On 9/15/11 4:44 AM, Don Clugston wrote:
I think there is a simple solution to 'static if'.
Do const folding on every static if condition, giving a boolean result.
Do NOT evaluate any static if bodies yet.
This would have the same effect as if every 'static if' were evaluated
simultaneously.
(There's a little bit of complexity with is() expressions that create
symbols, they need to be cached but not added to the scope yet).
Possibly const-fold every string mixin as well; this would make them
also act as if they were all evaluated simultaneously.
I don't know what should be done about template mixins though. But
they might not be much of a problem.
When this is complete, add all declarations from each static if body,
and from every mixin, into the scope.
When they're all inserted, look for static ifs and mixins again.
Repeat the process until none are left.
This sounds like a very robust solution to me. It also produces
intuitive behavior.
Andrei
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