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

Checks whether the pointed-to object is a regular file. Effectively returns:


[edit] Parameters

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

[edit] Return value

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

[edit] 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 p as the first path argument and 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.

[edit] Example

#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'.
        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(const fs::filesystem_error& e)
        std::cout << e.what() << '\n';

Possible output:

Current dir: "/tmp/1588616534.9884143"

[edit] See also

checks whether the argument refers to a regular file
(function) [edit]