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<link title="Weak" rel="Chapter" href="Weak.html"><title>Weak.Make</title>
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<h1>Functor <a href="type_Weak.Make.html">Weak.Make</a></h1>
<pre><span id="MODULEMake"><span class="keyword">module</span> Make</span>: <div class="sig_block"><code class="code"><span class="keyword">functor</span> (</code><code class="code"><span class="constructor">H</span></code><code class="code"> : </code><code class="type"><a href="Hashtbl.HashedType.html">Hashtbl.HashedType</a></code><code class="code">) <span class="keywordsign">-></span> </code><code class="type"><a href="Weak.S.html">S</a></code><code class="type"> with type data = H.t</code></div></pre><div class="info module top">
<div class="info-desc">
<p>Functor building an implementation of the weak hash set structure.
<code class="code"><span class="constructor">H</span>.equal</code> can't be the physical equality, since only shallow
copies of the elements in the set are given to it.</p>
</div>
</div>
<table border="0" cellpadding="3" width="100%">
<tr>
<td align="left" valign="top" width="1%%"><b>Parameters: </b></td>
<td>
<table class="paramstable">
<tr>
<td align="center" valign="top" width="15%">
<code>H</code></td>
<td align="center" valign="top">:</td>
<td><code class="type"><a href="Hashtbl.HashedType.html">Hashtbl.HashedType</a></code>
</table>
</td>
</tr>
</table>
<hr width="100%">
<pre><span id="TYPEdata"><span class="keyword">type</span> <code class="type"></code>data</span> </pre>
<div class="info ">
<div class="info-desc">
<p>The type of the elements stored in the table.</p>
</div>
</div>
<pre><span id="TYPEt"><span class="keyword">type</span> <code class="type"></code>t</span> </pre>
<div class="info ">
<div class="info-desc">
<p>The type of tables that contain elements of type <code class="code">data</code>.
Note that weak hash sets cannot be marshaled using
<a href="Stdlib.html#VALoutput_value"><code class="code">output_value</code></a> or the functions of the <a href="Marshal.html"><code class="code"><span class="constructor">Marshal</span></code></a>
module.</p>
</div>
</div>
<pre><span id="VALcreate"><span class="keyword">val</span> create</span> : <code class="type">int -> <a href="Weak.S.html#TYPEt">t</a></code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">create n</code> creates a new empty weak hash set, of initial
size <code class="code">n</code>. The table will grow as needed.</p>
</div>
</div>
<pre><span id="VALclear"><span class="keyword">val</span> clear</span> : <code class="type"><a href="Weak.S.html#TYPEt">t</a> -> unit</code></pre><div class="info ">
<div class="info-desc">
<p>Remove all elements from the table.</p>
</div>
</div>
<pre><span id="VALmerge"><span class="keyword">val</span> merge</span> : <code class="type"><a href="Weak.S.html#TYPEt">t</a> -> <a href="Weak.S.html#TYPEdata">data</a> -> <a href="Weak.S.html#TYPEdata">data</a></code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">merge t x</code> returns an instance of <code class="code">x</code> found in <code class="code">t</code> if any,
or else adds <code class="code">x</code> to <code class="code">t</code> and return <code class="code">x</code>.</p>
</div>
</div>
<pre><span id="VALadd"><span class="keyword">val</span> add</span> : <code class="type"><a href="Weak.S.html#TYPEt">t</a> -> <a href="Weak.S.html#TYPEdata">data</a> -> unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">add t x</code> adds <code class="code">x</code> to <code class="code">t</code>. If there is already an instance
of <code class="code">x</code> in <code class="code">t</code>, it is unspecified which one will be
returned by subsequent calls to <code class="code">find</code> and <code class="code">merge</code>.</p>
</div>
</div>
<pre><span id="VALremove"><span class="keyword">val</span> remove</span> : <code class="type"><a href="Weak.S.html#TYPEt">t</a> -> <a href="Weak.S.html#TYPEdata">data</a> -> unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">remove t x</code> removes from <code class="code">t</code> one instance of <code class="code">x</code>. Does
nothing if there is no instance of <code class="code">x</code> in <code class="code">t</code>.</p>
</div>
</div>
<pre><span id="VALfind"><span class="keyword">val</span> find</span> : <code class="type"><a href="Weak.S.html#TYPEt">t</a> -> <a href="Weak.S.html#TYPEdata">data</a> -> <a href="Weak.S.html#TYPEdata">data</a></code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">find t x</code> returns an instance of <code class="code">x</code> found in <code class="code">t</code>.</p>
</div>
<ul class="info-attributes">
<li><b>Raises</b> <code>Not_found</code> if there is no such element.</li>
</ul>
</div>
<pre><span id="VALfind_opt"><span class="keyword">val</span> find_opt</span> : <code class="type"><a href="Weak.S.html#TYPEt">t</a> -> <a href="Weak.S.html#TYPEdata">data</a> -> <a href="Weak.S.html#TYPEdata">data</a> option</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">find_opt t x</code> returns an instance of <code class="code">x</code> found in <code class="code">t</code>
or <code class="code"><span class="constructor">None</span></code> if there is no such element.</p>
</div>
<ul class="info-attributes">
<li><b>Since</b> 4.05</li>
</ul>
</div>
<pre><span id="VALfind_all"><span class="keyword">val</span> find_all</span> : <code class="type"><a href="Weak.S.html#TYPEt">t</a> -> <a href="Weak.S.html#TYPEdata">data</a> -> <a href="Weak.S.html#TYPEdata">data</a> list</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">find_all t x</code> returns a list of all the instances of <code class="code">x</code>
found in <code class="code">t</code>.</p>
</div>
</div>
<pre><span id="VALmem"><span class="keyword">val</span> mem</span> : <code class="type"><a href="Weak.S.html#TYPEt">t</a> -> <a href="Weak.S.html#TYPEdata">data</a> -> bool</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">mem t x</code> returns <code class="code"><span class="keyword">true</span></code> if there is at least one instance
of <code class="code">x</code> in <code class="code">t</code>, false otherwise.</p>
</div>
</div>
<pre><span id="VALiter"><span class="keyword">val</span> iter</span> : <code class="type">(<a href="Weak.S.html#TYPEdata">data</a> -> unit) -> <a href="Weak.S.html#TYPEt">t</a> -> unit</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">iter f t</code> calls <code class="code">f</code> on each element of <code class="code">t</code>, in some unspecified
order. It is not specified what happens if <code class="code">f</code> tries to change
<code class="code">t</code> itself.</p>
</div>
</div>
<pre><span id="VALfold"><span class="keyword">val</span> fold</span> : <code class="type">(<a href="Weak.S.html#TYPEdata">data</a> -> 'a -> 'a) -> <a href="Weak.S.html#TYPEt">t</a> -> 'a -> 'a</code></pre><div class="info ">
<div class="info-desc">
<p><code class="code">fold f t init</code> computes <code class="code">(f d1 (... (f dN init)))</code> where
<code class="code">d1 ... dN</code> are the elements of <code class="code">t</code> in some unspecified order.
It is not specified what happens if <code class="code">f</code> tries to change <code class="code">t</code>
itself.</p>
</div>
</div>
<pre><span id="VALcount"><span class="keyword">val</span> count</span> : <code class="type"><a href="Weak.S.html#TYPEt">t</a> -> int</code></pre><div class="info ">
<div class="info-desc">
<p>Count the number of elements in the table. <code class="code">count t</code> gives the
same result as <code class="code">fold (<span class="keyword">fun</span> _ n <span class="keywordsign">-></span> n+1) t 0</code> but does not delay the
deallocation of the dead elements.</p>
</div>
</div>
<pre><span id="VALstats"><span class="keyword">val</span> stats</span> : <code class="type"><a href="Weak.S.html#TYPEt">t</a> -> int * int * int * int * int * int</code></pre><div class="info ">
<div class="info-desc">
<p>Return statistics on the table. The numbers are, in order:
table length, number of entries, sum of bucket lengths,
smallest bucket length, median bucket length, biggest bucket length.</p>
</div>
</div>
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