std::filesystem::directory_iterator::directory_iterator (3) - Linux Manuals

std::filesystem::directory_iterator::directory_iterator: std::filesystem::directory_iterator::directory_iterator

NAME

std::filesystem::directory_iterator::directory_iterator - std::filesystem::directory_iterator::directory_iterator

Synopsis

directory_iterator() noexcept; (1) (since C++17)
explicit directory_iterator( const std::filesystem::path& p ); (2) (since C++17)
directory_iterator( const std::filesystem::path& p, (3) (since C++17)
std::filesystem::directory_options options);
directory_iterator( const std::filesystem::path& p, std::error_code& ec ); (4) (since C++17)
directory_iterator( const std::filesystem::path& p,
std::filesystem::directory_options options, (5) (since C++17)
std::error_code& ec );
directory_iterator( const directory_iterator& ) = default; (6) (since C++17)
directory_iterator( directory_iterator&& ) = default; (7) (since C++17)

Constructs a new directory iterator.
1) Constructs the end iterator.
2) Constructs a directory iterator that refers to the first directory entry of a directory identified by p. If p refers to an non-existing file or not a directory, throws std::filesystem::filesystem_error.
3) Same as (2), but if std::filesystem::directory_options::skip_permission_denied is set in options and construction encounters a permissions denied error, constructs the end iterator and does not report an error.
4) Constructs a directory iterator that refers to the first directory entry of a directory identified by p. If p refers to an non-existing file or not a directory, returns the end iterator and sets ec.
5) Same as (4), but if std::filesystem::directory_options::skip_permission_denied is set in options and construction encounters a permissions denied error, constructs the end iterator and does not report an error.

Parameters

 This section is incomplete

Exceptions

2-5) The overload that does not take a std::error_code& parameter throws filesystem_error on underlying OS API errors, constructed with p as the first path argument and the OS error code as the error code argument. The overload taking a std::error_code& parameter sets it to the OS API error code if an OS API call fails, and executes ec.clear() if no errors occur. Any overload not marked noexcept may throw std::bad_alloc if memory allocation fails.

Notes

To iterate over the current directory, construct the iterator as directory_iterator(".") instead of directory_iterator("").

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