u32string
A type that describes a specialization of the template class basic_string with elements of type char32_t.
Other typedefs that specialize basic_string include string, u16string, and wstring.
typedef basic_string<char32_t, char_traits<char32_t>, allocator<char32_t>> u32string;
Remarks
For a list of string constructors, see basic_string::basic_string.
Requirements
Header: <string>
Namespace: std