On Friday, 15 January 2016 at 20:48:39 UTC, anonymous wrote:
On 15.01.2016 21:42, Nordlöw wrote:
How do I index a function parameter tuple with a run-time
index?
With a switch and a static foreach:
----
void f(A...)(size_t i, A a)
{
import std.stdio: writeln;
switch_: switch (i)
{
foreach (iT, T; A)
{
case iT: writeln(T.stringof); break switch_;
}
default: writeln("??"); break;
}
}
void main()
{
f(0, "foo", 42); /* string */
f(1, "foo", 42); /* int */
f(2, "foo", 42); /* ?? */
}
----
And of course I'm proven wrong as soon as I post :) Sometimes I
forget how powerful D's code generation abilities are.
