Added support for Regexp

Used to work on 3.6
See e2775e2

lib/slop/types.rb

@@ -61,6 +61,13 @@ def limit
     end
   end
 
+  # Cast the option argument to a Regexp.
+  class RegexpOption < Option
+    def call(value)
+      Regexp.new(value)
+    end
+  end
+
   # An option that discards the return value, inherits from Bool
   # since it does not expect an argument.
   class NullOption < BoolOption

test/types_test.rb

@@ -100,3 +100,16 @@
     assert_equal({}, @result.to_hash)
   end
 end
+
+describe Slop::RegexpOption do
+  before do
+    @options       = Slop::Options.new
+    @exclude       = @options.regexp "--exclude"
+    @exclude_value = "redirect|news"
+    @result        = @options.parse %W(--exclude #{@exclude_value})
+  end
+
+  it "returns the value as a Regexp" do
+    assert_equal Regexp.new(@exclude_value), @result[:exclude]
+  end
+end