Annex D (normative) Compatibility features [depr]

D.7 char* streams [depr.str.strstreams]

D.7.2 Class istrstream [depr.istrstream]

D.7.2.2 Member functions [depr.istrstream.members]

strstreambuf* rdbuf() const;

Returns: const_cast<strstreambuf*>(&sb).

char* str();

Returns: rdbuf()->str().