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Within LTS Haskell 24.40 (ghc-9.10.3)

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  1. Parent :: Int -> Parent

    persistent-test ForeignKey

    No documentation available.

  2. data ParentComposite

    persistent-test ForeignKey

    No documentation available.

  3. ParentComposite :: Int -> Int -> ParentComposite

    persistent-test ForeignKey

    No documentation available.

  4. type ParentCompositeId = Key ParentComposite

    persistent-test ForeignKey

    No documentation available.

  5. type ParentId = Key Parent

    persistent-test ForeignKey

    No documentation available.

  6. data ParentImplicit

    persistent-test ForeignKey

    No documentation available.

  7. ParentImplicit :: Int -> ParentImplicit

    persistent-test ForeignKey

    No documentation available.

  8. type ParentImplicitId = Key ParentImplicit

    persistent-test ForeignKey

    No documentation available.

  9. data Proxy (t :: k)

    persistent-test Init

    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

  10. Proxy :: Proxy (t :: k)

    persistent-test Init

    No documentation available.

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