X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?p=gitmo%2FMouse.git;a=blobdiff_plain;f=lib%2FMouse%2FUtil.pm;h=0e4d8652ecd184ba3dcd3e758ec9c822e729f4f4;hp=9f3ecf9eef6a3204718df0d9590b5727e3697d2c;hb=1820fffecb0bd1da64edc16ecde534178b841d14;hpb=6cfa1e5e70616fb102915489c02d8347ffa912fb diff --git a/lib/Mouse/Util.pm b/lib/Mouse/Util.pm index 9f3ecf9..0e4d865 100644 --- a/lib/Mouse/Util.pm +++ b/lib/Mouse/Util.pm @@ -2,21 +2,51 @@ package Mouse::Util; use strict; use warnings; use base qw/Exporter/; + use Carp qw(confess); use B (); our @EXPORT_OK = qw( + find_meta + does_role + resolve_metaclass_alias + apply_all_roles + english_list + load_class is_class_loaded + get_linear_isa - apply_all_roles get_code_info + not_supported + + does meta dump ); our %EXPORT_TAGS = ( all => \@EXPORT_OK, + meta => [qw(does meta dump)], ); +# Moose::Util compatible utilities + +sub find_meta{ + return Mouse::Meta::Module::class_of( $_[0] ); +} + +sub does_role{ + my ($class_or_obj, $role_name) = @_; + + my $meta = Mouse::Meta::Module::class_of($class_or_obj); + + (defined $role_name) + || ($meta || 'Mouse::Meta::Class')->throw_error("You must supply a role name to does()"); + + return defined($meta) && $meta->does_role($role_name); +} + + + BEGIN { my $impl; if ($] >= 5.009_005) { @@ -61,45 +91,44 @@ BEGIN { } { # taken from Sub::Identify - sub get_code_info($) { - my ($coderef) = @_; - ref($coderef) or return; + sub get_code_info($) { + my ($coderef) = @_; + ref($coderef) or return; - my $cv = B::svref_2object($coderef); + my $cv = B::svref_2object($coderef); $cv->isa('B::CV') or return; - my $gv = $cv->GV; - $gv->isa('B::GV') or return; - - return ($gv->STASH->NAME, $gv->NAME); - } + my $gv = $cv->GV; + $gv->isa('B::GV') or return; + + return ($gv->STASH->NAME, $gv->NAME); + } } -# taken from Class/MOP.pm +# taken from Mouse::Util (0.90) { my %cache; sub resolve_metaclass_alias { my ( $type, $metaclass_name, %options ) = @_; - my $cache_key = $type; - return $cache{$cache_key}{$metaclass_name} - if $cache{$cache_key}{$metaclass_name}; + my $cache_key = $type . q{ } . ( $options{trait} ? '-Trait' : '' ); - my $possible_full_name = - 'Mouse::Meta::' - . $type - . '::Custom::' - . $metaclass_name; + return $cache{$cache_key}{$metaclass_name} ||= do{ - my $loaded_class = - load_first_existing_class( $possible_full_name, - $metaclass_name ); + my $possible_full_name = join '::', + 'Mouse::Meta', $type, 'Custom', ($options{trait} ? 'Trait' : ()), $metaclass_name + ; + + my $loaded_class = load_first_existing_class( + $possible_full_name, + $metaclass_name + ); - return $cache{$cache_key}{$metaclass_name} = $loaded_class->can('register_implementation') - ? $loaded_class->register_implementation - : $loaded_class; + ? $loaded_class->register_implementation + : $loaded_class; + }; } } @@ -120,7 +149,6 @@ sub load_first_existing_class { my @classes = @_ or return; - my $found; my %exceptions; for my $class (@classes) { my $e = _try_load_one_class($class); @@ -129,12 +157,11 @@ sub load_first_existing_class { $exceptions{$class} = $e; } else { - $found = $class; - last; + return $class; } } - return $found if $found; + # not found confess join( "\n", map { @@ -180,27 +207,28 @@ sub is_class_loaded { return 0 if ref($class) || !defined($class) || !length($class); - return 1 if exists $is_class_loaded_cache{$class}; + return 1 if $is_class_loaded_cache{$class}; # walk the symbol table tree to avoid autovififying # \*{${main::}{"Foo::"}} == \*main::Foo:: - my $pack = \*::; + my $pack = \%::; foreach my $part (split('::', $class)) { - return 0 unless exists ${$$pack}{"${part}::"}; - $pack = \*{${$$pack}{"${part}::"}}; + my $entry = \$pack->{$part . '::'}; + return 0 if ref($entry) ne 'GLOB'; + $pack = *{$entry}{HASH} or return 0; } # check for $VERSION or @ISA - return ++$is_class_loaded_cache{$class} if exists ${$$pack}{VERSION} - && defined *{${$$pack}{VERSION}}{SCALAR}; - return ++$is_class_loaded_cache{$class} if exists ${$$pack}{ISA} - && defined *{${$$pack}{ISA}}{ARRAY}; + return ++$is_class_loaded_cache{$class} if exists $pack->{VERSION} + && defined *{$pack->{VERSION}}{SCALAR} && defined ${ $pack->{VERSION} }; + return ++$is_class_loaded_cache{$class} if exists $pack->{ISA} + && defined *{$pack->{ISA}}{ARRAY} && @{ $pack->{ISA} } != 0; # check for any method - foreach ( keys %{$$pack} ) { - next if substr($_, -2, 2) eq '::'; - return ++$is_class_loaded_cache{$class} if defined *{${$$pack}{$_}}{CODE}; + foreach my $name( keys %{$pack} ) { + my $entry = \$pack->{$name}; + return ++$is_class_loaded_cache{$class} if ref($entry) ne 'GLOB' || defined *{$entry}{CODE}; } # fail @@ -221,18 +249,12 @@ sub apply_all_roles { } else { push @roles, [ $_[$i] => {} ]; } + my $role_name = $roles[-1][0]; + load_class($role_name); + ( $role_name->can('meta') && $role_name->meta->isa('Mouse::Meta::Role') ) + || $meta->throw_error("You can only consume roles, $role_name(".$role_name->meta.") is not a Mouse role"); } - foreach my $role_spec (@roles) { - Mouse::load_class( $role_spec->[0] ); - } - - ( $_->[0]->can('meta') && $_->[0]->meta->isa('Mouse::Meta::Role') ) - || confess("You can only consume roles, " - . $_->[0] - . " is not a Moose role") - foreach @roles; - if ( scalar @roles == 1 ) { my ( $role, $params ) = @{ $roles[0] }; $role->meta->apply( $meta, ( defined $params ? %$params : () ) ); @@ -243,15 +265,48 @@ sub apply_all_roles { return; } +# taken from Moose::Util 0.90 +sub english_list { + return $_[0] if @_ == 1; + + my @items = sort @_; + + return "$items[0] and $items[1]" if @items == 2; + + my $tail = pop @items; + + return join q{, }, @items, "and $tail"; +} + + +# common utilities + sub not_supported{ my($feature) = @_; $feature ||= ( caller(1) )[3]; # subroutine name - local $Carp::CarpLevel = $Carp::CarpLevel + 2; - Carp::croak("Mouse does not currently support $feature"); + local $Carp::CarpLevel = $Carp::CarpLevel + 1; + Carp::confess("Mouse does not currently support $feature"); +} + +sub meta{ + return Mouse::Meta::Class->initialize($_[0]); } +sub dump { + my($self, $maxdepth) = @_; + + require 'Data/Dumper.pm'; # we don't want to create its namespace + my $dd = Data::Dumper->new([$self]); + $dd->Maxdepth(defined($maxdepth) ? $maxdepth : 2); + $dd->Indent(1); + return $dd->Dump(); +} + +sub does :method; +*does = \&does_role; # alias + 1; __END__ @@ -262,9 +317,59 @@ Mouse::Util - features, with or without their dependencies =head1 IMPLEMENTATIONS FOR -=head2 L +=head2 Moose::Util + +=head3 C + +=head3 C + +=head3 C + +=head3 C + +=head3 C + +=head2 Class::MOP + +=head2 C<< is_class_loaded(ClassName) -> Bool >> + +Returns whether C is actually loaded or not. It uses a heuristic which +involves checking for the existence of C<$VERSION>, C<@ISA>, and any +locally-defined method. + +=head3 C<< load_class(ClassName) >> + +This will load a given C (or die if it's not loadable). +This function can be used in place of tricks like +C or using C. + +=head2 MRO::Compat + +=head3 C + +=head2 Sub::Identify + +=head3 C + +=head1 UTILITIES FOR MOUSE + +=over 4 + +=item * + +C + +=back + +=head1 SEE ALSO + +L + +L + +L -=head3 get_linear_isa +L =cut