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IO Stream Objects

See Figure 8.18 for the derivation hierarchy of the Stream classes.

**Figure 8.18:** Stream variants
$\includegraphics{hdr/stream.ps}$

**Figure 8.19:** IO channel abstraction
$\includegraphics{hdr/socket.ps}$

See Figure 8.19 for the derivation hierarchy for IO channel abstraction.

See Figure 8.20

**Figure 8.20:** Mapper hierarchy
$\includegraphics{hdr/mapper.ps}$

Bill Pippin 2008-09-26