1 # Simple calculator. -*- Autotest -*-
3 # Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free
4 # 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[);
212 ]AT_SKEL_CC_IF([AT_LOCATION_IF([
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 %precedence 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 (AT_LOCATION_IF([const location& l, ])const std::string& m)
272 std::cerr << AT_LOCATION_IF([l << ": " << ])m << std::endl;
276 yyparse (AT_PARAM_IF([semantic_value *result, int *count]))
278 AT_NAME_PREFIX::parser parser[]AT_PARAM_IF([ (result, count)]);
280 parser.set_debug_level (1);
282 return parser.parse ();
286 yyerror (AT_YYERROR_ARG_LOC_IF([YYLTYPE *llocp, ])
287 AT_PARAM_IF([semantic_value *result, int *count, ])
290 AT_PARAM_IF([(void) result; (void) count;])
291 AT_YYERROR_SEES_LOC_IF([
292 fprintf (stderr, "%d.%d",
293 AT_LOC.first_line, AT_LOC.first_column);
294 if (AT_LOC.first_line != AT_LOC.last_line)
295 fprintf (stderr, "-%d.%d",
296 AT_LOC.last_line, AT_LOC.last_column - 1);
297 else if (AT_LOC.first_column != AT_LOC.last_column - 1)
298 fprintf (stderr, "-%d",
299 AT_LOC.last_column - 1);
300 fprintf (stderr, ": ");])
301 fprintf (stderr, "%s\n", s);
304 ]AT_DEFINES_IF(, [AT_CALC_LEX])[
307 power (int base, int exponent)
312 for (/* Niente */; exponent; --exponent)
319 main (int argc, const char **argv)
321 semantic_value result = 0;
325 /* This used to be alarm (10), but that isn't enough time for
326 a July 1995 vintage DEC Alphastation 200 4/100 system,
327 according to Nelson H. F. Beebe. 100 seconds is enough. */
331 input = fopen (argv[1], "r");
341 ]AT_SKEL_CC_IF([], [m4_bmatch([$4], [%debug],
343 status = yyparse (]AT_PARAM_IF([[&result, &count]])[);
345 if (global_result != result)
347 if (global_count != count)
352 AT_DEFINES_IF([AT_DATA_SOURCE([[calc-lex.c]AT_SKEL_CC_IF([[c]])],
353 [[#include "calc.h]AT_SKEL_CC_IF([[h]])["
356 m4_popdef([AT_CALC_LEX])
360 # AT_DATA_CALC_Y([BISON-OPTIONS])
361 # -------------------------------
362 # Produce `calc.y' and, if %defines was specified, `calc-lex.c' or
364 m4_define([AT_DATA_CALC_Y],
365 [_AT_DATA_CALC_Y($[1], $[2], $[3], [$1])
370 # _AT_CHECK_CALC(BISON-OPTIONS, INPUT, [NUM-STDERR-LINES])
371 # --------------------------------------------------------
372 # Run `calc' on INPUT and expect no STDOUT nor STDERR.
374 # If BISON-OPTIONS contains `%debug' but not `%glr-parser', then
376 # NUM-STDERR-LINES is the number of expected lines on stderr.
377 # Currently this is ignored, though, since the output format is fluctuating.
379 # We don't count GLR's traces yet, since its traces are somewhat
380 # different from LALR's.
381 m4_define([_AT_CHECK_CALC],
385 AT_PARSER_CHECK([./calc input], 0, [], [stderr])
389 # _AT_CHECK_CALC_ERROR(BISON-OPTIONS, EXIT-STATUS, INPUT,
390 # [NUM-STDERR-LINES],
391 # [VERBOSE-AND-LOCATED-ERROR-MESSAGE])
392 # ---------------------------------------------------------
393 # Run `calc' on INPUT, and expect a `syntax error' message.
395 # If INPUT starts with a slash, it is used as absolute input file name,
396 # otherwise as contents.
398 # NUM-STDERR-LINES is the number of expected lines on stderr.
399 # Currently this is ignored, though, since the output format is fluctuating.
401 # If BISON-OPTIONS contains `%location', then make sure the ERROR-LOCATION
402 # is correctly output on stderr.
404 # If BISON-OPTIONS contains `%error-verbose', then make sure the
405 # IF-YYERROR-VERBOSE message is properly output after `syntax error, '
408 # If BISON-OPTIONS contains `%debug' but not `%glr', then NUM-STDERR-LINES
409 # is the number of expected lines on stderr.
410 m4_define([_AT_CHECK_CALC_ERROR],
411 [m4_bmatch([$3], [^/],
412 [AT_PARSER_CHECK([./calc $3], $2, [], [stderr])],
416 AT_PARSER_CHECK([./calc input], $2, [], [stderr])])
418 # Normalize the observed and expected error messages, depending upon the
420 # 1. Remove the traces from observed.
435 /^yydestructor:/d' stderr >at-stderr
437 # 2. Create the reference error message.
441 # 3. If locations are not used, remove them.
442 AT_YYERROR_SEES_LOC_IF([],
443 [[sed 's/^[-0-9.]*: //' expout >at-expout
444 mv at-expout expout]])
445 # 4. If error-verbose is not used, strip the`, unexpected....' part.
446 m4_bmatch([$1], [%error-verbose], [],
447 [[sed 's/syntax error, .*$/syntax error/' expout >at-expout
448 mv at-expout expout]])
450 AT_CHECK([cat stderr], 0, [expout])
454 # AT_CHECK_CALC([BISON-OPTIONS, [EXPECTED-TO-FAIL]])
455 # --------------------------------------------------
456 # Start a testing chunk which compiles `calc' grammar with
457 # BISON-OPTIONS, and performs several tests over the parser.
458 # However, if EXPECTED-TO-FAIL is nonempty, this test is expected to fail.
459 m4_define([AT_CHECK_CALC],
460 [# We use integers to avoid dependencies upon the precision of doubles.
461 AT_SETUP([Calculator $1])
463 m4_ifval([$2], [AT_CHECK([exit 77])])
465 AT_BISON_OPTION_PUSHDEFS([$1])
468 AT_FULL_COMPILE([calc], [AT_DEFINES_IF([[lex]])])
470 # Test the priorities.
487 # Some syntax errors.
488 _AT_CHECK_CALC_ERROR([$1], [1], [0 0], [15],
489 [1.3: syntax error, unexpected number])
490 _AT_CHECK_CALC_ERROR([$1], [1], [1//2], [20],
491 [1.3: syntax error, unexpected '/', expecting number or '-' or '(' or '!'])
492 _AT_CHECK_CALC_ERROR([$1], [1], [error], [5],
493 [1.1: syntax error, unexpected $undefined])
494 _AT_CHECK_CALC_ERROR([$1], [1], [1 = 2 = 3], [30],
495 [1.7: syntax error, unexpected '='])
496 _AT_CHECK_CALC_ERROR([$1], [1],
500 [2.1: syntax error, unexpected '+'])
501 # Exercise error messages with EOF: work on an empty file.
502 _AT_CHECK_CALC_ERROR([$1], [1], [/dev/null], [4],
503 [1.1: syntax error, unexpected end of input])
505 # Exercise the error token: without it, we die at the first error,
508 # - have several errors which exercise different shift/discardings
509 # - (): nothing to pop, nothing to discard
510 # - (1 + 1 + 1 +): a lot to pop, nothing to discard
511 # - (* * *): nothing to pop, a lot to discard
512 # - (1 + 2 * *): some to pop and discard
514 # - test the action associated to `error'
516 # - check the lookahead that triggers an error is not discarded
517 # when we enter error recovery. Below, the lookahead causing the
518 # first error is ")", which is needed to recover from the error and
519 # produce the "0" that triggers the "0 != 1" error.
521 _AT_CHECK_CALC_ERROR([$1], [0],
522 [() + (1 + 1 + 1 +) + (* * *) + (1 * 2 * *) = 1],
524 [1.2: syntax error, unexpected ')', expecting number or '-' or '(' or '!'
525 1.18: syntax error, unexpected ')', expecting number or '-' or '(' or '!'
526 1.23: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
527 1.41: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
528 calc: error: 4444 != 1])
530 # The same, but this time exercising explicitly triggered syntax errors.
531 # POSIX says the lookahead causing the error should not be discarded.
532 _AT_CHECK_CALC_ERROR([$1], [0], [(!) + (0 0) = 1], [102],
533 [1.10: syntax error, unexpected number
534 calc: error: 2222 != 1])
535 _AT_CHECK_CALC_ERROR([$1], [0], [(- *) + (0 0) = 1], [113],
536 [1.4: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
537 1.12: syntax error, unexpected number
538 calc: error: 2222 != 1])
540 # Check that yyerrok works properly: second error is not reported,
541 # third and fourth are. Parse status is succesfull.
542 _AT_CHECK_CALC_ERROR([$1], [0], [(* *) + (*) + (*)], [113],
543 [1.2: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
544 1.10: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
545 1.16: syntax error, unexpected '*', expecting number or '-' or '(' or '!'])
547 AT_BISON_OPTION_POPDEFS
555 # ------------------------ #
556 # Simple LALR Calculator. #
557 # ------------------------ #
559 AT_BANNER([[Simple LALR(1) Calculator.]])
561 # AT_CHECK_CALC_LALR([BISON-OPTIONS])
562 # -----------------------------------
563 # Start a testing chunk which compiles `calc' grammar with
564 # BISON-OPTIONS, and performs several tests over the parser.
565 m4_define([AT_CHECK_CALC_LALR],
570 AT_CHECK_CALC_LALR([%defines])
571 AT_CHECK_CALC_LALR([%locations])
572 AT_CHECK_CALC_LALR([%name-prefix="calc"]) dnl test deprecated `='
573 AT_CHECK_CALC_LALR([%verbose])
574 AT_CHECK_CALC_LALR([%yacc])
575 AT_CHECK_CALC_LALR([%error-verbose])
577 AT_CHECK_CALC_LALR([%define api.pure %locations])
578 AT_CHECK_CALC_LALR([%define api.push_pull "both" %define api.pure %locations])
579 AT_CHECK_CALC_LALR([%error-verbose %locations])
581 AT_CHECK_CALC_LALR([%error-verbose %locations %defines %name-prefix "calc" %verbose %yacc])
583 AT_CHECK_CALC_LALR([%debug])
584 AT_CHECK_CALC_LALR([%error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
586 AT_CHECK_CALC_LALR([%define api.pure %error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
587 AT_CHECK_CALC_LALR([%define api.push_pull "both" %define api.pure %error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
589 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}])
592 # ----------------------- #
593 # Simple GLR Calculator. #
594 # ----------------------- #
596 AT_BANNER([[Simple GLR Calculator.]])
598 # AT_CHECK_CALC_GLR([BISON-OPTIONS])
599 # ----------------------------------
600 # Start a testing chunk which compiles `calc' grammar with
601 # BISON-OPTIONS and %glr-parser, and performs several tests over the parser.
602 m4_define([AT_CHECK_CALC_GLR],
603 [AT_CHECK_CALC([%glr-parser] $@)])
608 AT_CHECK_CALC_GLR([%defines])
609 AT_CHECK_CALC_GLR([%locations])
610 AT_CHECK_CALC_GLR([%name-prefix "calc"])
611 AT_CHECK_CALC_GLR([%verbose])
612 AT_CHECK_CALC_GLR([%yacc])
613 AT_CHECK_CALC_GLR([%error-verbose])
615 AT_CHECK_CALC_GLR([%define api.pure %locations])
616 AT_CHECK_CALC_GLR([%error-verbose %locations])
618 AT_CHECK_CALC_GLR([%error-verbose %locations %defines %name-prefix "calc" %verbose %yacc])
620 AT_CHECK_CALC_GLR([%debug])
621 AT_CHECK_CALC_GLR([%error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
623 AT_CHECK_CALC_GLR([%define api.pure %error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
625 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}])
628 # ----------------------------- #
629 # Simple LALR1 C++ Calculator. #
630 # ----------------------------- #
632 AT_BANNER([[Simple LALR(1) C++ Calculator.]])
634 # First let's try using %skeleton
635 AT_CHECK_CALC([%skeleton "lalr1.cc" %defines %locations])
637 # AT_CHECK_CALC_LALR1_CC([BISON-OPTIONS])
638 # ---------------------------------------
639 # Start a testing chunk which compiles `calc' grammar with
640 # the C++ skeleton, and performs several tests over the parser.
641 m4_define([AT_CHECK_CALC_LALR1_CC],
642 [AT_CHECK_CALC([%language "C++" %defines] $@)])
644 AT_CHECK_CALC_LALR1_CC([])
645 AT_CHECK_CALC_LALR1_CC([%locations])
646 AT_CHECK_CALC_LALR1_CC([%locations %error-verbose %name-prefix "calc" %verbose %yacc])
648 AT_CHECK_CALC_LALR1_CC([%locations %error-verbose %debug %name-prefix "calc" %verbose %yacc])
650 AT_CHECK_CALC_LALR1_CC([%locations %pure-parser %error-verbose %debug %name-prefix "calc" %verbose %yacc])
652 AT_CHECK_CALC_LALR1_CC([%locations %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}])