headers.at

bison 2.0 主要可以用来做语法分析用的

# Bison Parser Headers.                               -*- Autotest -*-
# Copyright 2001 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
# the Free Software Foundation; either version 2, or (at your option)
# any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# 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.

AT_BANNER([[Parser Headers.]])


## ---------------------- ##
## %union and --defines.  ##
## ---------------------- ##


AT_SETUP([%union and --defines])

AT_DATA([input.y],
[%union
{
  int   integer;
  char *string ;
}
%%
exp: {};
])

AT_CHECK([bison --defines input.y])

AT_CLEANUP



## --------------------- ##
## Invalid CPP headers.  ##
## --------------------- ##

# AT_TEST_CPP_GUARD_H([INPUT-FILE-BASE)
# -------------------------------------
m4_define([AT_TEST_CPP_GUARD_H],
[AT_SETUP([Invalid CPP guards: $1])

# Possibly create inner directories.
dirname=`AS_DIRNAME([$1])`
AS_MKDIR_P([$dirname])

AT_DATA_GRAMMAR([$1.y],
[%{
#include "$1.h"
%}
%%
dummy:;
%%
#include "$1.h"
])

AT_CHECK([bison --defines=$1.h --output=y.tab.c $1.y])

# CPP should be happy with it.
AT_CHECK([$CC -E -I. y.tab.c], 0, [ignore])

AT_CLEANUP
])

AT_TEST_CPP_GUARD_H([input/input])
AT_TEST_CPP_GUARD_H([9foo])



## ---------------- ##
## export YYLTYPE.  ##
## ---------------- ##


AT_SETUP([export YYLTYPE])

AT_DATA_GRAMMAR([input.y],
[%locations

%name-prefix="my_"
%{
#include <stdio.h>
#include <stdlib.h>

static int
my_lex (void)
{
  return EOF;
}

static void
my_error (const char *msg)
{
  fprintf (stderr, "%s\n", msg);
}

%}
%%
exp:;
])

AT_CHECK([bison --defines -o input.c input.y])

# YYLTYPE should be defined, and MY_LLOC declared.
AT_DATA([caller.c],
[[#include "input.h"
YYLTYPE *my_llocp = &my_lloc;

int my_parse (void);

int
main (void)
{
  return my_parse ();
}
]])

# Link and execute, just to make sure everything is fine (and in
# particular, that MY_LLOC is indeed defined somewhere).
AT_COMPILE([caller.o], [-c caller.c])
AT_COMPILE([input.o], [-c input.c])
AT_COMPILE([caller], [caller.o input.o])
AT_PARSER_CHECK([./caller])

AT_CLEANUP