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href="Tk.html"> <link title="Unix" rel="Chapter" href="Unix.html"> <link title="UnixLabels" rel="Chapter" href="UnixLabels.html"> <link title="Weak" rel="Chapter" href="Weak.html"><title>Oo</title> </head> <body> <div class="navbar"><a class="pre" href="Obj.html" title="Obj">Previous</a> <a class="up" href="index.html" title="Index">Up</a> <a class="post" href="Parsing.html" title="Parsing">Next</a> </div> <h1>Module <a href="type_Oo.html">Oo</a></h1> <pre><span class="keyword">module</span> Oo: <code class="code"><span class="keyword">sig</span></code> <a href="Oo.html">..</a> <code class="code"><span class="keyword">end</span></code></pre><div class="info module top"> Operations on objects<br> </div> <hr width="100%"> <pre><span id="VALcopy"><span class="keyword">val</span> copy</span> : <code class="type">(< .. > as 'a) -> 'a</code></pre><div class="info "> <code class="code"><span class="constructor">Oo</span>.copy o</code> returns a copy of object <code class="code">o</code>, that is a fresh object with the same methods and instance variables as <code class="code">o</code>.<br> </div> <pre><span id="VALid"><span class="keyword">val</span> id</span> : <code class="type">< .. > -> int</code></pre><div class="info "> Return an integer identifying this object, unique for the current execution of the program. The generic comparison and hashing functions are based on this integer. When an object is obtained by unmarshaling, the id is refreshed, and thus different from the original object. As a consequence, the internal invariants of data structures such as hash table or sets containing objects are broken after unmarshaling the data structures.<br> </div> </body></html>