#15009: Float equalities past local equalities -------------------------------------+------------------------------------- Reporter: goldfire | Owner: (none) Type: feature request | Status: closed Priority: normal | Milestone: 8.4.3 Component: Compiler | Version: 8.2.2 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: gadt/T15009 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by nfrisby): I've worked through some interesting examples and distilled them into a first draft rule. CTRL+F for "Rule 20181104" on wiki:FloatMoreEqs2018. The page has dated entries, but today's should supersede all the older ones. I'm traveling on vacation for a couple weeks, so that will certainly derail me for a while. Today's entry was an effort to have something useful to come back to, but it has a couple TODOs. I think the first (Example 5) is a matter of finding the right presentation, while the second (Does RHS of {{{w}}} matter?) is something I just haven't thought much about yet. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15009#comment:20 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler