protected virtual member function
basic_streambuf* setbuf (char_type* s, streamsize n);
- s, n
- Arguments that may be used by overriding functions in derived classes.
Member type char_type is the type of the characters in the stream buffer (the first class template parameter).
streamsize is a signed integral type.
Introduces no data races, but overriden versions in derived classes may.
No-throw guarantee: this default definition never throws exceptions.