The position within the pushback buffer from which the next byte will be read. When the buffer is empty, <code>pos</code> is equal to <code>buf.length</code>; when the buffer is full, <code>pos</code> is equal to zero.
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The position within the pushback buffer from which the next byte will be read. When the buffer is empty, <code>pos</code> is equal to <code>buf.length</code>; when the buffer is full, <code>pos</code> is equal to zero.