hijacking override from template mixin
monarch_dodra via Digitalmars-d-learn
digitalmars-d-learn at puremagic.com
Mon Jun 9 09:13:49 PDT 2014
On Monday, 9 June 2014 at 15:54:21 UTC, Ivan Kazmenko wrote:
> I'd expect a "multiple overrides of same function" error, much
> like if I just paste the mixin code by hand. Is that a bug or
> working by design? In the latter case, please explain the
> reasoning.
AFAIK, the rationale is that *should* a colision happen, the
local symbol shadows the mixed-in symbol. Doing this avoid
breaking your code just because someone added an extra member in
their mixin, which happened to conflict with one of yours.
The idea is that you can workaround the issue by "naming" your
mixin templates. Then, when you want to access members of the
mixin template, you *know* it'll always work, regardless of what
else may have been declared in your class.
That said, for something like virrtual functions, things get a
bit trickier, since your *aren't* supposed to call them
explicitly... I don't know if bug, or just surprising behavior.
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