Will D ever get optional named parameters?

[岩倉 澪]

From what I've found, there was some work on this in the past 
(http://forum.dlang.org/thread/wokfqqbexazcguffw...@forum.dlang.org?page=6#post-thclpgdlfxxhhfklwsoj:40forum.dlang.org), 
but a pull request was never made/I don't seem to find discussion 
about adding it as a feature anywhere.

I think optional named parameters would be a nice addition, 
either to the core language, or something like the monadic 
solution from that old thread in phobos.

Are there good reasons not to add something like this to the 
language, or is it simply a matter of doing the work? Has it been 
discussed much?