Alter the weaken support a bit

[gitmo/Mouse.git] / lib / Mouse / Util.pm

diff --git a/lib/Mouse/Util.pm b/lib/Mouse/Util.pm
index c8b3c67..625ed4e 100644 (file)
--- a/lib/Mouse/Util.pm
+++ b/lib/Mouse/Util.pm
@@ -6,6 +6,8 @@ use base 'Exporter';
 
 our %dependencies = (
     'Scalar::Util' => {
+
+#       VVVVV   CODE TAKEN FROM SCALAR::UTIL   VVVVV
         'blessed' => do {
             do {
                 no strict 'refs';
@@ -30,8 +32,70 @@ our %dependencies = (
                     : 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' => {
+#       VVVVV   CODE TAKEN FROM MRO::COMPAT   VVVVV
         'get_linear_isa' => {
             loaded     => \&mro::get_linear_isa,
             not_loaded => do {
@@ -56,6 +120,7 @@ our %dependencies = (
                 }
             },
         },
+#       ^^^^^   CODE TAKEN FROM MRO::COMPAT   ^^^^^
     },
 );
 
@@ -89,5 +154,6 @@ for my $module_name (keys %dependencies) {
     }
 }
 
+
 1;