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104 lines
3.6 KiB
HTML
104 lines
3.6 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<link rel="stylesheet" href="index.css" />
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<title>Womangling</title>
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</head>
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<body>
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<main class="main">
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<div class="content" id="content-area">
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<h1>
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<a class="root-link" href="/">Learn C++ Itanium Symbol Mangling</a>
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</h1>
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<h2>Lesson 1: Basics</h2>
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<noscript>
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<p>
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Warning: You have JavaScript disabled While the content is still
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viewable, interactive exercises will not work. Consider enabling
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JavaScript for this website.
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</p>
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</noscript>
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<section data-step="0" class="step">
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<p>
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After getting an understanding of how this guide works and learning
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about the not-mangling of C identifiers, we are ready to dive into
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C++.
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</p>
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<p>
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Every C++ mangled symbol is prefixed with the string
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<code>_Z</code>. This signifies that this is a mangled C++ symbol.
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<code>_Z</code> starts with an underscore followed by an uppercase
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letter. All symbols of that structures are reserved by the C
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standard and cannot be used by programs. This ensures that there are
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no name collisions with normal C functions and mangled C++
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functions.
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</p>
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<p>
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After that, the name of the entity is stored. For now, we will only
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look at functions. For functions, the function type is appended to
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the name to get the full symbol.
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</p>
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<pre class="code">
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void f() {}
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</pre>
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<p>
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This empty function will be mangled to <code>_Z1fv</code>. The
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<code>1f</code> signifies the name (we will look at this in more
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detail later in this lesson) and the <code>v</code> signifies the
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function type (which we will visit in more detail in a future
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lesson).
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</p>
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<div class="quiz-section">
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<p>
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Which of these symbols cannot possibly be a mangled C++ symbol?
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Answer with the name of the symbol.
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</p>
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<ul>
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<li><code>_ZN3FooIA4_iE3barE</code></li>
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<li><code>_ZN6System5Sound4beepEv</code></li>
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<li><code>_RN3FooIA4_iE3barE</code></li>
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</ul>
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<form
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data-challenge="1"
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data-answer="_RN3FooIA4_iE3barE"
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data-hint="Look at the prefix"
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>
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<input class="quiz-input" />
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<button
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data-challenge-submit="1"
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class="submit-challenge"
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type="submit"
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>
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Answer
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</button>
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<div class="error"></div>
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</form>
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</div>
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</section>
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<section data-step="1" class="step">
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<p></p>
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<div class="quiz-section">
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<form data-challenge="2" data-answer="meow">
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<input class="quiz-input" />
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<button
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data-challenge-submit="2"
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class="submit-challenge"
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type="submit"
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>
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Answer
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</button>
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<div class="error"></div>
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</form>
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</div>
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</section>
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</div>
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</main>
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<script>
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window.LESSON = 1;
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</script>
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<script type="module" src="./lessons.js"></script>
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</body>
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</html>
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