std::filesystem::path::assign

path& assign( string_type&& source );	(1)	(since C++17)
template< class Source > path& assign( const Source& source );	(2)	(since C++17)
template< class InputIt > path& assign( InputIt first, InputIt last );	(3)	(since C++17)

Replaces the contents to the path object by a new pathname constructed from the given character sequence.

1) Assigns the pathname identified by the detected-format string source, which is left in valid, but unspecified state.

2) Assigns the pathname identified by the detected-format character range source.

3) Assigns the pathname identified by detected-format character range [first, last).

source	-	a character range to use, represented as std::string, std::string_view, pointer to a null-terminated multibyte string, or as an input iterator with char value type that points to a null-terminated multibyte string
first, last	-	a character range to use
Type requirements
- `InputIt` must meet the requirements of LegacyInputIterator.
- The value type of `InputIt` must be one of the encoded character types (char, wchar_t, char16_t and char32_t)

*this

Language
Standard Library Headers
Freestanding and hosted implementations
Named requirements
Language support library
Concepts library (C++20)
Diagnostics library
Utilities library
Strings library
Containers library
Iterators library
Ranges library (C++20)
Algorithms library
Numerics library
Input/output library
Localizations library
Regular expressions library (C++11)
Atomic operations library (C++11)
Thread support library (C++11)
Filesystem library (C++17)
Technical Specifications