17 lines
331 B
Plaintext
17 lines
331 B
Plaintext
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module Ask where
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import Prelude hiding (bind,discard)
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import Unsafe.Coerce (unsafeCoerce)
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class Ask a where
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ctx :: a
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pure :: forall ctx a. a -> Ask ctx => a
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pure a = a
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foreign import ask :: forall ctx. ((Ask ctx) => ctx)
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handleAsk :: forall a ctx. ctx -> (Ask ctx => a) -> a
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handleAsk = unsafeCoerce \c f -> f { ctx: c }
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