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Within LTS Haskell 24.40 (ghc-9.10.3)
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class
Proposition (f :: k -> Type)equational-reasoning Proof.Equational No documentation available.
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equational-reasoning Proof.Equational Proxy is a type that holds no data, but has a phantom parameter of arbitrary type (or even kind). Its use is to provide type information, even though there is no value available of that type (or it may be too costly to create one). Historically, Proxy :: Proxy a is a safer alternative to the undefined :: a idiom.
>>> Proxy :: Proxy (Void, Int -> Int) Proxy
Proxy can even hold types of higher kinds,>>> Proxy :: Proxy Either Proxy
>>> Proxy :: Proxy Functor Proxy
>>> Proxy :: Proxy complicatedStructure Proxy
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equational-reasoning Proof.Equational No documentation available.
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Provides type synonyms for logical connectives.
PersistArray :: [PersistValue] -> PersistValueesqueleto Database.Esqueleto Intended especially for PostgreSQL backend for text arrays
PersistBool :: Bool -> PersistValueesqueleto Database.Esqueleto No documentation available.
PersistByteString :: ByteString -> PersistValueesqueleto Database.Esqueleto No documentation available.
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esqueleto Database.Esqueleto Represents a value containing all the configuration options for a specific backend. This abstraction makes it easier to write code that can easily swap backends.
type family
PersistConfigBackend c :: Type -> Type -> Type -> Typeesqueleto Database.Esqueleto No documentation available.
type family
PersistConfigPool cesqueleto Database.Esqueleto No documentation available.