mirror of
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119 lines
3.5 KiB
XML
119 lines
3.5 KiB
XML
<?xml version="1.0" encoding="windows-1251"?>
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<!-- $Revision$ -->
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<!-- EN-Revision: 1.1 Maintainer: tony2001 Status: ready -->
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<sect1 id="language.function.eval">
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<title>eval</title>
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<informaltable frame="all">
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<tgroup cols="5">
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<colspec colname="param" align="center" />
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<colspec colname="type" align="center" />
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<colspec colname="required" align="center" />
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<colspec colname="default" align="center" />
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<colspec colname="desc" />
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<thead>
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<row>
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<entry>Èìÿ àòòðèáóòà</entry>
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<entry>Òèï</entry>
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<entry>Îáÿçàòåëåí</entry>
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<entry>Ïî óìîë÷àíèþ</entry>
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<entry>Îïèñàíèå</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry>var</entry>
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<entry>mixed</entry>
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<entry>Äà</entry>
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<entry><emphasis>n/a</emphasis></entry>
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<entry>Ïåðåìåííàÿ (èëè ñòðîêà) äëÿ îáðàáîòêè</entry>
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</row>
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<row>
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<entry>assign</entry>
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<entry>ñòðîêà (string)</entry>
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<entry>Íåò</entry>
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<entry><emphasis>n/a</emphasis></entry>
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<entry>Èìÿ ïåðåìåííîé, êîòîðîé áóäåò ïðèñâîåí âûâîä</entry>
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</row>
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</tbody>
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</tgroup>
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</informaltable>
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<para>
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eval èñïîëüçóåòñÿ äëÿ îáðàáîòêè ïåðåìåííîé, êàê øàáëîíà. Ìîæíî
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èñïîëüçîâàòü äëÿ òàêèõ âåùåé, êàê õðàíåíèå øàáëîííûõ
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òýãîâ/ïåðåìåííûõ â ïåðåìåííîé èëè â ôàéëàõ êîíôèãðóàöèè.
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</para>
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<para>
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Åñëè óêàçàí ñïåöèàëüíûé àòòðèáóò "assign", òî âûâîä òýãà eval
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ïðèñâàèâàåòñÿ ïåðåìåííîé, âìåñòî îòîáðàæåíèÿ.
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</para>
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<note>
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<title>Òåõíè÷åñêîå Çàìå÷àíèå</title>
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<para>
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Ïåðåìåííûå øàáëîíû îáðàáàòûâàþòñÿ òàê æå, êàê è îáû÷íûå øàáëîíû.
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Îíè ïîäâëàñòíû òåì æå ïðàâèëàì è îãðàíè÷åíèÿì áåçîïàñíîñòè.
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</para>
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</note>
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<note>
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<title>Òåõíè÷åñêîå Çàìå÷àíèå</title>
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<para>
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Ïåðåìåííûå øàáëîíû êîìïèëèðóþòñÿ ïðè êàæäîv îáðàùåíèè.
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Îòêîìïèëèðîâàííûå âåðñèè íå ñîõðàíÿþòñÿ! Îäíàêî, åñëè
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êýøèðîâàíèå âêëþ÷åíî, òî âûâîä áóäåò çàêýøèðîâàí ñ
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îñòàëüíîé ÷àñòüþ øàáëîíà.
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</para>
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</note>
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<example>
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<title>eval</title>
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<programlisting>
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setup.conf
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----------
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emphstart = <b>
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emphend = </b>
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title = Welcome to {$company}'s home page!
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ErrorCity = You must supply a {#emphstart#}city{#emphend#}.
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ErrorState = You must supply a {#emphstart#}state{#emphend#}.
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index.tpl
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---------
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{config_load file="setup.conf"}
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{eval var=$foo}
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{eval var=#title#}
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{eval var=#ErrorCity#}
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{eval var=#ErrorState# assign="state_error"}
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{$state_error}
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OUTPUT:
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This is the contents of foo.
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Welcome to Foobar Pub & Grill's home page!
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You must supply a <b>city</b>.
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You must supply a <b>state</b>.
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</programlisting>
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</example>
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</sect1>
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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:"../../../../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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