31 Input/output library [input.output]

31.12 File systems [filesystems]

31.12.13 Filesystem operation functions [fs.op.funcs]

31.12.13.8 Create directory [fs.op.create.directory]

bool filesystem::create_directory(const path& p);
bool filesystem::create_directory(const path& p, error_code& ec) noexcept;

Effects: Creates the directory p resolves to, as if by POSIX mkdir with a second argument of static_cast<int>(perms::all).

If mkdir fails because p resolves to an existing directory, no error is reported.

Otherwise on failure an error is reported.

Returns: true if a new directory was created, otherwise false.

Throws: As specified in [fs.err.report].

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bool filesystem::create_directory(const path& p, const path& existing_p);
bool filesystem::create_directory(const path& p, const path& existing_p, error_code& ec) noexcept;

Effects: Creates the directory p resolves to, with attributes copied from directory existing_p.

The set of attributes copied is operating system dependent.

If mkdir fails because p resolves to an existing directory, no error is reported.

Otherwise on failure an error is reported.

[Note 1:

For POSIX-based operating systems, the attributes are those copied by native API stat(existing_p.c_str(), &attributes_stat) followed by mkdir(p.c_str(), attributes_stat.st_mode).

For Windows-based operating systems, the attributes are those copied by native API CreateDirectoryExW(existing_p.c_str(), p.c_str(), 0).

— end note]

Returns: true if a new directory was created with attributes copied from directory existing_p, otherwise false.

Throws: As specified in [fs.err.report].