1 # Simple calculator. -*- Autotest -*-
3 # Copyright (C) 2000-2012 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.
37 # When %defines is not passed, generate a single self-contained file.
38 # Otherwise, generate three: calc.y with the parser, calc-lex.c with
39 # the scanner, and calc-main.c with "main()". This is in order to
40 # stress the use of the generated parser header. To avoid code
41 # duplication, AT_CALC_LEX and AT_CALC_MAIN contain the body of these
43 m4_define([_AT_DATA_CALC_Y],
44 [m4_if([$1$2$3], $[1]$[2]$[3], [],
45 [m4_fatal([$0: Invalid arguments: $@])])dnl
47 m4_pushdef([AT_CALC_MAIN],
48 [#include <stdlib.h> /* abort */
53 # define alarm(seconds) /* empty */
57 /* A C++ ]AT_NAME_PREFIX[parse that simulates the C signature. */
59 ]AT_NAME_PREFIX[parse (]AT_PARAM_IF([semantic_value *result, int *count]))[
61 ]AT_NAME_PREFIX[::parser parser]AT_PARAM_IF([ (result, count)])[;
63 parser.set_debug_level (1);
65 return parser.parse ();
69 semantic_value global_result = 0;
72 /* A C main function. */
74 main (int argc, const char **argv)
76 semantic_value result = 0;
80 /* This used to be alarm (10), but that isn't enough time for
81 a July 1995 vintage DEC Alphastation 200 4/100 system,
82 according to Nelson H. F. Beebe. 100 seconds is enough. */
86 input = fopen (argv[1], "r");
96 ]AT_SKEL_CC_IF([], [m4_bmatch([$4], [%debug],
97 [ ]AT_NAME_PREFIX[debug = 1;])])[
98 status = ]AT_NAME_PREFIX[parse (]AT_PARAM_IF([[&result, &count]])[);
101 if (global_result != result)
103 if (global_count != count)
110 m4_pushdef([AT_CALC_LEX],
113 ]AT_YYLEX_DECLARE_EXTERN[
114 static int get_char (]AT_YYLEX_FORMALS[);
115 static void unget_char (]AT_YYLEX_PRE_FORMALS[ int c);
118 static YYLTYPE last_yylloc;
121 get_char (]AT_YYLEX_FORMALS[)
123 int res = getc (input);
126 last_yylloc = AT_LOC;
130 AT_LOC_LAST_COLUMN = 1;
133 AT_LOC_LAST_COLUMN++;
139 unget_char (]AT_YYLEX_PRE_FORMALS[ int c)
143 /* Wrong when C == `\n'. */
144 AT_LOC = last_yylloc;
150 read_signed_integer (]AT_YYLEX_FORMALS[)
152 int c = get_char (]AT_YYLEX_ARGS[);
159 c = get_char (]AT_YYLEX_ARGS[);
165 n = 10 * n + (c - '0');
166 c = get_char (]AT_YYLEX_ARGS[);
169 unget_char (]AT_YYLEX_PRE_ARGS[ c);
175 /*---------------------------------------------------------------.
176 | Lexical analyzer returns an integer on the stack and the token |
177 | NUM, or the ASCII character read if not a number. Skips all |
178 | blanks and tabs, returns 0 for EOF. |
179 `---------------------------------------------------------------*/
190 AT_LOC_LAST_COLUMN = 1;
191 AT_LOC_LAST_LINE = 1;
195 /* Skip current token, then white spaces. */
199 [ AT_LOC_FIRST_COLUMN = AT_LOC_LAST_COLUMN;
200 AT_LOC_FIRST_LINE = AT_LOC_LAST_LINE;
203 while ((c = get_char (]AT_YYLEX_ARGS[)) == ' ' || c == '\t');
205 /* process numbers */
206 if (c == '.' || isdigit (c))
208 unget_char (]AT_YYLEX_PRE_ARGS[ c);
209 ]AT_VAL[.ival = read_signed_integer (]AT_YYLEX_ARGS[);
210 return ]AT_TOKEN_PREFIX[NUM;
213 /* Return end-of-file. */
215 return ]AT_TOKEN_PREFIX[CALC_EOF;
217 /* Return single chars. */
222 AT_DATA_GRAMMAR([calc.y],
223 [[/* Infix notation calculator--calc */
226 [%define global_tokens_and_yystype])[
229 ]AT_LOCATION_TYPE_IF([[
243 # define YYLLOC_DEFAULT(Current, Rhs, N) \
247 (Current).first = YYRHSLOC (Rhs, 1).first; \
248 (Current).last = YYRHSLOC (Rhs, N).last; \
252 (Current).first = (Current).last = YYRHSLOC (Rhs, 0).last; \
257 /* Exercise pre-prologue dependency to %union. */
258 typedef int semantic_value;
261 /* Exercise %union. */
272 extern semantic_value global_result;
273 extern int global_count;]AT_SKEL_CC_IF([[
275 # define YYLTYPE ]AT_NAME_PREFIX[::parser::location_type
287 static int power (int base, int exponent);
290 [static void yyerror (AT_YYERROR_ARG_LOC_IF([YYLTYPE *llocp, ])
291 AT_PARAM_IF([semantic_value *result, int *count, ])
294 ]AT_YYLEX_DECLARE_EXTERN[
297 ]AT_SKEL_CC_IF([AT_LOCATION_IF([AT_LOCATION_TYPE_IF([], [
298 /* The lalr1.cc skeleton, for backward compatibility, defines
299 a constructor for position that initializes the filename. The
300 glr.cc skeleton does not (and in fact cannot: location/position
301 are stored in a union, from which objects with constructors are
308 /* Bison Declarations */
309 %token CALC_EOF 0 "end of input"
310 %token <ival> NUM "number"
313 %nonassoc '=' /* comparison */
316 %precedence NEG /* negation--unary minus */
317 %right '^' /* exponentiation */
319 /* Grammar follows */
323 | input line { ]AT_PARAM_IF([++*count; ++global_count;])[ }
328 | exp '\n' { ]AT_PARAM_IF([*result = global_result = $1], [USE ($1)])[; }
336 fprintf (stderr, "calc: error: %d != %d\n", $1, $3);
339 | exp '+' exp { $$ = $1 + $3; }
340 | exp '-' exp { $$ = $1 - $3; }
341 | exp '*' exp { $$ = $1 * $3; }
342 | exp '/' exp { $$ = $1 / $3; }
343 | '-' exp %prec NEG { $$ = -$2; }
344 | exp '^' exp { $$ = power ($1, $3); }
345 | '(' exp ')' { $$ = $2; }
346 | '(' error ')' { $$ = 1111; yyerrok; }
347 | '!' { $$ = 0; YYERROR; }
348 | '-' error { $$ = 0; YYERROR; }
353 power (int base, int exponent)
356 assert (0 <= exponent);
357 for (/* Niente */; exponent; --exponent)
363 [AT_LOCATION_TYPE_IF([[
365 operator<< (std::ostream& o, const Span& s)
367 o << s.first.l << '.' << s.first.c;
368 if (s.first.l != s.last.l)
369 o << '-' << s.last.l << '.' << s.last.c - 1;
370 else if (s.first.c != s.last.c - 1)
371 o << '-' << s.last.c - 1;
376 [/* A C error reporting function. */
378 yyerror (AT_YYERROR_ARG_LOC_IF([YYLTYPE *llocp, ])
379 AT_PARAM_IF([semantic_value *result, int *count, ])
382 AT_PARAM_IF([(void) result; (void) count;])
383 AT_YYERROR_SEES_LOC_IF([
384 fprintf (stderr, "%d.%d",
385 AT_LOC_FIRST_LINE, AT_LOC_FIRST_COLUMN);
386 if (AT_LOC_FIRST_LINE != AT_LOC_LAST_LINE)
387 fprintf (stderr, "-%d.%d",
388 AT_LOC_LAST_LINE, AT_LOC_LAST_COLUMN - 1);
389 else if (AT_LOC_FIRST_COLUMN != AT_LOC_LAST_COLUMN - 1)
390 fprintf (stderr, "-%d",
391 AT_LOC_LAST_COLUMN - 1);
392 fprintf (stderr, ": ");])
393 fprintf (stderr, "%s\n", s);
401 AT_DEFINES_IF([AT_DATA_SOURCE([[calc-lex.c]AT_SKEL_CC_IF([[c]])],
402 [[#include "calc.h]AT_SKEL_CC_IF([[h]])["
405 AT_DATA_SOURCE([[calc-main.c]AT_SKEL_CC_IF([[c]])],
406 [[#include "calc.h]AT_SKEL_CC_IF([[h]])["
410 m4_popdef([AT_CALC_MAIN])
411 m4_popdef([AT_CALC_LEX])
415 # AT_DATA_CALC_Y([BISON-OPTIONS])
416 # -------------------------------
417 # Produce `calc.y' and, if %defines was specified, `calc-lex.c' or
419 m4_define([AT_DATA_CALC_Y],
420 [_AT_DATA_CALC_Y($[1], $[2], $[3], [$1])
425 # _AT_CHECK_CALC(BISON-OPTIONS, INPUT, [NUM-STDERR-LINES])
426 # --------------------------------------------------------
427 # Run `calc' on INPUT and expect no STDOUT nor STDERR.
429 # If BISON-OPTIONS contains `%debug' but not `%glr-parser', then
431 # NUM-STDERR-LINES is the number of expected lines on stderr.
432 # Currently this is ignored, though, since the output format is fluctuating.
434 # We don't count GLR's traces yet, since its traces are somewhat
435 # different from LALR's.
436 m4_define([_AT_CHECK_CALC],
440 AT_PARSER_CHECK([./calc input], 0, [], [stderr])
444 # _AT_CHECK_CALC_ERROR(BISON-OPTIONS, EXIT-STATUS, INPUT,
445 # [NUM-STDERR-LINES],
446 # [VERBOSE-AND-LOCATED-ERROR-MESSAGE])
447 # ---------------------------------------------------------
448 # Run `calc' on INPUT, and expect a `syntax error' message.
450 # If INPUT starts with a slash, it is used as absolute input file name,
451 # otherwise as contents.
453 # NUM-STDERR-LINES is the number of expected lines on stderr.
454 # Currently this is ignored, though, since the output format is fluctuating.
456 # If BISON-OPTIONS contains `%location', then make sure the ERROR-LOCATION
457 # is correctly output on stderr.
459 # If BISON-OPTIONS contains `%define parse.error verbose', then make sure the
460 # IF-YYERROR-VERBOSE message is properly output after `syntax error, '
463 # If BISON-OPTIONS contains `%debug' but not `%glr', then NUM-STDERR-LINES
464 # is the number of expected lines on stderr.
465 m4_define([_AT_CHECK_CALC_ERROR],
466 [m4_bmatch([$3], [^/],
467 [AT_PARSER_CHECK([./calc $3], $2, [], [stderr])],
471 AT_PARSER_CHECK([./calc input], $2, [], [stderr])])
473 # Normalize the observed and expected error messages, depending upon the
475 # 1. Remove the traces from observed.
490 /^yydestructor:/d' stderr >at-stderr
492 # 2. Create the reference error message.
496 # 3. If locations are not used, remove them.
497 AT_YYERROR_SEES_LOC_IF([],
498 [[sed 's/^[-0-9.]*: //' expout >at-expout
499 mv at-expout expout]])
500 # 4. If error-verbose is not used, strip the`, unexpected....' part.
501 m4_bmatch([$1], [%define parse.error verbose], [],
502 [[sed 's/syntax error, .*$/syntax error/' expout >at-expout
503 mv at-expout expout]])
505 AT_CHECK([cat stderr], 0, [expout])
509 # AT_CHECK_CALC([BISON-OPTIONS])
510 # ------------------------------
511 # Start a testing chunk which compiles `calc' grammar with
512 # BISON-OPTIONS, and performs several tests over the parser.
513 m4_define([AT_CHECK_CALC],
514 [m4_ifval([$2], [m4_fatal([$0: expected a single argument])])
516 # We use integers to avoid dependencies upon the precision of doubles.
517 AT_SETUP([Calculator $1])
519 AT_BISON_OPTION_PUSHDEFS([$1])
522 AT_FULL_COMPILE([calc], AT_DEFINES_IF([[lex], [main]]))
524 # Test the priorities.
541 # Some syntax errors.
542 _AT_CHECK_CALC_ERROR([$1], [1], [0 0], [15],
543 [1.3: syntax error, unexpected number])
544 _AT_CHECK_CALC_ERROR([$1], [1], [1//2], [20],
545 [1.3: syntax error, unexpected '/', expecting number or '-' or '(' or '!'])
546 _AT_CHECK_CALC_ERROR([$1], [1], [error], [5],
547 [1.1: syntax error, unexpected $undefined])
548 _AT_CHECK_CALC_ERROR([$1], [1], [1 = 2 = 3], [30],
549 [1.7: syntax error, unexpected '='])
550 _AT_CHECK_CALC_ERROR([$1], [1],
554 [2.1: syntax error, unexpected '+'])
555 # Exercise error messages with EOF: work on an empty file.
556 _AT_CHECK_CALC_ERROR([$1], [1], [/dev/null], [4],
557 [1.1: syntax error, unexpected end of input])
559 # Exercise the error token: without it, we die at the first error,
562 # - have several errors which exercise different shift/discardings
563 # - (): nothing to pop, nothing to discard
564 # - (1 + 1 + 1 +): a lot to pop, nothing to discard
565 # - (* * *): nothing to pop, a lot to discard
566 # - (1 + 2 * *): some to pop and discard
568 # - test the action associated to `error'
570 # - check the lookahead that triggers an error is not discarded
571 # when we enter error recovery. Below, the lookahead causing the
572 # first error is ")", which is needed to recover from the error and
573 # produce the "0" that triggers the "0 != 1" error.
575 _AT_CHECK_CALC_ERROR([$1], [0],
576 [() + (1 + 1 + 1 +) + (* * *) + (1 * 2 * *) = 1],
578 [1.2: syntax error, unexpected ')', expecting number or '-' or '(' or '!'
579 1.18: syntax error, unexpected ')', expecting number or '-' or '(' or '!'
580 1.23: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
581 1.41: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
582 calc: error: 4444 != 1])
584 # The same, but this time exercising explicitly triggered syntax errors.
585 # POSIX says the lookahead causing the error should not be discarded.
586 _AT_CHECK_CALC_ERROR([$1], [0], [(!) + (0 0) = 1], [102],
587 [1.10: syntax error, unexpected number
588 calc: error: 2222 != 1])
589 _AT_CHECK_CALC_ERROR([$1], [0], [(- *) + (0 0) = 1], [113],
590 [1.4: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
591 1.12: syntax error, unexpected number
592 calc: error: 2222 != 1])
594 # Check that yyerrok works properly: second error is not reported,
595 # third and fourth are. Parse status is succesfull.
596 _AT_CHECK_CALC_ERROR([$1], [0], [(* *) + (*) + (*)], [113],
597 [1.2: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
598 1.10: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
599 1.16: syntax error, unexpected '*', expecting number or '-' or '(' or '!'])
601 AT_BISON_OPTION_POPDEFS
609 # ------------------------ #
610 # Simple LALR Calculator. #
611 # ------------------------ #
613 AT_BANNER([[Simple LALR(1) Calculator.]])
615 # AT_CHECK_CALC_LALR([BISON-OPTIONS])
616 # -----------------------------------
617 # Start a testing chunk which compiles `calc' grammar with
618 # BISON-OPTIONS, and performs several tests over the parser.
619 m4_define([AT_CHECK_CALC_LALR],
624 AT_CHECK_CALC_LALR([%defines])
625 AT_CHECK_CALC_LALR([%locations])
627 AT_CHECK_CALC_LALR([%name-prefix="calc"]) dnl test deprecated `='
628 AT_CHECK_CALC_LALR([%verbose])
629 AT_CHECK_CALC_LALR([%yacc])
630 AT_CHECK_CALC_LALR([%define parse.error verbose])
632 AT_CHECK_CALC_LALR([%define api.pure %locations])
633 AT_CHECK_CALC_LALR([%define api.push-pull both %define api.pure %locations])
634 AT_CHECK_CALC_LALR([%define parse.error verbose %locations])
636 AT_CHECK_CALC_LALR([%define parse.error verbose %locations %defines %name-prefix "calc" %verbose %yacc])
637 AT_CHECK_CALC_LALR([%define parse.error verbose %locations %defines %name-prefix "calc" %define api.tokens.prefix "TOK_" %verbose %yacc])
639 AT_CHECK_CALC_LALR([%debug])
640 AT_CHECK_CALC_LALR([%define parse.error verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
642 AT_CHECK_CALC_LALR([%define api.pure %define parse.error verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
643 AT_CHECK_CALC_LALR([%define api.push-pull both %define api.pure %define parse.error verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
645 AT_CHECK_CALC_LALR([%define api.pure %define parse.error verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])
648 # ----------------------- #
649 # Simple GLR Calculator. #
650 # ----------------------- #
652 AT_BANNER([[Simple GLR Calculator.]])
654 # AT_CHECK_CALC_GLR([BISON-OPTIONS])
655 # ----------------------------------
656 # Start a testing chunk which compiles `calc' grammar with
657 # BISON-OPTIONS and %glr-parser, and performs several tests over the parser.
658 m4_define([AT_CHECK_CALC_GLR],
659 [AT_CHECK_CALC([%glr-parser] $@)])
664 AT_CHECK_CALC_GLR([%defines])
665 AT_CHECK_CALC_GLR([%locations])
666 AT_CHECK_CALC_GLR([%name-prefix "calc"])
667 AT_CHECK_CALC_GLR([%verbose])
668 AT_CHECK_CALC_GLR([%yacc])
669 AT_CHECK_CALC_GLR([%define parse.error verbose])
671 AT_CHECK_CALC_GLR([%define api.pure %locations])
672 AT_CHECK_CALC_GLR([%define parse.error verbose %locations])
674 AT_CHECK_CALC_GLR([%define parse.error verbose %locations %defines %name-prefix "calc" %verbose %yacc])
676 AT_CHECK_CALC_GLR([%debug])
677 AT_CHECK_CALC_GLR([%define parse.error verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
678 AT_CHECK_CALC_GLR([%define parse.error verbose %debug %locations %defines %name-prefix "calc" %define api.tokens.prefix "TOK_" %verbose %yacc])
680 AT_CHECK_CALC_GLR([%define api.pure %define parse.error verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
682 AT_CHECK_CALC_GLR([%define api.pure %define parse.error verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])
685 # ----------------------------- #
686 # Simple LALR1 C++ Calculator. #
687 # ----------------------------- #
689 AT_BANNER([[Simple LALR(1) C++ Calculator.]])
691 # First let's try using %skeleton
692 AT_CHECK_CALC([%skeleton "lalr1.cc" %defines %locations])
694 # AT_CHECK_CALC_LALR1_CC([BISON-OPTIONS])
695 # ---------------------------------------
696 # Start a testing chunk which compiles `calc' grammar with
697 # the C++ skeleton, and performs several tests over the parser.
698 m4_define([AT_CHECK_CALC_LALR1_CC],
699 [AT_CHECK_CALC([%language "C++" %defines] $@)])
701 AT_CHECK_CALC_LALR1_CC([])
702 AT_CHECK_CALC_LALR1_CC([%locations])
703 AT_CHECK_CALC_LALR1_CC([%locations %define location_type Span])
704 AT_CHECK_CALC_LALR1_CC([%locations %define parse.error verbose %name-prefix "calc" %verbose %yacc])
706 AT_CHECK_CALC_LALR1_CC([%locations %define parse.error verbose %debug %name-prefix "calc" %verbose %yacc])
708 AT_CHECK_CALC_LALR1_CC([%locations %pure-parser %define parse.error verbose %debug %name-prefix "calc" %verbose %yacc])
709 AT_CHECK_CALC_LALR1_CC([%locations %pure-parser %define parse.error verbose %debug %name-prefix "calc" %define api.tokens.prefix "TOK_" %verbose %yacc])
711 AT_CHECK_CALC_LALR1_CC([%locations %pure-parser %define parse.error verbose %debug %name-prefix "calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])
715 # --------------------------- #
716 # Simple GLR C++ Calculator. #
717 # --------------------------- #
719 AT_BANNER([[Simple GLR C++ Calculator.]])
721 # Again, we try also using %skeleton.
722 AT_CHECK_CALC([%skeleton "glr.cc" %defines %locations])
724 # AT_CHECK_CALC_GLR_CC([BISON-OPTIONS])
725 # -------------------------------------
726 # Start a testing chunk which compiles `calc' grammar with
727 # the GLR C++ skeleton, and performs several tests over the parser.
728 m4_define([AT_CHECK_CALC_GLR_CC],
729 [AT_CHECK_CALC([%language "C++" %glr-parser %defines %locations] $@)])
731 AT_CHECK_CALC_GLR_CC([])
732 AT_CHECK_CALC_GLR_CC([%define location_type Span])
733 AT_CHECK_CALC_GLR_CC([%define parse.error verbose %name-prefix "calc" %verbose %yacc])
735 AT_CHECK_CALC_GLR_CC([%debug])
736 AT_CHECK_CALC_GLR_CC([%define parse.error verbose %debug %name-prefix "calc" %verbose %yacc])
738 AT_CHECK_CALC_GLR_CC([%pure-parser %define parse.error verbose %debug %name-prefix "calc" %verbose %yacc])
739 AT_CHECK_CALC_GLR_CC([%pure-parser %define parse.error verbose %debug %name-prefix "calc" %define api.tokens.prefix "TOK_" %verbose %yacc])
741 AT_CHECK_CALC_GLR_CC([%pure-parser %define parse.error verbose %debug %name-prefix "calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])