std::filesystem::operator/(std::filesystem::path)

 

C++

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自立实现与有宿主实现

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具名要求

功能特性测试宏 (C++20)

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文件系统库 (C++17)

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技术规范

符号索引

外部库

 

文件系统库

类
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
函数
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
文件类型
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::path

常量
path::native_formatpath::generic_formatpath::auto_format
成员函数
path::path path::~path path::operator= path::assign path::appendpath::operator/= path::concatpath::operator+= path::clear path::make_preferred path::remove_filename path::replace_filename path::replace_extension      path::swap path::compare path::beginpath::end	path::c_strpath::nativepath::operator string_type path::stringpath::u8stringpath::u16stringpath::u32stringpath::wstring path::generic_stringpath::generic_u8stringpath::generic_u16stringpath::generic_u32stringpath::generic_wstring path::lexically_normalpath::lexically_relativepath::lexically_proximate
路径分解
path::root_name path::root_directory path::root_path path::relative_path path::parent_path path::filename path::stem path::extension path::empty	path::has_root_pathpath::has_root_namepath::has_root_directorypath::has_relative_pathpath::has_parent_pathpath::has_filenamepath::has_stempath::has_extension path::is_absolutepath::is_relative
非成员函数
operator==operator!=operator<operator<=operator>operator>=operator<=> (C++20 前)(C++20 前)(C++20 前)(C++20 前)(C++20 前)(C++20)	operator/ operator<<operator>> swap(std::filesystem::path) hash_value u8path
辅助类
hash<std::filesystem::path>
formatter<std::filesystem::path> (C++26)

 

friend path operator/( const path& lhs, const path& rhs );		(C++17 起)

若适合（细节见 operator/=），则以偏好目录分隔符连接两个路径组分。

等效于返回 path(lhs) /= rhs。

此函数对常规的无限定或有限定查找不可见，而只能在 std::filesystem::path 为实参的关联类时由实参依赖查找找到。这阻止存在 using namespace std::filesystem; using 指令情况下的不想要的转换。

参数

lhs, rhs

-

要连接的路径

返回值

路径连接的结果。

示例

运行此代码

#include <filesystem>
#include <iostream>
 
int main()
{
#   if defined(_WIN32) // see e.g. stackoverflow.com/questions/142508
 
    std::filesystem::path p = "C:";
 
    std::cout << "\"C:\" / \"Users\" / \"batman\" == " << p / "Users" / "batman" << '\n';
 
#   else // __linux__ etc
 
    std::filesystem::path p = "/home";
 
    std::cout << "\"/home\" / \"tux\" / \".fonts\" == " << p / "tux" / ".fonts" << '\n';
 
#   endif
}

可能的输出：

Windows specific output:
"C:" / "Users" / "batman" == "C:Users\\batman"
 
Linux etc specific output:
"/home" / "tux" / ".fonts" == "/home/tux/.fonts"

缺陷报告

下列更改行为的缺陷报告追溯地应用于以前出版的 C++ 标准。

缺陷报告	应用于	出版时的行为	正确行为
LWG 3065	C++17	允许存在 using 指令的情况下连接一切可转换成 path 的值	使之为隐藏友元

参阅

appendoperator/=

以目录分隔符向路径添加元素 (公开成员函数)