I would suggest treating "a = 1" as a declaration. This is what IHaskell does, and it seems more intuitive than hacky parsing it into a "let a = 1". The implementation should be easy using runDecls from InteractiveEval and parseDeclaration from Parser.y to do the actual parsing.

-- Andrew

On Sat, Aug 22, 2015 at 8:50 AM, Alex Rozenshteyn <rpglover64@gmail.com> wrote:

I'm thinking of working on this ticket (https://ghc.haskell.org/trac/ghc/ticket/7253), so, as per mpickering's suggestion (https://phabricator.haskell.org/chatlog/channel/3/?at=1353572), I'm emailing the list to solicit input.

My first instinct was to treat declarations like "a = 1" in GHCI as equivalent to "let a = 1"; this would be a straightforward matter of parsing. On the other hand, as thoughtpolice comments, let-bound variables are treated subtly differently than top-level bindings, so the proper solution may be more involved.

Comments?

_______________________________________________
ghc-devs mailing list
ghc-devs@haskell.org
http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs