1 # Simple calculator. -*- Autotest -*-
3 # Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
4 # 2009, 2010 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;
126 /* Skip current token, then white spaces. */
130 [ AT_LOC_FIRST_COLUMN = AT_LOC_LAST_COLUMN;
131 AT_LOC_FIRST_LINE = AT_LOC_LAST_LINE;
134 while ((c = get_char (]AT_LEX_ARGS[)) == ' ' || c == '\t');
136 /* process numbers */
137 if (c == '.' || isdigit (c))
139 unget_char (]AT_LEX_PRE_ARGS[ c);
140 ]AT_VAL[.ival = read_signed_integer (]AT_LEX_ARGS[);
144 /* Return end-of-file. */
148 /* Return single chars. */
153 AT_DATA_GRAMMAR([calc.y],
154 [[/* Infix notation calculator--calc */
157 [%define global_tokens_and_yystype])[
160 ]AT_LOCATION_TYPE_IF([[
174 # define YYLLOC_DEFAULT(Current, Rhs, N) \
178 (Current).first = YYRHSLOC (Rhs, 1).first; \
179 (Current).last = YYRHSLOC (Rhs, N).last; \
183 (Current).first = (Current).last = YYRHSLOC (Rhs, 0).last; \
188 /* Exercise pre-prologue dependency to %union. */
189 typedef int semantic_value;
192 /* Exercise %union. */
202 extern FILE *input;]AT_SKEL_CC_IF([[
204 # define YYLTYPE ]AT_NAME_PREFIX[::parser::location_type
217 # define alarm(seconds) /* empty */
222 static semantic_value global_result = 0;
223 static int global_count = 0;
224 static int power (int base, int exponent);
227 [/* yyerror receives the location if:
228 - %location & %pure & %glr
229 - %location & %pure & %yacc & %parse-param. */
230 static void yyerror (AT_YYERROR_ARG_LOC_IF([YYLTYPE *llocp, ])
231 AT_PARAM_IF([semantic_value *result, int *count, ])
234 int yylex (]AT_LEX_FORMALS[);
237 ]AT_SKEL_CC_IF([AT_LOCATION_TYPE_IF([], [
238 /* The lalr1.cc skeleton, for backward compatibility, defines
239 a constructor for position that initializes the filename. The
240 glr.cc skeleton does not (and in fact cannot: location/position
241 are stored in a union, from which objects with constructors are
248 /* Bison Declarations */
249 %token CALC_EOF 0 "end of input"
250 %token <ival> NUM "number"
253 %nonassoc '=' /* comparison */
256 %left NEG /* negation--unary minus */
257 %right '^' /* exponentiation */
259 /* Grammar follows */
263 | input line { ]AT_PARAM_IF([++*count; ++global_count;])[ }
268 | exp '\n' { ]AT_PARAM_IF([*result = global_result = $1], [USE ($1)])[; }
276 fprintf (stderr, "calc: error: %d != %d\n", $1, $3);
279 | exp '+' exp { $$ = $1 + $3; }
280 | exp '-' exp { $$ = $1 - $3; }
281 | exp '*' exp { $$ = $1 * $3; }
282 | exp '/' exp { $$ = $1 / $3; }
283 | '-' exp %prec NEG { $$ = -$2; }
284 | exp '^' exp { $$ = power ($1, $3); }
285 | '(' exp ')' { $$ = $2; }
286 | '(' error ')' { $$ = 1111; yyerrok; }
287 | '!' { $$ = 0; YYERROR; }
288 | '-' error { $$ = 0; YYERROR; }
293 [AT_LOCATION_TYPE_IF([[
295 operator<< (std::ostream& o, const Span& s)
297 o << s.first.l << '.' << s.first.c;
298 if (s.first.l != s.last.l)
299 o << '-' << s.last.l << '.' << s.last.c - 1;
300 else if (s.first.c != s.last.c - 1)
301 o << '-' << s.last.c - 1;
306 /* A C++ error reporting function. */
308 AT_NAME_PREFIX::parser::error (const location_type& l, const std::string& m)
311 std::cerr << AT_LOCATION_IF([l << ": " << ])m << std::endl;
314 /* A C++ yyparse that simulates the C signature. */
316 yyparse (AT_PARAM_IF([semantic_value *result, int *count]))
318 AT_NAME_PREFIX::parser parser[]AT_PARAM_IF([ (result, count)]);
320 parser.set_debug_level (1);
322 return parser.parse ();
325 [/* A C error reporting function. */
327 yyerror (AT_YYERROR_ARG_LOC_IF([YYLTYPE *llocp, ])
328 AT_PARAM_IF([semantic_value *result, int *count, ])
331 AT_PARAM_IF([(void) result; (void) count;])
332 AT_YYERROR_SEES_LOC_IF([
333 fprintf (stderr, "%d.%d",
334 AT_LOC_FIRST_LINE, AT_LOC_FIRST_COLUMN);
335 if (AT_LOC_FIRST_LINE != AT_LOC_LAST_LINE)
336 fprintf (stderr, "-%d.%d",
337 AT_LOC_LAST_LINE, AT_LOC_LAST_COLUMN - 1);
338 else if (AT_LOC_FIRST_COLUMN != AT_LOC_LAST_COLUMN - 1)
339 fprintf (stderr, "-%d",
340 AT_LOC_LAST_COLUMN - 1);
341 fprintf (stderr, ": ");])
342 fprintf (stderr, "%s\n", s);
345 ]AT_DEFINES_IF(, [AT_CALC_LEX])[
348 power (int base, int exponent)
353 for (/* Niente */; exponent; --exponent)
359 /* A C main function. */
361 main (int argc, const char **argv)
363 semantic_value result = 0;
367 /* This used to be alarm (10), but that isn't enough time for
368 a July 1995 vintage DEC Alphastation 200 4/100 system,
369 according to Nelson H. F. Beebe. 100 seconds is enough. */
373 input = fopen (argv[1], "r");
383 ]AT_SKEL_CC_IF([], [m4_bmatch([$4], [%debug],
385 status = yyparse (]AT_PARAM_IF([[&result, &count]])[);
388 if (global_result != result)
390 if (global_count != count)
395 AT_DEFINES_IF([AT_DATA_SOURCE([[calc-lex.c]AT_SKEL_CC_IF([[c]])],
396 [[#include "calc.h]AT_SKEL_CC_IF([[h]])["
399 m4_popdef([AT_CALC_LEX])
403 # AT_DATA_CALC_Y([BISON-OPTIONS])
404 # -------------------------------
405 # Produce `calc.y' and, if %defines was specified, `calc-lex.c' or
407 m4_define([AT_DATA_CALC_Y],
408 [_AT_DATA_CALC_Y($[1], $[2], $[3], [$1])
413 # _AT_CHECK_CALC(BISON-OPTIONS, INPUT, [NUM-STDERR-LINES])
414 # --------------------------------------------------------
415 # Run `calc' on INPUT and expect no STDOUT nor STDERR.
417 # If BISON-OPTIONS contains `%debug' but not `%glr-parser', then
419 # NUM-STDERR-LINES is the number of expected lines on stderr.
420 # Currently this is ignored, though, since the output format is fluctuating.
422 # We don't count GLR's traces yet, since its traces are somewhat
423 # different from LALR's.
424 m4_define([_AT_CHECK_CALC],
428 AT_PARSER_CHECK([./calc input], 0, [], [stderr])
432 # _AT_CHECK_CALC_ERROR(BISON-OPTIONS, EXIT-STATUS, INPUT,
433 # [NUM-STDERR-LINES],
434 # [VERBOSE-AND-LOCATED-ERROR-MESSAGE])
435 # ---------------------------------------------------------
436 # Run `calc' on INPUT, and expect a `syntax error' message.
438 # If INPUT starts with a slash, it is used as absolute input file name,
439 # otherwise as contents.
441 # NUM-STDERR-LINES is the number of expected lines on stderr.
442 # Currently this is ignored, though, since the output format is fluctuating.
444 # If BISON-OPTIONS contains `%location', then make sure the ERROR-LOCATION
445 # is correctly output on stderr.
447 # If BISON-OPTIONS contains `%error-verbose', then make sure the
448 # IF-YYERROR-VERBOSE message is properly output after `syntax error, '
451 # If BISON-OPTIONS contains `%debug' but not `%glr', then NUM-STDERR-LINES
452 # is the number of expected lines on stderr.
453 m4_define([_AT_CHECK_CALC_ERROR],
454 [m4_bmatch([$3], [^/],
455 [AT_PARSER_CHECK([./calc $3], $2, [], [stderr])],
459 AT_PARSER_CHECK([./calc input], $2, [], [stderr])])
461 # Normalize the observed and expected error messages, depending upon the
463 # 1. Remove the traces from observed.
478 /^yydestructor:/d' stderr >at-stderr
480 # 2. Create the reference error message.
484 # 3. If locations are not used, remove them.
485 AT_YYERROR_SEES_LOC_IF([],
486 [[sed 's/^[-0-9.]*: //' expout >at-expout
487 mv at-expout expout]])
488 # 4. If error-verbose is not used, strip the`, unexpected....' part.
489 m4_bmatch([$1], [%error-verbose], [],
490 [[sed 's/syntax error, .*$/syntax error/' expout >at-expout
491 mv at-expout expout]])
493 AT_CHECK([cat stderr], 0, [expout])
497 # AT_CHECK_CALC([BISON-OPTIONS, [EXPECTED-TO-FAIL]])
498 # --------------------------------------------------
499 # Start a testing chunk which compiles `calc' grammar with
500 # BISON-OPTIONS, and performs several tests over the parser.
501 # However, if EXPECTED-TO-FAIL is nonempty, this test is expected to fail.
502 m4_define([AT_CHECK_CALC],
503 [# We use integers to avoid dependencies upon the precision of doubles.
504 AT_SETUP([Calculator $1])
506 m4_ifval([$2], [AT_CHECK([exit 77])])
508 AT_BISON_OPTION_PUSHDEFS([$1])
511 AT_FULL_COMPILE([calc], [AT_DEFINES_IF([[lex]])])
513 # Test the priorities.
530 # Some syntax errors.
531 _AT_CHECK_CALC_ERROR([$1], [1], [0 0], [15],
532 [1.3: syntax error, unexpected number])
533 _AT_CHECK_CALC_ERROR([$1], [1], [1//2], [20],
534 [1.3: syntax error, unexpected '/', expecting number or '-' or '(' or '!'])
535 _AT_CHECK_CALC_ERROR([$1], [1], [error], [5],
536 [1.1: syntax error, unexpected $undefined])
537 _AT_CHECK_CALC_ERROR([$1], [1], [1 = 2 = 3], [30],
538 [1.7: syntax error, unexpected '='])
539 _AT_CHECK_CALC_ERROR([$1], [1],
543 [2.1: syntax error, unexpected '+'])
544 # Exercise error messages with EOF: work on an empty file.
545 _AT_CHECK_CALC_ERROR([$1], [1], [/dev/null], [4],
546 [1.1: syntax error, unexpected end of input])
548 # Exercise the error token: without it, we die at the first error,
551 # - have several errors which exercise different shift/discardings
552 # - (): nothing to pop, nothing to discard
553 # - (1 + 1 + 1 +): a lot to pop, nothing to discard
554 # - (* * *): nothing to pop, a lot to discard
555 # - (1 + 2 * *): some to pop and discard
557 # - test the action associated to `error'
559 # - check the lookahead that triggers an error is not discarded
560 # when we enter error recovery. Below, the lookahead causing the
561 # first error is ")", which is needed to recover from the error and
562 # produce the "0" that triggers the "0 != 1" error.
564 _AT_CHECK_CALC_ERROR([$1], [0],
565 [() + (1 + 1 + 1 +) + (* * *) + (1 * 2 * *) = 1],
567 [1.2: syntax error, unexpected ')', expecting number or '-' or '(' or '!'
568 1.18: syntax error, unexpected ')', expecting number or '-' or '(' or '!'
569 1.23: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
570 1.41: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
571 calc: error: 4444 != 1])
573 # The same, but this time exercising explicitly triggered syntax errors.
574 # POSIX says the lookahead causing the error should not be discarded.
575 _AT_CHECK_CALC_ERROR([$1], [0], [(!) + (0 0) = 1], [102],
576 [1.10: syntax error, unexpected number
577 calc: error: 2222 != 1])
578 _AT_CHECK_CALC_ERROR([$1], [0], [(- *) + (0 0) = 1], [113],
579 [1.4: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
580 1.12: syntax error, unexpected number
581 calc: error: 2222 != 1])
583 # Check that yyerrok works properly: second error is not reported,
584 # third and fourth are. Parse status is succesfull.
585 _AT_CHECK_CALC_ERROR([$1], [0], [(* *) + (*) + (*)], [113],
586 [1.2: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
587 1.10: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
588 1.16: syntax error, unexpected '*', expecting number or '-' or '(' or '!'])
590 AT_BISON_OPTION_POPDEFS
598 # ------------------------ #
599 # Simple LALR Calculator. #
600 # ------------------------ #
602 AT_BANNER([[Simple LALR(1) Calculator.]])
604 # AT_CHECK_CALC_LALR([BISON-OPTIONS])
605 # -----------------------------------
606 # Start a testing chunk which compiles `calc' grammar with
607 # BISON-OPTIONS, and performs several tests over the parser.
608 m4_define([AT_CHECK_CALC_LALR],
613 AT_CHECK_CALC_LALR([%defines])
614 AT_CHECK_CALC_LALR([%locations])
616 AT_CHECK_CALC_LALR([%name-prefix="calc"]) dnl test deprecated `='
617 AT_CHECK_CALC_LALR([%verbose])
618 AT_CHECK_CALC_LALR([%yacc])
619 AT_CHECK_CALC_LALR([%error-verbose])
621 AT_CHECK_CALC_LALR([%define api.pure %locations])
622 AT_CHECK_CALC_LALR([%define api.push-pull both %define api.pure %locations])
623 AT_CHECK_CALC_LALR([%error-verbose %locations])
625 AT_CHECK_CALC_LALR([%error-verbose %locations %defines %name-prefix "calc" %verbose %yacc])
627 AT_CHECK_CALC_LALR([%debug])
628 AT_CHECK_CALC_LALR([%error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
630 AT_CHECK_CALC_LALR([%define api.pure %error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
631 AT_CHECK_CALC_LALR([%define api.push-pull both %define api.pure %error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
633 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}])
636 # ----------------------- #
637 # Simple GLR Calculator. #
638 # ----------------------- #
640 AT_BANNER([[Simple GLR Calculator.]])
642 # AT_CHECK_CALC_GLR([BISON-OPTIONS])
643 # ----------------------------------
644 # Start a testing chunk which compiles `calc' grammar with
645 # BISON-OPTIONS and %glr-parser, and performs several tests over the parser.
646 m4_define([AT_CHECK_CALC_GLR],
647 [AT_CHECK_CALC([%glr-parser] $@)])
652 AT_CHECK_CALC_GLR([%defines])
653 AT_CHECK_CALC_GLR([%locations])
654 AT_CHECK_CALC_GLR([%name-prefix "calc"])
655 AT_CHECK_CALC_GLR([%verbose])
656 AT_CHECK_CALC_GLR([%yacc])
657 AT_CHECK_CALC_GLR([%error-verbose])
659 AT_CHECK_CALC_GLR([%define api.pure %locations])
660 AT_CHECK_CALC_GLR([%error-verbose %locations])
662 AT_CHECK_CALC_GLR([%error-verbose %locations %defines %name-prefix "calc" %verbose %yacc])
664 AT_CHECK_CALC_GLR([%debug])
665 AT_CHECK_CALC_GLR([%error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
667 AT_CHECK_CALC_GLR([%define api.pure %error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
669 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}])
672 # ----------------------------- #
673 # Simple LALR1 C++ Calculator. #
674 # ----------------------------- #
676 AT_BANNER([[Simple LALR(1) C++ Calculator.]])
678 # First let's try using %skeleton
679 AT_CHECK_CALC([%skeleton "lalr1.cc" %defines %locations])
681 # AT_CHECK_CALC_LALR1_CC([BISON-OPTIONS])
682 # ---------------------------------------
683 # Start a testing chunk which compiles `calc' grammar with
684 # the C++ skeleton, and performs several tests over the parser.
685 m4_define([AT_CHECK_CALC_LALR1_CC],
686 [AT_CHECK_CALC([%language "C++" %defines %locations] $@)])
688 AT_CHECK_CALC_LALR1_CC([])
689 AT_CHECK_CALC_LALR1_CC([%define location_type Span])
690 AT_CHECK_CALC_LALR1_CC([%error-verbose %name-prefix "calc" %verbose %yacc])
691 AT_CHECK_CALC_LALR1_CC([%error-verbose %debug %name-prefix "calc" %verbose %yacc])
693 AT_CHECK_CALC_LALR1_CC([%pure-parser %error-verbose %debug %name-prefix "calc" %verbose %yacc])
695 AT_CHECK_CALC_LALR1_CC([%pure-parser %error-verbose %debug %name-prefix "calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])
699 # --------------------------- #
700 # Simple GLR C++ Calculator. #
701 # --------------------------- #
703 AT_BANNER([[Simple GLR C++ Calculator.]])
705 # Again, we try also using %skeleton.
706 AT_CHECK_CALC([%skeleton "glr.cc" %defines %locations])
708 # AT_CHECK_CALC_GLR_CC([BISON-OPTIONS])
709 # -------------------------------------
710 # Start a testing chunk which compiles `calc' grammar with
711 # the GLR C++ skeleton, and performs several tests over the parser.
712 m4_define([AT_CHECK_CALC_GLR_CC],
713 [AT_CHECK_CALC([%language "C++" %glr-parser %defines %locations] $@)])
715 AT_CHECK_CALC_GLR_CC([])
716 AT_CHECK_CALC_GLR_CC([%define location_type Span])
717 AT_CHECK_CALC_GLR_CC([%error-verbose %name-prefix "calc" %verbose %yacc])
719 AT_CHECK_CALC_GLR_CC([%debug])
720 AT_CHECK_CALC_GLR_CC([%error-verbose %debug %name-prefix "calc" %verbose %yacc])
722 AT_CHECK_CALC_GLR_CC([%pure-parser %error-verbose %debug %name-prefix "calc" %verbose %yacc])
724 AT_CHECK_CALC_GLR_CC([%pure-parser %error-verbose %debug %name-prefix "calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])