I think, if I want int/[]int, I should use int/[]int or just declare a 
domain specific alias.
MyInt/[]MyInt should implement Lesser/Min/etc interface. It can declare 
specific comparison rules.

Min implementation can be like: https://go2goplay.golang.org/p/Fgo2fJAlKXD 
(this code does not compile, I don't know why)

My point is that this decision is not Go1-like and can cause unexpected 
runtime errors.

суббота, 27 июня 2020 г. в 23:03:25 UTC+3, Ian Lance Taylor: 

> On Sat, Jun 27, 2020 at 12:35 PM a b <tanc1...@gmail.com> wrote:
> >
> > Newtype is a expression like
> > type MyInt int
> >
> > It's not the same type as int, so why it's permitted?
> > In Go1 you must perform explicit conversion.
> Because if you have a []MyInt, it would be nice to be able to pass
> that to a function like slices.Min. Note that you can't directly
> convert []MyInt to []int.
> Ian

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