help/info/isbound.html

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  18 <title>isbound</title>
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  37 <h1>isbound</h1>
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  39 <p>This function returns the value <b><font face="Courier New">true</font></b> if and only if the template parameter is completely initialized, thus, contains only concrete or omitted values,
  40 with the following exception: isbound returns true for a record-of value which contains both bound and unbound elements, whereas <a href="isvalue.html">isvalue</a> returns false.
  41 <hr align="left" width="50%">
  42 <p>Related keyword:</p>
  43 <ul>
  44   <li><b><font face="Courier New" size="4" color="#003258"> <a href="boolean.html">boolean</a></font></b></li>
  45   <li><b><a href="true.html"><font face="Courier New" size="4" color="#003258"> true</font></a></b></li>
  46   <li><b><font face="Courier New" size="4" color="#003258"><a href="false.html"> false</a></font></b></li>
  47   <li><b><font face="Courier New" size="4" color="#003258"> <a href="template.html">template</a></font></b></li>
  48   <li><b><font face="Courier New" size="4" color="#003258"> <a href="omit.html">omit</a></font></b></li>
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  54   <tr>
  55     <td width="100%">
  56     <h3 align="center"><font face="Courier New" color="#003258" size="5"><b>isbound</b></font> <font face="Courier New" color="#003258" size="5"><b> (</b></font><i>in template any_type
  57     inparameter</i><font face="Courier New" color="#003258" size="5"><b>)return boolean</b></font></h3>
  58     </td>
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  60 </table>
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  63 <hr align="left" width="25%">
  64 <p>Example 1:</p>
  65 <p><font face="Courier New">type record&nbsp; MyRecordType {&nbsp;<br>
  66 &nbsp;&nbsp;&nbsp;integer field1 optional,<br>
  67 &nbsp;&nbsp;&nbsp;integer field2 optional<br>
  68 }<br>
  69 ...</font></p>
  70 <p><font face="Courier New">var MyRecordType v_MyRecord;<br>
  71 var template MyRecordType vt_MyRecordTemplate;<br>
  72 ...</font></p>
  73 <p><font face="Courier New">isbound(v_MyRecord); // return false<br>
  74 isbound(vt_MyRecordTemplate); // return false<br>
  75 ...</font></p>
  76 <p><font face="Courier New">v_MyRecord := { field1 := 5, field2 := omit}<br>
  77 vt_MyRecordTemplate := { field1 := ?, field2 := 5}<br>
  78 ...</font></p>
  79 <p><font face="Courier New">isbound(v_MyRecord); // return true<br>
  80 isbound(v_MyRecord.field2); // return false<br>
  81 isbound(vt_MyRecordTemplate); // return false<br>
  82 isbound(vt_MyRecordTemplate.field1); // return false<br>
  83 isbound(vt_MyRecordTemplate.field2); // return true<br>
  84 </font></p>
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