, it is used as absolute input file name,
397 # otherwise as contents.
399 # NUM-STDERR-LINES is the number of expected lines on stderr.
400 # Currently this is ignored, though, since the output format is fluctuating.
402 # If BISON-OPTIONS contains `%location', then make sure the ERROR-LOCATION
403 # is correctly output on stderr.
405 # If BISON-OPTIONS contains `%error-verbose', then make sure the
406 # IF-YYERROR-VERBOSE message is properly output after `syntax error, '
409 # If BISON-OPTIONS contains `%debug' but not `%glr', then NUM-STDERR-LINES
410 # is the number of expected lines on stderr.
411 m4_define([_AT_CHECK_CALC_ERROR],
412 [m4_bmatch([$3], [^/],
413 [AT_PARSER_CHECK([./calc $3], $2, [], [stderr])],
417 AT_PARSER_CHECK([./calc input], $2, [], [stderr])])
419 # Normalize the observed and expected error messages, depending upon the
421 # 1. Remove the traces from observed.
436 /^yydestructor:/d' stderr >at-stderr
438 # 2. Create the reference error message.
442 # 3. If locations are not used, remove them.
443 AT_YYERROR_SEES_LOC_IF([],
444 [[sed 's/^[-0-9.]*: //' expout >at-expout
445 mv at-expout expout]])
446 # 4. If error-verbose is not used, strip the`, unexpected....' part.
447 m4_bmatch([$1], [%error-verbose], [],
448 [[sed 's/syntax error, .*$/syntax error/' expout >at-expout
449 mv at-expout expout]])
451 AT_CHECK([cat stderr], 0, [expout])
455 # AT_CHECK_CALC([BISON-OPTIONS, [EXPECTED-TO-FAIL]])
456 # --------------------------------------------------
457 # Start a testing chunk which compiles `calc' grammar with
458 # BISON-OPTIONS, and performs several tests over the parser.
459 # However, if EXPECTED-TO-FAIL is nonempty, this test is expected to fail.
460 m4_define([AT_CHECK_CALC],
461 [# We use integers to avoid dependencies upon the precision of doubles.
462 AT_SETUP([Calculator $1])
464 m4_ifval([$2], [AT_CHECK([exit 77])])
466 AT_BISON_OPTION_PUSHDEFS([$1])
469 AT_FULL_COMPILE([calc], [AT_DEFINES_IF([[lex]])])
471 # Test the priorities.
488 # Some syntax errors.
489 _AT_CHECK_CALC_ERROR([$1], [1], [0 0], [15],
490 [1.3: syntax error, unexpected number])
491 _AT_CHECK_CALC_ERROR([$1], [1], [1//2], [20],
492 [1.3: syntax error, unexpected '/', expecting number or '-' or '(' or '!'])
493 _AT_CHECK_CALC_ERROR([$1], [1], [error], [5],
494 [1.1: syntax error, unexpected $undefined])
495 _AT_CHECK_CALC_ERROR([$1], [1], [1 = 2 = 3], [30],
496 [1.7: syntax error, unexpected '='])
497 _AT_CHECK_CALC_ERROR([$1], [1],
501 [2.1: syntax error, unexpected '+'])
502 # Exercise error messages with EOF: work on an empty file.
503 _AT_CHECK_CALC_ERROR([$1], [1], [/dev/null], [4],
504 [1.1: syntax error, unexpected end of input])
506 # Exercise the error token: without it, we die at the first error,
509 # - have several errors which exercise different shift/discardings
510 # - (): nothing to pop, nothing to discard
511 # - (1 + 1 + 1 +): a lot to pop, nothing to discard
512 # - (* * *): nothing to pop, a lot to discard
513 # - (1 + 2 * *): some to pop and discard
515 # - test the action associated to `error'
517 # - check the lookahead that triggers an error is not discarded
518 # when we enter error recovery. Below, the lookahead causing the
519 # first error is ")", which is needed to recover from the error and
520 # produce the "0" that triggers the "0 != 1" error.
522 _AT_CHECK_CALC_ERROR([$1], [0],
523 [() + (1 + 1 + 1 +) + (* * *) + (1 * 2 * *) = 1],
525 [1.2: syntax error, unexpected ')', expecting number or '-' or '(' or '!'
526 1.18: syntax error, unexpected ')', expecting number or '-' or '(' or '!'
527 1.23: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
528 1.41: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
529 calc: error: 4444 != 1])
531 # The same, but this time exercising explicitly triggered syntax errors.
532 # POSIX says the lookahead causing the error should not be discarded.
533 _AT_CHECK_CALC_ERROR([$1], [0], [(!) + (0 0) = 1], [102],
534 [1.10: syntax error, unexpected number
535 calc: error: 2222 != 1])
536 _AT_CHECK_CALC_ERROR([$1], [0], [(- *) + (0 0) = 1], [113],
537 [1.4: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
538 1.12: syntax error, unexpected number
539 calc: error: 2222 != 1])
541 # Check that yyerrok works properly: second error is not reported,
542 # third and fourth are. Parse status is succesfull.
543 _AT_CHECK_CALC_ERROR([$1], [0], [(* *) + (*) + (*)], [113],
544 [1.2: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
545 1.10: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
546 1.16: syntax error, unexpected '*', expecting number or '-' or '(' or '!'])
548 AT_BISON_OPTION_POPDEFS
556 # ------------------------ #
557 # Simple LALR Calculator. #
558 # ------------------------ #
560 AT_BANNER([[Simple LALR(1) Calculator.]])
562 # AT_CHECK_CALC_LALR([BISON-OPTIONS])
563 # -----------------------------------
564 # Start a testing chunk which compiles `calc' grammar with
565 # BISON-OPTIONS, and performs several tests over the parser.
566 m4_define([AT_CHECK_CALC_LALR],
571 AT_CHECK_CALC_LALR([%defines])
572 AT_CHECK_CALC_LALR([%locations])
573 AT_CHECK_CALC_LALR([%name-prefix="calc"]) dnl test deprecated `='
574 AT_CHECK_CALC_LALR([%verbose])
575 AT_CHECK_CALC_LALR([%yacc])
576 AT_CHECK_CALC_LALR([%error-verbose])
578 AT_CHECK_CALC_LALR([%define api.pure %locations])
579 AT_CHECK_CALC_LALR([%define api.push-pull both %define api.pure %locations])
580 AT_CHECK_CALC_LALR([%error-verbose %locations])
582 AT_CHECK_CALC_LALR([%error-verbose %locations %defines %name-prefix "calc" %verbose %yacc])
584 AT_CHECK_CALC_LALR([%debug])
585 AT_CHECK_CALC_LALR([%error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
587 AT_CHECK_CALC_LALR([%define api.pure %error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
588 AT_CHECK_CALC_LALR([%define api.push-pull both %define api.pure %error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
590 AT_CHECK_CALC_LALR([%define api.pure %error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])
593 # ----------------------- #
594 # Simple GLR Calculator. #
595 # ----------------------- #
597 AT_BANNER([[Simple GLR Calculator.]])
599 # AT_CHECK_CALC_GLR([BISON-OPTIONS])
600 # ----------------------------------
601 # Start a testing chunk which compiles `calc' grammar with
602 # BISON-OPTIONS and %glr-parser, and performs several tests over the parser.
603 m4_define([AT_CHECK_CALC_GLR],
604 [AT_CHECK_CALC([%glr-parser] $@)])
609 AT_CHECK_CALC_GLR([%defines])
610 AT_CHECK_CALC_GLR([%locations])
611 AT_CHECK_CALC_GLR([%name-prefix "calc"])
612 AT_CHECK_CALC_GLR([%verbose])
613 AT_CHECK_CALC_GLR([%yacc])
614 AT_CHECK_CALC_GLR([%error-verbose])
616 AT_CHECK_CALC_GLR([%define api.pure %locations])
617 AT_CHECK_CALC_GLR([%error-verbose %locations])
619 AT_CHECK_CALC_GLR([%error-verbose %locations %defines %name-prefix "calc" %verbose %yacc])
621 AT_CHECK_CALC_GLR([%debug])
622 AT_CHECK_CALC_GLR([%error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
624 AT_CHECK_CALC_GLR([%define api.pure %error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
626 AT_CHECK_CALC_GLR([%define api.pure %error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])
629 # ----------------------------- #
630 # Simple LALR1 C++ Calculator. #
631 # ----------------------------- #
633 AT_BANNER([[Simple LALR(1) C++ Calculator.]])
635 # First let's try using %skeleton
636 AT_CHECK_CALC([%skeleton "lalr1.cc" %defines %locations])
638 # AT_CHECK_CALC_LALR1_CC([BISON-OPTIONS])
639 # ---------------------------------------
640 # Start a testing chunk which compiles `calc' grammar with
641 # the C++ skeleton, and performs several tests over the parser.
642 m4_define([AT_CHECK_CALC_LALR1_CC],
643 [AT_CHECK_CALC([%language "C++" %defines %locations] $@)])
645 AT_CHECK_CALC_LALR1_CC([])
646 AT_CHECK_CALC_LALR1_CC([%error-verbose %name-prefix "calc" %verbose %yacc])
648 AT_CHECK_CALC_LALR1_CC([%error-verbose %debug %name-prefix "calc" %verbose %yacc])
650 AT_CHECK_CALC_LALR1_CC([%pure-parser %error-verbose %debug %name-prefix "calc" %verbose %yacc])
652 AT_CHECK_CALC_LALR1_CC([%pure-parser %error-verbose %debug %name-prefix "calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])
656 # --------------------------- #
657 # Simple GLR C++ Calculator. #
658 # --------------------------- #
660 AT_BANNER([[Simple GLR C++ Calculator.]])
662 # Again, we try also using %skeleton.
663 AT_CHECK_CALC([%skeleton "glr.cc" %defines %locations])
665 # AT_CHECK_CALC_GLR_CC([BISON-OPTIONS])
666 # -------------------------------------
667 # Start a testing chunk which compiles `calc' grammar with
668 # the GLR C++ skeleton, and performs several tests over the parser.
669 m4_define([AT_CHECK_CALC_GLR_CC],
670 [AT_CHECK_CALC([%language "C++" %glr-parser %defines %locations] $@)])
672 AT_CHECK_CALC_GLR_CC([])
673 AT_CHECK_CALC_GLR_CC([%error-verbose %name-prefix "calc" %verbose %yacc])
675 AT_CHECK_CALC_GLR_CC([%debug])
676 AT_CHECK_CALC_GLR_CC([%error-verbose %debug %name-prefix "calc" %verbose %yacc])
678 AT_CHECK_CALC_GLR_CC([%pure-parser %error-verbose %debug %name-prefix "calc" %verbose %yacc])
680 AT_CHECK_CALC_GLR_CC([%pure-parser %error-verbose %debug %name-prefix "calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])