use strict;
use warnings FATAL => 'all';
+our $VERSION = '1.000000'; # 1.0.0
+$VERSION = eval $VERSION;
+
our %INFO;
our %APPLIED_TO;
our %COMPOSED;
-# inlined from Moo::_Utils - update that first.
+# Module state workaround totally stolen from Zefram's Module::Runtime.
+
+BEGIN {
+ *_WORK_AROUND_BROKEN_MODULE_STATE = "$]" < 5.009 ? sub(){1} : sub(){0};
+}
+
+sub Role::Tiny::__GUARD__::DESTROY {
+ delete $INC{$_[0]->[0]} if @{$_[0]};
+}
sub _load_module {
(my $proto = $_[0]) =~ s/::/\//g;
- return 1 if $INC{"${proto}.pm"};
+ $proto .= '.pm';
+ return 1 if $INC{$proto};
# can't just ->can('can') because a sub-package Foo::Bar::Baz
# creates a 'Baz::' key in Foo::Bar's symbol table
return 1 if grep !/::$/, keys %{_getstash($_[0])||{}};
- { local $@; require "${proto}.pm"; }
+ my $guard = _WORK_AROUND_BROKEN_MODULE_STATE
+ && bless([ $proto ], 'Role::Tiny::__GUARD__');
+ require $proto;
+ pop @$guard if _WORK_AROUND_BROKEN_MODULE_STATE;
return 1;
}
-{ # \[] is REF, not SCALAR. \v1 is VSTRING (thanks to doy for that one)
- my %reftypes = map +($_ => 1), qw(SCALAR REF VSTRING);
- sub _is_scalar_ref { $reftypes{ref($_[0])} }
-}
-
sub import {
my $target = caller;
my $me = shift;
- strictures->import;
+ strict->import;
+ warnings->import(FATAL => 'all');
return if $INFO{$target}; # already exported into this package
# get symbol table reference
my $stash = do { no strict 'refs'; \%{"${target}::"} };
# install before/after/around subs
foreach my $type (qw(before after around)) {
*{_getglob "${target}::${type}"} = sub {
- { local $@; require Class::Method::Modifiers; }
+ require Class::Method::Modifiers;
push @{$INFO{$target}{modifiers}||=[]}, [ $type => @_ ];
};
}
# inflate constant subs into real subs) - also add '' to here (this
# is used later)
@{$INFO{$target}{not_methods}={}}{
- '', map { *$_{CODE}||() } grep !_is_scalar_ref($_), values %$stash
+ '', map { *$_{CODE}||() } grep !ref($_), values %$stash
} = ();
# a role does itself
$APPLIED_TO{$target} = { $target => undef };
foreach my $role (@roles) {
_load_module($role);
- die "${role} is not a Role::Tiny" unless my $info = $INFO{$role};
+ die "${role} is not a Role::Tiny" unless $INFO{$role};
}
if ($] >= 5.010) {
- { local $@; require mro; }
+ require mro;
} else {
- { local $@; require MRO::Compat; }
+ require MRO::Compat;
}
my @composable = map $me->_composable_package_for($_), reverse @roles;
*{_getglob("${new_name}::ISA")} = [ @composable, $superclass ];
- my @info = map +($INFO{$_} ? $INFO{$_} : ()), @roles;
+ my @info = map $INFO{$_}, @roles;
$me->_check_requires(
$new_name, $compose_name,
) {
push @mod_base, "sub ${modified} { shift->next::method(\@_) }";
}
+ my $e;
{
local $@;
eval(my $code = join "\n", "package ${base_name};", @mod_base);
- die "Evaling failed: $@\nTrying to eval:\n${code}" if $@;
+ $e = "Evaling failed: $@\nTrying to eval:\n${code}" if $@;
}
+ die $e if $e;
$me->_install_modifiers($composed_name, $modifiers);
$COMPOSED{role}{$composed_name} = 1;
return $composed_name;
my $code = *{$stash->{$_}}{CODE};
# rely on the '' key we added in import for "no code here"
exists $not_methods->{$code||''} ? () : ($_ => $code)
- } grep !_is_scalar_ref($stash->{$_}), keys %$stash
+ } grep !ref($stash->{$_}), keys %$stash
};
};
}
# determine already extant methods of target
my %has_methods;
@has_methods{grep
- +(_is_scalar_ref($stash->{$_}) || *{$stash->{$_}}{CODE}),
+ +(ref($stash->{$_}) || *{$stash->{$_}}{CODE}),
keys %$stash
} = ();
=head1 NAME
-Role::Tiny - Roles. Like a nouvelle cusine portion size slice of Moose.
+Role::Tiny - Roles. Like a nouvelle cuisine portion size slice of Moose.
=head1 SYNOPSIS
sub bar { ... }
+ around baz => sub { ... }
+
1;
else where
sub foo { ... }
+ # baz is wrapped in the around modifier by Class::Method::Modifiers
+ sub baz { ... }
+
1;
+If you wanted attributes as well, look at L<Moo::Role>.
+
=head1 DESCRIPTION
C<Role::Tiny> is a minimalist role composition tool.
This subroutine is also installed as ->does on any class a Role::Tiny is
composed into unless that class already has an ->does method, so
- if ($foo->does_role('Some::Role')) {
+ if ($foo->does('Some::Role')) {
...
}
See L<< Class::Method::Modifiers/before method(s) => sub { ... } >> for full
documentation.
+Note that since you are not required to use method modifiers,
+L<Class::Method::Modifiers> is lazily loaded and we do not declare it as
+a dependency. If your L<Role::Tiny> role uses modifiers you must depend on
+both L<Class::Method::Modifiers> and L<Role::Tiny>.
+
=head2 around
around foo => sub { ... };
See L<< Class::Method::Modifiers/around method(s) => sub { ... } >> for full
documentation.
+Note that since you are not required to use method modifiers,
+L<Class::Method::Modifiers> is lazily loaded and we do not declare it as
+a dependency. If your L<Role::Tiny> role uses modifiers you must depend on
+both L<Class::Method::Modifiers> and L<Role::Tiny>.
+
=head2 after
after foo => sub { ... };
See L<< Class::Method::Modifiers/after method(s) => sub { ... } >> for full
documentation.
-=head1 AUTHORS
+Note that since you are not required to use method modifiers,
+L<Class::Method::Modifiers> is lazily loaded and we do not declare it as
+a dependency. If your L<Role::Tiny> role uses modifiers you must depend on
+both L<Class::Method::Modifiers> and L<Role::Tiny>.
+
+=head1 SEE ALSO
+
+L<Role::Tiny> is the attribute-less subset of L<Moo::Role>; L<Moo::Role> is
+a meta-protocol-less subset of the king of role systems, L<Moose::Role>.
+
+If you don't want method modifiers and do want to be forcibly restricted
+to a single role application per class, Ovid's L<Role::Basic> exists. But
+Stevan Little (the L<Moose> author) and I are both still convinced that
+he's Doing It Wrong.
+
+=head1 AUTHOR
+
+mst - Matt S. Trout (cpan:MSTROUT) <mst@shadowcat.co.uk>
+
+=head1 CONTRIBUTORS
+
+dg - David Leadbeater (cpan:DGL) <dgl@dgl.cx>
+
+frew - Arthur Axel "fREW" Schmidt (cpan:FREW) <frioux@gmail.com>
+
+hobbs - Andrew Rodland (cpan:ARODLAND) <arodland@cpan.org>
+
+jnap - John Napiorkowski (cpan:JJNAPIORK) <jjn1056@yahoo.com>
+
+ribasushi - Peter Rabbitson (cpan:RIBASUSHI) <ribasushi@cpan.org>
+
+chip - Chip Salzenberg (cpan:CHIPS) <chip@pobox.com>
+
+ajgb - Alex J. G. Burzyński (cpan:AJGB) <ajgb@cpan.org>
+
+doy - Jesse Luehrs (cpan:DOY) <doy at tozt dot net>
+
+perigrin - Chris Prather (cpan:PERIGRIN) <chris@prather.org>
+
+=head1 COPYRIGHT
-See L<Moo> for authors.
+Copyright (c) 2010-2012 the Role::Tiny L</AUTHOR> and L</CONTRIBUTORS>
+as listed above.
-=head1 COPYRIGHT AND LICENSE
+=head1 LICENSE
-See L<Moo> for the copyright and license.
+This library is free software and may be distributed under the same terms
+as perl itself.
=cut
projects / gitmo/Role-Tiny.git / blobdiff