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kirsteins/Array -> UnsafeMutablePointer -> Array

Last active June 16, 2024 09:42
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Array -> UnsafeMutablePointer -> Array
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Array -> UnsafeMutablePointer -> Array
var initalArray = [1, 2, 3]
let pointer: UnsafeMutablePointer<Int> = UnsafeMutablePointer(initalArray)
let arrary = Array(UnsafeBufferPointer(start: pointer, count: initalArray.count))
@NazgulLee
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Hi, according to Apple's document:

The pointer created through implicit bridging of an instance or of an array’s elements is only valid during the execution of the called function. Escaping the pointer to use after the execution of the function is undefined behavior. In particular, do not use implicit bridging when calling an UnsafeMutablePointer initializer.

so, using pointer from

// Swift 3.0 Line 2
let pointer: UnsafeMutablePointer = UnsafeMutablePointer(mutating: initalArray)

is undefined.

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