Re: is there any reason UFCS can't be used with 'new'?

[ketmar via Digitalmars-d-learn]

On Mon, 10 Nov 2014 19:07:38 +0000
Suliman via Digitalmars-d-learn <digitalmars-d-learn@puremagic.com>
wrote:

> /// How to use UFCS here?
> userName.name.sayHello();
> ///
you can't.

a little explanation: UFCS substitutes only the first argument. and for
class methods first argument is hidden 'this'. so you can't do it in
this way, you have to write `userName.sayHello(name);` here.

on the very low level calling class methods looks like this:

  // what you see:
  myobj.method(arg);

  // what compiler does:
  // method(myobj, arg);

so in your example compiler sees this:

  sayHello(userName.name);

which is obviously not what you want, 'cause you need this:

  sayHello(userName, name);

or, taking it the easier way: UFCS is for *functions*, not for
*methods*. that's why it "uniform *function* call syntax". it's not
expected to work with methods, as the name suggests. maybe it will be
easier to remember this way, rather than diving into compiler code
transformations. ;-)

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