Anything like quote?

[Jean-Louis Leroy via Digitalmars-d-learn]

I want to create a string while making sure it qualifies as an 
identifier. Like this:

struct quote
{
  static @property string opDispatch(string str)() { return str; }
}
unittest
{
  assert(quote.foo == "foo");
}

Does it already exist somewhere in the language or the library?

J-L