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18 lines
436 B
Idris
18 lines
436 B
Idris
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module Data.Singleton
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||| The type containing only a particular value.
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||| This is useful for calculating type-level information at runtime.
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public export
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data Singleton : a -> Type where
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Val : (x : a) -> Singleton x
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-- pure and <*> implementations for idiom bracket notation
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public export
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pure : (x : a) -> Singleton x
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pure = Val
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public export
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(<*>) : Singleton f -> Singleton x -> Singleton (f x)
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Val f <*> Val x = Val (f x)
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