On 15 November 2012 15:32, Andrey Semashev <andrey.semashev@gmail.com> wrote:
On Thu, Nov 15, 2012 at 7:24 PM, Daniel James <dnljms@gmail.com> wrote:
On 15 November 2012 14:54, Daniel James <dnljms@gmail.com> wrote:
I tried building with Clang 3.1 in C++11 mode, and I got the same errors as you.
I think it's a clang bug, here's a test case:
template <typename T> struct foo {}; foo<decltype(1 > 0)> x;
It thinks the '>' from '1 > 0' is an angle bracket, I guess it has been fixed on clang trunk. A workaround is just to double the round brackets. I've attached a patch that I used to get Boost.Test to compile. It's a bit messy though.
Note there is difference between decltype(x) and decltype((x)), so the change may alter the behavior. I didn't examine the code to confirm that though, just a heads up.
Well, that's annoying. Just had a very quick read up on the issue, and I think it's okay. The expression is: typename boost::remove_reference< decltype((boost::declval<Lhs>() oper boost::declval<Rhs>() ))>::type result_type; 'oper' is a macro parameter, which is never '.' or '->' (obviously, given that it wouldn't work). So I don't think it counts as an id or member expression. 'oper' is '->*' in one case, but I don't think that's affected? If it is, the 'remove_reference' should help, maybe it would need to use 'remove_const' as well? Btw. please can someone with clang from subversion try the test case?