Joe Buck wrote:
On Tue, Sep 23, 2008 at 05:51:23PM -0400, Jason Merrill wrote:
Mark Mitchell wrote:
Is that desirable? Type-based alias analysis should be able to take
advantage of the difference between them; a "char **" and a "signed char
**" cannot point at the same thing, for example.
They can. In C++, a char* (or unsigned char*) can alias anything, and
any signed/unsigned type can alias the other signage.
Right, but a char** points to a char*, and a signed char** points to a
signed char*. The aliasing exception for char pointers doesn't cover this
case the way it does for the "one star" case.
Oops, I was overlooking the second *.
Jason
