Docs4dev
Docs
cpp / latest / filesystem / path / operator=.html

std::filesystem::path::operator=

path& operator=( const path& p );
 (1) (since C++17) 
path& operator=( path&& p ) noexcept;
 (2) (since C++17) 
path& operator=( string_type&& source );
 (3) (since C++17) 
template< class Source >
path& operator=( const Source& source );
 (4) (since C++17)
1) Replaces the contents of *this with a pathname whose both native and generic format representations equal those of p.
2) Replaces the contents of *this with a pathname whose both native and generic format representations equal those of p, possibly using move semantics: p is left in a valid, but unspecified state.
3) Replaces the contents of *this with a new path value constructed from detected-format source, which is left in valid, but unspecified state. Equivalent to assign(std::move(source)).
4) Replaces the contents of *this with a new path value constructed from detected-format source as if by overload (4) of the path constructor. Equivalent to assign(source).

(4) participates in overload resolution only if Source and path are not the same type, and either:

Parameters

p - a path to assign
source - a std::basic_string, std::basic_string_view, pointer to a null-terminated character/wide character string, or an input iterator that points to a null-terminated character/wide character sequence. The character type must be one of char, char8_t, (since C++20)char16_t, char32_t, wchar_t

Return value

*this

Example

#include <filesystem>
namespace fs = std::filesystem;
 
int main()
{
    fs::path p = "C:/users/abcdef/AppData/Local";
    p = p / "Temp"; // move assignment
    const wchar_t* wstr = L"D:/猫.txt";
    p = wstr; // assignment from a source
}

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR Applied to Behavior as published Correct behavior
LWG 3244 C++17 constraint that Source cannot be path was missing added

See also

assigns contents
(public member function)
constructs a path
(public member function)

© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
https://en.cppreference.com/w/cpp/filesystem/path/operator%3D