What about something like int.CreateZeroValue(), or T.CreateZeroValue() and CreateZeroValueInterface?
On Thursday, June 18, 2020 at 7:34:55 PM UTC+3, bruno...@gmail.com wrote: > > First, congratulations on the working compiler! Very cool to try out > generics in Go. > > I was experimenting <https://go2goplay.golang.org/p/TCJGEprQ13K> with > some simple generic functions and felt the need for the zero value of a > generic type. I've read the discussion anticipated in your proposal > <https://go.googlesource.com/proposal/+/refs/heads/master/design/go2draft-type-parameters.md#the-zero-value>, > > so I'd like to use this topic just to provide my sentiment, and perhaps > gather it from others. > > In my opinion, the most Go-like proposal > <https://github.com/golang/go/issues/19642> is using '_' to signify the > zero value in RHS. We are already used to having '_' in LHS to accept > whatever type, and although the meaning is slightly changed (from > 'whatever' to 'zero'), it's conceptually close. > > I'm opposed to a change that uses '{}' or 'T{}' to mean zero type, as in > this proposal <https://github.com/golang/go/issues/12854>, because in my > mind curly braces are used for composite types. Imagining that 'T' is a > placeholder, It's weird replacing 'T{}' for 'int{}', for example. I'm super > in favor of having a leaner syntax for composite types, though 😁. > > Whatever is decided, please don't punt on this issue and recommend > '*new(T)'. That's really ugly and feels wrong to allocate and immediately > dereference the value just to circumvent a syntax change. Even if the > compiler is smart enough not to allocate anything, that's what's written in > the source code. > > Thanks. > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/df88fcc6-3422-4260-bcc7-b499f6c912ddo%40googlegroups.com.
