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Пакет: perl-Class-ISA
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Class-ISA-0.36/ 0000755 0000000 0000000 00000000000 11464543532 0013126 5 ustar 00root root 0000000 0000000 Class-ISA-0.36/ChangeLog 0000644 0000000 0000000 00000001607 11464543532 0014704 0 ustar 00root root 0000000 0000000 Revision history for Perl extension Class::ISA
2009-09-29 Steffen Mueller smueller@cpan.org
* Release 0.36 -- fix installation dirs.
2009-09-26 Steffen Mueller smueller@cpan.org
* Release 0.35 -- minor documentation nit.
2009-09-22 Steffen Mueller smueller@cpan.org
* Release 0.34 -- add core deprecation logic,
some distribution shuffling. No code changes.
2004-12-29 Sean M. Burke sburke@cpan.org
* Release 0.33 -- just rebundling. No code changes.
2000-05-13 Sean M. Burke sburke@cpan.org
* Release 0.32 -- Just noting my new email address.
1999-05-14 Sean M. Burke sburke@netadventure.net
* Release 0.31 -- release version.
No changes in functionality -- just changed the core algorithm to
something that should behave the same, but is cleaner and faster.
1999-01-23 Sean M. Burke sburke@netadventure.net
* Release 0.20 -- first release version.
Class-ISA-0.36/MANIFEST 0000644 0000000 0000000 00000000316 11464543532 0014257 0 ustar 00root root 0000000 0000000 ChangeLog
lib/Class/ISA.pm
Makefile.PL
MANIFEST This list of files
MANIFEST.SKIP
README
t/00_about_verbose.t
t/01_old_junk.t
META.yml Module meta-data (added by MakeMaker)
Class-ISA-0.36/MANIFEST.SKIP 0000644 0000000 0000000 00000000136 11464543532 0015024 0 ustar 00root root 0000000 0000000 ^MANIFEST\.bak$
Makefile(\.old)?$
\.rej$
CVS
blib
~
.svn
Class-ISA-.*\.tar\.gz$
\.swp$
\.swo$
Class-ISA-0.36/META.yml 0000644 0000000 0000000 00000000732 11464543532 0014401 0 ustar 00root root 0000000 0000000 --- #YAML:1.0
name: Class-ISA
version: 0.36
abstract: ~
author: []
license: unknown
distribution_type: module
configure_requires:
ExtUtils::MakeMaker: 0
build_requires:
ExtUtils::MakeMaker: 0
requires:
if: 0
no_index:
directory:
- t
- inc
generated_by: ExtUtils::MakeMaker version 6.54
meta-spec:
url: http://module-build.sourceforge.net/META-spec-v1.4.html
version: 1.4
Class-ISA-0.36/Makefile.PL 0000644 0000000 0000000 00000001166 11464543532 0015104 0 ustar 00root root 0000000 0000000 # This -*-perl-*- script writes the Makefile for installing this distribution.
#
# See "perldoc perlmodinstall" or "perldoc ExtUtils::MakeMaker" for
# info on how to control how the installation goes.
#
# Time-stamp: "2004-12-29 20:20:52 AST"
require 5.004;
use strict;
use ExtUtils::MakeMaker;
WriteMakefile(
'NAME' => 'Class::ISA',
'VERSION_FROM' => 'lib/Class/ISA.pm', # finds $VERSION
'PREREQ_PM' => {
'if' => '0',
},
'dist' => { COMPRESS => 'gzip -6f', SUFFIX => 'gz', },
'INSTALLDIRS' => ((($] >= 5.007003) && ($] < 5.011)) ? 'perl' : 'site'),
);
Class-ISA-0.36/README 0000644 0000000 0000000 00000011375 11464543532 0014015 0 ustar 00root root 0000000 0000000 NAME
Class::ISA -- report the search path for a class's ISA tree
SYNOPSIS
# Suppose you go: use Food::Fishstick, and that uses and
# inherits from other things, which in turn use and inherit
# from other things. And suppose, for sake of brevity of
# example, that their ISA tree is the same as:
@Food::Fishstick::ISA = qw(Food::Fish Life::Fungus Chemicals);
@Food::Fish::ISA = qw(Food);
@Food::ISA = qw(Matter);
@Life::Fungus::ISA = qw(Life);
@Chemicals::ISA = qw(Matter);
@Life::ISA = qw(Matter);
@Matter::ISA = qw();
use Class::ISA;
print "Food::Fishstick path is:\n ",
join(", ", Class::ISA::super_path('Food::Fishstick')),
"\n";
That prints:
Food::Fishstick path is:
Food::Fish, Food, Matter, Life::Fungus, Life, Chemicals
DESCRIPTION
Suppose you have a class (like Food::Fish::Fishstick) that is derived,
via its @ISA, from one or more superclasses (as Food::Fish::Fishstick is
from Food::Fish, Life::Fungus, and Chemicals), and some of those
superclasses may themselves each be derived, via its @ISA, from one or
more superclasses (as above).
When, then, you call a method in that class ($fishstick->calories), Perl
first searches there for that method, but if it's not there, it goes
searching in its superclasses, and so on, in a depth-first (or maybe
"height-first" is the word) search. In the above example, it'd first
look in Food::Fish, then Food, then Matter, then Life::Fungus, then
Life, then Chemicals.
This library, Class::ISA, provides functions that return that list --
the list (in order) of names of classes Perl would search to find a
method, with no duplicates.
FUNCTIONS
the function Class::ISA::super_path($CLASS)
This returns the ordered list of names of classes that Perl would
search thru in order to find a method, with no duplicates in the
list. $CLASS is not included in the list. UNIVERSAL is not included
-- if you need to consider it, add it to the end.
the function Class::ISA::self_and_super_path($CLASS)
Just like "super_path", except that $CLASS is included as the first
element.
the function Class::ISA::self_and_super_versions($CLASS)
This returns a hash whose keys are $CLASS and its
(super-)superclasses, and whose values are the contents of each
class's $VERSION (or undef, for classes with no $VERSION).
The code for self_and_super_versions is meant to serve as an example
for precisely the kind of tasks I anticipate that
self_and_super_path and super_path will be used for. You are
strongly advised to read the source for self_and_super_versions, and
the comments there.
CAUTIONARY NOTES
* Class::ISA doesn't export anything. You have to address the functions
with a "Class::ISA::" on the front.
* Contrary to its name, Class::ISA isn't a class; it's just a package.
Strange, isn't it?
* Say you have a loop in the ISA tree of the class you're calling one of
the Class::ISA functions on: say that Food inherits from Matter, but
Matter inherits from Food (for sake of argument). If Perl, while
searching for a method, actually discovers this cyclicity, it will throw
a fatal error. The functions in Class::ISA effectively ignore this
cyclicity; the Class::ISA algorithm is "never go down the same path
twice", and cyclicities are just a special case of that.
* The Class::ISA functions just look at @ISAs. But theoretically, I
suppose, AUTOLOADs could bypass Perl's ISA-based search mechanism and do
whatever they please. That would be bad behavior, tho; and I try not to
think about that.
* If Perl can't find a method anywhere in the ISA tree, it then looks in
the magical class UNIVERSAL. This is rarely relevant to the tasks that I
expect Class::ISA functions to be put to, but if it matters to you, then
instead of this:
@supers = Class::Tree::super_path($class);
do this:
@supers = (Class::Tree::super_path($class), 'UNIVERSAL');
And don't say no-one ever told ya!
* When you call them, the Class::ISA functions look at @ISAs anew --
that is, there is no memoization, and so if ISAs change during runtime,
you get the current ISA tree's path, not anything memoized. However,
changing ISAs at runtime is probably a sign that you're out of your
mind!
COPYRIGHT AND LICENSE
Copyright (c) 1999-2009 Sean M. Burke. All rights reserved.
This library is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
AUTHOR
Sean M. Burke "sburke@cpan.org"
MAINTAINER
Maintained by Steffen Mueller "smueller@cpan.org".
Class-ISA-0.36/lib/ 0000755 0000000 0000000 00000000000 11464543532 0013674 5 ustar 00root root 0000000 0000000 Class-ISA-0.36/lib/Class/ 0000755 0000000 0000000 00000000000 11464543532 0014741 5 ustar 00root root 0000000 0000000 Class-ISA-0.36/lib/Class/ISA.pm 0000644 0000000 0000000 00000015621 11464543532 0015720 0 ustar 00root root 0000000 0000000 package Class::ISA;
require 5;
use strict;
use vars qw($Debug $VERSION);
$VERSION = '0.36';
$Debug = 0 unless defined $Debug;
use if $] >= 5.011, 'deprecate';
###########################################################################
sub self_and_super_versions {
no strict 'refs';
map {
$_ => (defined(${"$_\::VERSION"}) ? ${"$_\::VERSION"} : undef)
} self_and_super_path($_[0])
}
# Also consider magic like:
# no strict 'refs';
# my %class2SomeHashr =
# map { defined(%{"$_\::SomeHash"}) ? ($_ => \%{"$_\::SomeHash"}) : () }
# Class::ISA::self_and_super_path($class);
# to get a hash of refs to all the defined (and non-empty) hashes in
# $class and its superclasses.
#
# Or even consider this incantation for doing something like hash-data
# inheritance:
# no strict 'refs';
# %union_hash =
# map { defined(%{"$_\::SomeHash"}) ? %{"$_\::SomeHash"}) : () }
# reverse(Class::ISA::self_and_super_path($class));
# Consider that reverse() is necessary because with
# %foo = ('a', 'wun', 'b', 'tiw', 'a', 'foist');
# $foo{'a'} is 'foist', not 'wun'.
###########################################################################
sub super_path {
my @ret = &self_and_super_path(@_);
shift @ret if @ret;
return @ret;
}
#--------------------------------------------------------------------------
sub self_and_super_path {
# Assumption: searching is depth-first.
# Assumption: '' (empty string) can't be a class package name.
# Note: 'UNIVERSAL' is not given any special treatment.
return () unless @_;
my @out = ();
my @in_stack = ($_[0]);
my %seen = ($_[0] => 1);
my $current;
while(@in_stack) {
next unless defined($current = shift @in_stack) && length($current);
print "At $current\n" if $Debug;
push @out, $current;
no strict 'refs';
unshift @in_stack,
map
{ my $c = $_; # copy, to avoid being destructive
substr($c,0,2) = "main::" if substr($c,0,2) eq '::';
# Canonize the :: -> main::, ::foo -> main::foo thing.
# Should I ever canonize the Foo'Bar = Foo::Bar thing?
$seen{$c}++ ? () : $c;
}
@{"$current\::ISA"}
;
# I.e., if this class has any parents (at least, ones I've never seen
# before), push them, in order, onto the stack of classes I need to
# explore.
}
return @out;
}
#--------------------------------------------------------------------------
1;
__END__
=head1 NAME
Class::ISA - report the search path for a class's ISA tree
=head1 SYNOPSIS
# Suppose you go: use Food::Fishstick, and that uses and
# inherits from other things, which in turn use and inherit
# from other things. And suppose, for sake of brevity of
# example, that their ISA tree is the same as:
@Food::Fishstick::ISA = qw(Food::Fish Life::Fungus Chemicals);
@Food::Fish::ISA = qw(Food);
@Food::ISA = qw(Matter);
@Life::Fungus::ISA = qw(Life);
@Chemicals::ISA = qw(Matter);
@Life::ISA = qw(Matter);
@Matter::ISA = qw();
use Class::ISA;
print "Food::Fishstick path is:\n ",
join(", ", Class::ISA::super_path('Food::Fishstick')),
"\n";
That prints:
Food::Fishstick path is:
Food::Fish, Food, Matter, Life::Fungus, Life, Chemicals
=head1 DESCRIPTION
Suppose you have a class (like Food::Fish::Fishstick) that is derived,
via its @ISA, from one or more superclasses (as Food::Fish::Fishstick
is from Food::Fish, Life::Fungus, and Chemicals), and some of those
superclasses may themselves each be derived, via its @ISA, from one or
more superclasses (as above).
When, then, you call a method in that class ($fishstick->calories),
Perl first searches there for that method, but if it's not there, it
goes searching in its superclasses, and so on, in a depth-first (or
maybe "height-first" is the word) search. In the above example, it'd
first look in Food::Fish, then Food, then Matter, then Life::Fungus,
then Life, then Chemicals.
This library, Class::ISA, provides functions that return that list --
the list (in order) of names of classes Perl would search to find a
method, with no duplicates.
=head1 FUNCTIONS
=over
=item the function Class::ISA::super_path($CLASS)
This returns the ordered list of names of classes that Perl would
search thru in order to find a method, with no duplicates in the list.
$CLASS is not included in the list. UNIVERSAL is not included -- if
you need to consider it, add it to the end.
=item the function Class::ISA::self_and_super_path($CLASS)
Just like C<super_path>, except that $CLASS is included as the first
element.
=item the function Class::ISA::self_and_super_versions($CLASS)
This returns a hash whose keys are $CLASS and its
(super-)superclasses, and whose values are the contents of each
class's $VERSION (or undef, for classes with no $VERSION).
The code for self_and_super_versions is meant to serve as an example
for precisely the kind of tasks I anticipate that self_and_super_path
and super_path will be used for. You are strongly advised to read the
source for self_and_super_versions, and the comments there.
=back
=head1 CAUTIONARY NOTES
* Class::ISA doesn't export anything. You have to address the
functions with a "Class::ISA::" on the front.
* Contrary to its name, Class::ISA isn't a class; it's just a package.
Strange, isn't it?
* Say you have a loop in the ISA tree of the class you're calling one
of the Class::ISA functions on: say that Food inherits from Matter,
but Matter inherits from Food (for sake of argument). If Perl, while
searching for a method, actually discovers this cyclicity, it will
throw a fatal error. The functions in Class::ISA effectively ignore
this cyclicity; the Class::ISA algorithm is "never go down the same
path twice", and cyclicities are just a special case of that.
* The Class::ISA functions just look at @ISAs. But theoretically, I
suppose, AUTOLOADs could bypass Perl's ISA-based search mechanism and
do whatever they please. That would be bad behavior, tho; and I try
not to think about that.
* If Perl can't find a method anywhere in the ISA tree, it then looks
in the magical class UNIVERSAL. This is rarely relevant to the tasks
that I expect Class::ISA functions to be put to, but if it matters to
you, then instead of this:
@supers = Class::Tree::super_path($class);
do this:
@supers = (Class::Tree::super_path($class), 'UNIVERSAL');
And don't say no-one ever told ya!
* When you call them, the Class::ISA functions look at @ISAs anew --
that is, there is no memoization, and so if ISAs change during
runtime, you get the current ISA tree's path, not anything memoized.
However, changing ISAs at runtime is probably a sign that you're out
of your mind!
=head1 COPYRIGHT AND LICENSE
Copyright (c) 1999-2009 Sean M. Burke. All rights reserved.
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
=head1 AUTHOR
Sean M. Burke C<sburke@cpan.org>
=head1 MAINTAINER
Maintained by Steffen Mueller C<smueller@cpan.org>.
=cut
Class-ISA-0.36/t/ 0000755 0000000 0000000 00000000000 11464543532 0013371 5 ustar 00root root 0000000 0000000 Class-ISA-0.36/t/00_about_verbose.t 0000644 0000000 0000000 00000004276 11464543532 0016725 0 ustar 00root root 0000000 0000000 BEGIN {
chdir 't' if -d 't';
#@INC = '../lib';
}
require 5;
# Time-stamp: "2004-12-29 20:57:15 AST"
# Summary of, well, things.
use Test;
BEGIN {plan tests => 2};
ok 1;
use Class::ISA ();
#chdir "t" if -e "t";
{
my @out;
push @out,
"\n\nPerl v",
defined($^V) ? sprintf('%vd', $^V) : $],
" under $^O ",
(defined(&Win32::BuildNumber) and defined &Win32::BuildNumber())
? ("(Win32::BuildNumber ", &Win32::BuildNumber(), ")") : (),
(defined $MacPerl::Version)
? ("(MacPerl version $MacPerl::Version)") : (),
"\n"
;
# Ugly code to walk the symbol tables:
my %v;
my @stack = (''); # start out in %::
my $this;
my $count = 0;
my $pref;
while(@stack) {
$this = shift @stack;
die "Too many packages?" if ++$count > 1000;
next if exists $v{$this};
next if $this eq 'main'; # %main:: is %::
#print "Peeking at $this => ${$this . '::VERSION'}\n";
if(defined ${$this . '::VERSION'} ) {
$v{$this} = ${$this . '::VERSION'}
} elsif(
defined *{$this . '::ISA'} or defined &{$this . '::import'}
or ($this ne '' and grep defined *{$_}{'CODE'}, values %{$this . "::"})
# If it has an ISA, an import, or any subs...
) {
# It's a class/module with no version.
$v{$this} = undef;
} else {
# It's probably an unpopulated package.
## $v{$this} = '...';
}
$pref = length($this) ? "$this\::" : '';
push @stack, map m/^(.+)::$/ ? "$pref$1" : (), keys %{$this . '::'};
#print "Stack: @stack\n";
}
push @out, " Modules in memory:\n";
delete @v{'', '[none]'};
foreach my $p (sort {lc($a) cmp lc($b)} keys %v) {
$indent = ' ' x (2 + ($p =~ tr/:/:/));
push @out, ' ', $indent, $p, defined($v{$p}) ? " v$v{$p};\n" : ";\n";
}
push @out, sprintf "[at %s (local) / %s (GMT)]\n",
scalar(gmtime), scalar(localtime);
my $x = join '', @out;
$x =~ s/^/#/mg;
print $x;
}
print "# Running",
(chr(65) eq 'A') ? " in an ASCII world.\n" : " in a non-ASCII world.\n",
"#\n",
;
print "# \@INC:\n", map("# [$_]\n", @INC), "#\n#\n";
print "# \%INC:\n";
foreach my $x (sort {lc($a) cmp lc($b)} keys %INC) {
print "# [$x] = [", $INC{$x} || '', "]\n";
}
ok 1;
Class-ISA-0.36/t/01_old_junk.t 0000644 0000000 0000000 00000001334 11464543532 0015664 0 ustar 00root root 0000000 0000000 BEGIN {
chdir 't' if -d 't';
#@INC = '../lib';
}
# Time-stamp: "2004-12-29 19:59:33 AST"
BEGIN { $| = 1; print "1..2\n"; }
END {print "not ok 1\n" unless $loaded;}
use Class::ISA;
$loaded = 1;
print "ok 1\n";
@Food::Fishstick::ISA = qw(Food::Fish Life::Fungus Chemicals);
@Food::Fish::ISA = qw(Food);
@Food::ISA = qw(Matter);
@Life::Fungus::ISA = qw(Life);
@Chemicals::ISA = qw(Matter);
@Life::ISA = qw(Matter);
@Matter::ISA = qw();
use Class::ISA;
my @path = Class::ISA::super_path('Food::Fishstick');
my $flat_path = join ' ', @path;
print "#Food::Fishstick path is:\n# $flat_path\n";
"Food::Fish Food Matter Life::Fungus Life Chemicals" eq $flat_path ?
"ok 2\n" : "fail 2!\n";