X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FRole%2FTiny.pm;h=eb4cb0b9bf6da723b6f2c4d11c48ad9a5b55d978;hb=adcb6c3d137e9bf582fb3b1818de995c5146e3c3;hp=447901261b9b6612bbafb9fef8a811f1b25a25ce;hpb=7b8177f835014e871d1c75016272ba320f4cd975;p=gitmo%2FRole-Tiny.git diff --git a/lib/Role/Tiny.pm b/lib/Role/Tiny.pm index 4479012..eb4cb0b 100644 --- a/lib/Role/Tiny.pm +++ b/lib/Role/Tiny.pm @@ -6,38 +6,49 @@ sub _getstash { \%{"$_[0]::"} } 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}||=[]}, [ $type => @_ ]; }; } @@ -53,7 +64,7 @@ sub import { # inflate constant subs into real subs) - also add '' to here (this # is used later) @{$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 }; @@ -103,20 +114,20 @@ sub create_class_with_roles { 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, @@ -147,11 +158,13 @@ sub _composable_package_for { ) { 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; @@ -182,7 +195,7 @@ sub _concrete_methods_of { 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 %$stash }; }; } @@ -206,7 +219,7 @@ sub _install_methods { # determine already extant methods of target my %has_methods; @has_methods{grep - +(_is_scalar_ref($stash->{$_}) || *{$stash->{$_}}{CODE}), + +(ref($stash->{$_}) || *{$stash->{$_}}{CODE}), keys %$stash } = (); @@ -241,7 +254,7 @@ sub does_role { =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 @@ -253,6 +266,8 @@ Role::Tiny - Roles. Like a nouvelle cusine portion size slice of Moose. sub bar { ... } + around baz => sub { ... } + 1; else where @@ -266,8 +281,13 @@ 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. + =head1 DESCRIPTION C is a minimalist role composition tool. @@ -331,7 +351,7 @@ Returns true if class has been composed with role. 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')) { ... } @@ -360,6 +380,11 @@ at a time to allow the code to remain as simple as possible. See L<< Class::Method::Modifiers/before method(s) => sub { ... } >> for full documentation. +Note that since you are not required to use method modifiers, +L is lazily loaded and we do not declare it as +a dependency. If your L role uses modifiers you must depend on +both L and L. + =head2 around around foo => sub { ... }; @@ -367,6 +392,11 @@ documentation. See L<< Class::Method::Modifiers/around method(s) => sub { ... } >> for full documentation. +Note that since you are not required to use method modifiers, +L is lazily loaded and we do not declare it as +a dependency. If your L role uses modifiers you must depend on +both L and L. + =head2 after after foo => sub { ... }; @@ -374,12 +404,53 @@ documentation. 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 is lazily loaded and we do not declare it as +a dependency. If your L role uses modifiers you must depend on +both L and L. + +=head1 SEE ALSO + +L is the attribute-less subset of L; L is +a meta-protocol-less subset of the king of role systems, L. + +If you don't want method modifiers and do want to be forcibly restricted +to a single role application per class, Ovid's L exists. But +Stevan Little (the L author) and I are both still convinced that +he's Doing It Wrong. + +=head1 AUTHOR + +mst - Matt S. Trout (cpan:MSTROUT) + +=head1 CONTRIBUTORS + +dg - David Leadbeater (cpan:DGL) + +frew - Arthur Axel "fREW" Schmidt (cpan:FREW) + +hobbs - Andrew Rodland (cpan:ARODLAND) + +jnap - John Napiorkowski (cpan:JJNAPIORK) + +ribasushi - Peter Rabbitson (cpan:RIBASUSHI) + +chip - Chip Salzenberg (cpan:CHIPS) + +ajgb - Alex J. G. Burzyński (cpan:AJGB) + +doy - Jesse Luehrs (cpan:DOY) + +perigrin - Chris Prather (cpan:PERIGRIN) + +=head1 COPYRIGHT -See L for authors. +Copyright (c) 2010-2012 the Role::Tiny L and L +as listed above. -=head1 COPYRIGHT AND LICENSE +=head1 LICENSE -See L for the copyright and license. +This library is free software and may be distributed under the same terms +as perl itself. =cut