Imported nextalyzer.pl

diff --git a/script/nextalyzer.pl b/script/nextalyzer.pl
new file mode 100755 (executable)
index 0000000..4a32db1
--- /dev/null
+++ b/script/nextalyzer.pl
@@ -0,0 +1,72 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+use Class::ISA;
+
+my $class = $ARGV[0];
+
+die "usage: nextalyzer Some::Class" unless $class;
+
+eval "use $class;";
+
+die "Error using $class: $@" if $@;
+
+my @path = reverse Class::ISA::super_path($class);
+
+my %provided;
+my %overloaded;
+
+my @warnings;
+
+foreach my $super (@path) {
+  my $file = $super;
+  $file =~ s/\:\:/\//g;
+  $file .= '.pm';
+  my $file_path = $INC{$file};
+  die "Couldn't get INC for $file, super $super" unless $file_path;
+  #warn "$super $file $file_path";
+  open IN, '<', $file_path;
+  my $in_sub;
+  my $ws;
+  my $uses_next;
+  my @provides;
+  my @overloads;
+  while (my $line = <IN>) {
+    unless ($in_sub) {
+      ($ws, $in_sub) = ($line =~ /^(\s*)sub (\S+)/);
+      next unless $in_sub;
+    }
+    if ($line =~ /^$ws\}/) {
+      if ($uses_next) {
+        push(@overloads, $in_sub);
+      } else {
+        push(@provides, $in_sub);
+      }
+      undef $in_sub;
+      undef $uses_next;
+      undef $ws;
+      next;
+    }
+    $uses_next++ if ($line =~ /\-\>NEXT/);
+  }
+  close IN;
+  foreach (@overloads) {
+    push(@warnings, "Method $_ overloaded in $class but not yet provided")
+      unless $provided{$_};
+    push(@{$overloaded{$_}}, $super);
+  }
+  $provided{$_} = $super for @provides;
+  print "Class $super:\n";
+  print "Provides: @provides\n";
+  print "Overloads: @overloads\n";
+}
+
+print "\n\n";
+
+print join("\n", @warnings);
+
+foreach my $o (keys %overloaded) {
+  my $pr = $provided{$o} || "**NEVER**";
+  print "Method $o: ".join(' ', reverse @{$overloaded{$o}})." ${pr}\n";
+}