./devel/ruby-stream, Interface for external iterators

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Branch: pkgsrc-2017Q2, Version: 0.5nb2, Package name: ruby23-stream-0.5nb2, Maintainer: minskim

Module Stream defines an interface for external iterators. A stream
can be seen as an iterator on a sequence of objects x1, ..., xn. The
state of the stream is uniquely determined by the following methods:
at_beginning?, at_end?, current, and peek. State changes are done
with the following operations: set_to_begin, set_to_end, forward, and
backward.

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