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Monthly Downloads: 12
Programming language: Haskell
License: MIT License
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README

cased

Track string casing at the type level

Motivation

Why? Peace of mind. If you're algorithm is expecting strings with a specific case, you might as well enforce it at the type level.

Knowing the case of a string can be useful to prevent redundant toUpper and toLower applications. If your algorithm is expecting a lower case string, you might as well ask for one instead of doing it yourself.

Installation

$ cabal install cased

Example

import Data.Cased (upperCased, lowerCased, mixedCase)

myName :: Cased Mixed String
myName :: mixedCased "William Casarin"

upperName :: Cased Upper String
upperName = upperCased myName

-- repeated upper/lower casing is a compile error:
doubleUpper = upperCased upperName
--
--    Couldn't match type ‘Yes’ with ‘No’
--    Expected type: No
--      Actual type: IsUpperCased Upper
--

License

The MIT License (MIT)

Copyright (c) 2014 William Casarin

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.


*Note that all licence references and agreements mentioned in the cased README section above are relevant to that project's source code only.