Vendor unreleased rack-mount 0.6.6.pre dependency

1 files changed, 69 insertions, 0 deletions

diff --git a/actionpack/lib/action_dispatch/vendor/rack-mount-0.6.6.pre/rack/mount/regexp_with_named_groups.rb b/actionpack/lib/action_dispatch/vendor/rack-mount-0.6.6.pre/rack/mount/regexp_with_named_groups.rb
new file mode 100644
index 0000000000..c11292b2a2
--- /dev/null
+++ b/actionpack/lib/action_dispatch/vendor/rack-mount-0.6.6.pre/rack/mount/regexp_with_named_groups.rb
@@ -0,0 +1,69 @@
+module Rack::Mount
+  if Regin.regexp_supports_named_captures?
+    RegexpWithNamedGroups = Regexp
+  else
+    require 'strscan'
+
+    # A wrapper that adds shim named capture support to older
+    # versions of Ruby.
+    #
+    # Because the named capture syntax causes a parse error, an
+    # alternate syntax is used to indicate named captures.
+    #
+    # Ruby 1.9+ named capture syntax:
+    #
+    #   /(?<foo>[a-z]+)/
+    #
+    # Ruby 1.8 shim syntax:
+    #
+    #   /(?:<foo>[a-z]+)/
+    class RegexpWithNamedGroups < Regexp
+      def self.new(regexp) #:nodoc:
+        if regexp.is_a?(RegexpWithNamedGroups)
+          regexp
+        else
+          super
+        end
+      end
+
+      # Wraps Regexp with named capture support.
+      def initialize(regexp)
+        regexp = Regexp.compile(regexp) unless regexp.is_a?(Regexp)
+        source, options = regexp.source, regexp.options
+        @names, scanner = [], StringScanner.new(source)
+
+        while scanner.skip_until(/\(/)
+          if scanner.scan(/\?:<([^>]+)>/)
+            @names << scanner[1]
+          elsif scanner.scan(/\?(i?m?x?\-?i?m?x?)?:/)
+            # ignore noncapture
+          else
+            @names << nil
+          end
+        end
+        source.gsub!(/\?:<([^>]+)>/, '')
+
+        @names = [] unless @names.any?
+        @names.freeze
+
+        super(source, options)
+      end
+
+      def names
+        @names.dup
+      end
+
+      def named_captures
+        named_captures = {}
+        names.each_with_index { |n, i|
+          named_captures[n] = [i+1] if n
+        }
+        named_captures
+      end
+
+      def eql?(other)
+        super && @names.eql?(other.names)
+      end
+    end
+  end
+end