queue.sa


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-- Copyright (C) 2000 by K Hopper, University of Waikato, New Zealand        --
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abstract class $QUEUE{ETP} < $DISPENSER{ETP}

abstract class $QUEUE{ETP} < $DISPENSER{ETP} is -- This abstract class specifies the queue abstraction. -- Version 1.3 Dec 2000. Copyright K Hopper, U of Waikato -- Development History -- ------------------- -- Date Who By Detail -- ---- ------ ------ -- 1 Jun 96 bg Original -- 16 Jul 96 hk Adapted for Sather 1.1 -- 4 Apr 97 kh Changed for style conformity -- 5 Dec 00 kh Simplified inheritance top : ETP ; -- This routine returns the topmost element (which is an alias for the -- current element). enq( elem : ETP ) ; -- This routine puts elem at the end of the queue. end ; -- $QUEUE{ETP}