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<link title="Weak" rel="Chapter" href="Weak.html"><title>Obj</title>
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<h1>Module <a href="type_Obj.html">Obj</a></h1>
<pre><span id="MODULEObj"><span class="keyword">module</span> Obj</span>: <code class="code"><span class="keyword">sig</span></code> <a href="Obj.html">..</a> <code class="code"><span class="keyword">end</span></code></pre><div class="info module top">
<div class="info-desc">
<p>Operations on internal representations of values.</p>
<p>Not for the casual user.</p>
</div>
</div>
<hr width="100%">
<pre><span id="TYPEt"><span class="keyword">type</span> <code class="type"></code>t</span> </pre>
<pre><span id="VALrepr"><span class="keyword">val</span> repr</span> : <code class="type">'a -> <a href="Obj.html#TYPEt">t</a></code></pre>
<pre><span id="VALobj"><span class="keyword">val</span> obj</span> : <code class="type"><a href="Obj.html#TYPEt">t</a> -> 'a</code></pre>
<pre><span id="VALmagic"><span class="keyword">val</span> magic</span> : <code class="type">'a -> 'b</code></pre>
<pre><span id="VALis_block"><span class="keyword">val</span> is_block</span> : <code class="type"><a href="Obj.html#TYPEt">t</a> -> bool</code></pre>
<pre><span id="VALis_int"><span class="keyword">val</span> is_int</span> : <code class="type"><a href="Obj.html#TYPEt">t</a> -> bool</code></pre>
<pre><span id="VALtag"><span class="keyword">val</span> tag</span> : <code class="type"><a href="Obj.html#TYPEt">t</a> -> int</code></pre>
<pre><span id="VALsize"><span class="keyword">val</span> size</span> : <code class="type"><a href="Obj.html#TYPEt">t</a> -> int</code></pre>
<pre><span id="VALreachable_words"><span class="keyword">val</span> reachable_words</span> : <code class="type"><a href="Obj.html#TYPEt">t</a> -> int</code></pre><div class="info ">
<div class="info-desc">
<p>Computes the total size (in words, including the headers) of all
heap blocks accessible from the argument. Statically
allocated blocks are excluded.</p>
<p>@Since 4.04</p>
</div>
</div>
<pre><span id="VALfield"><span class="keyword">val</span> field</span> : <code class="type"><a href="Obj.html#TYPEt">t</a> -> int -> <a href="Obj.html#TYPEt">t</a></code></pre>
<pre><span id="VALset_field"><span class="keyword">val</span> set_field</span> : <code class="type"><a href="Obj.html#TYPEt">t</a> -> int -> <a href="Obj.html#TYPEt">t</a> -> unit</code></pre><div class="info ">
<div class="info-desc">
<p>When using flambda:</p>
<p><code class="code">set_field</code> MUST NOT be called on immutable blocks. (Blocks allocated
in C stubs, or with <code class="code">new_block</code> below, are always considered mutable.)</p>
<p>The same goes for <code class="code">set_double_field</code> and <code class="code">set_tag</code>. However, for
<code class="code">set_tag</code>, in the case of immutable blocks where the middle-end optimizers
never see code that discriminates on their tag (for example records), the
operation should be safe. Such uses are nonetheless discouraged.</p>
<p>For experts only:
<code class="code">set_field</code> et al can be made safe by first wrapping the block in
<a href="Sys.html#VALopaque_identity"><code class="code"><span class="constructor">Sys</span>.opaque_identity</code></a>, so any information about its contents will not
be propagated.</p>
</div>
</div>
<pre><span id="VALset_tag"><span class="keyword">val</span> set_tag</span> : <code class="type"><a href="Obj.html#TYPEt">t</a> -> int -> unit</code></pre>
<pre><span id="VALdouble_field"><span class="keyword">val</span> double_field</span> : <code class="type"><a href="Obj.html#TYPEt">t</a> -> int -> float</code></pre>
<pre><span id="VALset_double_field"><span class="keyword">val</span> set_double_field</span> : <code class="type"><a href="Obj.html#TYPEt">t</a> -> int -> float -> unit</code></pre>
<pre><span id="VALnew_block"><span class="keyword">val</span> new_block</span> : <code class="type">int -> int -> <a href="Obj.html#TYPEt">t</a></code></pre>
<pre><span id="VALdup"><span class="keyword">val</span> dup</span> : <code class="type"><a href="Obj.html#TYPEt">t</a> -> <a href="Obj.html#TYPEt">t</a></code></pre>
<pre><span id="VALtruncate"><span class="keyword">val</span> truncate</span> : <code class="type"><a href="Obj.html#TYPEt">t</a> -> int -> unit</code></pre>
<pre><span id="VALadd_offset"><span class="keyword">val</span> add_offset</span> : <code class="type"><a href="Obj.html#TYPEt">t</a> -> <a href="Int32.html#TYPEt">Int32.t</a> -> <a href="Obj.html#TYPEt">t</a></code></pre>
<pre><span id="VALfirst_non_constant_constructor_tag"><span class="keyword">val</span> first_non_constant_constructor_tag</span> : <code class="type">int</code></pre>
<pre><span id="VALlast_non_constant_constructor_tag"><span class="keyword">val</span> last_non_constant_constructor_tag</span> : <code class="type">int</code></pre>
<pre><span id="VALlazy_tag"><span class="keyword">val</span> lazy_tag</span> : <code class="type">int</code></pre>
<pre><span id="VALclosure_tag"><span class="keyword">val</span> closure_tag</span> : <code class="type">int</code></pre>
<pre><span id="VALobject_tag"><span class="keyword">val</span> object_tag</span> : <code class="type">int</code></pre>
<pre><span id="VALinfix_tag"><span class="keyword">val</span> infix_tag</span> : <code class="type">int</code></pre>
<pre><span id="VALforward_tag"><span class="keyword">val</span> forward_tag</span> : <code class="type">int</code></pre>
<pre><span id="VALno_scan_tag"><span class="keyword">val</span> no_scan_tag</span> : <code class="type">int</code></pre>
<pre><span id="VALabstract_tag"><span class="keyword">val</span> abstract_tag</span> : <code class="type">int</code></pre>
<pre><span id="VALstring_tag"><span class="keyword">val</span> string_tag</span> : <code class="type">int</code></pre>
<pre><span id="VALdouble_tag"><span class="keyword">val</span> double_tag</span> : <code class="type">int</code></pre>
<pre><span id="VALdouble_array_tag"><span class="keyword">val</span> double_array_tag</span> : <code class="type">int</code></pre>
<pre><span id="VALcustom_tag"><span class="keyword">val</span> custom_tag</span> : <code class="type">int</code></pre>
<pre><span id="VALfinal_tag"><span class="keyword">val</span> final_tag</span> : <code class="type">int</code></pre>
<pre><span id="VALint_tag"><span class="keyword">val</span> int_tag</span> : <code class="type">int</code></pre>
<pre><span id="VALout_of_heap_tag"><span class="keyword">val</span> out_of_heap_tag</span> : <code class="type">int</code></pre>
<pre><span id="VALunaligned_tag"><span class="keyword">val</span> unaligned_tag</span> : <code class="type">int</code></pre>
<pre><span id="VALextension_constructor"><span class="keyword">val</span> extension_constructor</span> : <code class="type">'a -> extension_constructor</code></pre>
<pre><span id="VALextension_name"><span class="keyword">val</span> extension_name</span> : <code class="type">extension_constructor -> string</code></pre>
<pre><span id="VALextension_id"><span class="keyword">val</span> extension_id</span> : <code class="type">extension_constructor -> int</code></pre><p>The following two functions are deprecated. Use module <a href="Marshal.html"><code class="code"><span class="constructor">Marshal</span></code></a>
instead.</p>
<pre><span id="VALmarshal"><span class="keyword">val</span> marshal</span> : <code class="type"><a href="Obj.html#TYPEt">t</a> -> bytes</code></pre>
<pre><span id="VALunmarshal"><span class="keyword">val</span> unmarshal</span> : <code class="type">bytes -> int -> <a href="Obj.html#TYPEt">t</a> * int</code></pre>
<pre><span id="MODULEEphemeron"><span class="keyword">module</span> <a href="Obj.Ephemeron.html">Ephemeron</a></span>: <code class="code"><span class="keyword">sig</span></code> <a href="Obj.Ephemeron.html">..</a> <code class="code"><span class="keyword">end</span></code></pre></body></html>
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