36 lines
1.2 KiB
HTML
36 lines
1.2 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="Self">
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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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</head>
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<body>
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<H1>Ïåðåìåííàÿ Self</H1>
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<p>Âíóòðè êàæäîãî íåñòàòè÷åñêîãî ìåòîäà íåÿâíî îïðåäåëÿåòñÿ ïåðåìåííàÿ
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<code>Self</code>, ññûëàþùàÿñÿ íà îáúåêò, âûçâàâøèé ýòîò ìåòîä.
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</p>
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<p>Íàïðèìåð:</p>
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<blockquote>
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<p><code><b>type</b> <br>
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A =<b> class</b><br>
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i: integer;<br>
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<b>constructor</b> Create(i: integer);<br>
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<b>begin<br>
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</b> Self.i := i;<br>
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<b>end</b>;<br>
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<b>end</b>;</code></p>
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</blockquote>
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<p>Â ìîìåíò âûçîâà êîíñòðóêòîðà <code>Create</code>
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îáúåêò áóäåò óæå ñîçäàí. Êîíñòðóêöèÿ <code>Self.i</code>
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ññûëàåòñÿ íà ïîëå <code>i</code> ýòîãî îáúåêòà, à íå íà
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ïàðàìåòð <code>i</code> ôóíêöèè <code>Create</code>. Ôàêòè÷åñêè â ëþáîì
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íåñòàòè÷åñêîì ìåòîäå ïåðåä èìåíåì ëþáîãî ïîëÿ è ìåòîäó ýòîãî êëàññà íåÿâíî
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ïðèñóòñòâóåò <code>Self.</code></p>
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</body>
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</html> |