got rid of PurePerl in classnames, fixed up a few other things, possible alpha releas...

[gitmo/Class-C3.git] / lib / Class / C3 / next.pm

diff --git a/lib/Class/C3/next.pm b/lib/Class/C3/next.pm
new file mode 100644 (file)
index 0000000..5f36599
--- /dev/null
+++ b/lib/Class/C3/next.pm
@@ -0,0 +1,71 @@
+package  # hide me from PAUSE
+    next; 
+
+use strict;
+use warnings;
+
+use Scalar::Util 'blessed';
+
+our $VERSION = '0.06';
+
+our %METHOD_CACHE;
+
+sub method {
+    my $self     = $_[0];
+    my $class    = blessed($self) || $self;
+    my $indirect = caller() =~ /^(?:next|maybe::next)$/;
+    my $level = $indirect ? 2 : 1;
+     
+    my ($method_caller, $label, @label);
+    while ($method_caller = (caller($level++))[3]) {
+      @label = (split '::', $method_caller);
+      $label = pop @label;
+      last unless
+        $label eq '(eval)' ||
+        $label eq '__ANON__';
+    }
+
+    my $method;
+
+    my $caller   = join '::' => @label;    
+    
+    $method = $METHOD_CACHE{"$class|$caller|$label"} ||= do {
+        
+        my @MRO = Class::C3::calculateMRO($class);
+        
+        my $current;
+        while ($current = shift @MRO) {
+            last if $caller eq $current;
+        }
+        
+        no strict 'refs';
+        my $found;
+        foreach my $class (@MRO) {
+            next if (defined $Class::C3::MRO{$class} && 
+                     defined $Class::C3::MRO{$class}{methods}{$label});          
+            last if (defined ($found = *{$class . '::' . $label}{CODE}));
+        }
+    
+        $found;
+    };
+
+    return $method if $indirect;
+
+    die "No next::method '$label' found for $self" if !$method;
+
+    goto &{$method};
+}
+
+sub can { method($_[0]) }
+
+package  # hide me from PAUSE
+    maybe::next; 
+
+use strict;
+use warnings;
+
+our $VERSION = '0.02';
+
+sub method { (next::method($_[0]) || return)->(@_) }
+
+1;