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30 lines
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2.2 KiB
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<title>String interpolation — Ludic</title>
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<meta name="description" content="A backtick string with {expr} holes, each stringified and concatenated.">
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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="api.html#operators">Operators & tokens</a> <span>›</span> <span class="here">String interpolation</span></div>
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<div class="item-head">
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<span class="kind-badge kind-operator">operator</span>
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<h1 id="top">String interpolation</h1>
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</div>
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<code class="sig">`text {expr} more`</code>
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<div class="desc"><p>A backtick string `<code> </code>…<code> </code><code> is an interpolated string: any </code>{expr}<code> hole inside it is evaluated, converted to text, and concatenated with the surrounding literal parts. Numbers, </code>bool<code>s, and </code>fixed<code> values are stringified automatically and </code>string<code> values pass through, so </code><code> </code>score: {score}<code> </code><code> desugars to </code>"score: " + string(score)<code>. It is the readable way to build a message from mixed pieces without hand-writing a </code>+<code> chain. Write a literal brace with </code>{{<code> or </code>}}`.</p></div>
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<div class="examples"><h2>Example</h2><pre data-lang="ludic">let status_line: string = `score {score} — health {current_health}/{maximum_health}`
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Screen.status(status_line)
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print(`wave {wave_number} incoming`)</pre></div>
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