Re: lazy variables

[Paul Backus via Digitalmars-d-learn]

On Wednesday, 17 October 2018 at 07:32:37 UTC, aliak wrote:
lazy S x = () {
    // do some heavy stuff
}();
if (condition) {
  func(x.y); // heavy stuff evaluated here
}

auto x = () {
    // do some heavy stuff
};

if (condition) {
    func(x().y); // heavy stuff evaluated here
}

If you want to make it a little prettier, you could define a 
couple helper functions:

T delegate() delay(lazy T expr)
{
    return () => expr;
}

T force(T delegate() thunk)
{
    return thunk();
}