#9183: GHC shouldn't expand constraint synonyms -------------------------------------+------------------------------------ Reporter: Feuerbach | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.8.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Unknown/Multiple Type of failure: None/Unknown | Difficulty: Unknown Test Case: | Blocked By: Blocking: | Related Tickets: -------------------------------------+------------------------------------ Comment (by Feuerbach): Just tested it — doesn't seem to work. {{{ {-# LANGUAGE FlexibleInstances, UndecidableInstances #-} class Show a => MyC a instance Show a => MyC a foo :: MyC a => a -> String foo = show }}} :t foo shows {{{ foo :: Show a => a -> String }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/9183#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler