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<div class="top-left">Logtalk reference manual</div> 
<div class="top-right">Built-in predicate: set_logtalk_flag/2</div>
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<h2 class="codenp">set_logtalk_flag/2<span id="builtins_set_logtalk_flag2"/></h2>


<h4>Description</h4>

<pre>set_logtalk_flag(Flag, Value)</pre>
<p>
	Sets Logtalk flag values.
</p>

<h4>Template and modes</h4>

<pre>set_logtalk_flag(+atom, +atom)</pre>

<h4>Errors</h4>

<dl>
	<dt>Flag is a variable:</dt>
		<dd><code>instantiation_error</code></dd>
	<dt>Value is a variable:</dt>
		<dd><code>instantiation_error</code></dd>
	<dt>Flag is not an atom:</dt>
		<dd><code>type_error(atom, Flag)</code></dd>
	<dt>Flag is neither a variable nor a valid flag:</dt>
		<dd><code>domain_error(valid_flag, Flag)</code></dd>
	<dt>Value is not a valid value for flag Flag:</dt>
		<dd><code>domain_error(valid_flag_value, Value)</code></dd>
	<dt>Flag is a read-only flag:</dt>
		<dd><code>permission_error(modify, read_only_flag, Flag)</code></dd>
</dl>

<h4>Examples</h4>

<pre>| ?- set_logtalk_flag(xml, on).</pre>

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