Today I ran into an interesting situation where I have a function f that
needs to return ranges of different types (but identical element types):
auto f(A...)(A args) {
...
if (someCondition)
return cartesianProduct(x, y)
.joiner;
else
return cartesianProduct(x, y)
.joiner
.filter!someFilter;
}
This obviously can't compile, because the return types are not the same.
(Note that someCondition is only known at runtime.) But abstractly
speaking, it *should* work, because the element type of the returned
range is identical.
So how would I implement something like this?
T
--
The fact that anyone still uses AOL shows that even the presence of options
doesn't stop some people from picking the pessimal one. - Mike Ellis
