bool is_regular_file() const; bool is_regular_file( std::error_code& ec ) const noexcept; | (since C++17) |
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.
| ec | - | out-parameter for error reporting in the non-throwing overload |
true if the referred-to filesystem object is a regular file, false otherwise.
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.
#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"
|
(C++17) | checks whether the argument refers to a regular file (function) |
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