NAME

std::filesystem::directory_entry::is_directory - std::filesystem::directory_entry::is_directory

Synopsis

bool is_directory() const; (since C++17)
bool is_directory( std::error_code& ec ) const noexcept;

Checks whether the pointed-to object is a directory. Effectively returns
std::filesystem::is_directory(status()) or
std::filesystem::is_directory(status(ec)), respectively.

Parameters

ec - out-parameter for error reporting in the non-throwing overload

Return value

true if the referred-to filesystem object is a directory, false otherwise.

Exceptions

The overload that does not take a std::error_code& parameter throws
filesystem::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.

Example

// Run this code

#include <iostream>
#include <filesystem>

namespace fs = std::filesystem;

int main()
{
fs::directory_entry d1(".");
fs::directory_entry d2("file.txt");
fs::directory_entry d3("new_dir");

std::cout << std::boolalpha
<< ". d1 " << d1.is_directory() << '\n'
<< "file.txt d2 " << d2.is_directory() << '\n'
// false because it has not been created
<< "new_dir d3 " << d3.is_directory() << '\n';

fs::create_directory("new_dir");

std::cout << "new_dir d3 before refresh " << d3.is_directory() << '\n';
d3.refresh();
std::cout << "new_dir d3 after refresh " << d3.is_directory() << '\n';
}

Possible output:

. d1 true
file.txt d2 false
new_dir d3 false
new_dir d3 before refresh false
new_dir d3 after refresh true