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Added FAQ about fixing HLint parse error.

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Martin Sosic 2020-07-30 18:13:49 +02:00 committed by Maximilian Wolff
parent 7c3a10c3a1
commit 9d0174bd37
1 changed files with 9 additions and 1 deletions
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@ -46,6 +46,7 @@
- [[#ghc-mod-doesnt-work][=ghc-mod= doesn't work]]
- [[#indentation-doesnt-reset-when-pressing-return-after-an-empty-line][Indentation doesn't reset when pressing return after an empty line]]
- [[#flycheck-displays-hlint-warnings-but-not-errors][Flycheck displays HLint warnings but not errors]]
- [[#hlint-fails-with-parse-error][HLint fails with parse error]]
- [[#i-can-see-highlighted-errors-but-they-dont-appear-in-the-error-list][I can see highlighted errors but they don't appear in the error list]]
- [[#flycheck-doesnt-work][Flycheck doesn't work]]
- [[#flycheck-doesnt-work-with-stack][Flycheck doesn't work with =stack=]]
@ -397,10 +398,12 @@ Flycheck has different Haskell checkers: =haskell-ghc=, =haskell-stack-ghc= and
if it doesn't work, then you can change it with ~SPC e s~.
** HLint
HLint is a linter for Haskell. It doesn't detect errors (as long as it can parse
[[https://github.com/ndmitchell/hlint][HLint]] is a linter for Haskell. It doesn't detect errors (as long as it can parse
the file) but bad coding style and code smell. The HLint checker is called
*after* the flycheck GHC checker.
HLint can be configured via .hlint.yaml.
** ghc-mod
Ghc-mod, when enabled, also does syntax checking. It doesn't highlight errors,
but instead displays an exclamation point in the fringe. You can navigate
@ -511,6 +514,11 @@ following snippet into your =dotspacemacs/user-config= function.
The HLint checker is called *after* the normal flycheck checker, even if the
checker fails. Check the [[#flycheck-doesnt-work][Flycheck doesn't work]] section.
** HLint fails with parse error
If HLint is not correctly configured (e.g. does not load some extensions that you are using in your project) it might fail while parsing the file.
Check [[https://github.com/ndmitchell/hlint][HLint]] docs for more details.
** I can see highlighted errors but they don't appear in the error list
The error list is only set by flycheck. You are probably seeing errors
highlighted by either ghc-mode or haskell-mode. Check the [[#flycheck-doesnt-work][Flycheck doesn't work]]