On Saturday, 20 January 2018 at 19:09:28 UTC, Adam D. Ruppe wrote:
On Saturday, 20 January 2018 at 19:04:06 UTC, jsako wrote:
I want to be able to filter a range based on a variable known
at runtime. Something like this:
[code]
int id = getFilterID();
auto filteredRange = filter!(a => a.id ==
id)(rangeToBeFiltered);
[/code]
This doesn't seem to be possible, however as .filter only
takes unary predicates. I tried:
That should actually work. What exactly happened when you ran
that literal code above?
... Huh. The code I posted was a simplified case of what I
actually have and like a fool I didn't test it first. You're
absolutely right, the above code does work. Color me embarrassed.
In the actual code, I kept getting DMD saying "...does not match
template declaration filter(alias predicate) if
(is(typeof(unaryFun!predicate)))".
I think it may be a scoping issue? I'll have to look closer at it.
Thanks for the help! Sorry I wasted your time. At least this
pointed me in the right direction to find out what is really
going on.
