std::filesystem::filesystem_error:: operator=

From cppreference.com
filesystem_error & operator = ( const filesystem_error & other ) noexcept ;
(since C++17)

Assigns the contents with those of other . If * this and other both have dynamic type std::filesystem::filesystem_error then std:: strcmp ( what ( ) , other. what ( ) ) == 0 after assignment.

Parameters

other - another filesystem_error object to assign with

Return value

* this

Notes

Typical implementations store path objects referenced by path1() and path2() in a reference-counted storage. As a result, * this and other usually share their path objects after assignment.

Example