• Vadim Goryunov (17/17) Feb 26 2012 In "The D programming language" chapter 5.9.1 Pseudo Members
• Vadim Goryunov (2/2) Feb 26 2012 Apologies, I've just found there is a bug id for this
• Brad Anderson (9/11) Feb 27 2012 Here's a list of the remaining issues marked as discrepancies between th...

"Vadim Goryunov" <vadim.goryunov gmail.com> writes:

In "The D programming language" chapter 5.9.1 Pseudo Members 
Andrei says that D rewrites a.fun(b,c,d) as fun(a,b,c,d) if fun 
is not a member of a's type.
In the following example this is working for arrays only (T[]), 
but not for user defined class A.
Are pseudo members going to be implemented for user defined types 
eventually? Or is it considered a "hack" for arrays only?

class A {
      property int length() { return 0; }
}

 property bool empty(T)(T a) { return a.length == 0; }

unittest {
     int[] array;
     array.empty;

     auto obj = new A();
     obj.empty;   // Error: no property 'empty' for class 'Test.A'
}

"Vadim Goryunov" <vadim.goryunov gmail.com> writes:

Apologies, I've just found there is a bug id for this

http://d.puremagic.com/issues/show_bug.cgi?id=3382

Brad Anderson <eco gnuk.net> writes:

On Sun, Feb 26, 2012 at 3:44 AM, Vadim Goryunov <vadim.goryunov gmail.com>wrote:

 Apologies, I've just found there is a bug id for this

 http://d.puremagic.com/issues/**show_bug.cgi?id=3382<http://d.puremagic.com/issues/show_bug.cgi?id=3382>

Here's a list of the remaining issues marked as discrepancies between the
compiler and the book:

http://d.puremagic.com/issues/buglist.cgi?quicksearch=%5Btdpl%5D

Referring to that list and also the TDPL errata <
http://erdani.com/tdpl/errata/> can be helpful when you encounter something
in TDPL that isn't working.

Regards,
Brad Anderson