DIP80: phobos additions

[Tofu Ninja via Digitalmars-d]

On Thursday, 25 June 2015 at 01:32:22 UTC, Timon Gehr wrote:
> [...]

Heres what I came up with... I love D so much <3

module util.binOpProxy;

import std.algorithm : joiner, map;
import std.array : array;
struct __typeproxy(T, string s)
{
	enum op = s;
	T payload;
	auto opUnary(string newop)()
	{
		return __typeproxy!(T,newop~op)(payload);
	}
}

/**
  * Example:
  * struct test
  * {
  *     mixin(binOpProxy!("~", "*"));
  *
  *     void opBinary(string op : "+~~", T)(T rhs)
  *     {
  *         writeln("hello!");
  *     }
  *
  *     void opBinary(string op : "+~+-~*--+++----*", T)(T rhs)
  *     {
  *         writeln("world");
  *     }
  *
  *     void opBinary(string op, T)(T rhs)
  *     {
  *         writeln("default");
  *     }
  * }
  *
  */
enum binOpProxy(proxies ...) = `
     import ` ~ __MODULE__ ~ ` : __typeproxy;
     auto opBinary(string op, D : __typeproxy!(T, T_op), T, string 
T_op) (D rhs)
     {
         return opBinary!(op~D.op)(rhs.payload);
     }
` ~ [proxies].map!((string a) => `
     auto opUnary(string op : "` ~ a ~ `")()
     {
         return __typeproxy!(typeof(this),op)(this);
     }
`).joiner.array;