Tuple indexing and slicing

[Simen Kjaeraas]

On 2013-07-11, 00:52, Timothee Cour wrote:

> Why not support Tuple indexing and slicing with [] syntax?
>  (see below for a way to index/slice a tuple)
>
> void main(){
>   alias T=Tuple!(int,double);
>   pragma(msg,T[0].stringof);//_expand_field_0
>   //pragma(msg,T[0..2].stringof); //Error: cannot slice type 'Tuple!(int,
> double)
>   pragma(msg,typeof(T.init[0]).stringof);//int
>   pragma(msg,typeof(tuple(T.init[0..$])).stringof);//Tuple!(int,double)
> }

This works:

import std.typecons : Tuple, tuple;
void main() {
     alias T = Tuple!(int, string, float);
     T a;
     Tuple!(int, string) b = tuple(a[0..2]); // Slicing values.
     Tuple!(T.Types[1..3]) c; // Slicing types.
}

-- 
Simen