std::filesystem::directory_entry::is_regular_file
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< cpp | filesystem | directory entry
C++
Feature test macros (C++20)
Concepts library (C++20)
Metaprogramming library (C++11)
Ranges library (C++20)
Filesystem library (C++17)
Concurrency support library (C++11)
Execution control library (C++26)
std::filesystem::directory_entry
Member functions
Modifiers
Observers
directory_entry::is_regular_file
(until C++20)(until C++20)(until C++20)(until C++20)(until C++20)(C++20)
Non-member functions
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)).
[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
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"