X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?p=gitmo%2FMouse.git;a=blobdiff_plain;f=lib%2FMouse%2FUtil.pm;h=ff39422f74aa334df4cb293b4ef2d9b8a9e673c0;hp=a0bf46335e8b17c0966250f627d440b05772b545;hb=3a63a2e7ef8fbac5f61eab04baecbf5d19374b83;hpb=7fe1b68fc791837235aa8918bddf253998c93a7a diff --git a/lib/Mouse/Util.pm b/lib/Mouse/Util.pm index a0bf463..ff39422 100644 --- a/lib/Mouse/Util.pm +++ b/lib/Mouse/Util.pm @@ -1,154 +1,219 @@ -#!/usr/bin/env perl package Mouse::Util; use strict; use warnings; -use base 'Exporter'; - -our %dependencies = ( - 'Scalar::Util' => { - -# VVVVV CODE TAKEN FROM SCALAR::UTIL VVVVV - 'blessed' => do { - *UNIVERSAL::a_sub_not_likely_to_be_here = sub { - my $ref = ref($_[0]); - - # deviation from Scalar::Util - # XS returns undef, PP returns GLOB. - # let's make that more consistent by having PP return - # undef if it's a GLOB. :/ - - # \*STDOUT would be allowed as an object in PP blessed - # but not XS - return $ref eq 'GLOB' ? undef : $ref; - }; +use base qw/Exporter/; +use Carp qw(confess); +use B (); + +our @EXPORT_OK = qw( + get_linear_isa + apply_all_roles + version + authority + identifier + get_code_info +); +our %EXPORT_TAGS = ( + all => \@EXPORT_OK, +); - sub { - local($@, $SIG{__DIE__}, $SIG{__WARN__}); - length(ref($_[0])) - ? eval { $_[0]->a_sub_not_likely_to_be_here } - : undef; - }, - }, - 'looks_like_number' => sub { - local $_ = shift; - - # checks from perlfaq4 - return 0 if !defined($_) or ref($_); - return 1 if (/^[+-]?\d+$/); # is a +/- integer - return 1 if (/^([+-]?)(?=\d|\.\d)\d*(\.\d*)?([Ee]([+-]?\d+))?$/); # a C float - return 1 if ($] >= 5.008 and /^(Inf(inity)?|NaN)$/i) or ($] >= 5.006001 and /^Inf$/i); - - 0; - }, - 'reftype' => sub { - local($@, $SIG{__DIE__}, $SIG{__WARN__}); - my $r = shift; - my $t; - - length($t = ref($r)) or return undef; - - # This eval will fail if the reference is not blessed - eval { $r->a_sub_not_likely_to_be_here; 1 } - ? do { - $t = eval { - # we have a GLOB or an IO. Stringify a GLOB gives it's name - my $q = *$r; - $q =~ /^\*/ ? "GLOB" : "IO"; - } - or do { - # OK, if we don't have a GLOB what parts of - # a glob will it populate. - # NOTE: A glob always has a SCALAR - local *glob = $r; - defined *glob{ARRAY} && "ARRAY" - or defined *glob{HASH} && "HASH" - or defined *glob{CODE} && "CODE" - or length(ref(${$r})) ? "REF" : "SCALAR"; - } - } - : $t - }, - 'openhandle' => sub { - my $fh = shift; - my $rt = reftype($fh) || ''; - - return defined(fileno($fh)) ? $fh : undef - if $rt eq 'IO'; - - if (reftype(\$fh) eq 'GLOB') { # handle openhandle(*DATA) - $fh = \(my $tmp=$fh); - } - elsif ($rt ne 'GLOB') { - return undef; - } - - (tied(*$fh) or defined(fileno($fh))) - ? $fh : undef; - }, - weaken => { - loaded => \&Scalar::Util::weaken, - not_loaded => sub { die "Scalar::Util required for weak reference support" }, - }, -# ^^^^^ CODE TAKEN FROM SCALAR::UTIL ^^^^^ - }, - 'MRO::Compat' => { +BEGIN { + my $impl; + if ($] >= 5.009_005) { + require mro; + $impl = \&mro::get_linear_isa; + } else { + my $e = do { + local $@; + eval { require MRO::Compat }; + $@; + }; + if (!$e) { + $impl = \&mro::get_linear_isa; + } else { # VVVVV CODE TAKEN FROM MRO::COMPAT VVVVV - 'get_linear_isa' => { - loaded => \&mro::get_linear_isa, - not_loaded => do { - # this recurses so it isn't pretty - my $code; - $code = sub { - no strict 'refs'; - - my $classname = shift; - - my @lin = ($classname); - my %stored; - foreach my $parent (@{"$classname\::ISA"}) { - my $plin = $code->($parent); - foreach (@$plin) { - next if exists $stored{$_}; - push(@lin, $_); - $stored{$_} = 1; - } + my $_get_linear_isa_dfs; # this recurses so it isn't pretty + $_get_linear_isa_dfs = sub { + no strict 'refs'; + + my $classname = shift; + + my @lin = ($classname); + my %stored; + foreach my $parent (@{"$classname\::ISA"}) { + my $plin = $_get_linear_isa_dfs->($parent); + foreach my $p(@$plin) { + next if exists $stored{$p}; + push(@lin, $p); + $stored{$p} = 1; } - return \@lin; } - }, - }, + return \@lin; + }; # ^^^^^ CODE TAKEN FROM MRO::COMPAT ^^^^^ - }, -); + $impl = $_get_linear_isa_dfs; + } + } + + no strict 'refs'; + *{ __PACKAGE__ . '::get_linear_isa'} = $impl; +} -our @EXPORT_OK = map { keys %$_ } values %dependencies; +{ # taken from Sub::Identify + sub get_code_info($) { + my ($coderef) = @_; + ref($coderef) or return; + my $cv = B::svref_2object($coderef); + $cv->isa('B::CV') or return; + + my $gv = $cv->GV; + # bail out if GV is undefined + $gv->isa('B::SPECIAL') and return; + + return ($gv->STASH->NAME, $gv->NAME); + } +} -for my $module_name (keys %dependencies) { - (my $file = "$module_name.pm") =~ s{::}{/}g; +{ # adapted from Class::MOP::Module + + sub version { no strict 'refs'; ${shift->name.'::VERSION'} } + sub authority { no strict 'refs'; ${shift->name.'::AUTHORITY'} } + sub identifier { + my $self = shift; + join '-' => ( + $self->name, + ($self->version || ()), + ($self->authority || ()), + ); + } +} - my $loaded = do { - local $SIG{__DIE__} = 'DEFAULT'; - eval "require '$file'; 1"; - }; +# taken from Class/MOP.pm +{ + 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 $possible_full_name = + 'Mouse::Meta::' + . $type + . '::Custom::' + . $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; + } +} + +# taken from Class/MOP.pm +sub _is_valid_class_name { + my $class = shift; + + return 0 if ref($class); + return 0 unless defined($class); + return 0 unless length($class); + + return 1 if $class =~ /^\w+(?:::\w+)*$/; + + return 0; +} + +# taken from Class/MOP.pm +sub load_first_existing_class { + my @classes = @_ + or return; + + foreach my $class (@classes) { + unless ( _is_valid_class_name($class) ) { + my $display = defined($class) ? $class : 'undef'; + confess "Invalid class name ($display)"; + } + } - for my $method_name (keys %{ $dependencies{ $module_name } }) { - my $producer = $dependencies{$module_name}{$method_name}; - my $implementation; + my $found; + my %exceptions; + for my $class (@classes) { + my $e = _try_load_one_class($class); - if (ref($producer) eq 'HASH') { - $implementation = $loaded - ? $producer->{loaded} - : $producer->{not_loaded}; + if ($e) { + $exceptions{$class} = $e; } else { - $implementation = $loaded - ? $module_name->can($method_name) - : $producer; + $found = $class; + last; + } + } + return $found if $found; + + confess join( + "\n", + map { + sprintf( "Could not load class (%s) because : %s", + $_, $exceptions{$_} ) + } @classes + ); +} + +# taken from Class/MOP.pm +sub _try_load_one_class { + my $class = shift; + + return if Mouse::is_class_loaded($class); + + my $file = $class . '.pm'; + $file =~ s{::}{/}g; + + return do { + local $@; + eval { require($file) }; + $@; + }; +} + +sub apply_all_roles { + my $meta = Mouse::Meta::Class->initialize(shift); + + my @roles; + + # Basis of Data::OptList + my $max = scalar(@_); + for (my $i = 0; $i < $max ; $i++) { + if ($i + 1 < $max && ref($_[$i + 1])) { + push @roles, [ $_[$i++] => $_[$i] ]; + } else { + push @roles, [ $_[$i] => {} ]; } + } + + 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; - no strict 'refs'; - *{ __PACKAGE__ . '::' . $method_name } = $implementation; + if ( scalar @roles == 1 ) { + my ( $role, $params ) = @{ $roles[0] }; + $role->meta->apply( $meta, ( defined $params ? %$params : () ) ); } + else { + Mouse::Meta::Role->combine_apply($meta, @roles); + } + } 1; @@ -165,20 +230,5 @@ Mouse::Util - features, with or without their dependencies =head3 get_linear_isa -=head2 L - -=head3 blessed - -=head3 looks_like_number - -=head3 reftype - -=head3 openhandle - -=head3 weaken - -C I be implemented in XS. If the user tries to use C -without L, an error is thrown. - =cut