std::exception::operator= (3) - Linux Manuals
std::exception::operator=: std::exception::operator=
NAME
std::exception::operator= - std::exception::operator=
Synopsis
exception& operator=( const exception& other ) throw(); (until C++11)
exception& operator=( const exception& other ) noexcept; (since C++11)
Copy assignment operator. Assigns the contents of other
The effects of calling what() after assignment are implementation-defined. (until C++11)
If *this and other both have dynamic type std::exception then std::strcmp(what(), other.what()) == 0. (since C++11)
Parameters
other - another exception to assign the contents of