CODEWITHSUNDEEP
arraysrustinitialization
Pete Fordham
Pete Fordham

Reputation: 2343

Array initialization for non-copyable type

I want to be able to do this:

let mut my_array: [MyType; 10] = [MyType::new(1, 2, 3, 4); 10];

when MyType isn't copyable, i.e. I want it to call the constructor for each element rather than calling it once and trying to copy. Is this possible?

Is it also possible to include the array index in the constructor call:

let mut my_array: [MyType; 10] = [MyType::new(_index, 2, 3, 4); 10];

so that my array is initialized with MyType:new(1,2,3,4), MyType:new(2,2,3,4), MyType:new(3,2,3,4), etc.

Upvotes: 3

Views: 784

Answers (1)

Challenger5
Challenger5

Reputation: 1064

The array-init library provides a safe interface to do this:

let mut my_array: [MyType; 10] = array_init(|i| MyType::new(i, 2, 3, 4));

Upvotes: 3

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