std::filesystem::directory_iterator:: operator++, std::filesystem::directory_iterator:: increment

From cppreference.com
directory_iterator & operator ++ ( ) ;
(1) (since C++17)
directory_iterator & increment ( std:: error_code & ec ) ;
(2) (since C++17)

Advances the iterator to the next entry. Invalidates all copies of the previous value of * this .

Parameters

ec - error code to store error status to

Return value

* this

Exceptions

Any overload not marked noexcept may throw std::bad_alloc if memory allocation fails.

1) Throws std::filesystem::filesystem_error on underlying OS API errors, constructed with the OS error code as the error code argument.
2) Sets a std:: error_code & parameter to the OS API error code if an OS API call fails, and executes ec. clear ( ) if no errors occur.

Example

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR Applied to Behavior as published Correct behavior
LWG 3013 C++17 error_code overload marked noexcept but can allocate memory noexcept removed