X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FMouse%2FUtil.pm;h=4c194fda6bece9516da73b413fe449173c24ab28;hb=eae8075956ba01581ea7488b4ddb2506db1111da;hp=9fb77ae99283b294aaeb72b30b9f8e86ef8b0d4e;hpb=58fe9fb7641a3bb817b773339bc1b81a5a373e62;p=gitmo%2FMouse.git diff --git a/lib/Mouse/Util.pm b/lib/Mouse/Util.pm index 9fb77ae..4c194fd 100644 --- a/lib/Mouse/Util.pm +++ b/lib/Mouse/Util.pm @@ -2,13 +2,99 @@ package Mouse::Util; use strict; use warnings; -use base 'Exporter'; +use Exporter 'import'; +use Carp; -our %dependencies = ( - 'Scalar::Util' => { - 'blessed' => do { - do { +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 { + if ($Mouse::PurePerl) { + _install_pp_func(); + } else { + # If we're running under XS, we can provide + # blessed + # looks_like_number + # reftype + # weaken + # other functions need to be loaded from our respective sources + + if (defined &Scalar::Util::openhandle) { + *openhandle = \&Scalar::Util::openhandle; + } else { + # XXX - room for improvement + *openhandle = sub { + local($@, $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 + }; + } + + if (defined &mro::get_linear_isa) { + *get_linear_isa = \&mro::get_linear_isa; + } else { + # this recurses so it isn't pretty + my $code; + *get_linear_isa = $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; + }; + } + } +} + +sub _install_pp_func { + my %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]); @@ -21,84 +107,179 @@ our %dependencies = ( # but not XS return $ref eq 'GLOB' ? undef : $ref; }; - }; - sub { + sub { + local($@, $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__}, $SIG{__WARN__}); - length(ref($_[0])) - ? eval { $_[0]->a_sub_not_likely_to_be_here } - : undef; + 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 }, - }, - 'looks_like_number' => sub { - local $_ = shift; + 'openhandle' => sub { + my $fh = shift; + my $rt = reftype($fh) || ''; + + return defined(fileno($fh)) ? $fh : undef + if $rt eq 'IO'; - # checks from perlfaq4 - return 0 if !defined($_) 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); + if (reftype(\$fh) eq 'GLOB') { # handle openhandle(*DATA) + $fh = \(my $tmp=$fh); + } + elsif ($rt ne 'GLOB') { + return undef; + } - 0; + (tied(*$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' => { - '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; + '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; } - return \@lin; - } + }, }, +# ^^^^^ CODE TAKEN FROM MRO::COMPAT ^^^^^ }, - }, -); + ); -our @EXPORT_OK = map { keys %$_ } values %dependencies; + my %loaded; + for my $module_name (keys %dependencies) { + my $loaded = do { + local $SIG{__DIE__} = 'DEFAULT'; + eval "require $module_name; 1"; + }; -for my $module_name (keys %dependencies) { - (my $file = "$module_name.pm") =~ s{::}{/}g; + $loaded{$module_name} = $loaded; - my $loaded = do { - local $SIG{__DIE__} = 'DEFAULT'; - eval "require '$file'; 1"; - }; + for my $method_name (keys %{ $dependencies{ $module_name } }) { + my $producer = $dependencies{$module_name}{$method_name}; + my $implementation; - for my $method_name (keys %{ $dependencies{ $module_name } }) { - my $producer = $dependencies{$module_name}{$method_name}; - my $implementation; + if (ref($producer) eq 'HASH') { + $implementation = $loaded + ? $producer->{loaded} + : $producer->{not_loaded}; + } + else { + $implementation = $loaded + ? $module_name->can($method_name) + : $producer; + } - if (ref($producer) eq 'HASH') { - $implementation = $loaded - ? $producer->{loaded} - : $producer->{not_loaded}; + no strict 'refs'; + *{ __PACKAGE__ . '::' . $method_name } = $implementation; } - else { - $implementation = $loaded - ? $module_name->can($method_name) - : $producer; - } - - no strict 'refs'; - *{ __PACKAGE__ . '::' . $method_name } = $implementation; } } +sub apply_all_roles { + my $meta = Mouse::Meta::Class->initialize(shift); + my $role = shift; + confess "Mouse::Util only supports 'apply_all_roles' on individual roles at a time" if @_; + + Mouse::load_class($role); + $role->meta->apply($meta); +} + 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 +