17.09.2012 17:53, bearophile пишет:
From this long Reddit post:
http://www.reddit.com/r/haskell/comments/zxcks/haskell_vs_f_vs_scala_a_highlevel_language/c68ybn1
I have seen this linked page:
https://github.com/non/kind-projector
Where it introduces a (fragile) Scala syntax like:
Tuple3[Int, ?, ?]
That is similar to this D, but it's usable in-place:
template IntFirst3(T2, T3) { alias Tuple!(int, T2, T3) IntFirst3; }
A comparable hypothetical D syntax, for partial template application:
Tuple!(int, ?, ?)
Being it usable in-place, you can use it as:
static asssert(is(Tuple!(int, ?, ?)!(double, float) ==
Tuple!(int, double, float)));
It's a fun syntax: Foo!?
Bye,
bearophile
Just want to mention about existent (and more flexible than this syntax)
library solution.
Search for `Bind` here:
https://bitbucket.org/denis_sh/misc/src/tip/stdd/typetuple.d
--
Денис В. Шеломовский
Denis V. Shelomovskij
