WashNGo-2.12: WASH is a family of embedded domain specific languages (EDSL) for programming Web applications in Haskell.ContentsIndex
Internal use only. Provides access to class InputHandle and thus enables the construction new instances of this class, which requires knowledge about programming of validations.
class HasValue i where
value :: i a VALID -> a
extract a value from various kinds of input handles
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class InputHandle h where
validate :: h INVALID -> Either [ValidationError] (h VALID)
transforms an unvalidated input handle into either an error or a valid handle
isBound :: h INVALID -> Bool
ihNames :: h INVALID -> [String]
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