#11418: Suggest correct spelling when module is not found because of typo -------------------------------------+------------------------------------- Reporter: syd | Owner: Type: feature request | Status: new Priority: lowest | Milestone: Component: Compiler | Version: 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 syd): Replying to [comment:16 thomie]:
* Would ghc scan subdirectories as well (recursively?), when creating
the map? It would have to, I think. The idea is to have a comprehensive mapping of all the (non-package) modules that are available for imports.
* Would ghc persist this map to disk? (so it could be used on the next `ghc --make` run) No. Between runs of `ghc --make` the user may want to add new modules or move modules and that would invalidate this map.
* You mentioned a trade-off before. What would the other side of the trade-off look like? If you mean the 'trade-off' in comment 9, that is no longer applicable.
What we are trading off here is: Loss: - Cost of scanning the entire directory. Gain: - Comprehensive mapping of modules that can be imported. - No file-system calls to find modules while resolving the imports. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11418#comment:17 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler