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1 /*
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2 File: SetView.d
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3
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4 Originally written by Doug Lea and released into the public domain.
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5 Thanks for the assistance and support of Sun Microsystems Labs, Agorics
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6 Inc, Loral, and everyone contributing, testing, and using this code.
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7
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8 History:
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9 Date Who What
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10 24Sep95 dl@cs.oswego.edu Create from collections.d working file
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11
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12 */
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13
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14
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15 module tango.util.collection.model.SetView;
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16
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17 private import tango.util.collection.model.View;
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18
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19 /**
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20 * Sets provide an include operations for adding
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21 * an element only if it is not already present.
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22 * They also add a guarantee:
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23 * With sets,
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24 * you can be sure that the number of occurrences of any
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25 * element is either zero or one.
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26 *
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27 *
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28 author: Doug Lea
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29 * @version 0.93
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30 *
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31 * <P> For an introduction to this package see <A HREF="index.html"> Overview </A>.
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32 *
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33 **/
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34
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35 public interface SetView(T) : View!(T)
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36 {
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37 version (VERBOSE)
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38 {
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39 /**
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40 * Construct a new Collection that is a clone of self except
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41 * that it has indicated element. This can be used
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42 * to create a series of collections, each differing from the
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43 * other only in that they contain additional elements.
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44 *
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45 * @param element the element to include in the new collection
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46 * Returns: a new collection c, with the matches as this, except that
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47 * c.has(element)
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48 * Throws: IllegalElementException if !canInclude(element)
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49 **/
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50
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51 public Set including (T element);
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52 public alias including opCat;
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53 } // version
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54 }
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55
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