File: SAFE_EQUAL.html

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<!DOCTYPE HTML SYSTEM>
<!-- Generated by Lisaac shorter / html style -->
<html>
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<title>
Lisaac prototype interface
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<body BGCOLOR="#FFFFFF">

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
<br><br><strong><font color="#A020F0">Section</font></strong> <strong><font color="#A020F0">Header</font></strong>
  
  <br><br><strong><font color="#FF0000">&nbsp &nbsp +</font></strong> <strong><font color="#0000FF">name</font></strong>    := <a href="SAFE_EQUAL.html"><font color="#008000">SAFE_EQUAL</font></a>[<font color="#008000">E</font>];
  
  <br><br><strong><font color="#FF0000">&nbsp &nbsp -</font></strong> <strong><font color="#0000FF">comment</font></strong> :=<font color="#BC8F8F">"The goal of this class is to share the definition of \
              \feature `safe_equal'. Feature `safe_equal' compares  \
              \two arguments of type E, by calling `==' only  \
              \and only if both arguments have the `same_type'.."</font>;
    
<br><br><strong><font color="#A020F0">Section</font></strong> <strong><font color="#A020F0">Inherit</font></strong>
  
  <br><br><strong><font color="#FF0000">&nbsp &nbsp -</font></strong> <strong><font color="#0000FF">parent</font></strong>:<a href="OBJECT.html"><font color="#008000">OBJECT</font></a> := 
  
<br><br><strong><font color="#A020F0">Section</font></strong> <strong><font color="#A020F0">Public</font></strong>
  
  <br><br><strong><font color="#FF0000">&nbsp &nbsp -</font></strong> <strong><font color="#0000FF">safe_equal</font></strong> (e1, e2:<font color="#008000">E</font>) :<a href="BOOLEAN.html"><font color="#008000">BOOLEAN</font></a> <-
  <br><em><strong><font color="#707070">&nbsp &nbsp &nbsp &nbsp  In order to avoid run-time type errors, feature `safe_equal' call</font></strong></em>
  <br><em><strong><font color="#707070">&nbsp &nbsp &nbsp &nbsp  `==' only when `e1' and `e2' have exactly the same `generating_type'.</font></strong></em>
  <br><em><strong><font color="#707070">&nbsp &nbsp &nbsp &nbsp  Furthermore, this feature avoid argument passing from some</font></strong></em>
  <br><em><strong><font color="#707070">&nbsp &nbsp &nbsp &nbsp  expanded type to the corresponding reference type (no automatic</font></strong></em>
  <br><em><strong><font color="#707070">&nbsp &nbsp &nbsp &nbsp  allocation of some reference type during the comparison).</font></strong></em>
    

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