David Greene wrote:
I asked this question a year or two ago on the list.
Has anyone come up with a good way to dump template metaprogramming information at compile time? I'd like to be able to do this both in a "print" sense (compiler warnings) and an "error" sence (compiler abort).
I think <boost/mpl/print.hpp> is supposed to do this, although I'm not sure how well it works over a wide range of compilers.
I hacked something together last week that sort of does the job. There's a print<Message, FileLine> class that has a constructor with an unused variable declared. gcc gives a nice warning with -Wall. I also have some hacked macros to pass file and line number information to the printer.
I think you'll find that different compilers give very different results. I suggest you try it on three or four compilers, at least. Jonathan