std::experimental::filesystem::path::string,wstring,u8string,...

 

C++

编译器支持

独立式和宿主式

语言

标准库

标准库头文件

具名要求

特性测试宏 (C++20)

语言支持库

概念库 (C++20)

诊断库

内存管理库

元编程库 (C++11)

通用工具库

容器库

迭代器库

范围库 (C++20)

算法库

字符串库

文本处理库

数值库

日期和时间库

输入/输出库

文件系统库 (C++17)

并发支持库 (C++11)

执行控制库 (C++26)

技术规范

符号索引

外部库

 

实验性

技术规范

文件系统库 (filesystem TS)

库基础 (library fundamentals TS)

库基础 2 (library fundamentals TS v2)

库基础 3 (library fundamentals TS v3)

并行扩展 (parallelism TS)

并行扩展 2 (parallelism TS v2)

并发扩展 (concurrency TS)

并发扩展 2 (concurrency TS v2)

概念 (concepts TS)

范围 (ranges TS)

反射 (reflection TS)

数学特殊函数 (special functions TR)

实验性非TS

模式匹配

线性代数

std::execution

契约

2D图形

 

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::copy_options filesystem::directory_options filesystem::file_time_type
函数
filesystem::absolute filesystem::system_complete filesystem::canonical 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

 

path

成员函数
path::path path::~path path::operator= path::assign path::appendoperator /= path::concatoperator += path::clear path::make_preferred path::remove_filename path::replace_filename path::replace_extension path::swap path::compare	path::c_strpath::nativeoperator string_type path::stringpath::u8stringpath::u16stringpath::u32stringpath::wstring path::generic_stringpath::generic_u8stringpath::generic_u16stringpath::generic_u32stringpath::generic_wstring path::beginpath::end
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
swap(path)
operator==operator!=operator<operator<=operator>operator>=
operator/
operator<<operator>>
u8path

 

template< class CharT, class Traits = std::char_traits<CharT>,           class Alloc = std::allocator<CharT> > std::basic_string<CharT,Traits,Alloc>     string( const Alloc& a = Alloc() ) const;	(1)	(filesystem TS)
	(2)	(filesystem TS)
std::string string() const;
std::wstring wstring() const;
std::string u8string() const;
std::u16string u16string() const;
std::u32string u32string() const;

以特定字符串类型返回本机路径名格式的内部路径名。如有转换，将在todo中指定。

1) 所有内存分配均由 a 执行。

2) 在 u8string() 的情况下，编码始终为 UTF-8。

参数

(无)

返回值

本机路径名格式的内部路径名，转换为指定的字符串类型。

异常

可能抛出实现定义的异常。

示例

运行此代码

#include <clocale>
#include <cstdio>
#include <experimental/filesystem>
#include <fstream>
#include <iostream>
namespace fs = std::experimental::filesystem;
 
int main()
{
    std::setlocale(LC_ALL, "en_US.utf8");
    std::locale::global(std::locale("en_US.utf8"));
 
    fs::path p = fs::u8path(u8"要らない.txt");
 
    // native string representation can be used with OS APIs
    std::ofstream(p) << "File contents"; // this uses operator string()
    if (std::FILE* f = std::fopen(p.c_str(), "r"))
    {
        int ch;
        while ((ch=fgetc(f))!= EOF) putchar(ch);
        std::fclose(f);
    }
 
    // multibyte and wide representation can be used for output
    std::cout.imbue(std::locale());
    std::cout << "\nFile name in narrow multibyte encoding: "
              << p.string() << '\n';
 
    std::wcerr.imbue(std::locale());
    std::wcerr << "File name in wide encoding: "
               << p.wstring() << '\n';
 
    fs::remove(p);
}

可能的输出

File contents
File name in narrow multibyte encoding: 要らない.txt
File name in wide encoding: 要らない.txt

参见

generic_stringgeneric_wstringgeneric_u8stringgeneric_u16stringgeneric_u32string

返回转换为字符串的通用路径名格式的路径 (公共成员函数)