(c++11) Why can std::bind be used without the std namespace prefix?
Michael Haubenwallner
michael.haubenwallner@ssi-schaefer.com
Thu May 16 15:15:00 GMT 2019
Hi,
it turns out that the std::bind template (since C++11) can be used
without the std:: namespace prefix ('ve tried 4.8.4, 8.3.0, 9.1.0).
But why?
That is, I fail to see how 'bind' can resolve to '::std::bind'
in this example, where one would expect a compilation failure:
#include <functional>
struct Object {
int get42() { return 42; }
};
int doGet42(Object * o)
{
return bind(&Object::get42, ::std::placeholders::_1)(o);
}
However, using '::bind' does fail as expected.
Thanks!
/haubi/
More information about the Gcc-help
mailing list