[Issue 20079] [2.087.0] Forward declaration of functions defined in mixin templates don't compile

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20079

jacob <look.at.me.pee.please at gmail.com> changed:

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--- Comment #2 from jacob <look.at.me.pee.please at gmail.com> ---
This isn't a bug, it is intended behavior. A mixin shouldn't overwrite a
function in that way. Mixins aren't macros, they have limitations so that it
doesn't unexpectedly change the meaning of something else.

Just don't include the forward declare. But something tells me you want to have
that behavior, such that forward declare would link to an external C++ function
or something, unless that mixin defines the function of the body. It would then
link to the D version?

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