#10168: generalize filterM, mapAndUnzipM, zipWithM, zipWithM_, replicateM, replicateM_ -------------------------------------+------------------------------------- Reporter: strake888 | Owner: Type: bug | Status: closed Priority: normal | Milestone: 8.0.1 Component: Core Libraries | Version: 7.10.1-rc1 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D1324 Wiki Page: | -------------------------------------+------------------------------------- Comment (by dfeuer): I was too tired when I wrote that remark, so I forgot about transformers. `StateT u (ST s)` actually is a perfectly beautiful target for `replicateM_`. With the current definition, that *can* be unboxed, allowing for some serious vector crunching. I think your version should be in the library; I just think it should have a new name. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10168#comment:22 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler