[LLVMbugs] [Bug 18072] Template ambiguous operator overload - with tescase

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Tue Nov 26 16:28:18 PST 2013


Richard Smith <richard-llvm at metafoo.co.uk> changed:

           What    |Removed                     |Added
             Status|NEW                         |RESOLVED
                 CC|                            |richard-llvm at metafoo.co.uk
         Resolution|---                         |INVALID

--- Comment #1 from Richard Smith <richard-llvm at metafoo.co.uk> ---
This is deliberate; it's a C++11 rule that GCC doesn't implement yet.

Note that your two 'operator<<' overloads really should be ambiguous: they're
both exact matches, they're both function templates, and neither of them is
more specialized than the other. C++98's rules didn't handle this case very
well (and arbitrarily picked the member function, because they failed to take
into account the ordering of the *this parameter); C++11's rules do the right
thing here, and Clang implements them in C++11 mode.

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