Why does `Array` have an inline constructor when the compile

Question

Why does `Array` have an inline constructor when the compiler says this is disallowed in my own code

voddan · Answer

darkmoon uk what constructor are you referring to

voddan · Answer

AFAIK `inline constructor` is not a thing

darkmoon_uk · Answer

Exactly my point

darkmoon_uk · Answer

but look at kotlin Array

darkmoon_uk · Answer

public inline constructor size Int init Int gt T

voddan · Answer

eyes

darkmoon_uk · Answer

And something about it is really ruining my day something I thought would be easy I want to create an Array lt T gt inside MyClass lt T gt s initializer It won t have it because calling Array lt T gt it s insisting it be reified and I can t have reified T inside a constructor

darkmoon_uk · Answer

I can pass in KClass but that doesn t help with creating Array lt T gt either

darkmoon_uk · Answer

I can make a reified create method in Companion class but that requires I expose the Array lt T gt as part of MyClass s public constructor which I don t want to do

darkmoon_uk · Answer

It looks like a bit of a hole in the language TBH

voddan · Answer

Arrays ARE objects bth `inline` there is for the lambda performance

darkmoon_uk · Answer

Hmm I guess this is no more restrictive than Java will have to consider using `Array lt Any gt ` and casting inside my class

darkmoon_uk · Answer

Thx

voddan · Answer

< darkmoon uk> I know I ve mentioned it but why would you use `Array` instead of `List` or `MutableList` Their performance are exactly the same but lists have normal generics

darkmoon_uk · Answer

with it s immediate fixed size specification and initialization function this is the exact API I would like to store image data

darkmoon_uk · Answer

I can recreate this for list but it will be extra work it s a shame the generic behaviour of Array is peculiar Especially when it s all just same sized object pointers at the end of the day

voddan · Answer

gt initialization function Do you mean that <https github com JetBrains kotlin blob 1 1 2 libraries stdlib src kotlin collections Collections kt L123>

darkmoon_uk · Answer

Shame gratitude thanks

darkmoon_uk · Answer

List fixes all slightly smiling face

voddan · Answer

Shame on us as a community because those function are really tough to find without knowing they exist We need new ideas for docs and fast

radityagumay · Answer

Actually inline for performance purpose and you can inline kind of tailrecursion for example

radityagumay · Answer

Kindly watch hadi hariri presentation about tailrecursion