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2.1 KiB
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36 lines
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2.1 KiB
HTML
<!doctype html>
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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">
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<title>fn — Ludic</title>
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<meta name="description" content="A top-level function named as a value - the entry point handed to Job.parallel_for.">
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<link rel="stylesheet" href="base.css">
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<link rel="stylesheet" href="docs.css">
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<body>
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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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<main class="wrap item">
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<div class="crumbs"><a href="api.html">API Reference</a> <span>›</span> <a href="api.html#structure">Program structure</a> <span>›</span> <span class="here">fn</span></div>
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<div class="item-head">
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<span class="kind-badge kind-keyword">keyword</span>
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<h1 id="top">fn</h1>
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</div>
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<code class="sig">fn name</code>
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<div class="desc"><p><code>fn name</code> names a top-level function as a value, so it can be handed to something that calls it later - today, <code>Job.parallel_for</code>, which runs it on worker threads. It is a plain function reference: no closure and nothing captured, so everything the function needs is passed to it (for <code>Job.parallel_for</code>, through its <code>ctx</code> argument). A worker function takes <code>(i: int, ctx)</code> and returns <code>void</code>; the compiler rejects any other shape.</p></div>
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<div class="examples"><h2>Example</h2><pre data-lang="ludic">program Squares {
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function square(i: int, out: words) -> void { out[i] = i * i }
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entry {
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let sq = words(1000)
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Job.parallel_for(1000, fn square, sq)
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print(sq[12])
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}
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}</pre></div>
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<a class="back" href="api.html">← All symbols</a>
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<script src="ludic-highlight.js"></script>
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<script>Ludic.highlightAll(); Ludic.installCards(); Ludic.flashTarget();</script>
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