Re: Does D provide automatic dereferencing for accessing members through pointers?

[Andrew Godfrey via Digitalmars-d-learn]

On Friday, 29 August 2014 at 05:05:55 UTC, H. S. Teoh via 
Digitalmars-d-learn wrote:
On Fri, Aug 29, 2014 at 04:37:37AM +0000, Andrew Godfrey via 
Digitalmars-d-learn wrote:
Unless the property you're accessing is also a pointer 
property, like
sizeof. Then you have to be careful.

True. Though if you're writing generic code, chances are that 
what you
want is the pointer size rather than the size of the referenced 
object.
You only really get into trouble when you have to explicitly 
work with
pointers.

Thanks for the link.
'sizeof' is not so bad anyway because it's a property of the type.
It would be worse if pointers had properties.

If you're insane enough to do the following, then this happens...

struct Foo {
    int bar() { return 10; }
}

int bar(Foo f) { return 42; }
int bar(Foo *f) { return 43; }
int bar(Foo **f) { return 44; }

unittest {
    Foo foo;
    auto pfoo = &foo;
    assert((*pfoo).bar == 10);
    assert(pfoo.bar == 10);

    auto ppfoo = &pfoo;
    assert(ppfoo.bar == 44);
}