Struct Initialization syntax

Jacob Carlborg doob at me.com
Mon Jul 23 19:11:24 UTC 2018


On 2018-07-23 18:26, Seb wrote:
> tl;dr: the currently proposed syntax options are:
> 
> 
> ---
> struct S
> {
>      int a = 2, b = 4, c = 6;
> }
> void foo()
> {
>      bar(S({c: 10})); // Option 1
>      bar(S(c: 10));   // Option 2
>      bar(S{c: 10});   // Option 3
> }
> ---
> 
> So the struct-initialization DIP has been stalled for too long and I 
> think it's time we finally get this story done.
> I personally prefer option 2, but this might be in conflict to named 
> arguments which we hopefully see in the near future too. Hence, I'm 
> leaning forward to proposing Option 1 as the recommended Option for the 
> DIP (that's also what the PoC DMD PR implements). What's your take on this?
> 
> DIP: https://github.com/dlang/DIPs/pull/71
> Rendered view: 
> https://github.com/wilzbach/DIPs/blob/struct-initialization/DIPs/DIP1xxx-sw.md 

Talking about future potential features, Option 1 could be in conflict 
with a tuple with named elements. Option 2 could be in conflict with 
named parameters, true, but named parameters could also have a different 
syntax, i.e. foo(a = 3, b = 4), this is what Scala is using.

-- 
/Jacob Carlborg


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