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authorJasper Van der Jeugt <m@jaspervdj.be>2013-08-13 01:38:18 +0200
committerJasper Van der Jeugt <m@jaspervdj.be>2013-08-13 01:38:18 +0200
commitfaa90283bfdd13740ebecd91c3f966591d183d79 (patch)
treeed290afc2d74f4c05223d729a15024ac9d2c6f2b /src/Hakyll/Web/Template
parent0b111066b0903812125cd55ca1bbabda4d09d445 (diff)
downloadhakyll-faa90283bfdd13740ebecd91c3f966591d183d79.tar.gz
Explode when using mapContext over ListField
Diffstat (limited to 'src/Hakyll/Web/Template')
-rw-r--r--src/Hakyll/Web/Template/Context.hs8
1 files changed, 5 insertions, 3 deletions
diff --git a/src/Hakyll/Web/Template/Context.hs b/src/Hakyll/Web/Template/Context.hs
index 428e105..98662dd 100644
--- a/src/Hakyll/Web/Template/Context.hs
+++ b/src/Hakyll/Web/Template/Context.hs
@@ -100,9 +100,11 @@ functionField name value = Context $ \k i -> case words k of
mapContext :: (String -> String) -> Context a -> Context a
mapContext f (Context c) = Context $ \k i -> do
fld <- c k i
- return $ case fld of
- StringField str -> StringField (f str)
- ListField ctx is -> ListField ctx is
+ case fld of
+ StringField str -> return $ StringField (f str)
+ ListField _ _ -> fail $
+ "Hakyll.Web.Template.Context.mapContext: " ++
+ "can't map over a ListField!"
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