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| author | David Luposchainsky <dluposchainsky@gmail.com> | 2016-04-17 14:41:33 +0200 |
|---|---|---|
| committer | Ben Gamari <ben@smart-cactus.org> | 2016-04-17 14:42:15 +0200 |
| commit | 7005b9f7b0f4db0c0401156557bd4988d0efd569 (patch) | |
| tree | 5972d7eba8f412e4b5626d80cf8819f7944f7841 /docs/users_guide/using-optimisation.rst | |
| parent | 07dc330736103eee4b94607ef488b3578155f82b (diff) | |
| download | haskell-7005b9f7b0f4db0c0401156557bd4988d0efd569.tar.gz | |
Add flag to control number of missing patterns in warnings
Non-exhaustive pattern warnings had their number of patterns to
show hardcoded in the past. This patch implements the TODO remark
that this should be made a command line flag.
-fmax-uncovered-patterns=<n>
can now be used to influence the number of patterns to be shown.
Reviewers: hvr, austin, bgamari
Reviewed By: bgamari
Subscribers: thomie
Differential Revision: https://phabricator.haskell.org/D2076
Diffstat (limited to 'docs/users_guide/using-optimisation.rst')
| -rw-r--r-- | docs/users_guide/using-optimisation.rst | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/docs/users_guide/using-optimisation.rst b/docs/users_guide/using-optimisation.rst index 5e4995d968..943651001a 100644 --- a/docs/users_guide/using-optimisation.rst +++ b/docs/users_guide/using-optimisation.rst @@ -120,7 +120,7 @@ list. case x of Red -> e1 - _ -> case x of + _ -> case x of Blue -> e2 Green -> e3 @@ -353,6 +353,13 @@ list. they may be numerous), but ``-fno-max-relevant-bindings`` includes them too. +.. ghc-flag:: -fmax-uncovered-patterns=<n> + + :default: 4 + + Maximum number of unmatched patterns to be shown in warnings generated by + :ghc-flag:`-Wincomplete-patterns` and :ghc-flag:`-Wincomplete-uni-patterns`. + .. ghc-flag:: -fmax-simplifier-iterations=<n> :default: 4 |