36 lines
1.3 KiB
HTML
36 lines
1.3 KiB
HTML
<html>
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<head>
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<object type="application/x-oleobject" classid="clsid:1e2a7bd0-dab9-11d0-b93a-00c04fc99f9e">
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<param name="Keyword" value="Àâòîêëàññû">
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<param name="Keyword" value="auto">
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</object>
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<meta http-equiv="Content-Type" content="text/html; charset=windows-1251">
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<title></title>
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<link rel="StyleSheet" href="../../default.css">
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<style type="text/css">
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.auto-style1 {
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font-family: monospace;
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font-size: 10pt;
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color: #000080;
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}
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</style>
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</head>
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<body>
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<H1>Àâòîêëàññû</H1>
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<p>Ïðè îïèñàíèè êëàññà ïåðåä ñëîâîì <code><strong>class</strong></code> ìîæíî ïîñòàâèòü ñëîâî <code>
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<strong>auto</strong></code>. Òàêèå
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êëàññû íàçûâàþòñÿ àâòîêëàññàìè. Äëÿ àâòîêëàññîâ àâòîìàòè÷åñêè ãåíåðèðóåòñÿ
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êîíñòðóêòîð ñ ïàðàìåòðàìè, èíèöèàëèçèðóþùèìè âñå ïîëÿ êëàññà, à òàêæå ìåòîä
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<span class="auto-style1">ToString</span>, âûâîäÿùèé çíà÷åíèÿ âñåõ ïîëåé êëàññà. Íàïðèìåð:</p>
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<blockquote><code><b>type</b> Person = <strong>auto class</strong><br>
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name: string;<br> age: integer;<br><strong>end</strong>;<br><strong>
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var</strong> p := new Person('Èâàíîâ',20); // êîíñòðóêòîð àâòîêëàññà
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ãåíåðèðóåòñÿ àâòîìàòè÷åñêè<br>Writeln(p); // âûçûâàåòñÿ ñãåíåðèðîâàííûé
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àâòîìàòè÷åñêè ìåòîä ToString</code></blockquote>
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<p>Çäåñü â îòëè÷èå îò äåéñòâèÿ writeln ïî óìîë÷àíèþ âûâîäÿòñÿ çíà÷åíèÿ íå òîëüêî
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ïóáëè÷íûõ, à âñåõ ïîëåé.</p>
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</body>
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</html> |