SOme fun with D compiler

[Daniel Kozak via Digitalmars-d]

Try to compile this:

import std.stdio;

auto xxx(T)()
{
     return this;
}

struct S
{
    mixin xxx!(typeof(this));
    alias xxx this;
}

void foo(S pos)
{
    writefln("(%.2f|%.2f)", pos.x, pos.y);
}

void main()
{
}


Or this:

import std.stdio;

auto xxx(T)()
if (is(T == struct))
{
     return this;
}

struct Vector2f
{
    mixin xxx!(typeof(this));
    alias xxx this;
}

void foo(ref const Vector2f pos) {}

void main()
{
    Vector2f v;
    foo(v);
}