std::filesystem::directory_entry::is_regular_file

 

C++

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Feature test macros (C++20)

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Concepts library (C++20)

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General utilities library

Strings library

Containers library

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Ranges library (C++20)

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Filesystem library (C++17)

Regular expressions library (C++11)

Concurrency support library (C++11)

Execution support library (C++26)

Technical specifications

Symbols index

External libraries

 

Filesystem library

Classes
filesystem::path filesystem::filesystem_error filesystem::directory_entry filesystem::directory_iterator filesystem::recursive_directory_iterator      filesystem::file_status	filesystem::space_info filesystem::file_type filesystem::perms filesystem::perm_options filesystem::copy_options filesystem::directory_options filesystem::file_time_type
Functions
filesystem::absolute filesystem::canonicalfilesystem::weakly_canonical filesystem::relativefilesystem::proximate filesystem::copy filesystem::copy_file filesystem::copy_symlink filesystem::create_directory filesystem::create_directories filesystem::create_hard_link filesystem::create_symlink filesystem::create_directory_symlink filesystem::current_path	filesystem::exists filesystem::equivalent filesystem::file_size filesystem::hard_link_count filesystem::last_write_time filesystem::permissions filesystem::read_symlink filesystem::remove filesystem::remove_all filesystem::rename filesystem::resize_file filesystem::space filesystem::status filesystem::symlink_status filesystem::temp_directory_path
File types
filesystem::is_block_file filesystem::is_character_file filesystem::is_directory filesystem::is_empty filesystem::status_known	filesystem::is_fifo filesystem::is_other filesystem::is_regular_file filesystem::is_socket filesystem::is_symlink

 

std::filesystem::directory_entry

Member functions

directory_entry::directory_entry

Modifiers

directory_entry::operator=

directory_entry::assign

directory_entry::replace_filename

directory_entry::refresh

Observers

directory_entry::pathdirectory_entry::operator const path&

directory_entry::exists

directory_entry::is_block_file

directory_entry::is_character_file

directory_entry::is_directory

directory_entry::is_fifo

directory_entry::is_other

directory_entry::is_regular_file

directory_entry::is_socket

directory_entry::is_symlink

directory_entry::file_size

directory_entry::hard_link_count

directory_entry::last_write_time

directory_entry::statusdirectory_entry::symlink_status

directory_entry::operator==directory_entry::operator!=directory_entry::operator<directory_entry::operator>directory_entry::operator<=directory_entry::operator>=directory_entry::operator<=> (until C++20)(until C++20)(until C++20)(until C++20)(until C++20)(C++20)

Non-member functions

operator<<

 

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:

1) std::filesystem::is_regular_file(status()).

2) std::filesystem::is_regular_file(status(ec)).

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

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.

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

Possible output:

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

See also

is_regular_file (C++17)

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