overring binary

[rikki cattermole via Digitalmars-d-learn]

On 08/04/2017 7:46 AM, Jethro wrote:
> I have a custom type and I'm trying to do things like
>
> x~1 and 1~x.
>
> I can get x~1 no problem by overriding the op "~" but how to I get 1~x
> to convert 1 in to typeof(x)? instead of x in to typeof(1) so to speak?
>
> I really want D to realize that 1~x is suppose to use ~ of x, not 1.

struct Foo {
	int x;

	Foo opBinaryRight(string op)(int y) {
		static if (op == "~") {
			return Foo(x + y);
		} else static assert(0, "not implemented");
	}
}

void main() {
	import std.stdio;	
	writeln(1 ~ Foo(2));
}