255 lines
7.3 KiB
HTML
255 lines
7.3 KiB
HTML
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This is <a href="."><em>Devhints.io cheatsheets</em></a> — a collection of cheatsheets I've written.
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<div class='post-item'>
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<div class='post-headline -cheatsheet'>
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<p class='prelude'><span></span></p>
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<h1><span>Parsimmon</span></h1>
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<div class='post-content -cheatsheet'>
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<pre><code class="language-js">const P = require('parsimmon')
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P.regexp(/[a-z]+/)
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.parse('hello')
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//=> { status: true, value: ['hello'] }
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</code></pre>
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<h2 id="atoms">Atoms</h2>
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<pre><code class="language-js">P.regexp(/[a-z]+/)
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P.string('hello')
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P.oneOf('abc') // like P.regexp(/[abc]/)
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P.whitespace
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P.optWhitespace
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P.eof
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</code></pre>
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<h2 id="combinators">Combinators</h2>
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<pre><code class="language-js">P.seq(a, b, c) // sequence of these
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P.alt(a, b) // any of these
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P.sepBy(a, P.string(',')) // sequence of `a`, separated by ','
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P.sepBy1(a, P.string(',')) // same, at least once
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a.or(b) // like P.alt(a, b)
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a.skip(b) // parses `b` but discards it
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a.many()
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a.times(3)
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a.times(1, 4) // 1 <= x <= 4
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a.atMost(10)
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a.atLeast(10)
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</code></pre>
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<h2 id="formatting">Formatting</h2>
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<pre><code class="language-js">P.seq(P.number, P.oneOf('+-*/'), P.number)
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.map(([left, oper, right]) => ({ oper, left, right }))
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</code></pre>
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<h2 id="reference">Reference</h2>
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<ul>
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<li><a href="https://github.com/jneen/parsimmon/blob/master/API.md">https://github.com/jneen/parsimmon/blob/master/API.md</a></li>
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</ul>
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</div>
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</div>
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<div class="about-the-site">
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<div class="container">
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<p class='blurb'>
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<strong><a href=".">Devhints.io cheatsheets</a></strong> is a collection of cheatsheets I've written over the years.
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Suggestions and corrections? <a href='https://github.com/rstacruz/cheatsheets/issues/907'>Send them in</a>.
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<i class='fleuron'></i>
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I'm <a href="http://ricostacruz.com">Rico Sta. Cruz</a>.
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Check out my <a href="http://ricostacruz.com/til">Today I learned blog</a> for more.
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</p>
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<p class='back'>
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<a class='big-button -back -slim' href='.#toc'></a>
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