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Data
.
Option
.
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Imports
Init.Data.List.Lemmas
Imported by
Option
.
mem_toList
source
@[simp]
theorem
Option
.
mem_toList
{α :
Type
u_1}
{a :
α
}
{o :
Option
α
}
:
a
∈
o
.toList
↔
a
∈
o