/usr/share/automake-1.9/Automake/Item.pm is in automake1.9 1.9.6+nogfdl-3.1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 | # Copyright (C) 2003 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., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.
package Automake::Item;
use strict;
use Carp;
use Automake::ChannelDefs;
use Automake::DisjConditions;
=head1 NAME
Automake::Item - base class for Automake::Variable and Automake::Rule
=head1 DESCRIPTION
=head2 Methods
=over 4
=item C<new Automake::Item $name>
Create and return an empty Item called C<$name>.
=cut
sub new ($$)
{
my ($class, $name) = @_;
my $self = {
name => $name,
defs => {},
conds => {},
};
bless $self, $class;
return $self;
}
=item C<$item-E<gt>name>
Return the name of C<$item>.
=cut
sub name ($)
{
my ($self) = @_;
return $self->{'name'};
}
=item C<$item-E<gt>def ($cond)>
Return the definition for this item in condition C<$cond>, if it
exists. Return 0 otherwise.
=cut
sub def ($$)
{
my ($self, $cond) = @_;
return $self->{'defs'}{$cond} if exists $self->{'defs'}{$cond};
return 0;
}
=item C<$item-E<gt>rdef ($cond)>
Return the definition for this item in condition C<$cond>. Abort with
an internal error if the item was not defined under this condition.
The I<r> in front of C<def> stands for I<required>. One
should call C<rdef> to assert the conditional definition's existence.
=cut
sub rdef ($$)
{
my ($self, $cond) = @_;
my $d = $self->def ($cond);
prog_error ("undefined condition `" . $cond->human . "' for `"
. $self->name . "'\n" . $self->dump)
unless $d;
return $d;
}
=item C<$item-E<gt>set ($cond, $def)>
Add a new definition to an existing item.
=cut
sub set ($$$)
{
my ($self, $cond, $def) = @_;
$self->{'defs'}{$cond} = $def;
$self->{'conds'}{$cond} = $cond;
}
=item C<$var-E<gt>conditions>
Return an L<Automake::DisjConditions> describing the conditions that
that an item is defined in.
These are all the conditions for which is would be safe to call
C<rdef>.
=cut
sub conditions ($)
{
my ($self) = @_;
prog_error ("self is not a reference")
unless ref $self;
return new Automake::DisjConditions (values %{$self->{'conds'}});
}
=item C<@missing_conds = $var-E<gt>not_always_defined_in_cond ($cond)>
Check whether C<$var> is always defined for condition C<$cond>.
Return a list of conditions where the definition is missing.
For instance, given
if COND1
if COND2
A = foo
D = d1
else
A = bar
D = d2
endif
else
D = d3
endif
if COND3
A = baz
B = mumble
endif
C = mumble
we should have (we display result as conditional strings in this
illustration, but we really return DisjConditions objects):
var ('A')->not_always_defined_in_cond ('COND1_TRUE COND2_TRUE')
=> ()
var ('A')->not_always_defined_in_cond ('COND1_TRUE')
=> ()
var ('A')->not_always_defined_in_cond ('TRUE')
=> ("COND1_FALSE COND3_FALSE")
var ('B')->not_always_defined_in_cond ('COND1_TRUE')
=> ("COND1_TRUE COND3_FALSE")
var ('C')->not_always_defined_in_cond ('COND1_TRUE')
=> ()
var ('D')->not_always_defined_in_cond ('TRUE')
=> ()
var ('Z')->not_always_defined_in_cond ('TRUE')
=> ("TRUE")
=cut
sub not_always_defined_in_cond ($$)
{
my ($self, $cond) = @_;
# Compute the subconditions where $var isn't defined.
return
$self->conditions
->sub_conditions ($cond)
->invert
->multiply ($cond);
}
1;
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