std::char_traits<char>::assign, std::char_traits<wchar_t>::assign, std::char_traits<char8_t>::assign, std::char_traits<char16_t>::assign, std::char_traits<char32_t>::assign

	(1)
`static void assign( char_type& c1, const char_type& c2 );`		(until C++11)
`static void assign( char_type& c1, const char_type& c2 ) noexcept;`		(since C++11) (constexpr since C++17)
`static char_type* assign( char_type* ptr, std::size_t count, char_type c2 );`	(2)	(constexpr since C++20)

1) Assigns c2 to c1, behaves identically to c1 = c2.

2) Assigns c2 to each character in count characters in the character sequence pointed to by ptr.

See CharTraits for the general requirements on character traits for X::assign.

c1	-	character to assign to
c2	-	character value to assign
ptr	-	pointer to a character sequence to assign to
count	-	the length of the character sequence

1) (none)

2) ptr

1) Constant.

2) Linear in count.

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