Re: Iterating over the tupleof of a struct

[Meta via Digitalmars-d-learn]

On Saturday, 23 August 2014 at 20:34:35 UTC, Ali Çehreli wrote:
There are a number of inconsistencies around tuples. The 
behavior you expect is present for ranges that return tuple 
fronts:

import std.stdio;
import std.typecons;
import std.range;

void main()
{
    auto t = [ tuple(1.5, 100), tuple(2.5, 200) ];

    foreach (a, b; t.retro) {
        writefln("%s, %s", a, b);
    }
}

Because t.retro is a range, the foreach extracts the members of 
the tuple and we get the folloing output:

2.5, 200
1.5, 100

Now, remove the .retro part; the range becomes a slice, in 
which case 'a' becomes the iteration counter and 'b' becomes 
the tuple value:

0, Tuple!(double, int)(1.5, 100)
1, Tuple!(double, int)(2.5, 200)

Is that a WAT? :)

Ali

I cannot wait until we get proper tuple destructuring and this 
buggy foreach unpacking dies.