# std::filesystem::path::operator=

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< cpp‎ | filesystem‎ | path

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:

- `Source` is a specialization of std::basic_string or std::basic_string_view, or
- std::iterator_traits<std::decay_t<Source>>::value_type is valid and denotes a possibly const-qualified encoding character type (char, char8_t, (since C++20)char16_t, char32_t, or wchar_t).

### 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

Run this code

    #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

assign | assigns contents (public member function)
(constructor) | constructs a `path` (public member function)

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