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<div class="top-left">Logtalk reference manual</div> 
<div class="top-right">Built-in method: phrase/2</div>
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<h2 class="codenp">phrase/2<span id="methods_phrase2"/></h2>


<h4>Description</h4>

<pre>phrase(NonTerminal, Input)</pre>
<p>
True if the list <code>Input</code> can be parsed using the specified non-terminal <code>NonTerminal</code>. This method also accepts grammar rule bodies in the first argument (with the limitation that cuts are only supported in local calls).
</p>

<h4>Template and modes</h4>

<pre>phrase(+callable, ?list)</pre>

<h4>Errors</h4>

<dl>
	<dt>NonTerminal is a variable:</dt>
		<dd><code>instantiation_error</code></dd>
	<dt>NonTerminal is neither a variable nor a callable term:</dt>
		<dd><code>type_error(callable, NonTerminal)</code></dd>
	<dt>Input is neither a partial list nor a list:</dt>
		<dd><code>type_error(list, Input)</code></dd>
	<dt>The grammar rule non-terminal NonTerminal is private:</dt>
		<dd><code>permission_error(access, private_non_terminal, NonTerminal)</code></dd>
	<dt>The grammar rule non-terminal NonTerminal is protected:</dt>
		<dd><code>permission_error(access, protected_non_terminal, NonTerminal)</code></dd>
	<dt>The grammar rule non-terminal NonTerminal is not declared:</dt>
		<dd><code>existence_error(non_terminal_declaration, NonTerminal)</code></dd>
</dl>

<h4>Examples</h4>

<pre>| ?- sentence::phrase(sentence, [the, girl, likes, the, boy]).

yes


| ?- calculator::phrase(expr(Value), "1+2-3*4").

Value = -9
yes</pre>

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