yacc.c: initialize yylval in pure-parser mode

[bison.git] / tests / headers.at

# Bison Parser Headers.                               -*- Autotest -*-

# Copyright (C) 2001-2002, 2006-2007, 2009-2012 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 3 of the License, 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, see <http://www.gnu.org/licenses/>.

AT_BANNER([[Parser Headers.]])


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

# AT_TEST_CPP_GUARD_H(BASE-NAME, [DIRECTIVES])
# --------------------------------------------
# FIXME: Much of this can be covered by calc.at.
m4_define([AT_TEST_CPP_GUARD_H],
[AT_SETUP([Invalid CPP guards: $2 --defines=$1.h])
AT_BISON_OPTION_PUSHDEFS([$2])
# Possibly create inner directories.
dirname=`AS_DIRNAME([$1])`
AS_MKDIR_P([$dirname])

AT_DATA_GRAMMAR([$1.y],
[$2
%{
#include <$1.h>
]AT_YYERROR_DECLARE_EXTERN[
]AT_YYLEX_DECLARE_EXTERN[
%}
%%
dummy:;
%%
#include <$1.h>
])

AT_BISON_CHECK([--defines=$1.h --output=$1.c $1.y])

AT_COMPILE([$1.o], [-I. -c $1.c])

AT_BISON_OPTION_POPDEFS
AT_CLEANUP
])

AT_TEST_CPP_GUARD_H([input/input])
AT_TEST_CPP_GUARD_H([9foo])
AT_TEST_CPP_GUARD_H([input/input], [%glr-parser])
AT_TEST_CPP_GUARD_H([9foo],        [%glr-parser])



## ---------------- ##
## 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_BISON_CHECK([--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])
AT_COMPILE([input.o])
AT_COMPILE([caller], [caller.o input.o])
AT_PARSER_CHECK([./caller])

AT_CLEANUP

## ----------------- ##
## Several parsers.  ##
## ----------------- ##

AT_SETUP([Several parsers])

# AT_TEST([PREFIX], [DIRECTIVES])
# -------------------------------
# Generate and compile to *.o.  Make sure there is no (allowed) YY*
# nor yy* identifiers in the header.  Check that headers are
# self-contained, and can be compiled by a C++ compiler.
m4_pushdef([AT_TEST],
[AT_BISON_OPTION_PUSHDEFS([%define api.prefix "$1_" $2])
AT_DATA_GRAMMAR([$1.AT_SKEL_CC_IF([yy], [y])],
[[%define api.prefix "$1_"
$2
%error-verbose
%union
{
  int integer;
}
%{
#include <stdio.h>
  ]AT_YYERROR_DECLARE[
  ]AT_YYLEX_DECLARE[
%}
%%
exp:
  'x' '1' { printf ("x1\n"); }
| 'x' '2' { printf ("x2\n"); }
| 'x' '3' { printf ("x3\n"); }
| 'x' '4' { printf ("x4\n"); }
| 'x' '5' { printf ("x5\n"); }
| 'x' '6' { printf ("x6\n"); }
| 'x' '7' { printf ("x7\n"); }
| 'x' '8' { printf ("x8\n"); }
;

%%
]AT_YYERROR_DEFINE[
]AT_YYLEX_DEFINE(["$1"])[
]])

AT_BISON_CHECK([-d -o AT_SKEL_CC_IF([$1.cc $1.yy], [$1.c $1.y])])

# Check there is no 'yy' left.
# C++ output relies on namespaces and still uses yy a lot.
AT_SKEL_CC_IF([],
  [AT_CHECK([$EGREP yy $1.h], [1])])

# Check there is not 'YY' left.
# Ignore comments, YYPARSE_PARAM (obsolete), YYPUSH_MORE(_DEFINED)?
# (constant definition), YY_\w+_INCLUDED (header guards).
#
# YYDEBUG (not renamed) can be read, but not changed.
AT_CHECK([[sed -ne 's,/\*[^*]*\*/,,g;s,//.*,,' \
                -e '/YY/p' ]$1.AT_SKEL_CC_IF([hh], [h])[ |
     $EGREP -wv 'YY(PARSE_PARAM|PUSH_MORE(_DEFINED)?|_[0-9A-Z_]+_INCLUDED)|(defined|if) YYDEBUG']],
         [1])

AT_LANG_COMPILE([$1.o])
AT_CHECK([[echo "$1" >>expout]])

AT_BISON_OPTION_POPDEFS
])# AT_TEST

AT_DATA([main.cc],
[AT_DATA_SOURCE_PROLOGUE
[// If we are compiling with CC=$CXX, then do not load the C headers
// inside extern "C", since they were _not_ compiled this way.
#if ! CC_IS_CXX
extern "C"
{
#endif
  #include "x1.h"
  #include "x2.h"
  #include "x3.h"
  #include "x4.h"
  #include "x6.h"
  #include "x7.h"
  #include "x8.h"
#if ! CC_IS_CXX
}
#endif
#include "x5.hh"
//#include "x6.hh"

#define RUN(S)                                  \
  do {                                          \
    int res = S;                                \
    if (res)                                    \
      std::cerr << #S": " << res << std::endl;  \
  } while (false)

int
main (void)
{
  RUN(x1_parse());
  RUN(x2_parse());
  RUN(x3_parse());
  RUN(x4_parse());
  x5_::parser p5;
  RUN(p5.parse());
  RUN(x6_parse());
  RUN(x7_parse());
  RUN(x8_parse());
//  x6_::parser p6;
//  RUN(p6.parse());
  return 0;
}
]])# main.cc

AT_TEST([x1], [])
AT_TEST([x2], [%locations %debug])
AT_TEST([x3], [%glr-parser])
AT_TEST([x4], [%locations %debug %glr-parser])
AT_TEST([x5], [%locations %debug %language "c++"])
AT_TEST([x6], [%define api.pure])
AT_TEST([x7], [%define api.push-pull both])
AT_TEST([x8], [%define api.pure %define api.push-pull both])
#AT_TEST([x5], [%locations %language "c++" %glr-parser])

AT_COMPILE_CXX([parser], [[x[1-8].o -DCC_IS_CXX=$CC_IS_CXX main.cc]])
AT_CHECK([./parser], [0], [[expout]])

# Check that the headers are self-contained, and protected against
# multiple inclusions.  While at it, check they are sane for C++.
for h in *.h *.hh
do
  # No shell expansion with AT_DATA.
  cat >$h.cc <<EOF
AT_DATA_SOURCE_PROLOGUE
#include "$h"
#include "$h"
EOF
  AT_COMPILE_CXX([$h.o])
done

m4_popdef([AT_TEST])

AT_CLEANUP