Tools.h++ Manual

8-2 104011 Tandem Computers Incorporated
8
The Tools.h++ “virtual streams” overcomes these limitations by offering an
idealized model of a stream. No assumptions are made about formatting, or
stream models. At the bottom of the virtual streams class hierarchy is class
RWvios . This is an abstract base class with an interface very similar to the
standard library class ios :
Specializing versions of RWvios will supply definitions for these functions.
class RWvios
{
public:
virtual int eof() = 0;
virtual int fail() = 0;
virtual int bad() = 0;
virtual int good() = 0;
virtual int rdstate() = 0;
virtual int clear(int v = 0) = 0;
};