Re: how to access struct member using [] operator?

[Lodovico Giaretta via Digitalmars-d-learn]

On Sunday, 25 September 2016 at 09:01:44 UTC, Namespace wrote:
----
import std.stdio;
struct Something
{
    int x, y;
    float z;

    auto opIndex()(string member) {
                switch (member) {
                        case "x": return this.x;
                        case "y": return this.y;
                        case "z": return this.z;
                        default: assert(0);
                }
    }
}

void main(string[] args)
{
    Something s;
    writeln(s["x"]);
    writeln(s["z"]);
}
----

Doesn't work. s["x"] is returned as float in this example. The 
reason is, opIndex cannot magically change return type based on 
the passed-in string.