Re: [boost] enable_if question

The code works for me (as written above) on GCC 4.7 (both with -m32 and -m64 on x86-64, and with -std=c++98 and -std=c++0x, -ansi -pedantic). I don't see a reason that it would be ambiguous.

My bad, you're quite right. The problem I can only reproduce with VC10 and when a certain header is #included before the code in question - in fact it's a particular usage of enable_if in that header that triggers the problem - I can't boil it down to a reduced test case though, so it's going to be one of those strange compiler quirks I guess. Very annoying though :-( Thanks, John.