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		<title>Logtalk built-in method: forall/2</title>
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<div class="top-left">Logtalk reference manual</div> 
<div class="top-right">Built-in method: forall/2</div>
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<h2 class="code">forall/2</h2>


<h4>Description</h4>

<pre>forall(Generator, Test)</pre>
<p>
	For all solutions of <code>Generator</code>, <code>Test</code> is true.
</p>

<h4>Template and modes</h4>

<pre>forall(+callable, +callable)</pre>

<h4>Errors</h4>

<dl class="errors">
	<dt>Either Generator or Test is a variable:</dt>
		<dd><code>instantiation_error</code></dd>
	<dt>Generator is neither a variable nor a callable term:</dt>
		<dd><code>type_error(callable, Generator)</code></dd>
	<dt>Test is neither a variable nor a callable term:</dt>
		<dd><code>type_error(callable, Test)</code></dd>
</dl>

<h4>Examples</h4>

<dl class="examples">
	<dt>To call both goals in <a class="glossary" title="Go to glossary definition" href="../../glossary.html#this">this</a>:</dt>
		<dd><code>forall(Generator, Test)</code></dd>
	<dt>To call both goals in <a class="glossary" title="Go to glossary definition" href="../../glossary.html#self">self</a>:</dt>
		<dd><code>forall(::Generator, ::Test)</code></dd>
	<dt>To call both goals in an object:</dt>
		<dd><code>forall(Object::Generator, Object::Test)</code></dd>
</dl>

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		<span class="date">Last updated on: November 16, 2005</span>
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