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core.​init.​control.​monad_fail

core.​init.​control.​monad_fail

source
match_failed
monad_fail
monad_fail_lift
source
@[class]
structure monad_fail  :
(Type u → Type v) → Type (max (u+1) v)
  • fail : Π {a : Type ?}, string → m a

Instances
source
def match_failed {α : Type u} {m : Type u → Type v} [monad_fail m] :
m α

Equations
source
@[instance]
def monad_fail_lift (m n : Type u → Type v) [monad n] [monad_fail m] [has_monad_lift m n] :
monad_fail n

Equations

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