-# Checking the output filenames. -*- Autotest -*-
-# Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
+# Simple calculator. -*- Autotest -*-
+# Copyright (C) 2000, 2001, 2002, 2003, 2004 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
%{
#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>
-#include <assert.h>
-
-extern void perror (const char *s);
/* Exercise pre-prologue dependency to %union. */
-typedef int value_t;
-
-value_t global_result = 0;
-int global_count = 0;
+typedef int semantic_value;
+static semantic_value global_result = 0;
+static int global_count = 0;
%}
/* Exercise %union. */
%union
{
- value_t ival;
+ semantic_value ival;
};
%{
-#if YYPURE
-# define LOC (*yylloc)
-# define VAL (*yylval)
-#else
-# define LOC (yylloc)
-# define VAL (yylval)
-#endif
-
-#define YYLLOC_FORMAL ]AT_LOCATION_IF([, YYLTYPE *yylloc])[
-#define YYLLOC_ARG ]AT_LOCATION_IF([, yylloc])[
-#define USE_YYLLOC ]AT_LOCATION_IF([(void) yylloc;])[
-
-#if YYPURE
-# define LEX_FORMALS YYSTYPE *yylval YYLLOC_FORMAL
-# define LEX_ARGS yylval YYLLOC_ARG
-# define USE_LEX_ARGS (void) yylval; USE_YYLLOC
-# define LEX_PRE_FORMALS LEX_FORMALS,
-# define LEX_PRE_ARGS LEX_ARGS,
-#else
-# define LEX_FORMALS void
-# define LEX_PRE_FORMALS
-# define LEX_ARGS
-# define LEX_PRE_ARGS
-# define USE_LEX_ARGS
-#endif
-
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_t *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 (LEX_FORMALS);
-static int yygetc (LEX_FORMALS);
-static void yyungetc (LEX_PRE_FORMALS int c);
+ );])[
+static int yylex (]AT_LEX_FORMALS[);
+static int yygetc (]AT_LEX_FORMALS[);
+static void yyungetc (]AT_LEX_PRE_FORMALS[ int c);
%}
/* Bison Declarations */
| '-' exp %prec NEG { $$ = -$2; }
| exp '^' exp { $$ = power ($1, $3); }
| '(' exp ')' { $$ = $2; }
-| '(' error ')' { $$ = 0; }
+| '(' error ')' { $$ = 1111; }
+| '!' { YYERROR; }
+| '-' error { YYERROR; }
;
%%
/* The input. */
-FILE *yyin;
+static FILE *yyin;
-static void
-yyerror (]AT_YYERROR_ARG_LOC_IF([YYLTYPE *yylloc, ])[
- ]AT_PARAM_IF([value_t *result, int *count, ])[
- const char *s
- )
+]AT_LALR1_CC_IF(
+[/* Currently, print_ is required in C++. */
+void
+yy::Parser::print_ ()
{
-]AT_PARAM_IF([(void) result; (void) count; ])[
-]AT_YYERROR_SEES_LOC_IF([
- fprintf (stderr, "%d.%d-%d.%d: ",
- LOC.first_line, LOC.first_column,
- LOC.last_line, LOC.last_column);
-])[
- fprintf (stderr, "%s\n", s);
+AT_LOCATION_IF([
+ std::cerr << location;])
}
+/* A C++ error reporting function. */
+void
+yy::Parser::error_ ()
+{
+ std::cerr << AT_LOCATION_IF([location << ": " << ])message << std::endl;
+}
+
+int
+yyparse (AT_PARAM_IF([semantic_value *result, int *count]))
+{
+ yy::Parser parser (!!YYDEBUG[]AT_LOCATION_IF([, yy::Location ()])AT_PARAM_IF([, result, count]));
+ return parser.parse ();
+}
+],
+[static void
+yyerror (AT_YYERROR_ARG_LOC_IF([YYLTYPE *yylloc, ])
+ AT_PARAM_IF([semantic_value *result, int *count, ])
+ const char *s)
+{
+AT_PARAM_IF([(void) result; (void) count;])
+AT_YYERROR_SEES_LOC_IF([
+ fprintf (stderr, "%d.%d",
+ AT_LOC.first_line, AT_LOC.first_column);
+ if (AT_LOC.first_line != AT_LOC.last_line)
+ fprintf (stderr, "-%d.%d",
+ AT_LOC.last_line, AT_LOC.last_column - 1);
+ else if (AT_LOC.first_column != AT_LOC.last_column - 1)
+ fprintf (stderr, "-%d",
+ AT_LOC.last_column - 1);
+ fprintf (stderr, ": ");])
+ fprintf (stderr, "%s\n", s);
+}])[
+
]AT_LOCATION_IF([
static YYLTYPE last_yylloc;
])[
static int
-yygetc (LEX_FORMALS)
+yygetc (]AT_LEX_FORMALS[)
{
int res = getc (yyin);
- USE_LEX_ARGS;
+ ]AT_USE_LEX_ARGS[;
]AT_LOCATION_IF([
- last_yylloc = LOC;
+ last_yylloc = AT_LOC;
if (res == '\n')
{
- LOC.last_line++;
- LOC.last_column = 1;
+AT_LALR1_CC_IF(
+[ AT_LOC.end.line++;
+ AT_LOC.end.column = 0;],
+[ AT_LOC.last_line++;
+ AT_LOC.last_column = 0;])
}
else
- LOC.last_column++;
+AT_LALR1_CC_IF(
+[ AT_LOC.end.column++;],
+[ AT_LOC.last_column++;])
])[
return res;
}
static void
-yyungetc (LEX_PRE_FORMALS int c)
+yyungetc (]AT_LEX_PRE_FORMALS[ int c)
{
- USE_LEX_ARGS;
+ ]AT_USE_LEX_ARGS[;
]AT_LOCATION_IF([
/* Wrong when C == `\n'. */
- LOC = last_yylloc;
+ AT_LOC = last_yylloc;
])[
ungetc (c, yyin);
}
static int
-read_signed_integer (LEX_FORMALS)
+read_signed_integer (]AT_LEX_FORMALS[)
{
- int c = yygetc (LEX_ARGS);
+ int c = yygetc (]AT_LEX_ARGS[);
int sign = 1;
int n = 0;
- USE_LEX_ARGS;
+ ]AT_USE_LEX_ARGS[;
if (c == '-')
{
- c = yygetc (LEX_ARGS);
+ c = yygetc (]AT_LEX_ARGS[);
sign = -1;
}
while (isdigit (c))
{
n = 10 * n + (c - '0');
- c = yygetc (LEX_ARGS);
+ c = yygetc (]AT_LEX_ARGS[);
}
- yyungetc (LEX_PRE_ARGS c);
+ yyungetc (]AT_LEX_PRE_ARGS[ c);
return sign * n;
}
`---------------------------------------------------------------*/
static int
-yylex (LEX_FORMALS)
+yylex (]AT_LEX_FORMALS[)
{
static int init = 1;
int c;
if (init)
{
init = 0;
-]AT_LOCATION_IF([
- LOC.last_column = 1;
- LOC.last_line = 1;
-])[
+]AT_LALR1_CC_IF([],
+[AT_LOCATION_IF([
+ AT_LOC.last_column = 0;
+ AT_LOC.last_line = 1;
+])])[
}
-]AT_LOCATION_IF([
- LOC.first_column = LOC.last_column;
- LOC.first_line = LOC.last_line;
-])[
+]AT_LOCATION_IF([AT_LALR1_CC_IF(
+[ AT_LOC.begin = AT_LOC.end;],
+[ AT_LOC.first_column = AT_LOC.last_column;
+ AT_LOC.first_line = AT_LOC.last_line;
+])])[
/* Skip white space. */
- while ((c = yygetc (LEX_ARGS)) == ' ' || c == '\t')
+ while ((c = yygetc (]AT_LEX_ARGS[)) == ' ' || c == '\t')
{
-]AT_LOCATION_IF([
- LOC.first_column = LOC.last_column;
- LOC.first_line = LOC.last_line;
-])[
+]AT_LOCATION_IF([AT_LALR1_CC_IF(
+[ AT_LOC.begin = AT_LOC.end;],
+[ AT_LOC.first_column = AT_LOC.last_column;
+ AT_LOC.first_line = AT_LOC.last_line;
+])])[
}
/* process numbers */
if (c == '.' || isdigit (c))
{
- yyungetc (LEX_PRE_ARGS c);
- VAL.ival = read_signed_integer (LEX_ARGS);
+ yyungetc (]AT_LEX_PRE_ARGS[ c);
+ ]AT_VAL[.ival = read_signed_integer (]AT_LEX_ARGS[);
return NUM;
}
return res;
}
+
int
main (int argc, const char **argv)
{
- value_t result = 0;
+ semantic_value result = 0;
int count = 0;
- int status = 0;
- yyin = NULL;
+ int status;
+ alarm (10);
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])[);
- assert (global_result == result);
- assert (global_count == count);
+ if (global_result != result)
+ abort ();
+ if (global_count != count)
+ abort ();
return status;
}
]])
# [NUM-DEBUG-LINES],
# [VERBOSE-AND-LOCATED-ERROR-MESSAGE])
# ---------------------------------------------------------
-# Run `calc' on INPUT, and expect a `parse error' message.
+# Run `calc' on INPUT, and expect a `syntax error' message.
#
# If INPUT starts with a slash, it is used as absolute input file name,
# otherwise as contents.
# is correctly output on stderr.
#
# If BISON-OPTIONS contains `%error-verbose', then make sure the
-# IF-YYERROR-VERBOSE message is properly output after `parse error, '
+# IF-YYERROR-VERBOSE message is properly output after `syntax error, '
# on STDERR.
#
# If BISON-OPTIONS contains `%debug' but not `%glr', then NUM-STDERR-LINES
mv at-expout expout]])
# 4. If error-verbose is not used, strip the`, unexpected....' part.
m4_bmatch([$1], [%error-verbose], [],
-[[sed 's/parse error, .*$/parse error/' expout >at-expout
+[[sed 's/syntax error, .*$/syntax error/' expout >at-expout
mv at-expout expout]])
# 5. Check
AT_CHECK([cat stderr], 0, [expout])
])
-# 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_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_GLR_IF],
-[m4_bmatch([$3], [%glr-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_LOCATION_IF([AT_GLR_IF([$1],
- [AT_PURE_IF([AT_PARAM_IF([$1], [$2])],
- [$1])])],
- [$2])])
-])
-
-
-# AT_CALC_POPDEFS
-# ---------------
-m4_define([AT_CHECK_POPDEFS],
-[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_GLR_IF])
-m4_popdef([AT_LOCATION_IF])
-m4_popdef([AT_PARAM_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_COMPILE([calc])
+AT_LALR1_CC_IF(
+ [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 = 64],
[486])
-# Some parse errors.
-_AT_CHECK_CALC_ERROR([$1], [1], [0 0], [11],
- [1.3-1.4: parse error, unexpected "number"])
-_AT_CHECK_CALC_ERROR([$1], [1], [1//2], [15],
- [1.3-1.4: parse error, unexpected '/', expecting "number" or '-' or '('])
-_AT_CHECK_CALC_ERROR([$1], [1], [error], [4],
- [1.1-1.2: parse error, unexpected $undefined, expecting "number" or '-' or '\n' or '('])
-_AT_CHECK_CALC_ERROR([$1], [1], [1 = 2 = 3], [22],
- [1.7-1.8: parse error, unexpected '='])
+# Some syntax errors.
+_AT_CHECK_CALC_ERROR([$1], [1], [0 0], [12],
+ [1.2: syntax error, unexpected "number"])
+_AT_CHECK_CALC_ERROR([$1], [1], [1//2], [16],
+ [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], [23],
+ [1.6: syntax error, unexpected '='])
_AT_CHECK_CALC_ERROR([$1], [1],
[
+1],
- [14],
- [2.1-2.2: parse error, unexpected '+'])
+ [15],
+ [2.0: syntax error, unexpected '+'])
# Exercise error messages with EOF: work on an empty file.
-_AT_CHECK_CALC_ERROR([$1], [1], [/dev/null], [4],
- [1.1-1.2: parse error, unexpected "end of input", expecting "number" or '-' or '\n' or '('])
+_AT_CHECK_CALC_ERROR([$1], [1], [/dev/null], [5],
+ [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],
-[1.5-1.6: parse error, unexpected '+', expecting "number" or '-' or '('
-1.15-1.16: parse 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],
+ [156],
+[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], [62],
+[1.9: syntax error, unexpected "number"
+calc: error: 2222 != 1])
+_AT_CHECK_CALC_ERROR([$1], [0], [(- *) + (0 0) = 1], [70],
+[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_t *result", "result" %parse-param "int *count", "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_t *result", "result" %parse-param "int *count", "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}])
+
+
+# ----------------------------- #
+# Simple LALR1 C++ Calculator. #
+# ----------------------------- #
+
+AT_BANNER([[Simple LALR1 C++ Calculator.]])
+
+# AT_CHECK_CALC_LALR1_CC([BISON-OPTIONS])
+# ---------------------------------------
+# Start a testing chunk which compiles `calc' grammar with
+# 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 %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([%debug])
+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 %parse-param {semantic_value *result} %parse-param {int *count}])
projects / bison.git / blobdiff