bearophile <bearophileh...@lycos.com> wrote:
If (as usual) you don't want to implement this as a new D feature, I
presume something like a
PartialTemplate/StaticCurry/StaticPartialApplication is writeable in the
standard library:
import std.typecons, std.functional, std.array;
auto optArg(alias pred, alias fn, Range)(Range r) {
alias binaryFun!pred predicate;
alias unaryFun!fn func;
auto result = tuple(r.front, func(r.front));
foreach (e; r) {
auto tmp = func(e);
if (predicate(e, result[1]))
result = tuple(e, tmp);
}
}
void main() {
alias PartialTemplate!(optArg, "a < b") minArg;
alias PartialTemplate!(minArg, "a") foo;
assert(foo([5, 2, 1, 3]) == tuple(1, 1));
}
dranges has something like this:
http://svn.dsource.org/projects/dranges/trunk/dranges/docs/templates.html
see CurryTemplate
--
Simen
