On Mon, Oct 08, 2001 at 07:10:12PM +0100, Neil Booth wrote:
There are various issues with -C which are not good. It saves comments within a macro expansion, so that each invocation reproduces the comment.
I don't remember why we tried to do this in the first place. Until someone can remember why, turning them off again seems like a sensible plan.
These are fixable, if someone persuades me it's worth retaining the comments in macro expansions. We could convert C++ comments to C comments when saving them, and have directives call a new function _cpp_get_dtoken that filters out comment tokens.
All very doable.
I'd kind of like to see directives call a different function from cpp_get_token, but for a different reason: right now profiling the preprocessor is hindered by the gargantuan recursive cycle between all the directive handlers (and their children) and cpp_get_token. If there were an internal version that did do macro expansion but didn't do directive processing, and they used it, the cycle would go away.
zw