Uniform initializer used in default argument to const reference

Question

Is this legal c++0x syntax?

class A
{
public:
    void some_function( const std::set &options = {} );
    // note that this is legal,          


        

Answer 1

It is valid in C++11, but it was a very late addition to the working paper that Bjarne put through. So it's not surprising that GCC doesn't support brace default arguments yet.