#10893: Consistent error message suggestions for using language extensions -------------------------------------+------------------------------------- Reporter: spl | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.11 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Revisions: -------------------------------------+------------------------------------- Old description:
I saw this error today in 7.10.1: {{{ Parse error: naked expression at top level Perhaps you intended to use TemplateHaskell }}} I'm glad it suggests using !TemplateHaskell; however, the suggestion seems incomplete. I did in fact intend to use Template Haskell, but I think this suggestion implies the ''language extension'' though it doesn't explicitly say so. I believe other error message suggestions are more explicit about mentioning language extension, e.g. {{{use -XFlexibleContexts}}}, which refers to the flag. I'm just bringing this issue up to request a consistent error message suggestion format for language extensions that explicitly mentions “language extension” or {{{-X}}}. (It may be that the above message is the only one not doing that; I haven't checked.)
New description: I saw this error today in 7.10.1: {{{ Parse error: naked expression at top level Perhaps you intended to use TemplateHaskell }}} I'm glad it suggests using !TemplateHaskell; however, the suggestion seems incomplete. I did in fact intend to use Template Haskell, but I think this suggestion implies the ''language extension'' though it doesn't explicitly say so. I believe other error message suggestions are more explicit about mentioning language extension, e.g. {{{use -XFlexibleContexts}}}, which refers to the flag. I'm just bringing this issue up to request a consistent error message suggestion format for language extensions that explicitly mentions “language extension” or {{{-X}}}. (It may be that the above message is the only one not doing that; I haven't checked.) -- Comment (by spl): Okay, I see that I missed the memo. The reasoning for removing {{{-X}}} is fine, and I'm glad the messages are consistent. I do think it would be useful to mention (language) extension (as opposed to using another flag) in the message, but the issue is minor and I'm not tied to it. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10893#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler