#15183: Expose the SNat type and the natSing method -------------------------------------+------------------------------------- Reporter: dfeuer | Owner: (none) Type: feature request | Status: new Priority: normal | Milestone: 8.6.1 Component: Core Libraries | Version: 8.2.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by goldfire): This was a design decision. In 2012 or so, Iavor was developing the TypeLits interface simultaneously with my development of singletons. We wanted to have one `Sing`, shared between the TypeLits stuff (built into GHC) and the singletons stuff (external). But the design considerations pulled at each other -- especially because `singletons` could make changes much more quickly than GHC could. So, instead of having built-in singletons and external singletons, it was decided to hide the built-in ones. Maybe now that we have more experience, this decision could be updated... but I still think that introducing any singletons into `base` will start a chain reaction of other feature requests. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15183#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler