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<link title="Facile" rel="Chapter" href="Facile.html"><title>Fcl_reify</title>
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<center><h1>Module <a href="type_Fcl_reify.html">Fcl_reify</a></h1></center>
<br>
<pre><span class="keyword">module</span> Fcl_reify: <code class="code">sig</code> <a href="Fcl_reify.html">..</a> <code class="code">end</code></pre>Constraints Reification<br>
<hr width="100%">
<br>
All the reification functions and operators only work on
<b>reifiable</b> constraints, i.e. constraints endowed with a <code class="code">check</code> function
<b>and</b> a <code class="code">not</code> function (or built-in constraints for which the
documentation does not mention "Not reifiable"). Otherwise a <code class="code">Failure</code>
(fatal error) exception is raised.<br>
<pre><span class="keyword">val</span> <a name="VALboolean"></a>boolean : <code class="type">?delay_on_negation:bool -> <a href="Fcl_cstr.html#TYPEt">Fcl_cstr.t</a> -> Fcl_var.Fd.t</code></pre><div class="info">
<code class="code">boolean ~delay_on_negation:true c</code> returns a boolean (0..1)
variable associated to the constraint <code class="code">c</code>. The constraint is
satisfied iff the boolean variable is instantiated to
1. Conversely, its negation is satisfied iff it is instantiated to
0. The waking conditions of the contraint relating <code class="code">c</code> and the
boolean variable are the ones set by the <code class="code">delay</code> function of <code class="code">c</code> (set by the
<code class="code">delay</code> argument of <code class="code">Cstr.create</code>). If the optional argument
<code class="code">delay_on_negation</code> is set to <code class="code">true</code>, the new constraint is also
attached to the events that awake the negation of <code class="code">c</code> (i.e. the constraint
returned by the <code class="code">not</code> function of <code class="code">c</code>), otherwise it is not.
<code class="code">delay_on_negation</code> default value is <code class="code">true</code>.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALcstr"></a>cstr : <code class="type">?delay_on_negation:bool -> <a href="Fcl_cstr.html#TYPEt">Fcl_cstr.t</a> -> Fcl_var.Fd.t -> <a href="Fcl_cstr.html#TYPEt">Fcl_cstr.t</a></code></pre><div class="info">
<code class="code">cstr ~delay_on_negation:true c b</code> is equivalent to the
constraint <code class="code">boolean ?delay_on_negation c =~ b</code>.
<code class="code">delay_on_negation</code> default value is <code class="code">true</code>.<br>
</div>
<br>
<br>
<pre><span class="keyword">val</span> <a name="VAL(&&~~)"></a>(&&~~) : <code class="type"><a href="Fcl_cstr.html#TYPEt">Fcl_cstr.t</a> -> <a href="Fcl_cstr.html#TYPEt">Fcl_cstr.t</a> -> <a href="Fcl_cstr.html#TYPEt">Fcl_cstr.t</a></code></pre><pre><span class="keyword">val</span> <a name="VAL(||~~)"></a>(||~~) : <code class="type"><a href="Fcl_cstr.html#TYPEt">Fcl_cstr.t</a> -> <a href="Fcl_cstr.html#TYPEt">Fcl_cstr.t</a> -> <a href="Fcl_cstr.html#TYPEt">Fcl_cstr.t</a></code></pre><pre><span class="keyword">val</span> <a name="VAL(=>~~)"></a>(=>~~) : <code class="type"><a href="Fcl_cstr.html#TYPEt">Fcl_cstr.t</a> -> <a href="Fcl_cstr.html#TYPEt">Fcl_cstr.t</a> -> <a href="Fcl_cstr.html#TYPEt">Fcl_cstr.t</a></code></pre><pre><span class="keyword">val</span> <a name="VAL(<=>~~)"></a>(<=>~~) : <code class="type"><a href="Fcl_cstr.html#TYPEt">Fcl_cstr.t</a> -> <a href="Fcl_cstr.html#TYPEt">Fcl_cstr.t</a> -> <a href="Fcl_cstr.html#TYPEt">Fcl_cstr.t</a></code></pre><pre><span class="keyword">val</span> <a name="VALxor"></a>xor : <code class="type"><a href="Fcl_cstr.html#TYPEt">Fcl_cstr.t</a> -> <a href="Fcl_cstr.html#TYPEt">Fcl_cstr.t</a> -> <a href="Fcl_cstr.html#TYPEt">Fcl_cstr.t</a></code></pre><pre><span class="keyword">val</span> <a name="VALnot"></a>not : <code class="type"><a href="Fcl_cstr.html#TYPEt">Fcl_cstr.t</a> -> <a href="Fcl_cstr.html#TYPEt">Fcl_cstr.t</a></code></pre><div class="info">
Logical reification operators on constraints, namely
and, or, implies, equivalent, exclusive or, not.<br>
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