1 # Simple calculator. -*- Autotest -*-
3 # Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free Software
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 2, or (at your option)
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, write to the Free Software
18 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 ## ---------------------------------------------------- ##
22 ## Compile the grammar described in the documentation. ##
23 ## ---------------------------------------------------- ##
26 # ------------------------- #
27 # Helping Autotest macros. #
28 # ------------------------- #
31 # _AT_DATA_CALC_Y($1, $2, $3, [BISON-DIRECTIVES])
32 # -----------------------------------------------
33 # Produce `calc.y'. Don't call this macro directly, because it contains
34 # some occurrences of `$1' etc. which will be interpreted by m4. So
35 # you should call it with $1, $2, and $3 as arguments, which is what
36 # 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 AT_DATA_GRAMMAR([calc.y],
41 [[/* Infix notation calculator--calc */
44 [%define global_tokens_and_yystype])[
54 # define alarm(seconds) /* empty */
59 /* Exercise pre-prologue dependency to %union. */
60 typedef int semantic_value;
62 static semantic_value global_result = 0;
63 static int global_count = 0;
66 /* Exercise %union. */
73 static int power (int base, int exponent);
76 [#] define YYLTYPE AT_NAME_PREFIX::location
78 #define first_line begin.line
79 #define first_column begin.column
80 #define last_line end.line
81 #define last_column end.column
83 [/* yyerror receives the location if:
84 - %location & %pure & %glr
85 - %location & %pure & %yacc & %parse-param. */
86 static void yyerror (AT_YYERROR_ARG_LOC_IF([YYLTYPE *llocp, ])
87 AT_PARAM_IF([semantic_value *result, int *count, ])
90 static int yylex (]AT_LEX_FORMALS[);
91 static int get_char (]AT_LEX_FORMALS[);
92 static void unget_char (]AT_LEX_PRE_FORMALS[ int c);
96 [/* The lalr1.cc skeleton, for backward compatibility, defines
97 a constructor for position that initializes the filename. The
98 glr.cc skeleton does not (and in fact cannot: location/position
99 are stored in a union, from which objects with constructors are
106 /* Bison Declarations */
107 %token CALC_EOF 0 "end of input"
108 %token <ival> NUM "number"
111 %nonassoc '=' /* comparison */
114 %left NEG /* negation--unary minus */
115 %right '^' /* exponentiation */
117 /* Grammar follows */
121 | input line { ]AT_PARAM_IF([++*count; ++global_count;])[ }
126 | exp '\n' { ]AT_PARAM_IF([*result = global_result = $1], [USE ($1)])[; }
134 fprintf (stderr, "calc: error: %d != %d\n", $1, $3);
137 | exp '+' exp { $$ = $1 + $3; }
138 | exp '-' exp { $$ = $1 - $3; }
139 | exp '*' exp { $$ = $1 * $3; }
140 | exp '/' exp { $$ = $1 / $3; }
141 | '-' exp %prec NEG { $$ = -$2; }
142 | exp '^' exp { $$ = power ($1, $3); }
143 | '(' exp ')' { $$ = $2; }
144 | '(' error ')' { $$ = 1111; }
145 | '!' { $$ = 0; YYERROR; }
146 | '-' error { $$ = 0; YYERROR; }
153 [/* A C++ error reporting function. */
155 AT_NAME_PREFIX::parser::error (const location& l, const std::string& m)
158 std::cerr << AT_LOCATION_IF([l << ": " << ])m << std::endl;
162 yyparse (AT_PARAM_IF([semantic_value *result, int *count]))
164 AT_NAME_PREFIX::parser parser[]AT_PARAM_IF([ (result, count)]);
166 parser.set_debug_level (1);
168 return parser.parse ();
172 yyerror (AT_YYERROR_ARG_LOC_IF([YYLTYPE *llocp, ])
173 AT_PARAM_IF([semantic_value *result, int *count, ])
176 AT_PARAM_IF([(void) result; (void) count;])
177 AT_YYERROR_SEES_LOC_IF([
178 fprintf (stderr, "%d.%d",
179 AT_LOC.first_line, AT_LOC.first_column);
180 if (AT_LOC.first_line != AT_LOC.last_line)
181 fprintf (stderr, "-%d.%d",
182 AT_LOC.last_line, AT_LOC.last_column - 1);
183 else if (AT_LOC.first_column != AT_LOC.last_column - 1)
184 fprintf (stderr, "-%d",
185 AT_LOC.last_column - 1);
186 fprintf (stderr, ": ");])
187 fprintf (stderr, "%s\n", s);
192 static YYLTYPE last_yylloc;
195 get_char (]AT_LEX_FORMALS[)
197 int res = getc (input);
200 last_yylloc = AT_LOC;
204 AT_LOC.last_column = 1;
207 AT_LOC.last_column++;
214 unget_char (]AT_LEX_PRE_FORMALS[ int c)
218 /* Wrong when C == `\n'. */
219 AT_LOC = last_yylloc;
225 read_signed_integer (]AT_LEX_FORMALS[)
227 int c = get_char (]AT_LEX_ARGS[);
234 c = get_char (]AT_LEX_ARGS[);
240 n = 10 * n + (c - '0');
241 c = get_char (]AT_LEX_ARGS[);
244 unget_char (]AT_LEX_PRE_ARGS[ c);
251 /*---------------------------------------------------------------.
252 | Lexical analyzer returns an integer on the stack and the token |
253 | NUM, or the ASCII character read if not a number. Skips all |
254 | blanks and tabs, returns 0 for EOF. |
255 `---------------------------------------------------------------*/
258 yylex (]AT_LEX_FORMALS[)
267 AT_LOC.last_column = 1;
268 AT_LOC.last_line = 1;
273 AT_LOC.first_column = AT_LOC.last_column;
274 AT_LOC.first_line = AT_LOC.last_line;
277 /* Skip white space. */
278 while ((c = get_char (]AT_LEX_ARGS[)) == ' ' || c == '\t')
281 [ AT_LOC.first_column = AT_LOC.last_column;
282 AT_LOC.first_line = AT_LOC.last_line;
286 /* process numbers */
287 if (c == '.' || isdigit (c))
289 unget_char (]AT_LEX_PRE_ARGS[ c);
290 ]AT_VAL[.ival = read_signed_integer (]AT_LEX_ARGS[);
294 /* Return end-of-file. */
298 /* Return single chars. */
303 power (int base, int exponent)
308 for (/* Niente */; exponent; --exponent)
315 main (int argc, const char **argv)
317 semantic_value result = 0;
321 /* This used to be alarm (10), but that isn't enough time for
322 a July 1995 vintage DEC Alphastation 200 4/100 system,
323 according to Nelson H. F. Beebe. 100 seconds is enough. */
327 input = fopen (argv[1], "r");
337 ]AT_SKEL_CC_IF([], [m4_bmatch([$4], [%debug],
339 status = yyparse (]AT_PARAM_IF([[&result, &count]])[);
341 if (global_result != result)
343 if (global_count != count)
351 # AT_DATA_CALC_Y([BISON-OPTIONS])
352 # -------------------------------
354 m4_define([AT_DATA_CALC_Y],
355 [_AT_DATA_CALC_Y($[1], $[2], $[3], [$1])
360 # _AT_CHECK_CALC(BISON-OPTIONS, INPUT, [NUM-STDERR-LINES])
361 # --------------------------------------------------------
362 # Run `calc' on INPUT and expect no STDOUT nor STDERR.
364 # If BISON-OPTIONS contains `%debug' but not `%glr-parser', then
366 # NUM-STDERR-LINES is the number of expected lines on stderr.
367 # Currently this is ignored, though, since the output format is fluctuating.
369 # We don't count GLR's traces yet, since its traces are somewhat
370 # different from LALR's.
371 m4_define([_AT_CHECK_CALC],
375 AT_PARSER_CHECK([./calc input], 0, [], [stderr])
379 # _AT_CHECK_CALC_ERROR(BISON-OPTIONS, EXIT-STATUS, INPUT,
380 # [NUM-STDERR-LINES],
381 # [VERBOSE-AND-LOCATED-ERROR-MESSAGE])
382 # ---------------------------------------------------------
383 # Run `calc' on INPUT, and expect a `syntax error' message.
385 # If INPUT starts with a slash, it is used as absolute input file name,
386 # otherwise as contents.
388 # NUM-STDERR-LINES is the number of expected lines on stderr.
389 # Currently this is ignored, though, since the output format is fluctuating.
391 # If BISON-OPTIONS contains `%location', then make sure the ERROR-LOCATION
392 # is correctly output on stderr.
394 # If BISON-OPTIONS contains `%error-verbose', then make sure the
395 # IF-YYERROR-VERBOSE message is properly output after `syntax error, '
398 # If BISON-OPTIONS contains `%debug' but not `%glr', then NUM-STDERR-LINES
399 # is the number of expected lines on stderr.
400 m4_define([_AT_CHECK_CALC_ERROR],
401 [m4_bmatch([$3], [^/],
402 [AT_PARSER_CHECK([./calc $3], $2, [], [stderr])],
406 AT_PARSER_CHECK([./calc input], $2, [], [stderr])])
408 # Normalize the observed and expected error messages, depending upon the
410 # 1. Remove the traces from observed.
425 /^yydestructor:/d' stderr >at-stderr
427 # 2. Create the reference error message.
431 # 3. If locations are not used, remove them.
432 AT_YYERROR_SEES_LOC_IF([],
433 [[sed 's/^[-0-9.]*: //' expout >at-expout
434 mv at-expout expout]])
435 # 4. If error-verbose is not used, strip the`, unexpected....' part.
436 m4_bmatch([$1], [%error-verbose], [],
437 [[sed 's/syntax error, .*$/syntax error/' expout >at-expout
438 mv at-expout expout]])
440 AT_CHECK([cat stderr], 0, [expout])
444 # AT_CHECK_CALC([BISON-OPTIONS, [EXPECTED-TO-FAIL]])
445 # --------------------------------------------------
446 # Start a testing chunk which compiles `calc' grammar with
447 # BISON-OPTIONS, and performs several tests over the parser.
448 # However, if EXPECTED-TO-FAIL is nonempty, this test is expected to fail.
449 m4_define([AT_CHECK_CALC],
450 [# We use integers to avoid dependencies upon the precision of doubles.
451 AT_SETUP([Calculator $1])
453 m4_ifval([$2], [AT_CHECK([exit 77])])
455 AT_BISON_OPTION_PUSHDEFS([$1])
460 [AT_CHECK([bison -o calc.cc calc.y])
461 AT_COMPILE_CXX([calc])],
462 [AT_CHECK([bison -o calc.c calc.y])
465 # Test the priorities.
482 # Some syntax errors.
483 _AT_CHECK_CALC_ERROR([$1], [1], [0 0], [15],
484 [1.3: syntax error, unexpected number])
485 _AT_CHECK_CALC_ERROR([$1], [1], [1//2], [20],
486 [1.3: syntax error, unexpected '/', expecting number or '-' or '(' or '!'])
487 _AT_CHECK_CALC_ERROR([$1], [1], [error], [5],
488 [1.1: syntax error, unexpected $undefined])
489 _AT_CHECK_CALC_ERROR([$1], [1], [1 = 2 = 3], [30],
490 [1.7: syntax error, unexpected '='])
491 _AT_CHECK_CALC_ERROR([$1], [1],
495 [2.1: syntax error, unexpected '+'])
496 # Exercise error messages with EOF: work on an empty file.
497 _AT_CHECK_CALC_ERROR([$1], [1], [/dev/null], [4],
498 [1.1: syntax error, unexpected end of input])
500 # Exercise the error token: without it, we die at the first error,
503 # - have several errors which exercise different shift/discardings
504 # - (): nothing to pop, nothing to discard
505 # - (1 + 1 + 1 +): a lot to pop, nothing to discard
506 # - (* * *): nothing to pop, a lot to discard
507 # - (1 + 2 * *): some to pop and discard
509 # - test the action associated to `error'
511 # - check the lookahead that triggers an error is not discarded
512 # when we enter error recovery. Below, the lookahead causing the
513 # first error is ")", which is needed to recover from the error and
514 # produce the "0" that triggers the "0 != 1" error.
516 _AT_CHECK_CALC_ERROR([$1], [0],
517 [() + (1 + 1 + 1 +) + (* * *) + (1 * 2 * *) = 1],
519 [1.2: syntax error, unexpected ')', expecting number or '-' or '(' or '!'
520 1.18: syntax error, unexpected ')', expecting number or '-' or '(' or '!'
521 1.23: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
522 1.41: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
523 calc: error: 4444 != 1])
525 # The same, but this time exercising explicitly triggered syntax errors.
526 # POSIX says the lookahead causing the error should not be discarded.
527 _AT_CHECK_CALC_ERROR([$1], [0], [(!) + (0 0) = 1], [102],
528 [1.10: syntax error, unexpected number
529 calc: error: 2222 != 1])
530 _AT_CHECK_CALC_ERROR([$1], [0], [(- *) + (0 0) = 1], [113],
531 [1.4: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
532 1.12: syntax error, unexpected number
533 calc: error: 2222 != 1])
534 AT_BISON_OPTION_POPDEFS
542 # ------------------------ #
543 # Simple LALR Calculator. #
544 # ------------------------ #
546 AT_BANNER([[Simple LALR(1) Calculator.]])
548 # AT_CHECK_CALC_LALR([BISON-OPTIONS])
549 # -----------------------------------
550 # Start a testing chunk which compiles `calc' grammar with
551 # BISON-OPTIONS, and performs several tests over the parser.
552 m4_define([AT_CHECK_CALC_LALR],
557 AT_CHECK_CALC_LALR([%defines])
558 AT_CHECK_CALC_LALR([%locations])
559 AT_CHECK_CALC_LALR([%name-prefix="calc"]) dnl test deprecated `='
560 AT_CHECK_CALC_LALR([%verbose])
561 AT_CHECK_CALC_LALR([%yacc])
562 AT_CHECK_CALC_LALR([%error-verbose])
564 AT_CHECK_CALC_LALR([%pure-parser %locations])
565 AT_CHECK_CALC_LALR([%push-pull-parser %pure-parser %locations])
566 AT_CHECK_CALC_LALR([%error-verbose %locations])
568 AT_CHECK_CALC_LALR([%error-verbose %locations %defines %name-prefix "calc" %verbose %yacc])
570 AT_CHECK_CALC_LALR([%debug])
571 AT_CHECK_CALC_LALR([%error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
573 AT_CHECK_CALC_LALR([%pure-parser %error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
574 AT_CHECK_CALC_LALR([%push-pull-parser %pure-parser %error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
576 AT_CHECK_CALC_LALR([%pure-parser %error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])
579 # ----------------------- #
580 # Simple GLR Calculator. #
581 # ----------------------- #
583 AT_BANNER([[Simple GLR Calculator.]])
585 # AT_CHECK_CALC_GLR([BISON-OPTIONS])
586 # ----------------------------------
587 # Start a testing chunk which compiles `calc' grammar with
588 # BISON-OPTIONS and %glr-parser, and performs several tests over the parser.
589 m4_define([AT_CHECK_CALC_GLR],
590 [AT_CHECK_CALC([%glr-parser] $@)])
595 AT_CHECK_CALC_GLR([%defines])
596 AT_CHECK_CALC_GLR([%locations])
597 AT_CHECK_CALC_GLR([%name-prefix "calc"])
598 AT_CHECK_CALC_GLR([%verbose])
599 AT_CHECK_CALC_GLR([%yacc])
600 AT_CHECK_CALC_GLR([%error-verbose])
602 AT_CHECK_CALC_GLR([%pure-parser %locations])
603 AT_CHECK_CALC_GLR([%error-verbose %locations])
605 AT_CHECK_CALC_GLR([%error-verbose %locations %defines %name-prefix "calc" %verbose %yacc])
607 AT_CHECK_CALC_GLR([%debug])
608 AT_CHECK_CALC_GLR([%error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
610 AT_CHECK_CALC_GLR([%pure-parser %error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
612 AT_CHECK_CALC_GLR([%pure-parser %error-verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])
615 # ----------------------------- #
616 # Simple LALR1 C++ Calculator. #
617 # ----------------------------- #
619 AT_BANNER([[Simple LALR(1) C++ Calculator.]])
621 # First let's try using %skeleton
622 AT_CHECK_CALC([%skeleton "lalr1.cc" %defines %locations])
624 # AT_CHECK_CALC_LALR1_CC([BISON-OPTIONS])
625 # ---------------------------------------
626 # Start a testing chunk which compiles `calc' grammar with
627 # the C++ skeleton, and performs several tests over the parser.
628 m4_define([AT_CHECK_CALC_LALR1_CC],
629 [AT_CHECK_CALC([%language "C++" %defines %locations] $@)])
631 AT_CHECK_CALC_LALR1_CC([])
632 AT_CHECK_CALC_LALR1_CC([%error-verbose %name-prefix "calc" %verbose %yacc])
634 AT_CHECK_CALC_LALR1_CC([%error-verbose %debug %name-prefix "calc" %verbose %yacc])
636 AT_CHECK_CALC_LALR1_CC([%pure-parser %error-verbose %debug %name-prefix "calc" %verbose %yacc])
638 AT_CHECK_CALC_LALR1_CC([%pure-parser %error-verbose %debug %name-prefix "calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])
642 # --------------------------- #
643 # Simple GLR C++ Calculator. #
644 # --------------------------- #
646 AT_BANNER([[Simple GLR C++ Calculator.]])
648 # Again, we try also using %skeleton.
649 AT_CHECK_CALC([%skeleton "glr.cc" %defines %locations])
651 # AT_CHECK_CALC_GLR_CC([BISON-OPTIONS])
652 # -------------------------------------
653 # Start a testing chunk which compiles `calc' grammar with
654 # the GLR C++ skeleton, and performs several tests over the parser.
655 m4_define([AT_CHECK_CALC_GLR_CC],
656 [AT_CHECK_CALC([%language "C++" %glr-parser %defines %locations] $@)])
658 AT_CHECK_CALC_GLR_CC([])
659 AT_CHECK_CALC_GLR_CC([%error-verbose %name-prefix "calc" %verbose %yacc])
661 AT_CHECK_CALC_GLR_CC([%debug])
662 AT_CHECK_CALC_GLR_CC([%error-verbose %debug %name-prefix "calc" %verbose %yacc])
664 AT_CHECK_CALC_GLR_CC([%pure-parser %error-verbose %debug %name-prefix "calc" %verbose %yacc])
666 AT_CHECK_CALC_GLR_CC([%pure-parser %error-verbose %debug %name-prefix "calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])