On 12/13/17 11:30 AM, jmh530 wrote:
On Wednesday, 13 December 2017 at 16:00:32 UTC, Steven Schveighoffer wrote:
A nice puzzle for those template gurus out there.
I have a function like this:
auto foo(T: V[K], V, K)(T t)
{
RealAAType!(T, V, K) aa = t;
return aa;
}
So I need to know what to write RealAAType. What I'm looking for is a
mechanism to write the exact AA type that is passed in. RealAAType
should be an AA, and nothing else.
[snip]
How about:
template RealAAType!(T, V, K)
{
import std.traits : CopyConstness;
alias RealAAType = CopyConstness!(T, V[K]);
}
Yes, that seems to work, I was worried that something like this would
give me multiple type modifiers (.e.g const(const(int)[int])
Now, I need to figure out how to do this in object.d :)
BTW, the PR that spurred this for reference:
https://github.com/dlang/druntime/pull/1992
-Steve
