X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FMouse%2FUtil.pm;h=e080bf4c76de2e2057c407fafd5800ecd7098389;hb=2131374167521ba8734014e5f8b8d439c5d68cba;hp=476075d04556f53f88468ea379456867ac7e674e;hpb=8dd9385f2b685548f1a3c2b9ffe90cff4e19b437;p=gitmo%2FMouse.git

diff --git a/lib/Mouse/Util.pm b/lib/Mouse/Util.pm
index 476075d..e080bf4 100644
--- a/lib/Mouse/Util.pm
+++ b/lib/Mouse/Util.pm
@@ -2,13 +2,86 @@
 package Mouse::Util;
 use strict;
 use warnings;
-use base 'Exporter';
+use Exporter 'import';
 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' => {
+    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 || eval { require Scalar::Util; 1 }) {
+            *openhandle = \&Scalar::Util::openhandle;
+        } else {
+            # XXX - room for improvement
+            *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;
+            };
+        }
+
+        if (defined &mro::get_linear_isa || eval { require MRO::Compat; 1; }) {
+            *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 {
@@ -123,13 +196,7 @@ BEGIN {
         },
     );
 
-    our %loaded;
-
-    our @EXPORT_OK = map { keys %$_ } values %dependencies;
-    our %EXPORT_TAGS = (
-        all  => \@EXPORT_OK,
-    );
-
+    my %loaded;
     for my $module_name (keys %dependencies) {
         my $loaded = do {
             local $SIG{__DIE__} = 'DEFAULT';