tests: skip C++ tests if we can't compile a simple program

[bison.git] / tests / synclines.at

# Executing Actions.                               -*- Autotest -*-

# Copyright (C) 2002, 2004-2005, 2007, 2009-2013 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) trigger warnings on '#error', instead of
# errors.
m4_define([AT_SYNCLINES_COMPILE],
[AT_CHECK([$CC $CFLAGS $CPPFLAGS -c $1], [ignore], [], [stderr])

# Transform stderr into something like this:
#
#   input.y:4: #error "4"
#
# 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"
#
# It may also issue more context information:
#
#   input.y: In function 'yyparse':
#   input.y:8: #error "8"
# =>
#   input.y:4: #error "8"
#
# The message may include a caret-error (indented by GCC 4.8,
# not by clang 3.2):
#
#   input.y:1:2: error: #error "1"
#    #error "1"
#     ^
#
# Possibly distcc adds its bits.
#
#   distcc[33187] ERROR: compile (null) on localhost failed
#   syncline.c:1:2: error: #error "1"
#   distcc[33185] ERROR: compile syncline.c on localhost failed
#
# or even
#
#   distcc[35882] (dcc_connect_by_name) ERROR: failed to look up host "chrisimac": Unknown host
#   distcc[35882] Warning: failed to distribute input.c to chrisimac/4, running locally instead
#
# The compiler might end by the number of messages issued (Clang 3.2):
#
#    syncline.c:1:2: error: "1"
#    #error "1"
#     ^
#    1 error generated.
#
# When c++ is used to compiler C, we might have more messages (Clang 3.2):
#
#    clang: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated

AT_CHECK([[$PERL -p -0777 - stderr <<\EOF
  # 1. Remove useless lines.

  # distcc clutter.
  s/^distcc\[\d+\] .*\n//gm;
  # c vs. c++.
  s/^clang: warning: treating 'c' input as 'c\+\+'.*\n//gm;
  # Function context.
  s/^[^:]*: In function '[^']+':\n//gm;
  # Caret error.
  s/^ *#error.*\n *\^\n//gm;
  # Number of errors.
  s/^1 error generated\.\n//gm;

  # 2. Normalize the lines we kept.

  # Remove column.
  s/^([^:]+:\d+)[.:][^:]+:(.+)$/$][1:$][2/gm;
  # Map all combinations of "error: " and "#error: " to "#error ".
  s/^([^:]+:\d+):( |#error|error|:)+/$][1: #error /gm;
EOF
]],
  0, [stdout])
])

# AT_TEST(TITLE, INPUT, ERROR-MSG)
# --------------------------------
# Check that compiling the parser produced from INPUT cause GCC
# to issue ERROR-MSG.
m4_pushdef([AT_TEST],
[AT_SETUP([$1])
AT_BISON_OPTION_PUSHDEFS
# 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"
int i; /* avoids -pedantic warning about an empty translation unit. */
]])

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_BISON_OPTION_POPDEFS
AT_CLEANUP
])


## ------------------- ##
## Prologue syncline.  ##
## ------------------- ##


AT_TEST([Prologue syncline],
[[%{
#error "2"
]AT_YYERROR_DECLARE_EXTERN[
]AT_YYLEX_DECLARE_EXTERN[
%}
%%
exp: '0';
%%
]],
[input.y:2: #error "2"
])


## ----------------- ##
## %union syncline.  ##
## ----------------- ##

AT_TEST([%union syncline],
[[%union {
#error "2"
  char dummy;
}
%{
]AT_YYERROR_DECLARE_EXTERN[
]AT_YYLEX_DECLARE_EXTERN[
%}
%%
exp: '0';
%%
]],
[input.y:2: #error "2"
])


## ----------------------- ##
## Postprologue syncline.  ##
## ----------------------- ##

AT_TEST([Postprologue syncline],
[[%{
]AT_YYERROR_DECLARE_EXTERN[
]AT_YYLEX_DECLARE_EXTERN[
%}
%union
{
  int ival;
}
%{
#error "10"
%}
%%
exp: '0';
%%
]],
[input.y:10: #error "10"
])


## ----------------- ##
## Action syncline.  ##
## ----------------- ##

AT_TEST([Action syncline],
[[%{
]AT_YYERROR_DECLARE_EXTERN[
]AT_YYLEX_DECLARE_EXTERN[
%}
%%
exp:
{
#error "8"
};
]],
[input.y:8: #error "8"
])


## ------------------- ##
## Epilogue syncline.  ##
## ------------------- ##

AT_TEST([Epilogue syncline],
[[%{
]AT_YYERROR_DECLARE_EXTERN[
]AT_YYLEX_DECLARE_EXTERN[
%}
%%
exp: '0';
%%
#error "8"
]],
[input.y:8: #error "8"
])

## -------------------- ##
## %code top syncline.  ##
## -------------------- ##

AT_TEST([%code top syncline],
[[%code top {
#error "2"
}
%{
]AT_YYERROR_DECLARE_EXTERN[
]AT_YYLEX_DECLARE_EXTERN[
%}
%%
exp: '0';
%%
]],
[input.y:2: #error "2"
])

m4_popdef([AT_TEST])

## ----------- ##
## %no-lines.  ##
## ----------- ##

m4_pushdef([AT_TEST],
[AT_SETUP([%no-lines: $1])

AT_BISON_OPTION_PUSHDEFS([%skeleton "$1" %defines])
AT_DATA_GRAMMAR([input.y],
[%skeleton "$1" %defines
%{
]AT_YYERROR_DECLARE_EXTERN[
]AT_YYLEX_DECLARE_EXTERN[
%}
%%
exp: '0'
])
AT_BISON_CHECK([--no-lines -o input.AT_SKEL_CC_IF([cc], [c]) -d input.y])
AT_CHECK([[grep '#line' ]AT_SKEL_CC_IF([*.cc *.hh], [*.c *.h])], 1)
AT_BISON_OPTION_POPDEFS

AT_CLEANUP
])

AT_TEST([yacc.c])
AT_TEST([glr.c])
AT_TEST([lalr1.cc])
AT_TEST([glr.cc])

m4_popdef([AT_TEST])