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<h1>permutation</h1>
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<p>The keyword is only used in conjunction with <font face="Courier New"><b>template</b></font> definition. It denotes the inside matching mechanism where the incoming field contains exactly those
elements that appear in the value list of permutation but in any order. It is applicable inside of <font face="Courier New" size="4"><b>record</b></font> <font face="Courier New" size="4"><b>of</b></font>
templates or template fields only (i.e. within the pair of {}-s of the record of).
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<p>Related keyword:</p>
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<li><a href="template.html"><b><font face="Courier New" color="#003258" size="4">template</font></b></a></li>
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<h3 align="center"><font face="Courier New" color="#003258" size="5"><b>permutation(</b></font><i>value_list</i><font face="Courier New" color="#003258" size="5"><b>)</b></font></h3>
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<p><i>value_list</i> is a comma separated list containing all the values that are permitted for the concerned field.
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<p>Example:
<p><code> type record of integer ROI; template ROI tr_OneTwoThree := { permutation ( 1, 2, 3 ) }; </code>
<p>Template tr_OneTwoThree matches all three integers long ROI values that contain the numbers one, two and three in any order. <br>
These is a total of 3! = 6 different matching value lists:
<p><code>{ 1, 2, 3 } <br>
{ 1, 3, 2 } <br>
{ 2, 1, 3 } <br>
{ 2, 3, 1 } <br>
{ 3, 1, 2 } <br>
{ 3, 2, 1 } </code>
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<p><a HREF="BNF.html#permutationmatch">BNF definition</a> of <font face="Courier New">permutation</font></p>
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