Make "`aa[key]`" use the same runtime call as "`key in aa`". The runtime calls these were using were different, but with equivalent definitions. With `ldc -O3`, the following functions now all compile to the exact same code: {{{ int[int] y; void foo(int x) { if (x in y) { auto z = x in y; sink(*z); } } void bar(int x) { if (x in y) { sink(y[x]); } } void baz(int x) { if (auto p = x in y) { sink(*p); } } }}}

struct Color {
  uint c;
  static Color opCall(uint _c) { Color ret; ret.c = _c; return ret; }
}

// run at compile time
static const Color white = Color(0xffffffff);

void main()
{
  assert(white.c == 0xffffffff);
}