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2.1 KiB
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33 lines
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2.1 KiB
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<title>Regex.compile — Ludic</title>
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<meta name="description" content="Compile a pattern once for reuse; returns an error value (null) if it is invalid.">
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<header class="nav"><div class="wrap nav-in"><a class="brand" href="index.html"><span class="logo">L</span> Ludic</a><button class="nav-toggle" aria-label="Toggle menu" aria-expanded="false">☰</button><nav class="nav-links"><a href="index.html">Home</a><a href="api.html">API Reference</a><a class="nav-cta" href="https://git.workshopsoft.io/workshopsoft/ludic">Source ↗</a></nav></div></header>
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<div class="crumbs"><a href="api.html">API Reference</a> <span>›</span> <a href="ns-regex.html">Regex</a> <span>›</span> <span class="here">Regex.compile</span></div>
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<span class="kind-badge kind-method">method</span>
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<h1 id="top">Regex.compile</h1>
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<code class="sig">Regex.compile(pattern) -> Regex</code>
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<div class="desc"><p>Compiles <code>pattern</code> to a reusable <code>Regex</code> and returns it, or <code>null</code> if the pattern is malformed — so a bad pattern is a value you can check, never a crash. Compiling once and reusing with <a href="regex-test"><code>Regex.test</code></a> / <a href="regex-exec"><code>Regex.exec</code></a> avoids re-parsing the pattern every call, which matters in a hot loop.</p></div>
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<div class="params"><h2>Parameters</h2><div class="param" id="param-pattern"><code class="pname">pattern</code><span class="pdesc">the regular expression source</span></div></div>
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<div class="examples"><h2>Example</h2><pre data-lang="ludic">program Demo {
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entry {
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let re = Regex.compile("^\\d{4}-\\d{2}-\\d{2}$")
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if Regex.test("2026-08-31", re) { print(1) }
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}
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}</pre></div>
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