X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FRole%2FTiny.pm;h=f708a163f30b77df2bd75eb0ef7749eb45319217;hb=f1ce2b19568463d3f08961bc91d2459b6695bece;hp=7f8c7fbd763defb2ab603dff74d722adbeecdbe4;hpb=ef2da7113f32425de85dbefe3344b9077c0a0501;p=gitmo%2FRole-Tiny.git diff --git a/lib/Role/Tiny.pm b/lib/Role/Tiny.pm index 7f8c7fb..f708a16 100644 --- a/lib/Role/Tiny.pm +++ b/lib/Role/Tiny.pm @@ -6,7 +6,7 @@ sub _getstash { \%{"$_[0]::"} } use strict; use warnings FATAL => 'all'; -our $VERSION = '1.001002'; # 1.1.2 +our $VERSION = '1.002005'; # 1.2.5 $VERSION = eval $VERSION; our %INFO; @@ -45,7 +45,7 @@ sub 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}::"} }; + my $stash = _getstash($target); # install before/after/around subs foreach my $type (qw(before after around)) { *{_getglob "${target}::${type}"} = sub { @@ -64,9 +64,9 @@ sub import { }; # grab all *non-constant* (stash slot is not a scalarref) subs present # in the symbol table and store their refaddrs (no need to forcibly - # inflate constant subs into real subs) - also add '' to here (this - # is used later) with a map to the coderefs in case of copying or re-use - my @not_methods = ('', map { *$_{CODE}||() } grep !ref($_), values %$stash); + # inflate constant subs into real subs) with a map to the coderefs in + # case of copying or re-use + my @not_methods = (map { *$_{CODE}||() } grep !ref($_), values %$stash); @{$INFO{$target}{not_methods}={}}{@not_methods} = @not_methods; # a role does itself $APPLIED_TO{$target} = { $target => undef }; @@ -86,11 +86,6 @@ sub apply_single_role_to_package { $me->_install_modifiers($to, $info->{modifiers}); - # only add does() method to classes and only if they don't have one - if (not $INFO{$to} and not $to->can('does')) { - *{_getglob "${to}::does"} = \&does_role; - } - # copy our role list into the target's @{$APPLIED_TO{$to}||={}}{keys %{$APPLIED_TO{$role}}} = (); } @@ -108,6 +103,7 @@ sub create_class_with_roles { die "No roles supplied!" unless @roles; + _load_module($superclass); { my %seen; $seen{$_}++ for @roles; @@ -133,6 +129,18 @@ sub create_class_with_roles { require MRO::Compat; } + my %conflicts = %{$me->_composite_info_for(@roles)->{conflicts}}; + if (keys %conflicts) { + my $fail = + join "\n", + map { + "Method name conflict for '$_' between roles " + ."'".join(' and ', sort values %{$conflicts{$_}})."'" + .", cannot apply these simultaneously to an object." + } keys %conflicts; + die $fail; + } + my @composable = map $me->_composable_package_for($_), reverse @roles; *{_getglob("${new_name}::ISA")} = [ @composable, $superclass ]; @@ -144,8 +152,6 @@ sub create_class_with_roles { do { my %h; @h{map @{$_->{requires}||[]}, @info} = (); keys %h } ); - *{_getglob "${new_name}::does"} = \&does_role unless $new_name->can('does'); - @{$APPLIED_TO{$new_name}||={}}{ map keys %{$APPLIED_TO{$_}}, @roles } = (); @@ -176,15 +182,26 @@ sub apply_roles_to_package { } keys %conflicts; die $fail; } - delete $INFO{$to}{methods}; # reset since we're about to add methods - $me->apply_role_to_package($to, $_) for @roles; + + # the if guard here is essential since otherwise we accidentally create + # a $INFO for something that isn't a Role::Tiny (or Moo::Role) because + # autovivification hates us and wants us to die() + if ($INFO{$to}) { + delete $INFO{$to}{methods}; # reset since we're about to add methods + } + + foreach my $role (@roles) { + $me->apply_single_role_to_package($to, $role); + } $APPLIED_TO{$to}{join('|',@roles)} = 1; } sub _composite_info_for { my ($me, @roles) = @_; $COMPOSITE_INFO{join('|', sort @roles)} ||= do { - _load_module($_) for @roles; + foreach my $role (@roles) { + _load_module($role); + } my %methods; foreach my $role (@roles) { my $this_methods = $me->_concrete_methods_of($role); @@ -201,7 +218,11 @@ sub _composable_package_for { return $composed_name if $COMPOSED{role}{$composed_name}; $me->_install_methods($composed_name, $role); my $base_name = $composed_name.'::_BASE'; - *{_getglob("${composed_name}::ISA")} = [ $base_name ]; + # Not using _getglob, since setting @ISA via the typeglob breaks + # inheritance on 5.10.0 if the stash has previously been accessed an + # then a method called on the class (in that order!), which + # ->_install_methods (with the help of ->_install_does) ends up doing. + { no strict 'refs'; @{"${composed_name}::ISA"} = ( $base_name ); } my $modifiers = $INFO{$role}{modifiers}||[]; my @mod_base; foreach my $modified ( @@ -237,16 +258,15 @@ sub _concrete_methods_of { my ($me, $role) = @_; my $info = $INFO{$role}; # grab role symbol table - my $stash = do { no strict 'refs'; \%{"${role}::"}}; + my $stash = _getstash($role); # reverse so our keys become the values (captured coderefs) in case # they got copied or re-used since - my $not_methods = { reverse %{$info->{not_methods}} }; + my $not_methods = { reverse %{$info->{not_methods}||{}} }; $info->{methods} ||= +{ # grab all code entries that aren't in the not_methods list map { my $code = *{$stash->{$_}}{CODE}; - # rely on the '' key we added in import for "no code here" - exists $not_methods->{$code||''} ? () : ($_ => $code) + ( ! $code or exists $not_methods->{$code} ) ? () : ($_ => $code) } grep !ref($stash->{$_}), keys %$stash }; } @@ -265,7 +285,7 @@ sub _install_methods { my $methods = $me->_concrete_methods_of($role); # grab target symbol table - my $stash = do { no strict 'refs'; \%{"${to}::"}}; + my $stash = _getstash($to); # determine already extant methods of target my %has_methods; @@ -278,6 +298,8 @@ sub _install_methods { no warnings 'once'; *{_getglob "${to}::${i}"} = $methods->{$i}; } + + $me->_install_does($to); } sub _install_modifiers { @@ -291,18 +313,58 @@ sub _install_modifiers { } } +my $vcheck_error; + sub _install_single_modifier { my ($me, @args) = @_; + defined($vcheck_error) or $vcheck_error = do { + local $@; + eval { Class::Method::Modifiers->VERSION(1.05); 1 } + ? 0 + : $@ + }; + $vcheck_error and die $vcheck_error; Class::Method::Modifiers::install_modifier(@args); } +my $FALLBACK = sub { 0 }; +sub _install_does { + my ($me, $to) = @_; + + # only add does() method to classes + return if $INFO{$to}; + + # add does() only if they don't have one + *{_getglob "${to}::does"} = \&does_role unless $to->can('does'); + + return if ($to->can('DOES') and $to->can('DOES') != (UNIVERSAL->can('DOES') || 0)); + + my $existing = $to->can('DOES') || $to->can('isa') || $FALLBACK; + my $new_sub = sub { + my ($proto, $role) = @_; + Role::Tiny::does_role($proto, $role) or $proto->$existing($role); + }; + no warnings 'redefine'; + *{_getglob "${to}::DOES"} = $new_sub; +} + sub does_role { my ($proto, $role) = @_; - return exists $APPLIED_TO{ref($proto)||$proto}{$role}; + if ($] >= 5.010) { + require mro; + } else { + require MRO::Compat; + } + foreach my $class (@{mro::get_linear_isa(ref($proto)||$proto)}) { + return 1 if exists $APPLIED_TO{$class}{$role}; + } + return 0; } 1; +=encoding utf-8 + =head1 NAME Role::Tiny - Roles. Like a nouvelle cuisine portion size slice of Moose. @@ -446,7 +508,11 @@ composed into unless that class already has an ->does method, so ... } -will work for classes but to test a role, one must use ::does_role directly +will work for classes but to test a role, one must use ::does_role directly. + +Additionally, Role::Tiny will override the standard Perl C method +for your class. However, if C class in your class' inheritance +heirarchy provides C, then Role::Tiny will not override it. =head1 METHODS @@ -510,6 +576,10 @@ perigrin - Chris Prather (cpan:PERIGRIN) Mithaldu - Christian Walde (cpan:MITHALDU) +ilmari - Dagfinn Ilmari Mannsåker (cpan:ILMARI) + +tobyink - Toby Inkster (cpan:TOBYINK) + =head1 COPYRIGHT Copyright (c) 2010-2012 the Role::Tiny L and L