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core.​init.​meta.​exceptional

core.​init.​meta.​exceptional

source
exceptional
exceptional.​bind
exceptional.​fail
exceptional.​has_to_string
exceptional.​monad
exceptional.​return
exceptional.​to_bool
exceptional.​to_option
exceptional.​to_string
source
meta inductive exceptional  :
Type → Type

An exceptional is similar to Result in Haskell.

source
meta def exceptional.​to_string {α : Type} [has_to_string α] :
exceptional α → string

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@[instance]
meta def exceptional.​has_to_string {α : Type} [has_to_string α] :
has_to_string (exceptional α)

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meta def exceptional.​to_bool {α : Type} :
exceptional α → bool

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meta def exceptional.​to_option {α : Type} :
exceptional α → option α

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meta def exceptional.​bind {α β : Type} :
exceptional α → (α → exceptional β) → exceptional β

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meta def exceptional.​return {α : Type} :
α → exceptional α

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meta def exceptional.​fail {α : Type} :
format → exceptional α

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@[instance]
meta def exceptional.​monad  :
monad exceptional

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