Provided by: libstdc++-15-doc_15.2.0-10ubuntu1_all 

NAME
std::_Placeholder< _Num > - The type of placeholder objects defined by libstdc++.
SYNOPSIS
#include <functional>
Detailed Description
template<int _Num>
struct std::_Placeholder< _Num >"The type of placeholder objects defined by libstdc++.
Since
C++11
Author
Generated automatically by Doxygen for libstdc++ from the source code.
libstdc++ std::_Placeholder< _Num >(3cxx)