-# Checking the output filenames. -*- Autotest -*-
-# Copyright (C) 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+# Simple calculator. -*- Autotest -*-
+
+# Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005 Free Software
+# Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
-# 02111-1307, USA.
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301, USA.
## ---------------------------------------------------- ##
## Compile the grammar described in the documentation. ##
%{
#include <stdio.h>
-#if STDC_HEADERS
-# include <stdlib.h>
-# include <string.h>
+#include <stdlib.h>
+#include <string.h>
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#else
+# undef alarm
+# define alarm(seconds) /* empty */
#endif
#include <ctype.h>
-extern void perror (const char *s);
-
/* Exercise pre-prologue dependency to %union. */
-typedef int value;
+typedef int semantic_value;
-static value global_result = 0;
+static semantic_value global_result = 0;
static int global_count = 0;
-
-]AT_LALR1_CC_IF([typedef yy::Location YYLTYPE;])[
%}
/* Exercise %union. */
%union
{
- value ival;
+ semantic_value ival;
};
%{
static int power (int base, int exponent);
-/* yyerror receives the location if:
+]AT_LALR1_CC_IF([typedef yy::location YYLTYPE;],
+[/* yyerror receives the location if:
- %location & %pure & %glr
- %location & %pure & %yacc & %parse-param. */
-static void yyerror (]AT_YYERROR_ARG_LOC_IF([YYLTYPE *yylloc, ])[
- ]AT_PARAM_IF([value *result, int *count, ])[
+static void yyerror (AT_YYERROR_ARG_LOC_IF([YYLTYPE *yylloc, ])
+ AT_PARAM_IF([semantic_value *result, int *count, ])
const char *s
- );
+ );])[
static int yylex (]AT_LEX_FORMALS[);
static int yygetc (]AT_LEX_FORMALS[);
static void yyungetc (]AT_LEX_PRE_FORMALS[ int c);
| '-' exp %prec NEG { $$ = -$2; }
| exp '^' exp { $$ = power ($1, $3); }
| '(' exp ')' { $$ = $2; }
-| '(' error ')' { $$ = 0; }
+| '(' error ')' { $$ = 1111; }
+| '!' { YYERROR; }
+| '-' error { YYERROR; }
;
%%
/* The input. */
static FILE *yyin;
]AT_LALR1_CC_IF(
-[/* Currently, print_ is required in C++. */
-void
-yy::Parser::print_ ()
-{
- std::cerr << location;
-}
-
-/* A C++ error reporting function. */
+[/* A C++ error reporting function. */
void
-yy::Parser::error_ ()
+yy::parser::error (const location& l, const std::string& m)
{
- std::cerr << location << ": " << message << std::endl;
+ (void) l;
+ std::cerr << AT_LOCATION_IF([l << ": " << ])m << std::endl;
}
int
-yyparse (void)
+yyparse (AT_PARAM_IF([semantic_value *result, int *count]))
{
- yy::Parser parser = yy::Parser (!!YYDEBUG[]AT_LOCATION_IF([,
- yy::Location::Location ()]));
+ yy::parser parser[]AT_PARAM_IF([ (result, count)]);
+ parser.set_debug_level (!!YYDEBUG);
return parser.parse ();
}
],
[static void
yyerror (AT_YYERROR_ARG_LOC_IF([YYLTYPE *yylloc, ])
- AT_PARAM_IF([value *result, int *count, ])
+ AT_PARAM_IF([semantic_value *result, int *count, ])
const char *s)
{
AT_PARAM_IF([(void) result; (void) count;])
])])[
}
-]AT_LALR1_CC_IF(
+]AT_LOCATION_IF([AT_LALR1_CC_IF(
[ AT_LOC.begin = AT_LOC.end;],
-[AT_LOCATION_IF([
- AT_LOC.first_column = AT_LOC.last_column;
+[ AT_LOC.first_column = AT_LOC.last_column;
AT_LOC.first_line = AT_LOC.last_line;
])])[
/* Skip white space. */
while ((c = yygetc (]AT_LEX_ARGS[)) == ' ' || c == '\t')
{
-]AT_LALR1_CC_IF(
+]AT_LOCATION_IF([AT_LALR1_CC_IF(
[ AT_LOC.begin = AT_LOC.end;],
-[AT_LOCATION_IF([
- AT_LOC.first_column = AT_LOC.last_column;
+[ AT_LOC.first_column = AT_LOC.last_column;
AT_LOC.first_line = AT_LOC.last_line;
])])[
}
int
main (int argc, const char **argv)
{
- value result = 0;
+ semantic_value result = 0;
int count = 0;
int status;
+ /* This used to be alarm (10), but that isn't enough time for
+ a July 1995 vintage DEC Alphastation 200 4/100 system,
+ according to Nelson H. F. Beebe. 100 seconds is enough. */
+ alarm (100);
+
if (argc == 2)
yyin = fopen (argv[1], "r");
else
exit (1);
}
-#if YYDEBUG
- yydebug = 1;
-#endif
+]AT_LALR1_CC_IF([], [m4_bmatch([$4], [%debug],
+[ yydebug = 1;])])[
status = yyparse (]AT_PARAM_IF([&result, &count])[);
if (global_result != result)
abort ();
])
-# AT_CALC_PUSHDEFS($1, $2, [BISON-OPTIONS])
-# -----------------------------------------
-# This macro works around the impossibility to define macros
-# inside macros, because issuing `[$1]' is not possible in M4 :(.
-# This sucks hard, GNU M4 should really provide M5 like $$1.
-m4_define([AT_CHECK_PUSHDEFS],
-[m4_if([$1$2], $[1]$[2], [],
- [m4_fatal([$0: Invalid arguments: $@])])dnl
-m4_pushdef([AT_LALR1_CC_IF],
-[m4_bmatch([$3], ["lalr1.cc"], [$1], [$2])])
-m4_pushdef([AT_GLR_IF],
-[m4_bmatch([$3], [%glr-parser], [$1], [$2])])
-m4_pushdef([AT_PARAM_IF],
-[m4_bmatch([$3], [%parse-param], [$1], [$2])])
-m4_pushdef([AT_LOCATION_IF],
-[m4_bmatch([$3], [%locations], [$1], [$2])])
-m4_pushdef([AT_PURE_IF],
-[m4_bmatch([$3], [%pure-parser], [$1], [$2])])
-m4_pushdef([AT_PURE_AND_LOC_IF],
-[m4_bmatch([$3], [%locations.*%pure-parser\|%pure-parser.*%locations],
- [$1], [$2])])
-m4_pushdef([AT_GLR_OR_PARAM_IF],
-[m4_bmatch([$3], [%glr-parser\|%parse-param], [$1], [$2])])
-
-# yyerror receives the location if %location & %pure & (%glr or %parse-param).
-m4_pushdef([AT_YYERROR_ARG_LOC_IF],
-[AT_GLR_OR_PARAM_IF([AT_PURE_AND_LOC_IF([$1], [$2])],
- [$2])])
-# yyerror cannot see the locations if !glr & pure & !param.
-m4_pushdef([AT_YYERROR_SEES_LOC_IF],
-[AT_LALR1_CC_IF([$1],
- [AT_LOCATION_IF([AT_GLR_IF([$1],
- [AT_PURE_IF([AT_PARAM_IF([$1],
- [$2])],
- [$1])])],
- [$2])])])
-
-# The interface is pure: either because %pure-parser, or because we
-# are using the C++ parsers.
-m4_pushdef([AT_PURE_LEX_IF],
-[AT_PURE_IF([$1],
- [AT_LALR1_CC_IF([$1], [$2])])])
-
-AT_PURE_LEX_IF(
-[m4_pushdef([AT_LOC], [(*yylloc)])
- m4_pushdef([AT_VAL], [(*yylval)])
- m4_pushdef([AT_LEX_FORMALS],
- [YYSTYPE *yylval[]AT_LOCATION_IF([, YYLTYPE *yylloc])])
- m4_pushdef([AT_LEX_ARGS],
- [yylval[]AT_LOCATION_IF([, yylloc])])
- m4_pushdef([AT_USE_LEX_ARGS],
- [(void) yylval;AT_LOCATION_IF([(void) yylloc])])
- m4_pushdef([AT_LEX_PRE_FORMALS],
- [AT_LEX_FORMALS, ])
- m4_pushdef([AT_LEX_PRE_ARGS],
- [AT_LEX_ARGS, ])
-],
-[m4_pushdef([AT_LOC], [(yylloc)])
- m4_pushdef([AT_VAL], [(yylval)])
- m4_pushdef([AT_LEX_FORMALS], [void])
- m4_pushdef([AT_LEX_ARGS], [])
- m4_pushdef([AT_USE_LEX_ARGS], [])
- m4_pushdef([AT_LEX_PRE_FORMALS], [])
- m4_pushdef([AT_LEX_PRE_ARGS], [])
-])
-])# AT_CALC_PUSHDEFS
-
-
-# AT_CALC_POPDEFS
-# ---------------
-m4_define([AT_CHECK_POPDEFS],
-[m4_popdef([AT_LEX_PRE_ARGS])
-m4_popdef([AT_LEX_PRE_FORMALS])
-m4_popdef([AT_USE_LEX_ARGS])
-m4_popdef([AT_LEX_ARGS])
-m4_popdef([AT_LEX_FORMALS])
-m4_popdef([AT_VAL])
-m4_popdef([AT_LOC])
-m4_popdef([AT_PURE_LEX_IF])
-m4_popdef([AT_YYERROR_SEES_LOC_IF])
-m4_popdef([AT_YYERROR_ARG_LOC_IF])
-m4_popdef([AT_GLR_OR_PARAM_IF])
-m4_popdef([AT_PURE_AND_LOC_IF])
-m4_popdef([AT_LOCATION_IF])
-m4_popdef([AT_PARAM_IF])
-m4_popdef([AT_GLR_IF])
-m4_popdef([AT_LALR1_CC_IF])
-])
-
-
-
-# AT_CHECK_CALC([BISON-OPTIONS])
+# AT_CHECK_CALC([BISON-OPTIONS [, EXPECTED-TO-FAIL]])
# ------------------------------
# Start a testing chunk which compiles `calc' grammar with
# BISON-OPTIONS, and performs several tests over the parser.
+# However, if EXPECTED-TO-FAIL is nonempty, this test is expected to fail.
m4_define([AT_CHECK_CALC],
[# We use integers to avoid dependencies upon the precision of doubles.
AT_SETUP([Calculator $1])
-AT_CHECK_PUSHDEFS($[1], $[2], [$1])
+m4_ifval([$2], [AT_CHECK([exit 77])])
-AT_DATA_CALC_Y([$1])
+AT_BISON_OPTION_PUSHDEFS([$1])
-# Specify the output files to avoid problems on different file systems.
-AT_CHECK([bison -o calc.c calc.y],
- [0], [], [])
+AT_DATA_CALC_Y([$1])
AT_LALR1_CC_IF(
-[AT_CHECK([$CXX --version || exit 77], 0, ignore, ignore)
-AT_COMPILE_CXX([calc])],
-[AT_COMPILE([calc])])
+ [AT_CHECK([bison -o calc.cc calc.y])
+ AT_COMPILE_CXX([calc])],
+ [AT_CHECK([bison -o calc.c calc.y])
+ AT_COMPILE([calc])])
# Test the priorities.
_AT_CHECK_CALC([$1],
2^2^3 = 256
(2^2)^3 = 64],
- [486])
+ [570])
# Some syntax errors.
-_AT_CHECK_CALC_ERROR([$1], [1], [0 0], [11],
- [1.2: syntax error, unexpected "number"])
-_AT_CHECK_CALC_ERROR([$1], [1], [1//2], [15],
- [1.2: syntax error, unexpected '/', expecting "number" or '-' or '('])
-_AT_CHECK_CALC_ERROR([$1], [1], [error], [4],
- [1.0: syntax error, unexpected $undefined, expecting "number" or '-' or '\n' or '('])
-_AT_CHECK_CALC_ERROR([$1], [1], [1 = 2 = 3], [22],
+_AT_CHECK_CALC_ERROR([$1], [1], [0 0], [13],
+ [1.2: syntax error, unexpected number])
+_AT_CHECK_CALC_ERROR([$1], [1], [1//2], [18],
+ [1.2: syntax error, unexpected '/', expecting number or '-' or '(' or '!'])
+_AT_CHECK_CALC_ERROR([$1], [1], [error], [5],
+ [1.0: syntax error, unexpected $undefined])
+_AT_CHECK_CALC_ERROR([$1], [1], [1 = 2 = 3], [26],
[1.6: syntax error, unexpected '='])
_AT_CHECK_CALC_ERROR([$1], [1],
[
+1],
- [14],
+ [16],
[2.0: syntax error, unexpected '+'])
# Exercise error messages with EOF: work on an empty file.
_AT_CHECK_CALC_ERROR([$1], [1], [/dev/null], [4],
- [1.0: syntax error, unexpected "end of input", expecting "number" or '-' or '\n' or '('])
+ [1.0: syntax error, unexpected end of input])
# Exercise the error token: without it, we die at the first error,
-# hence be sure i. to have several errors, ii. to test the action
-# associated to `error'.
-_AT_CHECK_CALC_ERROR([$1], [0], [(1 ++ 2) + (0 0) = 1], [82],
-[1.4: syntax error, unexpected '+', expecting "number" or '-' or '('
-1.14: syntax error, unexpected "number"
-calc: error: 0 != 1])
-
-AT_CHECK_POPDEFS
+# hence be sure to
+#
+# - have several errors which exercise different shift/discardings
+# - (): nothing to pop, nothing to discard
+# - (1 + 1 + 1 +): a lot to pop, nothing to discard
+# - (* * *): nothing to pop, a lot to discard
+# - (1 + 2 * *): some to pop and discard
+#
+# - test the action associated to `error'
+#
+# - check the look-ahead that triggers an error is not discarded
+# when we enter error recovery. Below, the look-ahead causing the
+# first error is ")", which is needed to recover from the error and
+# produce the "0" that triggers the "0 != 1" error.
+#
+_AT_CHECK_CALC_ERROR([$1], [0],
+ [() + (1 + 1 + 1 +) + (* * *) + (1 * 2 * *) = 1],
+ [188],
+[1.1: syntax error, unexpected ')', expecting number or '-' or '(' or '!'
+1.17: syntax error, unexpected ')', expecting number or '-' or '(' or '!'
+1.22: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
+1.40: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
+calc: error: 4444 != 1])
+
+# The same, but this time exercising explicitly triggered syntax errors.
+# POSIX says the look-ahead causing the error should not be discarded.
+_AT_CHECK_CALC_ERROR([$1], [0], [(!) + (0 0) = 1], [75],
+[1.9: syntax error, unexpected number
+calc: error: 2222 != 1])
+_AT_CHECK_CALC_ERROR([$1], [0], [(- *) + (0 0) = 1], [85],
+[1.3: syntax error, unexpected '*', expecting number or '-' or '(' or '!'
+1.11: syntax error, unexpected number
+calc: error: 2222 != 1])
+AT_BISON_OPTION_POPDEFS
AT_CLEANUP
])# AT_CHECK_CALC
AT_CHECK_CALC_LALR([%yacc])
AT_CHECK_CALC_LALR([%error-verbose])
+AT_CHECK_CALC_LALR([%pure-parser %locations])
AT_CHECK_CALC_LALR([%error-verbose %locations])
AT_CHECK_CALC_LALR([%error-verbose %locations %defines %name-prefix="calc" %verbose %yacc])
AT_CHECK_CALC_LALR([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])
-AT_CHECK_CALC_LALR([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc %parse-param {value *result} %parse-param {int *count}])
+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}])
# ----------------------- #
AT_CHECK_CALC_GLR([%yacc])
AT_CHECK_CALC_GLR([%error-verbose])
+AT_CHECK_CALC_GLR([%pure-parser %locations])
AT_CHECK_CALC_GLR([%error-verbose %locations])
AT_CHECK_CALC_GLR([%error-verbose %locations %defines %name-prefix="calc" %verbose %yacc])
AT_CHECK_CALC_GLR([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])
-AT_CHECK_CALC_GLR([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc %parse-param {value *result} %parse-param {int *count}])
+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}])
# ----------------------------- #
# AT_CHECK_CALC_LALR1_CC([BISON-OPTIONS])
# ---------------------------------------
# Start a testing chunk which compiles `calc' grammar with
-# BISON-OPTIONS and %glr-parser, and performs several tests over the parser.
+# the C++ skeleton, and performs several tests over the parser.
m4_define([AT_CHECK_CALC_LALR1_CC],
[AT_CHECK_CALC([%skeleton "lalr1.cc"] $@)])
# AT_CHECK_CALC_LALR1_CC()
-AT_CHECK_CALC_LALR1_CC([%defines %pure-parser %locations])
-# AT_CHECK_CALC_LALR1_CC([%defines])
+AT_CHECK_CALC_LALR1_CC([%defines %locations])
+
+AT_CHECK_CALC_LALR1_CC([%defines])
# AT_CHECK_CALC_LALR1_CC([%locations])
# AT_CHECK_CALC_LALR1_CC([%name-prefix="calc"])
# AT_CHECK_CALC_LALR1_CC([%verbose])
# AT_CHECK_CALC_LALR1_CC([%yacc])
# AT_CHECK_CALC_LALR1_CC([%error-verbose])
+# AT_CHECK_CALC_LALR1_CC([%pure-parser %locations])
# AT_CHECK_CALC_LALR1_CC([%error-verbose %locations])
-# AT_CHECK_CALC_LALR1_CC([%error-verbose %locations %defines %name-prefix="calc" %verbose %yacc])
+AT_CHECK_CALC_LALR1_CC([%error-verbose %locations %defines %name-prefix="calc" %verbose %yacc])
# AT_CHECK_CALC_LALR1_CC([%debug])
-# AT_CHECK_CALC_LALR1_CC([%error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])
+AT_CHECK_CALC_LALR1_CC([%error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])
-# AT_CHECK_CALC_LALR1_CC([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])
+AT_CHECK_CALC_LALR1_CC([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc])
-# AT_CHECK_CALC_LALR1_CC([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc %parse-param {value *result} %parse-param {int *count}])
+AT_CHECK_CALC_LALR1_CC([%pure-parser %error-verbose %debug %locations %defines %name-prefix="calc" %verbose %yacc %parse-param {semantic_value *result} %parse-param {int *count}])
projects / bison.git / blobdiff