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17 lines
512 B
Idris
17 lines
512 B
Idris
public export
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interface Do (0 m : Type) where
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0 Next : m -> Type
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bind : (x : m) -> Next x
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-- Test that the implicits don't turn into as patterns on the LHS - they
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-- shouldn't, because the elaborator hasn't got that far yet
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foom : Int -> {a, b : Type} -> (a -> b) -> a -> b
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foom = ?thurlingdrome
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-- Similarly, for bind (we can't just implement it as >>= because of where
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-- the implicits end up...)
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public export
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Monad m => Do (m a) where
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Next x = {b : Type} -> (a -> m b) -> m b
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bind = ?oops -- (>>=)
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