Created
April 26, 2022 16:26
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Optional assignment operator #swift
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| infix operator ??= : AdditionPrecedence | |
| extension Optional { | |
| static func ??= (_ rhs: inout Self, _ lhs: Self) { | |
| if rhs == nil { | |
| rhs = lhs | |
| } | |
| } | |
| } | |
| var a: Int? = nil | |
| var c: Int? = 9 | |
| let b = 13 | |
| a ??= b | |
| c ??= b | |
| print(a) | |
| print(c) |
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