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48 lines
No EOL
2.1 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html lang="en">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<link rel="STYLESHEET" href="../../book.css"
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type="text/css">
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<title>CDT Programmer's Guide</title>
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</head>
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<body>
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<p><span style="font-style: italic;">Note: This is a work in progress
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for CDT 3.0. Changes should be expected until further notified.</span><br>
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</p>
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<h1>CDT DOM</h1>
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<p>What is a DOM? Well, let me tell you. The DOM, or Document Object
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Model, is a programmatic way to see the underlying source code in both
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a syntactic and semantic view using an Abstract Syntax Tree (AST) and
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to allow changes in the AST to be reflected back out to the source
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code.<br>
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</p>
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<h2>Syntactic View</h2>
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<p>The syntactic view (which we sometimes call the physical view)
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represents the syntactic structure of the program. This is driven
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mainly by the grammar that the parser follows, mapping from terminals
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up to the entry rule in the grammer. This view fulfills the role of a
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traditional Abstract Syntax Tree, and you'll see that the classes that
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make up this view have AST in their name.<br>
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</p>
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<p>The top node of the Syntactic View is <a
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href="../../reference/api/org/eclipse/cdt/core/dom/ast/IASTTranslationUnit.html">IASTTranslationUnit</a>.
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The translation unit object can be accessed from the C Model's <a
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href="../../reference/api/org/eclipse/cdt/core/model/ITranslationUnit.html">ITranslationUnit</a>
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object.<br>
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</p>
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<h2>Semantic View</h2>
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<p>The semantic view (which we sometimes call the logical view)
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represent semantic elements in the program. These elements are
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generally types, variables, and functions. The JDT calls these things
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bindings, so we do to. However, the more general rule is that anything
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that links sub-branches of the AST is a binding.<br>
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</p>
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<p>The most common way to get from the Syntactic View is to navigate
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from an <a
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href="../../reference/api/org/eclipse/cdt/core/dom/ast/IASTName.html">IASTName</a>
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view to the <a
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href="../../reference/api/org/eclipse/cdt/core/dom/ast/IBinding.html">IBinding</a>
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that represents the Semantic object for that
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given name.</p></body>
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</html> |