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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="generator.throw" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>Generator::throw</refname>
<refpurpose>Throw an exception into the generator</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis role="Generator">
<modifier>public</modifier> <type>mixed</type><methodname>Generator::throw</methodname>
<methodparam><type>Throwable</type><parameter>exception</parameter></methodparam>
</methodsynopsis>
<para>
Throws an exception into the generator and resumes execution of the generator.
The behavior will be the same as if the current &yield; expression was replaced with
a <literal>throw $exception</literal> statement.
</para>
<para>
If the generator is already closed when this method is invoked, the exception will
be thrown in the caller's context instead.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<variablelist>
<varlistentry>
<term><parameter>exception</parameter></term>
<listitem>
<para>
Exception to throw into the generator.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns the yielded value.
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>Throwing an exception into a generator</title>
<programlisting role="php">
<![CDATA[
<?php
function gen() {
echo "Foo\n";
try {
yield;
} catch (Exception $e) {
echo "Exception: {$e->getMessage()}\n";
}
echo "Bar\n";
}
$gen = gen();
$gen->rewind();
$gen->throw(new Exception('Test'));
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
Foo
Exception: Test
Bar
]]>
</screen>
</example>
</para>
</refsect1>
</refentry>
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sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
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sgml-parent-document:nil
sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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End:
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vim: et tw=78 syn=sgml
vi: ts=1 sw=1
-->
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