NAME

std::filesystem::directory_entry::is_regular_file - std::filesystem::directory_entry::is_regular_file

Synopsis

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

Checks whether the pointed-to object is a regular file. Effectively returns
std::filesystem::is_regular_file(status()) or
std::filesystem::is_regular_file(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 regular file, 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 <filesystem>
#include <iostream>
#include <string>

namespace fs = std::filesystem;

int main(int argc, const char* argv[])
{
// Print out all regular files in a directory 'dir'.
try {
const auto dir = argc == 2
? fs::path{ argv[1] }
: fs::current_path();

std::cout << "Current dir: " << dir << '\n'
<< std::string(40, '-') << '\n';

for (fs::directory_entry const& entry : fs::directory_iterator(dir)) {
if (entry.is_regular_file()) {
std::cout << entry.path().filename() << '\n';
}
}
} catch(fs::filesystem_error const& e) {
std::cout << e.what() << '\n';
}
}

Possible output:

Current dir: "/tmp/1588616534.9884143"
----------------------------------------
"main.cpp"
"a.out"