1 # Simple calculator. -*- Autotest -*-
3 # Copyright (C) 2000-2010 Free Software Foundation, Inc.
5 # This program is free software: you can redistribute it and/or modify
6 # it under the terms of the GNU General Public License as published by
7 # the Free Software Foundation, either version 3 of the License, or
8 # (at your option) any later version.
10 # This program is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
15 # You should have received a copy of the GNU General Public License
16 # along with this program. If not, see <http://www.gnu.org/licenses/>.
18 ## ---------------------------------------------------- ##
19 ## Compile the grammar described in the documentation. ##
20 ## ---------------------------------------------------- ##
23 # ------------------------- #
24 # Helping Autotest macros. #
25 # ------------------------- #
28 # _AT_DATA_CALC_Y($1, $2, $3, [BISON-DIRECTIVES])
29 # -----------------------------------------------
30 # Produce `calc.y' and, if %defines was specified, `calc-lex.c' or
33 # Don't call this macro directly, because it contains some occurrences
34 # of `$1' etc. which will be interpreted by m4. So you should call it
35 # with $1, $2, and $3 as arguments, which is what AT_DATA_CALC_Y does.
36 m4_define([_AT_DATA_CALC_Y],
37 [m4_if([$1$2$3], $[1]$[2]$[3], [],
38 [m4_fatal([$0: Invalid arguments: $@])])dnl
39 m4_pushdef([AT_CALC_LEX],
42 int ]AT_NAME_PREFIX[lex (]AT_LEX_FORMALS[);
43 static int get_char (]AT_LEX_FORMALS[);
44 static void unget_char (]AT_LEX_PRE_FORMALS[ int c);
47 static YYLTYPE last_yylloc;
50 get_char (]AT_LEX_FORMALS[)
52 int res = getc (input);
59 AT_LOC.last_column = 1;
68 unget_char (]AT_LEX_PRE_FORMALS[ int c)
72 /* Wrong when C == `\n'. */
79 read_signed_integer (]AT_LEX_FORMALS[)
81 int c = get_char (]AT_LEX_ARGS[);
88 c = get_char (]AT_LEX_ARGS[);
94 n = 10 * n + (c - '0');
95 c = get_char (]AT_LEX_ARGS[);
98 unget_char (]AT_LEX_PRE_ARGS[ c);
104 /*---------------------------------------------------------------.
105 | Lexical analyzer returns an integer on the stack and the token |
106 | NUM, or the ASCII character read if not a number. Skips all |
107 | blanks and tabs, returns 0 for EOF. |
108 `---------------------------------------------------------------*/
111 ]AT_NAME_PREFIX[lex (]AT_LEX_FORMALS[)
120 AT_LOC.last_column = 1;
121 AT_LOC.last_line = 1;
126 AT_LOC.first_column = AT_LOC.last_column;
127 AT_LOC.first_line = AT_LOC.last_line;
130 /* Skip white space. */
131 while ((c = get_char (]AT_LEX_ARGS[)) == ' ' || c == '\t')
134 [ AT_LOC.first_column = AT_LOC.last_column;
135 AT_LOC.first_line = AT_LOC.last_line;
139 /* process numbers */
140 if (c == '.' || isdigit (c))
142 unget_char (]AT_LEX_PRE_ARGS[ c);
143 ]AT_VAL[.ival = read_signed_integer (]AT_LEX_ARGS[);
147 /* Return end-of-file. */
151 /* Return single chars. */
156 AT_DATA_GRAMMAR([calc.y],
157 [[/* Infix notation calculator--calc */
160 [%define global_tokens_and_yystype])[
163 /* Exercise pre-prologue dependency to %union. */
164 typedef int semantic_value;
167 /* Exercise %union. */
177 extern FILE *input;]AT_SKEL_CC_IF([[
179 # define YYLTYPE ]AT_NAME_PREFIX[::parser::location_type
181 #define first_line begin.line
182 #define first_column begin.column
183 #define last_line end.line
184 #define last_column end.column]])[
195 # define alarm(seconds) /* empty */
200 static semantic_value global_result = 0;
201 static int global_count = 0;
202 static int power (int base, int exponent);
204 [/* yyerror receives the location if:
205 - %location & %pure & %glr
206 - %location & %pure & %yacc & %parse-param. */
207 static void yyerror (AT_YYERROR_ARG_LOC_IF([YYLTYPE *llocp, ])
208 AT_PARAM_IF([semantic_value *result, int *count, ])
211 int yylex (]AT_LEX_FORMALS[);
215 [/* The lalr1.cc skeleton, for backward compatibility, defines
216 a constructor for position that initializes the filename. The
217 glr.cc skeleton does not (and in fact cannot: location/position
218 are stored in a union, from which objects with constructors are
225 /* Bison Declarations */
226 %token CALC_EOF 0 "end of input"
227 %token <ival> NUM "number"
230 %nonassoc '=' /* comparison */
233 %left NEG /* negation--unary minus */
234 %right '^' /* exponentiation */
236 /* Grammar follows */
240 | input line { ]AT_PARAM_IF([++*count; ++global_count;])[ }
245 | exp '\n' { ]AT_PARAM_IF([*result = global_result = $1], [USE ($1)])[; }
253 fprintf (stderr, "calc: error: %d != %d\n", $1, $3);
256 | exp '+' exp { $$ = $1 + $3; }
257 | exp '-' exp { $$ = $1 - $3; }
258 | exp '*' exp { $$ = $1 * $3; }
259 | exp '/' exp { $$ = $1 / $3; }
260 | '-' exp %prec NEG { $$ = -$2; }
261 | exp '^' exp { $$ = power ($1, $3); }
262 | '(' exp ')' { $$ = $2; }
263 | '(' error ')' { $$ = 1111; yyerrok; }
264 | '!' { $$ = 0; YYERROR; }
265 | '-' error { $$ = 0; YYERROR; }
270 [/* A C++ error reporting function. */
272 AT_NAME_PREFIX::parser::error (const location_type& l, const std::string& m)
275 std::cerr << AT_LOCATION_IF([l << ": " << ])m << std::endl;
278 /* A C++ yyparse that simulates the C signature. */
280 yyparse (AT_PARAM_IF([semantic_value *result, int *count]))
282 AT_NAME_PREFIX::parser parser[]AT_PARAM_IF([ (result, count)]);
284 parser.set_debug_level (1);
286 return parser.parse ();
289 [/* A C error reporting function. */
291 yyerror (AT_YYERROR_ARG_LOC_IF([YYLTYPE *llocp, ])
292 AT_PARAM_IF([semantic_value *result, int *count, ])
295 AT_PARAM_IF([(void) result; (void) count;])
296 AT_YYERROR_SEES_LOC_IF([
297 fprintf (stderr, "%d.%d",
298 AT_LOC.first_line, AT_LOC.first_column);
299 if (AT_LOC.first_line != AT_LOC.last_line)
300 fprintf (stderr, "-%d.%d",
301 AT_LOC.last_line, AT_LOC.last_column - 1);
302 else if (AT_LOC.first_column != AT_LOC.last_column - 1)
303 fprintf (stderr, "-%d",
304 AT_LOC.last_column - 1);
305 fprintf (stderr, ": ");])
306 fprintf (stderr, "%s\n", s);
309 ]AT_DEFINES_IF(, [AT_CALC_LEX])[
312 power (int base, int exponent)
317 for (/* Niente */; exponent; --exponent)
323 /* A C main function. */
325 main (int argc, const char **argv)
327 semantic_value result = 0;
331 /* This used to be alarm (10), but that isn't enough time for
332 a July 1995 vintage DEC Alphastation 200 4/100 system,
333 according to Nelson H. F. Beebe. 100 seconds is enough. */
337 input = fopen (argv[1], "r");
347 ]AT_SKEL_CC_IF([], [m4_bmatch([$4], [%debug],
349 status = yyparse (]AT_PARAM_IF([[&result, &count]])[);
352 if (global_result != result)
354 if (global_count != count)
359 AT_DEFINES_IF([AT_DATA_SOURCE([[calc-lex.c]AT_SKEL_CC_IF([[c]])],
360 [[#include "calc.h]AT_SKEL_CC_IF([[h]])["
363 m4_popdef([AT_CALC_LEX])
367 # AT_DATA_CALC_Y([BISON-OPTIONS])
368 # -------------------------------
369 # Produce `calc.y' and, if %defines was specified, `calc-lex.c' or
371 m4_define([AT_DATA_CALC_Y],
372 [_AT_DATA_CALC_Y($[1], $[2], $[3], [$1])
377 # _AT_CHECK_CALC(BISON-OPTIONS, INPUT, [NUM-STDERR-LINES])
378 # --------------------------------------------------------
379 # Run `calc' on INPUT and expect no STDOUT nor STDERR.
381 # If BISON-OPTIONS contains `%debug' but not `%glr-parser', then
383 # NUM-STDERR-LINES is the number of expected lines on stderr.
384 # Currently this is ignored, though, since the output format is fluctuating.
386 # We don't count GLR's traces yet, since its traces are somewhat
387 # different from LALR's.
388 m4_define([_AT_CHECK_CALC],
392 AT_PARSER_CHECK([./calc input], 0, [], [stderr])
396 # _AT_CHECK_CALC_ERROR(BISON-OPTIONS, EXIT-STATUS, INPUT,
397 # [NUM-STDERR-LINES],
398 # [VERBOSE-AND-LOCATED-ERROR-MESSAGE])
399 # ---------------------------------------------------------
400 # Run `calc' on INPUT, and expect a `syntax error' message.
402 # If INPUT starts with a slash, it is used as absolute input file name,
403 # otherwise as contents.
405 # NUM-STDERR-LINES is the number of expected lines on stderr.
406 # Currently this is ignored, though, since the output format is fluctuating.
408 # If BISON-OPTIONS contains `%location', then make sure the ERROR-LOCATION
409 # is correctly output on stderr.
411 # If BISON-OPTIONS contains `%error-verbose', then make sure the
412 # IF-YYERROR-VERBOSE message is properly output after `syntax error, '
415 # If BISON-OPTIONS contains `%debug' but not `%glr', then NUM-STDERR-LINES
416 # is the number of expected lines on stderr.
417 m4_define([_AT_CHECK_CALC_ERROR],
418 [m4_bmatch([$3], [^/],
419 [AT_PARSER_CHECK([./calc $3], $2, [], [stderr])],
423 AT_PARSER_CHECK([./calc input], $2, [], [stderr])])
425 # Normalize the observed and expected error messages, depending upon the
427 # 1. Remove the traces from observed.
442 /^yydestructor:/d' stderr >at-stderr
444 # 2. Create the reference error message.
448 # 3. If locations are not used, remove them.
449 AT_YYERROR_SEES_LOC_IF([],
450 [[sed 's/^[-0-9.]*: //' expout >at-expout
451 mv at-expout expout]])
452 # 4. If error-verbose is not used, strip the`, unexpected....' part.
453 m4_bmatch([$1], [%error-verbose], [],
454 [[sed 's/syntax error, .*$/syntax error/' expout >at-expout
455 mv at-expout expout]])
457 AT_CHECK([cat stderr], 0, [expout])
461 # AT_CHECK_CALC([BISON-OPTIONS, [EXPECTED-TO-FAIL]])
462 # --------------------------------------------------
463 # Start a testing chunk which compiles `calc' grammar with
464 # BISON-OPTIONS, and performs several tests over the parser.
465 # However, if EXPECTED-TO-FAIL is nonempty, this test is expected to fail.
466 m4_define([AT_CHECK_CALC],
467 [# We use integers to avoid dependencies upon the precision of doubles.
468 AT_SETUP([Calculator $1])
470 m4_ifval([$2], [AT_CHECK([exit 77])])
472 AT_BISON_OPTION_PUSHDEFS([$1])
475 AT_FULL_COMPILE([calc], [AT_DEFINES_IF([[lex]])])
477 # Test the priorities.
494 # Some syntax errors.
495 _AT_CHECK_CALC_ERROR([$1], [1], [0 0], [15],
496 [1.3: syntax error, unexpected number])
497 _AT_CHECK_CALC_ERROR([$1], [1], [1//2], [20],
498 [1.3: syntax error, unexpected '/', expecting number or '-' or '(' or '!'])
499 _AT_CHECK_CALC_ERROR([$1], [1], [error], [5],
500 [1.1: syntax error, unexpected $undefined])
501 _AT_CHECK_CALC_ERROR([$1], [1], [1 = 2 = 3], [30],
502 [1.7: syntax error, unexpected '='])
503 _AT_CHECK_CALC_ERROR([$1], [1],
507 [2.1: syntax error, unexpected '+'])
508 # Exercise error messages with EOF: work on an empty file.
509 _AT_CHECK_CALC_ERROR([$1], [1], [/dev/null], [4],
510 [1.1: syntax error, unexpected end of input])
512 # Exercise the error token: without it, we die at the first error,
515 # - have several errors which exercise different shift/discardings
516 # - (): nothing to pop, nothing to discard
517 # - (1 + 1 + 1 +): a lot to pop, nothing to discard
518 # - (* * *): nothing to pop, a lot to discard
519 # - (1 + 2 * *): some to pop and discard
521 # - test the action associated to `error'
523 # - check the lookahead that triggers an error is not discarded
524 # when we enter error recovery. Below, the lookahead causing the
525 # first error is ")", which is needed to recover from the error and
526 # produce the "0" that triggers the "0 != 1" error.
528 _AT_CHECK_CALC_ERROR([$1], [0],
529 [() + (1 + 1 + 1 +) + (* * *) + (1 * 2 * *) = 1],
531 [1.2: syntax error, unexpected ')', expecting number or '-' or '(' or '!'
532 1.18: syntax error, unexpected ')', expecting number or '-' or '(' or '!'
533 1.23: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
534 1.41: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
535 calc: error: 4444 != 1])
537 # The same, but this time exercising explicitly triggered syntax errors.
538 # POSIX says the lookahead causing the error should not be discarded.
539 _AT_CHECK_CALC_ERROR([$1], [0], [(!) + (0 0) = 1], [102],
540 [1.10: syntax error, unexpected number
541 calc: error: 2222 != 1])
542 _AT_CHECK_CALC_ERROR([$1], [0], [(- *) + (0 0) = 1], [113],
543 [1.4: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
544 1.12: syntax error, unexpected number
545 calc: error: 2222 != 1])
547 # Check that yyerrok works properly: second error is not reported,
548 # third and fourth are. Parse status is succesfull.
549 _AT_CHECK_CALC_ERROR([$1], [0], [(* *) + (*) + (*)], [113],
550 [1.2: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
551 1.10: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
552 1.16: syntax error, unexpected '*', expecting number or '-' or '(' or '!'])
554 AT_BISON_OPTION_POPDEFS
562 # ------------------------ #
563 # Simple LALR Calculator. #
564 # ------------------------ #
566 AT_BANNER([[Simple LALR(1) Calculator.]])
568 # AT_CHECK_CALC_LALR([BISON-OPTIONS])
569 # -----------------------------------
570 # Start a testing chunk which compiles `calc' grammar with
571 # BISON-OPTIONS, and performs several tests over the parser.
572 m4_define([AT_CHECK_CALC_LALR],
577 AT_CHECK_CALC_LALR([%defines])
578 AT_CHECK_CALC_LALR([%locations])
579 AT_CHECK_CALC_LALR([%name-prefix="calc"]) dnl test deprecated `='
580 AT_CHECK_CALC_LALR([%verbose])
581 AT_CHECK_CALC_LALR([%yacc])
582 AT_CHECK_CALC_LALR([%error-verbose])
584 AT_CHECK_CALC_LALR([%define api.pure %locations])
585 AT_CHECK_CALC_LALR([%define api.push-pull both %define api.pure %locations])
586 AT_CHECK_CALC_LALR([%error-verbose %locations])
588 AT_CHECK_CALC_LALR([%error-verbose %locations %defines %name-prefix "calc" %verbose %yacc])
590 AT_CHECK_CALC_LALR([%debug])
591 AT_CHECK_CALC_LALR([%error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
593 AT_CHECK_CALC_LALR([%define api.pure %error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
594 AT_CHECK_CALC_LALR([%define api.push-pull both %define api.pure %error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
596 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}])
599 # ----------------------- #
600 # Simple GLR Calculator. #
601 # ----------------------- #
603 AT_BANNER([[Simple GLR Calculator.]])
605 # AT_CHECK_CALC_GLR([BISON-OPTIONS])
606 # ----------------------------------
607 # Start a testing chunk which compiles `calc' grammar with
608 # BISON-OPTIONS and %glr-parser, and performs several tests over the parser.
609 m4_define([AT_CHECK_CALC_GLR],
610 [AT_CHECK_CALC([%glr-parser] $@)])
615 AT_CHECK_CALC_GLR([%defines])
616 AT_CHECK_CALC_GLR([%locations])
617 AT_CHECK_CALC_GLR([%name-prefix "calc"])
618 AT_CHECK_CALC_GLR([%verbose])
619 AT_CHECK_CALC_GLR([%yacc])
620 AT_CHECK_CALC_GLR([%error-verbose])
622 AT_CHECK_CALC_GLR([%define api.pure %locations])
623 AT_CHECK_CALC_GLR([%error-verbose %locations])
625 AT_CHECK_CALC_GLR([%error-verbose %locations %defines %name-prefix "calc" %verbose %yacc])
627 AT_CHECK_CALC_GLR([%debug])
628 AT_CHECK_CALC_GLR([%error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
630 AT_CHECK_CALC_GLR([%define api.pure %error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
632 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}])
635 # ----------------------------- #
636 # Simple LALR1 C++ Calculator. #
637 # ----------------------------- #
639 AT_BANNER([[Simple LALR(1) C++ Calculator.]])
641 # First let's try using %skeleton
642 AT_CHECK_CALC([%skeleton "lalr1.cc" %defines %locations])
644 # AT_CHECK_CALC_LALR1_CC([BISON-OPTIONS])
645 # ---------------------------------------
646 # Start a testing chunk which compiles `calc' grammar with
647 # the C++ skeleton, and performs several tests over the parser.
648 m4_define([AT_CHECK_CALC_LALR1_CC],
649 [AT_CHECK_CALC([%language "C++" %defines %locations] $@)])
651 AT_CHECK_CALC_LALR1_CC([])
652 AT_CHECK_CALC_LALR1_CC([%error-verbose %name-prefix "calc" %verbose %yacc])
654 AT_CHECK_CALC_LALR1_CC([%error-verbose %debug %name-prefix "calc" %verbose %yacc])
656 AT_CHECK_CALC_LALR1_CC([%pure-parser %error-verbose %debug %name-prefix "calc" %verbose %yacc])
658 AT_CHECK_CALC_LALR1_CC([%pure-parser %error-verbose %debug %name-prefix "calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])
662 # --------------------------- #
663 # Simple GLR C++ Calculator. #
664 # --------------------------- #
666 AT_BANNER([[Simple GLR C++ Calculator.]])
668 # Again, we try also using %skeleton.
669 AT_CHECK_CALC([%skeleton "glr.cc" %defines %locations])
671 # AT_CHECK_CALC_GLR_CC([BISON-OPTIONS])
672 # -------------------------------------
673 # Start a testing chunk which compiles `calc' grammar with
674 # the GLR C++ skeleton, and performs several tests over the parser.
675 m4_define([AT_CHECK_CALC_GLR_CC],
676 [AT_CHECK_CALC([%language "C++" %glr-parser %defines %locations] $@)])
678 AT_CHECK_CALC_GLR_CC([])
679 AT_CHECK_CALC_GLR_CC([%error-verbose %name-prefix "calc" %verbose %yacc])
681 AT_CHECK_CALC_GLR_CC([%debug])
682 AT_CHECK_CALC_GLR_CC([%error-verbose %debug %name-prefix "calc" %verbose %yacc])
684 AT_CHECK_CALC_GLR_CC([%pure-parser %error-verbose %debug %name-prefix "calc" %verbose %yacc])
686 AT_CHECK_CALC_GLR_CC([%pure-parser %error-verbose %debug %name-prefix "calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])