Re: Simple overloading without complications

[Meta via Digitalmars-d-learn]

On Tuesday, 12 July 2016 at 04:23:07 UTC, Adam Sansier wrote:
Now, I could simply make Do a template method but then this 
prevents it being a virtual function.

void Do(T)(T name) if (is(T == string) || is(T == int))
{
    Init_Data();

    static if (is(T == string))
    {
        ...Get index from name
    }

    ....
}

You could always use std.variant.algebraic which implements 
runtime polymorphism:

import std.algebraic;

alias intOrString = Algebraic!(int, string);

void Do(intOrString indexOrName)
{
    Init_Data();

    int index = indexOrName.visit!(
        (int i) => i,
        (string s) => getIndexByName(s),
    );

    ....
}