bison: avoid warnings from static code analysis

[bison.git] / tests / skeletons.at

# Checking skeleton support.                     -*- Autotest -*-

# Copyright (C) 2007, 2009-2015 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([[Skeleton Support.]])

## ------------------------------ ##
## Relative skeleton file names.  ##
## ------------------------------ ##

AT_SETUP([[Relative skeleton file names]])

AT_CHECK([[mkdir tmp]])

AT_DATA([[tmp/skel.c]],
[[m4@&t@_divert_push(0)d@&t@nl
@output(b4_parser_file_name@)d@&t@nl
b4_percent_define_get([[test]])
m4@&t@_divert_pop(0)
]])

AT_DATA([[skel.c]],
[[m4@&t@_divert_push(0)d@&t@nl
@output(b4_parser_file_name@)d@&t@nl
b4_percent_define_get([[test]]) -- Local
m4@&t@_divert_pop(0)
]])

AT_DATA([[tmp/input-gram.y]],
[[%skeleton "./skel.c"
%define test "Hello World"
%%
start: ;
]])

AT_DATA([[input-gram.y]],
[[%skeleton "./skel.c"
%define test "Hello World"
%%
start: ;
]])

AT_DATA([[tmp/input-cmd-line.y]],
[[%define test "Hello World"
%%
start: ;
]])

AT_BISON_CHECK([[tmp/input-gram.y]])
AT_CHECK([[cat input-gram.tab.c]], [[0]],
[[Hello World
]])

AT_BISON_CHECK([[input-gram.y]])
AT_CHECK([[cat input-gram.tab.c]], [[0]],
[[Hello World -- Local
]])

AT_BISON_CHECK([[--skeleton=tmp/skel.c tmp/input-cmd-line.y]])
AT_CHECK([[cat input-cmd-line.tab.c]], [[0]],
[[Hello World
]])

AT_CLEANUP


## ------------------------------- ##
## Installed skeleton file names.  ##
## ------------------------------- ##

AT_SETUP([[Installed skeleton file names]])

AT_BISON_OPTION_PUSHDEFS
m4_pushdef([AT_GRAM],
[[%{
  #include <stdio.h>
  ]AT_YYERROR_DECLARE[
  int yylex (void);
%}

%error-verbose
%token 'a'

%%

start: ;

%%

]AT_YYERROR_DEFINE[
int
yylex (void)
{
  return 'a';
}
]AT_MAIN_DEFINE[
]])

AT_DATA_GRAMMAR([[input-cmd-line.y]],
[AT_GRAM])

AT_DATA_GRAMMAR([[input-gram.y]],
[[%skeleton "yacc.c"]
AT_GRAM])

AT_BISON_CHECK([[--skeleton=yacc.c -o input-cmd-line.c input-cmd-line.y]])
AT_COMPILE([[input-cmd-line]])
AT_PARSER_CHECK([[./input-cmd-line]], [[1]], [],
[[syntax error, unexpected 'a', expecting $end
]])

AT_BISON_CHECK([[-o input-gram.c input-gram.y]])
AT_COMPILE([[input-gram]])
AT_PARSER_CHECK([[./input-gram]], [[1]], [],
[[syntax error, unexpected 'a', expecting $end
]])

m4_popdef([AT_GRAM])

AT_BISON_OPTION_POPDEFS
AT_CLEANUP


## ------------------------------------------------------ ##
## %define Boolean variables: invalid skeleton defaults.  ##
## ------------------------------------------------------ ##

AT_SETUP([[%define Boolean variables: invalid skeleton defaults]])

AT_DATA([[skel.c]],
[[b4_percent_define_default([[foo]], [[bogus value]])
b4_percent_define_flag_if([[foo]])
]])

AT_DATA([[input.y]],
[[%skeleton "./skel.c"
%%
start: ;
]])

AT_BISON_CHECK([[input.y]], [[1]], [[]],
[[<skeleton default value>: error: invalid value for %define Boolean variable 'foo'
]])

AT_CLEANUP


## --------------------------------------------- ##
## Complaining during macro argument expansion.  ##
## --------------------------------------------- ##

AT_SETUP([[Complaining during macro argument expansion]])

AT_DATA([[skel1.c]],
[[m4@&t@_define([foow], [b4_warn([[foow fubar]])])
m4@&t@_define([foowat], [b4_warn_at([[foow.y:2.3]],
                                    [[foow.y:5.4]], [[foowat fubar]])])
m4@&t@_define([fooc], [b4_complain([[fooc fubar]])])
m4@&t@_define([foocat], [b4_complain_at([[fooc.y:1.1]],
                                        [[fooc.y:10.6]], [[foocat fubar]])])
m4@&t@_define([foof], [b4_fatal([[foof fubar]])])
m4@&t@_if(foow, [1], [yes])
m4@&t@_if(foowat, [1], [yes])
m4@&t@_if(fooc, [1], [yes])
m4@&t@_if(foocat, [1], [yes])
m4@&t@_if(foof, [1], [yes])
]])

AT_DATA([[input1.y]],
[[%skeleton "./skel1.c"
%%
start: ;
]])

AT_BISON_CHECK([[input1.y]], [[1]], [[]],
[[input1.y: warning: foow fubar [-Wother]
foow.y:2.3-5.3: warning: foowat fubar [-Wother]
input1.y: error: fooc fubar
fooc.y:1.1-10.5: error: foocat fubar
input1.y: fatal error: foof fubar
]])

AT_DATA([[skel2.c]],
[[m4@&t@_define([foofat], [b4_fatal_at([[foof.y:12.11]],
                                       [[foof.y:100.123]], [[foofat fubar]])])
m4@&t@_if(foofat, [1], [yes])
]])

AT_DATA([[input2.y]],
[[%skeleton "./skel2.c"
%%
start: ;
]])

AT_BISON_CHECK([[input2.y]], [[1]], [[]],
[[foof.y:12.11-100.122: fatal error: foofat fubar
]])

AT_DATA([[skel3.c]],
[[b4_complain_at(b4_percent_define_get_loc([[bogus]]), [[bad value]])
]])

AT_DATA([[input3.y]],
[[%skeleton "./skel3.c"
%%
start: ;
]])

AT_BISON_CHECK([[input3.y]], [[1]], [[]],
[[input3.y: fatal error: b4_percent_define_get_loc: undefined %define variable 'bogus'
]])

AT_DATA([[skel4.c]],
[[b4_warn_at(b4_percent_define_get_syncline([[bogus]]), [[bad value]])
]])

AT_DATA([[input4.y]],
[[%skeleton "./skel4.c"
%%
start: ;
]])

AT_BISON_CHECK([[input4.y]], [[1]], [[]],
[[input4.y: fatal error: b4_percent_define_get_syncline: undefined %define variable 'bogus'
]])

AT_CLEANUP


## --------------------------------------- ##
## Fatal errors make M4 exit immediately.  ##
## --------------------------------------- ##

AT_SETUP([[Fatal errors make M4 exit immediately]])

AT_DATA([[skel1.c]],
[[b4_complain([[non-fatal error]])
b4_fatal([[M4 should exit immediately here]])
m4@&t@_fatal([this should never be evaluated])
]])

AT_DATA([[input1.y]],
[[%skeleton "./skel1.c"
%%
start: ;
]])

AT_BISON_CHECK([[input1.y]], [[1]], [[]],
[[input1.y: error: non-fatal error
input1.y: fatal error: M4 should exit immediately here
]])

AT_DATA([[skel2.c]],
[[b4_warn([[morning]])
b4_fatal_at([[foo.y:1.5]], [[foo.y:1.7]], [[M4 should exit immediately here]])
m4@&t@_fatal([this should never be evaluated])
]])

AT_DATA([[input2.y]],
[[%skeleton "./skel2.c"
%%
start: ;
]])

AT_BISON_CHECK([[input2.y]], [[1]], [[]],
[[input2.y: warning: morning [-Wother]
foo.y:1.5-6: fatal error: M4 should exit immediately here
]])

AT_CLEANUP


## ------------------------------------------------ ##
## Fatal errors but M4 continues producing output.  ##
## ------------------------------------------------ ##

# At one time, if Bison encountered a fatal error during M4 processing,
# Bison failed to drain M4's output pipe.  The result was a SIGPIPE.
# On some platforms, the default disposition for SIGPIPE is terminate,
# which was fine.  On others, it's ignore, which caused M4 to report
# the broken pipe to the user, but we don't want to bother the user with
# that.

# There is a race condition somewhere.  That is, before the associated
# fix, running this test group many times in a row would occasionally
# produce a pass among all the failures.

AT_SETUP([[Fatal errors but M4 continues producing output]])

AT_DATA([[gen-skel.pl]],
[[use warnings;
use strict;
my $M4 = "m4";
my $DNL = "d"."nl";
print "${M4}_divert_push(0)$DNL\n";
print '@output(@,@)', "\n";
(print "garbage"x10, "\n") for (1..1000);
print "${M4}_divert_pop(0)\n";
]])
AT_CHECK([[$PERL gen-skel.pl > skel.c || exit 77]])

AT_DATA([[input.y]],
[[%skeleton "./skel.c"
%%
start: ;
]])

AT_BISON_CHECK([[input.y]], [[1]], [[]],
[[input.y: fatal error: too many arguments for @output directive in skeleton
]])

AT_CLEANUP