operator<<(std::filesystem::directory_entry)

 

C++

編譯器支援

自由（freestanding）與宿主（hosted）

語言

標準庫

標準庫標頭檔案

具名要求

特性測試宏 (C++20)

語言支援庫

概念庫 (C++20)

診斷庫

記憶體管理庫

超程式設計庫 (C++11)

通用工具庫

容器庫

迭代器庫

範圍庫 (C++20)

演算法庫

字串庫

文字處理庫

數值庫

日期和時間庫

輸入/輸出庫

檔案系統庫 (C++17)

併發支援庫 (C++11)

執行控制庫 (C++26)

技術規範

符號索引

外部庫

 

檔案系統庫

類
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::file_time_type filesystem::perms filesystem::perm_options filesystem::copy_options filesystem::directory_options
函式
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::temp_directory_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
檔案型別
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

成員函式

directory_entry::directory_entry

修改器

directory_entry::operator=

directory_entry::assign

directory_entry::replace_filename

directory_entry::refresh

觀察器

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)

非成員函式

operator<<

 

template< class CharT, class Traits > friend std::basic_ostream<CharT,Traits>&     operator<<( std::basic_ostream<CharT,Traits>& os, const directory_entry& d );		(C++17 起)

對目錄項 d 執行流輸出。等價於 return os << d.path();。

此函式模板對普通的非限定查詢或限定查詢不可見，僅當 `std::filesystem::directory_entry` 是引數的關聯類時，才能透過實參依賴查詢找到。這避免了在存在 using namespace std::filesystem; using 指令時發生不期望的轉換。

引數

os	-	要對其進行輸出的流
d	-	要插入的 directory_entry

返回值

os

異常

可能丟擲實現定義的異常。

示例

執行此程式碼

#include <filesystem>
#include <iostream>
namespace fs = std::filesystem;
 
int main()
{
    const auto entries = {fs::directory_entry{fs::current_path()},
                          fs::directory_entry{fs::temp_directory_path()}};
 
    for (const fs::directory_entry& de : entries)
        std::cout << de << '\n';
}

可能的輸出

"/home/貓"
"/tmp"

參閱

operator<<operator>> (C++17)

對帶引號的路徑執行流輸入和輸出 (函式)