On Monday, 13 October 2014 at 08:29:42 UTC, 岩倉 澪 wrote:
From what I've found, there was some work on this in the past
(http://forum.dlang.org/thread/[email protected]?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?
My limited Scala experience from several years ago suggests this
is not something worth doing. The names of parameters are part of
the API. Suppose you have a method like
def foo(x: int = 1000, y: double = 0.0): double {}
If you later change the names to something more informative
def foo(reps: int = 1000, variance: double = 0.0): double {}
you've potentially broken existing code. Maybe there are better
approaches than that of Scala, but doing anything like that to D
would be a huge mistake for little gain. (I write a lot of R
code, for which named parameters are the norm, so I understand
the convenience.)
