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],
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)])[;
62 #if ]AT_API_PREFIX[DEBUG
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 assert (global_result == result);
102 assert (global_count == count);
108 m4_pushdef([AT_CALC_LEX],
111 ]AT_YYLEX_DECLARE_EXTERN[
112 static int get_char (]AT_YYLEX_FORMALS[);
113 static void unget_char (]AT_YYLEX_PRE_FORMALS[ int c);
116 static AT_YYLTYPE last_yylloc;
119 get_char (]AT_YYLEX_FORMALS[)
121 int res = getc (input);
124 last_yylloc = AT_LOC;
128 AT_LOC_LAST_COLUMN = 1;
131 AT_LOC_LAST_COLUMN++;
137 unget_char (]AT_YYLEX_PRE_FORMALS[ int c)
141 /* Wrong when C == `\n'. */
142 AT_LOC = last_yylloc;
148 read_signed_integer (]AT_YYLEX_FORMALS[)
150 int c = get_char (]AT_YYLEX_ARGS[);
157 c = get_char (]AT_YYLEX_ARGS[);
163 n = 10 * n + (c - '0');
164 c = get_char (]AT_YYLEX_ARGS[);
167 unget_char (]AT_YYLEX_PRE_ARGS[ c);
173 /*---------------------------------------------------------------.
174 | Lexical analyzer returns an integer on the stack and the token |
175 | NUM, or the ASCII character read if not a number. Skips all |
176 | blanks and tabs, returns 0 for EOF. |
177 `---------------------------------------------------------------*/
188 AT_LOC_LAST_COLUMN = 1;
189 AT_LOC_LAST_LINE = 1;
193 /* Skip current token, then white spaces. */
197 [ AT_LOC_FIRST_COLUMN = AT_LOC_LAST_COLUMN;
198 AT_LOC_FIRST_LINE = AT_LOC_LAST_LINE;
201 while ((c = get_char (]AT_YYLEX_ARGS[)) == ' ' || c == '\t');
203 /* process numbers */
204 if (c == '.' || isdigit (c))
206 unget_char (]AT_YYLEX_PRE_ARGS[ c);
207 ]AT_VAL[.ival = read_signed_integer (]AT_YYLEX_ARGS[);
208 return ]AT_TOKEN_PREFIX[NUM;
211 /* Return end-of-file. */
213 return ]AT_TOKEN_PREFIX[CALC_EOF;
215 /* Return single chars. */
220 AT_DATA_GRAMMAR([calc.y],
221 [[/* Infix notation calculator--calc */
224 [%define global_tokens_and_yystype])[
227 ]AT_LOCATION_TYPE_IF([[
241 # define YYLLOC_DEFAULT(Current, Rhs, N) \
245 (Current).first = YYRHSLOC (Rhs, 1).first; \
246 (Current).last = YYRHSLOC (Rhs, N).last; \
250 (Current).first = (Current).last = YYRHSLOC (Rhs, 0).last; \
255 /* Exercise pre-prologue dependency to %union. */
256 typedef int semantic_value;
259 /* Exercise %union. */
270 extern semantic_value global_result;
271 extern int global_count;
281 static int power (int base, int exponent);
284 [static void yyerror (AT_YYERROR_ARG_LOC_IF([AT_YYLTYPE *llocp, ])
285 AT_PARAM_IF([semantic_value *result, int *count, ])
288 ]AT_YYLEX_DECLARE_EXTERN[
291 ]AT_SKEL_CC_IF([AT_LOCATION_IF([AT_LOCATION_TYPE_IF([], [
292 /* The lalr1.cc skeleton, for backward compatibility, defines
293 a constructor for position that initializes the filename. The
294 glr.cc skeleton does not (and in fact cannot: location/position
295 are stored in a union, from which objects with constructors are
302 /* Bison Declarations */
303 %token CALC_EOF 0 "end of input"
304 %token <ival> NUM "number"
307 %nonassoc '=' /* comparison */
310 %precedence NEG /* negation--unary minus */
311 %right '^' /* exponentiation */
313 /* Grammar follows */
317 | input line { ]AT_PARAM_IF([++*count; ++global_count;])[ }
322 | exp '\n' { ]AT_PARAM_IF([*result = global_result = $1], [USE ($1)])[; }
330 fprintf (stderr, "calc: error: %d != %d\n", $1, $3);
333 | exp '+' exp { $$ = $1 + $3; }
334 | exp '-' exp { $$ = $1 - $3; }
335 | exp '*' exp { $$ = $1 * $3; }
336 | exp '/' exp { $$ = $1 / $3; }
337 | '-' exp %prec NEG { $$ = -$2; }
338 | exp '^' exp { $$ = power ($1, $3); }
339 | '(' exp ')' { $$ = $2; }
340 | '(' error ')' { $$ = 1111; yyerrok; }
341 | '!' { $$ = 0; YYERROR; }
342 | '-' error { $$ = 0; YYERROR; }
347 power (int base, int exponent)
350 assert (0 <= exponent);
351 for (/* Niente */; exponent; --exponent)
357 [AT_LOCATION_TYPE_IF([[
359 operator<< (std::ostream& o, const Span& s)
361 o << s.first.l << '.' << s.first.c;
362 if (s.first.l != s.last.l)
363 o << '-' << s.last.l << '.' << s.last.c - 1;
364 else if (s.first.c != s.last.c - 1)
365 o << '-' << s.last.c - 1;
370 [/* A C error reporting function. */
372 yyerror (AT_YYERROR_ARG_LOC_IF([AT_YYLTYPE *llocp, ])
373 AT_PARAM_IF([semantic_value *result, int *count, ])
376 AT_PARAM_IF([(void) result; (void) count;])
377 AT_YYERROR_SEES_LOC_IF([
378 fprintf (stderr, "%d.%d",
379 AT_LOC_FIRST_LINE, AT_LOC_FIRST_COLUMN);
380 if (AT_LOC_FIRST_LINE != AT_LOC_LAST_LINE)
381 fprintf (stderr, "-%d.%d",
382 AT_LOC_LAST_LINE, AT_LOC_LAST_COLUMN - 1);
383 else if (AT_LOC_FIRST_COLUMN != AT_LOC_LAST_COLUMN - 1)
384 fprintf (stderr, "-%d",
385 AT_LOC_LAST_COLUMN - 1);
386 fprintf (stderr, ": ");])
387 fprintf (stderr, "%s\n", s);
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 AT_DATA_SOURCE([[calc-main.c]AT_SKEL_CC_IF([[c]])],
400 [[#include "calc.h]AT_SKEL_CC_IF([[h]])["
404 m4_popdef([AT_CALC_MAIN])
405 m4_popdef([AT_CALC_LEX])
409 # AT_DATA_CALC_Y([BISON-OPTIONS])
410 # -------------------------------
411 # Produce `calc.y' and, if %defines was specified, `calc-lex.c' or
413 m4_define([AT_DATA_CALC_Y],
414 [_AT_DATA_CALC_Y($[1], $[2], $[3], [$1])
419 # _AT_CHECK_CALC(BISON-OPTIONS, INPUT, [NUM-STDERR-LINES])
420 # --------------------------------------------------------
421 # Run `calc' on INPUT and expect no STDOUT nor STDERR.
423 # If BISON-OPTIONS contains `%debug' but not `%glr-parser', then
425 # NUM-STDERR-LINES is the number of expected lines on stderr.
426 # Currently this is ignored, though, since the output format is fluctuating.
428 # We don't count GLR's traces yet, since its traces are somewhat
429 # different from LALR's.
430 m4_define([_AT_CHECK_CALC],
434 AT_PARSER_CHECK([./calc input], 0, [], [stderr])
438 # _AT_CHECK_CALC_ERROR(BISON-OPTIONS, EXIT-STATUS, INPUT,
439 # [NUM-STDERR-LINES],
440 # [VERBOSE-AND-LOCATED-ERROR-MESSAGE])
441 # ---------------------------------------------------------
442 # Run `calc' on INPUT, and expect a `syntax error' message.
444 # If INPUT starts with a slash, it is used as absolute input file name,
445 # otherwise as contents.
447 # NUM-STDERR-LINES is the number of expected lines on stderr.
448 # Currently this is ignored, though, since the output format is fluctuating.
450 # If BISON-OPTIONS contains `%location', then make sure the ERROR-LOCATION
451 # is correctly output on stderr.
453 # If BISON-OPTIONS contains `%define parse.error verbose', then make sure the
454 # IF-YYERROR-VERBOSE message is properly output after `syntax error, '
457 # If BISON-OPTIONS contains `%debug' but not `%glr', then NUM-STDERR-LINES
458 # is the number of expected lines on stderr.
459 m4_define([_AT_CHECK_CALC_ERROR],
460 [m4_bmatch([$3], [^/],
461 [AT_PARSER_CHECK([./calc $3], $2, [], [stderr])],
465 AT_PARSER_CHECK([./calc input], $2, [], [stderr])])
467 # Normalize the observed and expected error messages, depending upon the
469 # 1. Remove the traces from observed.
484 /^yydestructor:/d' stderr >at-stderr
486 # 2. Create the reference error message.
490 # 3. If locations are not used, remove them.
491 AT_YYERROR_SEES_LOC_IF([],
492 [[sed 's/^[-0-9.]*: //' expout >at-expout
493 mv at-expout expout]])
494 # 4. If error-verbose is not used, strip the`, unexpected....' part.
495 m4_bmatch([$1], [%define parse.error verbose], [],
496 [[sed 's/syntax error, .*$/syntax error/' expout >at-expout
497 mv at-expout expout]])
499 AT_CHECK([cat stderr], 0, [expout])
503 # AT_CHECK_CALC([BISON-OPTIONS])
504 # ------------------------------
505 # Start a testing chunk which compiles `calc' grammar with
506 # BISON-OPTIONS, and performs several tests over the parser.
507 m4_define([AT_CHECK_CALC],
508 [m4_ifval([$2], [m4_fatal([$0: expected a single argument])])
510 # We use integers to avoid dependencies upon the precision of doubles.
511 AT_SETUP([Calculator $1])
513 AT_BISON_OPTION_PUSHDEFS([$1])
516 AT_FULL_COMPILE([calc], AT_DEFINES_IF([[lex], [main]]))
518 # Test the priorities.
535 # Some syntax errors.
536 _AT_CHECK_CALC_ERROR([$1], [1], [0 0], [15],
537 [1.3: syntax error, unexpected number])
538 _AT_CHECK_CALC_ERROR([$1], [1], [1//2], [20],
539 [1.3: syntax error, unexpected '/', expecting number or '-' or '(' or '!'])
540 _AT_CHECK_CALC_ERROR([$1], [1], [error], [5],
541 [1.1: syntax error, unexpected $undefined])
542 _AT_CHECK_CALC_ERROR([$1], [1], [1 = 2 = 3], [30],
543 [1.7: syntax error, unexpected '='])
544 _AT_CHECK_CALC_ERROR([$1], [1],
548 [2.1: syntax error, unexpected '+'])
549 # Exercise error messages with EOF: work on an empty file.
550 _AT_CHECK_CALC_ERROR([$1], [1], [/dev/null], [4],
551 [1.1: syntax error, unexpected end of input])
553 # Exercise the error token: without it, we die at the first error,
556 # - have several errors which exercise different shift/discardings
557 # - (): nothing to pop, nothing to discard
558 # - (1 + 1 + 1 +): a lot to pop, nothing to discard
559 # - (* * *): nothing to pop, a lot to discard
560 # - (1 + 2 * *): some to pop and discard
562 # - test the action associated to `error'
564 # - check the lookahead that triggers an error is not discarded
565 # when we enter error recovery. Below, the lookahead causing the
566 # first error is ")", which is needed to recover from the error and
567 # produce the "0" that triggers the "0 != 1" error.
569 _AT_CHECK_CALC_ERROR([$1], [0],
570 [() + (1 + 1 + 1 +) + (* * *) + (1 * 2 * *) = 1],
572 [1.2: syntax error, unexpected ')', expecting number or '-' or '(' or '!'
573 1.18: syntax error, unexpected ')', expecting number or '-' or '(' or '!'
574 1.23: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
575 1.41: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
576 calc: error: 4444 != 1])
578 # The same, but this time exercising explicitly triggered syntax errors.
579 # POSIX says the lookahead causing the error should not be discarded.
580 _AT_CHECK_CALC_ERROR([$1], [0], [(!) + (0 0) = 1], [102],
581 [1.10: syntax error, unexpected number
582 calc: error: 2222 != 1])
583 _AT_CHECK_CALC_ERROR([$1], [0], [(- *) + (0 0) = 1], [113],
584 [1.4: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
585 1.12: syntax error, unexpected number
586 calc: error: 2222 != 1])
588 # Check that yyerrok works properly: second error is not reported,
589 # third and fourth are. Parse status is succesfull.
590 _AT_CHECK_CALC_ERROR([$1], [0], [(* *) + (*) + (*)], [113],
591 [1.2: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
592 1.10: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
593 1.16: syntax error, unexpected '*', expecting number or '-' or '(' or '!'])
595 AT_BISON_OPTION_POPDEFS
603 # ------------------------ #
604 # Simple LALR Calculator. #
605 # ------------------------ #
607 AT_BANNER([[Simple LALR(1) Calculator.]])
609 # AT_CHECK_CALC_LALR([BISON-OPTIONS])
610 # -----------------------------------
611 # Start a testing chunk which compiles `calc' grammar with
612 # BISON-OPTIONS, and performs several tests over the parser.
613 m4_define([AT_CHECK_CALC_LALR],
618 AT_CHECK_CALC_LALR([%defines])
619 AT_CHECK_CALC_LALR([%locations])
621 AT_CHECK_CALC_LALR([%name-prefix="calc"]) dnl test deprecated `='
622 AT_CHECK_CALC_LALR([%verbose])
623 AT_CHECK_CALC_LALR([%yacc])
624 AT_CHECK_CALC_LALR([%define parse.error verbose])
626 AT_CHECK_CALC_LALR([%define api.pure %locations])
627 AT_CHECK_CALC_LALR([%define api.push-pull both %define api.pure %locations])
628 AT_CHECK_CALC_LALR([%define parse.error verbose %locations])
630 AT_CHECK_CALC_LALR([%define parse.error verbose %locations %defines %define api.prefix "calc" %verbose %yacc])
631 AT_CHECK_CALC_LALR([%define parse.error verbose %locations %defines %name-prefix "calc" %define api.tokens.prefix "TOK_" %verbose %yacc])
633 AT_CHECK_CALC_LALR([%debug])
634 AT_CHECK_CALC_LALR([%define parse.error verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
635 AT_CHECK_CALC_LALR([%define parse.error verbose %debug %locations %defines %define api.prefix "calc" %verbose %yacc])
637 AT_CHECK_CALC_LALR([%define api.pure %define parse.error verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
638 AT_CHECK_CALC_LALR([%define api.push-pull both %define api.pure %define parse.error verbose %debug %locations %defines %define api.prefix "calc" %verbose %yacc])
640 AT_CHECK_CALC_LALR([%define api.pure %define parse.error verbose %debug %locations %defines %define api.prefix "calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])
643 # ----------------------- #
644 # Simple GLR Calculator. #
645 # ----------------------- #
647 AT_BANNER([[Simple GLR Calculator.]])
649 # AT_CHECK_CALC_GLR([BISON-OPTIONS])
650 # ----------------------------------
651 # Start a testing chunk which compiles `calc' grammar with
652 # BISON-OPTIONS and %glr-parser, and performs several tests over the parser.
653 m4_define([AT_CHECK_CALC_GLR],
654 [AT_CHECK_CALC([%glr-parser] $@)])
659 AT_CHECK_CALC_GLR([%defines])
660 AT_CHECK_CALC_GLR([%locations])
661 AT_CHECK_CALC_GLR([%name-prefix "calc"])
662 AT_CHECK_CALC_GLR([%define api.prefix "calc"])
663 AT_CHECK_CALC_GLR([%verbose])
664 AT_CHECK_CALC_GLR([%yacc])
665 AT_CHECK_CALC_GLR([%define parse.error verbose])
667 AT_CHECK_CALC_GLR([%define api.pure %locations])
668 AT_CHECK_CALC_GLR([%define parse.error verbose %locations])
670 AT_CHECK_CALC_GLR([%define parse.error verbose %locations %defines %name-prefix "calc" %verbose %yacc])
672 AT_CHECK_CALC_GLR([%debug])
673 AT_CHECK_CALC_GLR([%define parse.error verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
674 AT_CHECK_CALC_GLR([%define parse.error verbose %debug %locations %defines %define api.prefix "calc" %define api.tokens.prefix "TOK_" %verbose %yacc])
676 AT_CHECK_CALC_GLR([%define api.pure %define parse.error verbose %debug %locations %defines %name-prefix "calc" %verbose %yacc])
678 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}])
679 AT_CHECK_CALC_GLR([%define api.pure %define parse.error verbose %debug %locations %defines %define api.prefix "calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])
682 # ----------------------------- #
683 # Simple LALR1 C++ Calculator. #
684 # ----------------------------- #
686 AT_BANNER([[Simple LALR(1) C++ Calculator.]])
688 # First let's try using %skeleton
689 AT_CHECK_CALC([%skeleton "lalr1.cc" %defines %locations])
691 # AT_CHECK_CALC_LALR1_CC([BISON-OPTIONS])
692 # ---------------------------------------
693 # Start a testing chunk which compiles `calc' grammar with
694 # the C++ skeleton, and performs several tests over the parser.
695 m4_define([AT_CHECK_CALC_LALR1_CC],
696 [AT_CHECK_CALC([%language "C++" %defines] $@)])
698 AT_CHECK_CALC_LALR1_CC([])
699 AT_CHECK_CALC_LALR1_CC([%locations])
700 AT_CHECK_CALC_LALR1_CC([%locations %define location_type Span])
701 AT_CHECK_CALC_LALR1_CC([%locations %define parse.error verbose %name-prefix "calc" %verbose %yacc])
703 AT_CHECK_CALC_LALR1_CC([%locations %define parse.error verbose %define api.prefix "calc" %verbose %yacc])
704 AT_CHECK_CALC_LALR1_CC([%locations %define parse.error verbose %debug %name-prefix "calc" %verbose %yacc])
706 AT_CHECK_CALC_LALR1_CC([%locations %pure-parser %define parse.error verbose %debug %define api.prefix "calc" %verbose %yacc])
707 AT_CHECK_CALC_LALR1_CC([%locations %pure-parser %define parse.error verbose %debug %define api.prefix "calc" %define api.tokens.prefix "TOK_" %verbose %yacc])
709 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}])
710 AT_CHECK_CALC_LALR1_CC([%locations %pure-parser %define parse.error verbose %debug %define api.prefix "calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])
714 # --------------------------- #
715 # Simple GLR C++ Calculator. #
716 # --------------------------- #
718 AT_BANNER([[Simple GLR C++ Calculator.]])
720 # Again, we try also using %skeleton.
721 AT_CHECK_CALC([%skeleton "glr.cc" %defines %locations])
723 # AT_CHECK_CALC_GLR_CC([BISON-OPTIONS])
724 # -------------------------------------
725 # Start a testing chunk which compiles `calc' grammar with
726 # the GLR C++ skeleton, and performs several tests over the parser.
727 m4_define([AT_CHECK_CALC_GLR_CC],
728 [AT_CHECK_CALC([%language "C++" %glr-parser %defines %locations] $@)])
730 AT_CHECK_CALC_GLR_CC([])
731 AT_CHECK_CALC_GLR_CC([%define location_type Span])
732 AT_CHECK_CALC_GLR_CC([%define parse.error verbose %name-prefix "calc" %verbose %yacc])
733 AT_CHECK_CALC_GLR_CC([%define parse.error verbose %define api.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}])
742 AT_CHECK_CALC_GLR_CC([%pure-parser %define parse.error verbose %debug %define api.prefix "calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])