Haskell守护lambda函数？ [英] Haskell guards on lambda functions?

问题描述

是否有可能在lambda函数上有警卫？

Is it possible to have guards on lambda functions?

例如：

For example:

\k
    | k < 0     -> "negative"
    | k == 0    -> "zero"
    | otherwise -> "positive"

推荐答案

不可以。最近的直接翻译有点像

Nope. The nearest direct translation is something a bit like

\k -> case () of
       _ | k < 0     -> "negative"
         | k == 0    -> "zero"
         | otherwise -> "positive"

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