X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?p=gitmo%2FMouse.git;a=blobdiff_plain;f=lib%2FMouse%2FUtil.pm;h=e24db21de3e117c571322198ca3bade935c905c6;hp=cc78ccfa97c7c6e001a0a2bd91d8211ed86c124d;hb=74f2f839994288ca48292d561c9dc2d822deae39;hpb=4093c85947564bfd87d50b401b7f5c1f488abebe diff --git a/lib/Mouse/Util.pm b/lib/Mouse/Util.pm index cc78ccf..e24db21 100644 --- a/lib/Mouse/Util.pm +++ b/lib/Mouse/Util.pm @@ -2,66 +2,247 @@ package Mouse::Util; use strict; use warnings; -use base 'Exporter'; - -our %dependencies = ( - 'MRO::Compat' => { - '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; - } +use base qw/Exporter/; +use Carp; + +our @EXPORT_OK = qw( + blessed + get_linear_isa + looks_like_number + openhandle + reftype + weaken +); +our %EXPORT_TAGS = ( + all => \@EXPORT_OK, +); + +# We only have to do this nastiness if we haven't loaded XS version of +# Mouse.pm, so check if we're running under PurePerl or not +BEGIN { + 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 : $ref; + }; + + sub { + local($@, $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"; } - return \@lin; + 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' => { +# 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; + } + } + return \@lin; + } + }, + }, +# ^^^^^ CODE TAKEN FROM MRO::COMPAT ^^^^^ + }, + ); -our @EXPORT_OK = map { keys %$_ } values %dependencies; + our %loaded; -for my $module_name (keys %dependencies) { - (my $file = "$module_name.pm") =~ s{::}{/}g; + our @EXPORT_OK = map { keys %$_ } values %dependencies; + our %EXPORT_TAGS = ( + all => \@EXPORT_OK, + test => [qw/throws_ok lives_ok dies_ok/], + ); - my $loaded = do { - local $SIG{__DIE__} = 'DEFAULT'; - eval "require '$file'; 1"; - }; + for my $module (keys %dependencies) { + my ($module_name, $version) = split ' ', $module; - for my $method_name (keys %{ $dependencies{ $module_name } }) { - my $producer = $dependencies{$module_name}{$method_name}; - my $implementation; + my $loaded = do { + local $SIG{__DIE__} = 'DEFAULT'; + eval "use $module (); 1"; + }; - if (ref($producer) eq 'HASH') { - $implementation = $loaded - ? $producer->{loaded} - : $producer->{not_loaded}; + $loaded{$module_name} = $loaded; + + for my $method_name (keys %{ $dependencies{ $module } }) { + my $producer = $dependencies{$module}{$method_name}; + my $implementation; + + if (ref($producer) eq 'HASH') { + $implementation = $loaded + ? $producer->{loaded} + : $producer->{not_loaded}; + } + else { + $implementation = $loaded + ? $module_name->can($method_name) + : $producer; + } + + no strict 'refs'; + *{ __PACKAGE__ . '::' . $method_name } = $implementation; } - else { - $implementation = $loaded - ? $module_name->can($method_name) - : $producer; + } +} + +sub apply_all_roles { + my $meta = Mouse::Meta::Class->initialize(shift); + + my @roles; + 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] => {} ]; } + } - no strict 'refs'; - *{ __PACKAGE__ . '::' . $method_name } = $implementation; + foreach my $role_spec (@roles) { + Mouse::load_class( $role_spec->[0] ); } + + ( $_->[0]->can('meta') && $_->[0]->meta->isa('Mouse::Meta::Role') ) + || croak("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 : () ) ); + } + else { + Mouse::Meta::Role->combine_apply($meta, @roles); + } + } 1; +__END__ + +=head1 NAME + +Mouse::Util - features, with or without their dependencies + +=head1 IMPLEMENTATIONS FOR + +=head2 L + +=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. + +=head2 Test::Exception + +=head3 throws_ok + +=head3 lives_ok + +=cut +