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content/glyph/book/text_editing/evaluation.html

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<!DOCTYPE html> 
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		<title>Evaluating Ruby code and Configuration Settings &ndash; Glyph Documentation</title> 



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					<h1>Evaluating Ruby code and Configuration Settings</h1> 
					<h2>Glyph Documentation</h2>
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							<nav><a href="/glyph/book/text_editing/inclusions.html">Including Files and Snippets &larr;</a><a href="/glyph/book/index.html">Contents</a><a href="/glyph/book/text_editing/conditionals.html">&rarr; Conditional Macros</a></nav>
								<p>Glyph Language is not a full-blown programming language and it is currently not Turing-complete (it does not provide loops). However, it is possible to evaluate simple ruby code snippets using the <code>ruby</code> macro (aliased to <code>%</code>), like this:</p>
<ul>
	<li><code>%[2 + 2]</code> &rarr; 4</li>
	<li><code>%[Time.now]</code> &rarr; Wed Sep 22 13:49:51 +0200 2010</li>
	<li><code>%[Glyph::VERSION]</code> &rarr; 0.4.1</li>
</ul>
<p>The scope for the code evaluation is the Kernel module, (with all inclusions required by Glyph itself).</p>
<p>Although it is possible to retrieve Glyph configuration settings in this way (e.g. <code>%[cfg('document.author')]</code>), the <a href="/glyph/book/macros/macros_core.html#m_config"><code>config</code></a> macro (aliased to <code>$</code>) makes things slightly simpler (e.g. <code>$[document.author]</code>).</p>
							<nav><a href="/glyph/book/text_editing/inclusions.html">Including Files and Snippets &larr;</a><a href="/glyph/book/index.html">Contents</a><a href="/glyph/book/text_editing/conditionals.html">&rarr; Conditional Macros</a></nav>
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