Append the specified character to the internal buffer, or do nothing if traits_type::eof() is passed.
character
traits_type::eof()
Declared in <bslstl_syncbuf.h>
<bslstl_syncbuf.h>
basic_syncbuf<CHAR, TRAITS, ALLOCATOR>::int_type overflow(int_type character = traits_type::eof()) override;