On Sunday, 6 December 2015 at 14:41:01 UTC, Márcio Martins wrote:
I am writing a generic numerical array struct, and I can't find
a way to do element-wise comparison operators.
What I had envisioned was something like the following,
assuming a, b, c and m are array-like, and all operations
return arrays.
auto m = (a > b) * a + 15;
auto c = a.choose(a > b)^^2;
However, it seems this can't be achieved at the moment, as far
as I can tell.
The rewriting of a >= b to a.opCmp(b) >= 0 seems limiting in
the sense that it assumes scalar-like operands and semantics,
which is surprising, and goes against the awesome flexibility
of the remaining operator overloads.
Tried to look around, but according to google, the only
reference I have seen to this was someone with a similar
question in 2004, which is surprising to say the least. I
suppose either I am missing something really obvious, or I am
out of luck?
Don't use opCmp, all binary operators should be overriden using
opBinary. For more information I recommend this page
http://ddili.org/ders/d.en/operator_overloading.html
