51 lines
1.6 KiB
HTML
51 lines
1.6 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="Öèêëè÷åñêàÿ çàâèñèìîñòü ìåæäó ìîäóëÿìè">
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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>Öèêëè÷åñêèå ññûëêè ìåæäó ìîäóëÿìè</H1>
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<p>Öèêëè÷åñêèå ññûëêè ìîäóëåé â
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èíòåðôåéñíûõ ÷àñòÿõ çàïðåùåíû. Íàïðèìåð, ñëåäóþùàÿ
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ñèòóàöèÿ
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îøèáî÷íà:</p>
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<blockquote>
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<p><code><b>unit</b> A;</code><b><code><br>
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interface</code></b><code><b><br>
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uses</b> B;</code><b><code><br>
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implementation</code></b><code><b><br>
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end</b>.<b><br>
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<br>
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unit</b> B;</code><b><code><br>
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interface</code></b><code><b><br>
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uses</b> A;</code><b><code><br>
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implementation</code></b><code><b><br>
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end</b>.</code></p>
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</blockquote>
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<p>Òàêèì îáðàçîì, íåâîçìîæíî îïðåäåëèòü äâà îáùåäîñòóïíûõ êëàññà â ðàçíûõ
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ìîäóëÿõ ñ îáúåêòíûìè ïîëÿìè, ññûëàþùèìèñÿ äðóã íà äðóãà.</p>
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<p>Îäíàêî, åñëè îäíà ññûëêà íàõîäèòñÿ â èíòåðôåéñíîé ÷àñòè, à
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âòîðàÿ - â ÷àñòè ðåàëèçàöèè, èëè îáå - â ÷àñòÿõ ðåàëèçàöèè, òî öèêëè÷åñêèå
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ññûëêè â ýòîì ñëó÷àå ðàçðåøåíû:</p>
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<blockquote>
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<p><code><b>unit</b> A;</code><b><code><br>
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interface</code></b><code><b><br>
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</b></code><b><code>implementation</code></b><code><b><br>
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uses</b> B;</code><b><code><br>
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</code></b><code><b>end</b>.<b><br>
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<br>
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unit</b> B;</code><b><code><br>
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interface</code></b><code><b><br>
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uses</b> A;</code><b><code><br>
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implementation</code></b><code><b><br>
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end</b>.</code></p>
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</blockquote>
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</body>
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</html> |