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49 lines
1.6 KiB
Haskell
49 lines
1.6 KiB
Haskell
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{- This file is part of Vervis.
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-
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- Written in 2016 by fr33domlover <fr33domlover@riseup.net>.
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-
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- ♡ Copying is an act of love. Please copy, reuse and share.
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-
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- The author(s) have dedicated all copyright and related and neighboring
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- rights to this software to the public domain worldwide. This software is
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- distributed without any warranty.
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-
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- You should have received a copy of the CC0 Public Domain Dedication along
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- with this software. If not, see
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- <http://creativecommons.org/publicdomain/zero/1.0/>.
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-}
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-- | CI views for avoiding ambiguity in the meaning of some typeclass
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-- instances, and allow two instances to coexist. For example, does 'show' show
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-- the original or the case-folded version? Using CI views, it's easy to
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-- specify that.
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--
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-- Note that some of the instances provided here, i.e. instances 'CI' already
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-- has, are reused directly by both views. If you aren't sure about a specific
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-- instance, check the source.
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module Data.CaseInsensitive.Local
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( AsOriginal (..)
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, mkOrig
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, AsCaseFolded (..)
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, mkFolded
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)
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where
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import Prelude
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import Data.CaseInsensitive
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import Data.Hashable (Hashable)
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import Data.String (IsString)
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newtype AsOriginal s = AsOriginal { unOriginal :: CI s }
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deriving (Eq, Ord, Read, Show, IsString, Monoid, Hashable, FoldCase)
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mkOrig :: FoldCase s => s -> AsOriginal s
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mkOrig = AsOriginal . mk
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newtype AsCaseFolded s = AsCaseFolded { unCaseFolded :: CI s }
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deriving (Eq, Ord, Read, Show, IsString, Monoid, Hashable, FoldCase)
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mkFolded :: FoldCase s => s -> AsCaseFolded s
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mkFolded = AsCaseFolded . mk
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