doc: merge HACKING and README-hacking.

[bison.git] / tests / synclines.at

# Executing Actions.                               -*- Autotest -*-
# Copyright (C) 2002, 2004, 2005, 2007 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([[User Actions.]])


# AT_SYNCLINES_COMPILE(FILE)
# --------------------------
# Compile FILE expecting an error, and save in the file stdout the
# normalized output.  Ignore the exit status, since some compilers
# (e.g. c89 on IRIX 6.5) triger warnings on `#error', instead of
# errors.
m4_define([AT_SYNCLINES_COMPILE],
[AT_CHECK([$CC $CFLAGS $CPPFLAGS -c $1], [ignore], [], [stderr])
# In case GCC displays column information, strip it down.
#
#   input.y:4:2: #error "4"    or
#   input.y:4.2: #error "4"    or
#   input.y:4:2: error: #error "4"
# =>
#   input.y:4: #error "4"
#
AT_CHECK([[sed -e 's/^\([^:]*:[^:.]*\)[.:][^:]*:\(.*\)$/\1:\2/' -e 's/^\([^:]*:[^:]*:\)[^@%:@]*\( @%:@error\)/\1\2/' stderr]], 0, [stdout])
])

# AT_TEST_SYNCLINE(TITLE, INPUT, ERROR-MSG)
# -----------------------------------------
# Check that compiling the parser produced from INPUT cause GCC
# to issue ERROR-MSG.
m4_define([AT_TEST_SYNCLINE],
[AT_SETUP([$1])

# It seems impossible to find a generic scheme to check the location
# of an error.  Even requiring GCC is not sufficient, since for instance
# the version modified by Apple:
#
# | Reading specs from /usr/libexec/gcc/darwin/ppc/2.95.2/specs
# | Apple Computer, Inc. version gcc-934.3, based on gcc version 2.95.2
# | 19991024 (release) configure:2124: $? = 0
#
# instead of:
#
# | input.y:2: #error "2"
#
# it reports:
#
# | input.y:2: "2"
# | cpp-precomp: warning: errors during smart preprocessing, retrying in basic mode

AT_DATA([syncline.c],
[[#error "1"
]])

AT_SYNCLINES_COMPILE([syncline.c])
AT_CHECK([[test "`cat stdout`" = 'syncline.c:1: @%:@error "1"' || exit 77]])

AT_DATA([[input.y]], [$2])
AT_BISON_CHECK([-o input.c input.y])
AT_SYNCLINES_COMPILE([input.c])
AT_CHECK([cat stdout], 0, [$3])
AT_CLEANUP
])


## --------------------- ##
## Prologue synch line.  ##
## --------------------- ##


AT_TEST_SYNCLINE([Prologue synch line],
[[%{
#error "2"
void yyerror (const char *s);
int yylex (void);
%}
%%
exp: '0';
]],
[input.y:2: #error "2"
])


## ------------------- ##
## %union synch line.  ##
## ------------------- ##

AT_TEST_SYNCLINE([%union synch line],
[[%union {
#error "2"
  char dummy;
}
%{
void yyerror (const char *s);
int yylex (void);
%}
%%
exp: '0';
]],
[input.y:2: #error "2"
])


## ------------------------- ##
## Postprologue synch line.  ##
## ------------------------- ##

AT_TEST_SYNCLINE([Postprologue synch line],
[[%{
void yyerror (const char *s);
int yylex (void);
%}
%union
{
  int ival;
}
%{
#error "10"
%}
%%
exp: '0';
]],
[input.y:10: #error "10"
])


## ------------------- ##
## Action synch line.  ##
## ------------------- ##

AT_TEST_SYNCLINE([Action synch line],
[[%{
void yyerror (const char *s);
int yylex (void);
%}
%%
exp:
{
#error "8"
};
]],
[input.y:8: #error "8"
])


## --------------------- ##
## Epilogue synch line.  ##
## --------------------- ##

AT_TEST_SYNCLINE([Epilogue synch line],
[[%{
void yyerror (const char *s);
int yylex (void);
%}
%%
exp: '0';
%%
#error "8"
]],
[input.y:8: #error "8"
])