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instate

effect.type.instate

(R 
type
, e effect.this.type, code Function R, def Unary R effect.this.type)
 => 
R
execute 'code' in a context where the effect instance `e` has been
installed for effect type `effect.this`.

In case `f` returns normally, this will return `f`'s result.

In case `f` aborts this effect, return `def()`.

Type Parameters

0.099dev (GIT hash a68bce9af280552faedee34cd5433dc10b6454de)
last changed: 2026-10-14