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106 lines
2.4 KiB
XML
106 lines
2.4 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- EN-Revision: ec2fe9a592f794978114ef5021db9f1d00c2e05d Maintainer: daijie Status: ready -->
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<!-- CREDITS: mowangjuanzi -->
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<refentry xml:id="reflectionenum.isbacked" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
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<refnamediv>
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<refname>ReflectionEnum::isBacked</refname>
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<refpurpose>检测 Enum 是否为回退（Backed）Enum</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis role="ReflectionEnum">
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<modifier>public</modifier> <type>bool</type><methodname>ReflectionEnum::isBacked</methodname>
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<void/>
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</methodsynopsis>
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<para>
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回退 Enum 是具有本地 <type>string</type> 和 <type>int</type> 回退标量值。
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并非所有枚举都是回退的。
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</para>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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&no.function.parameters;
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<para>
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如果枚举具有回退标量，返回 &true;，否则返回 &false;。
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</para>
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</refsect1>
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<refsect1 role="examples">
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&reftitle.examples;
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<para>
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<example>
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<title><methodname>ReflectionEnum::isBacked</methodname> 示例</title>
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<programlisting role="php">
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<![CDATA[
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<?php
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enum Suit
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{
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case Hearts;
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case Diamonds;
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case Clubs;
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case Spades;
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}
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enum BackedSuit: string
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{
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case Hearts = 'H';
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case Diamonds = 'D';
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case Clubs = 'C';
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case Spades = 'S';
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}
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var_dump((new ReflectionEnum(Suit::class))->isBacked());
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var_dump((new ReflectionEnum(BackedSuit::class))->isBacked());
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?>
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]]>
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</programlisting>
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&example.outputs;
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<screen>
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<![CDATA[
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bool(false)
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bool(true)
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]]>
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</screen>
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</example>
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</para>
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</refsect1>
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<refsect1 role="seealso">
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&reftitle.seealso;
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<para>
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<simplelist>
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<member><link linkend="language.enumerations">枚举</link></member>
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<member><methodname>ReflectionEnum::getBackingType</methodname></member>
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</simplelist>
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</para>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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