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| author | Veronika Romashkina <vrom911@gmail.com> | 2020-02-26 10:49:03 +0000 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-02-26 11:49:03 +0100 |
| commit | d2ee5b2b0eb2afb970ab8d4feed84434dc8236e0 (patch) | |
| tree | 56a3be8e658dfc134259c61314cca00964f692d8 /lib/Hakyll/Core/Metadata.hs | |
| parent | 7b924e7d6b98db7de64fa8fc5cae14a3ea35965c (diff) | |
| download | hakyll-d2ee5b2b0eb2afb970ab8d4feed84434dc8236e0.tar.gz | |
Support GHC-8.8
Add MonadFail instances and constraints.
Diffstat (limited to 'lib/Hakyll/Core/Metadata.hs')
| -rw-r--r-- | lib/Hakyll/Core/Metadata.hs | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Hakyll/Core/Metadata.hs b/lib/Hakyll/Core/Metadata.hs index 1cf536e..9d99857 100644 --- a/lib/Hakyll/Core/Metadata.hs +++ b/lib/Hakyll/Core/Metadata.hs @@ -66,7 +66,7 @@ getMetadataField identifier key = do -------------------------------------------------------------------------------- -- | Version of 'getMetadataField' which throws an error if the field does not -- exist. -getMetadataField' :: MonadMetadata m => Identifier -> String -> m String +getMetadataField' :: (MonadFail m, MonadMetadata m) => Identifier -> String -> m String getMetadataField' identifier key = do field <- getMetadataField identifier key case field of |