Make distance Maybe Real (Nothing for exact results)

Cloogle/API.dcl

@@ -64,7 +64,7 @@ from Text.GenJSON import generic JSONEncode, generic JSONDecode, :: JSONNode
 	, dcl_line      :: Maybe Int    //* The line in the definition module of this entry
 	, icl_line      :: Maybe Int    //* The line in the implementation module of this entry
 	, name          :: String       //* The name of the entry
-	, distance      :: Real         //* A distancy measure, lower is more relevant
+	, distance      :: Maybe Real   //* A distancy measure, lower is more relevant
 	, builtin       :: Maybe Bool   //* Whether this is a builtin function
 	, documentation :: Maybe String //* The CleanDoc description for this result
 	, langrep_documentation :: Maybe [CleanLangReportLocation] //* Documentation in the Clean language report

Cloogle/API.icl

@@ -13,6 +13,7 @@ import Data.Error
 from Data.Func import $
 import Data.Functor
 import Data.Maybe
+import Data.Maybe.Ord
 from Text import class Text(join,split,trim), instance Text String,
 	instance + String, <+
 import Text.GenJSON