Re: [boost] [MSM] compile errors

Subject: Re: [boost] [MSM] compile errors
From: Christophe Henry (christophe.j.henry_at_[hidden])
Date: 2009-12-11 04:02:34

>As we saw over in the "[fusion] change on trunk breaking proto" thread,
>even VC10 has bugs that cause random failures in proto's tests. Using
>proto isn't necessarily a talisman against compile errors.

Sure. In this case, proto has only a very limited role, at most the
one of a trigger. Specifically, VC8 has problems with enable_if for
template class specializations.
Interestingly, it has a problem with Process2_ eventhough it doesn't
even use it, just including the header is enough to get the bug. Even
more interesting, the next template specialization (Get_Flag_) doesn't
seem to disturb the compiler...

Anyway, all VC compilers suffer from the same disease. Most template
constructs will manage to compile once, but repeat the operation too
much and it gives up. I'd bet that Microsoft uses tons of test cases
which try any construct once.

I actually only try to support eUML for VC8 to honor the fact that it
implemented a typeof back in 2005.

Christophe