运算符<<,>>(std::experimental::filesystem::path)

 

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)

并行性扩展 (parallelism TS)

并行性扩展 2 (parallelism TS v2)

并发性扩展 (concurrency TS)

并发性扩展 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::append运算符 /= path::concat运算符 += path::clear path::make_preferred path::remove_filename path::replace_filename path::replace_extension path::swap path::compare	path::c_strpath::native运算符 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)
运算符==运算符!=运算符<运算符<=运算符>运算符>=
运算符/
运算符<<运算符>>
u8path

 

template< class CharT, class Traits > std::basic_ostream<CharT,Traits>&     operator<<( std::basic_ostream<CharT,Traits>& os, const path& p );	(1)	(filesystem TS)
template< class CharT, class Traits > std::basic_istream<CharT,Traits>&     operator>>( std::basic_istream<CharT,Traits>& is, path& p );	(2)	(filesystem TS)

对路径 p 执行流输入或输出。std::quoted 被使用，以便空格不会在稍后被流输入运算符读取时导致截断。

参数

os	-	执行输出的流
is	-	执行输入的流
p	-	要插入或提取的路径

返回值

1) os

2) is

异常

可能抛出实现定义的异常。

可能的实现

第一版本
template<class CharT, class Traits> std::basic_ostream<CharT,Traits>& operator<<(std::basic_ostream<CharT,Traits>& os, const path& p) { os << std::quoted(p.string<CharT,Traits>()); return os; }
第二版本
template<class CharT, class Traits> std::basic_istream<CharT,Traits>& operator>>(std::basic_istream<CharT,Traits>& is, path& p) { std::basic_string<CharT, Traits> t; is >> std::quoted(t); p = t; return is; }