97 lines
5.3 KiB
HTML
97 lines
5.3 KiB
HTML
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<!DOCTYPE html>
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<title>CLiki: parseq</title>
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<link rel="alternate" type="application/atom+xml" title="ATOM feed of edits to current article"
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href="https://www.cliki.net/site/feed/article.atom?title=parseq">
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<link rel="stylesheet" href="static/css/style.css">
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<link rel="stylesheet" href="static/css/colorize.css">
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</head>
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<body>
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<span class="hidden">CLiki - parseq</span>
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<div id="content"><div id="content-area"><div id="article-title">parseq</div><div id="article">A <a href="parser generator.html" class="category">parser generator</a> for common lisp, inspired by <a href="ESRAP.html" class="category">ESRAP</a><p><h3>Features:</h3>
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<ul>
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<li>Parses strings, vectors (e.g. binary data) and lists
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</li>
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<li>Allows parsing of nested sequences (e.g. trees, strings within lists, ...)
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</li>
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<li>Simple interface, very similar to Esrap
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</li>
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<li>Provides many specific and non-specific terminal symbols
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</li>
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<li>Implements the standard PEG (parsing expression grammar) expressions as well as useful extensions
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</li>
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<li>Packrat parsing can be enabled for individual PEG rules
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</li>
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<li>Parsing expression rules are compiled
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</li>
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<li>Parse tree transformations can be defined together with each PEG rule
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</li>
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<li>Grammars can be made context aware:
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<ul>
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<li>Run parse results of a PEG rule through lisp code to influence parsing success
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</li>
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<li>Share data between parse rules
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</li>
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</ul>
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</li>
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<li>Parsing rules can be parameterised
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</li>
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<li>Uses separate namespace(s) for parse rules
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</li>
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<li>Tracing of grammar rules
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</li>
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<li>Meaningful parse error messages
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</li>
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</ul><p><h3>Usage:</h3>
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First, define a set of grammar rules:
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<div class="code"><span class="nonparen"><span class="paren1">(<span class="nonparen"><i><span class="symbol">defrule</span></i> foo <span class="paren2">(<span class="nonparen"></span>)</span> <span class="string">"foo"</span></span>)</span>
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<span class="paren1">(<span class="nonparen"><i><span class="symbol">defrule</span></i> bar <span class="paren2">(<span class="nonparen"></span>)</span> <span class="string">"bar"</span></span>)</span>
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<span class="paren1">(<span class="nonparen"><i><span class="symbol">defrule</span></i> foobar <span class="paren2">(<span class="nonparen"></span>)</span> <span class="paren2">(<span class="nonparen"><a href="https://www.cliki.net/site/HyperSpec/Body/any_and.html" class="symbol">and</a> foo bar</span>)</span></span>)</span>
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</span></div>
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The rule <code>foobar</code> will parse the string <code>"foobar"</code>.<p>Parsing is initiated by calling
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<div class="code"><span class="nonparen"><span class="paren1">(<span class="nonparen">parseq 'foobar <span class="string">"foobar"</span></span>)</span>
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</span></div>
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The result is the list <code>("foo" "bar")</code>.<p><h3>Homepage:</h3>
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<a href="https://github.com/mrossini-ethz/parseq">https://github.com/mrossini-ethz/parseq</a><p><h3>Installation:</h3>
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Parseq can be installed through <a href="Quicklisp.html" class="internal">Quicklisp</a>.<p><h3>License:</h3>
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<a href="GPL.html" class="category">GPL</a></div></div>
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<div id="footer" class="buttonbar"><ul><li><a href="parseq.html">Current version</a></li>
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<li><a href="https://www.cliki.net/site/history?article=parseq">History</a></li>
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<li><a href="https://www.cliki.net/site/backlinks?article=parseq">Backlinks</a></li><li><a href="https://www.cliki.net/site/edit-article?title=parseq&from-revision=3748670698">Edit</a></li><li><a href="https://www.cliki.net/site/edit-article?create=t">Create</a></li></ul></div>
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</div>
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<div id="header-buttons" class="buttonbar">
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<ul>
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<li><a href="https://www.cliki.net/">Home</a></li>
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<li><a href="https://www.cliki.net/site/recent-changes">Recent Changes</a></li>
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<li><a href="CLiki.html">About</a></li>
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<li><a href="Text Formatting.html">Text Formatting</a></li>
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<li><a href="https://www.cliki.net/site/tools">Tools</a></li>
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</ul>
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<div id="search">
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<form action="https://www.cliki.net/site/search">
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<label for="search_query" class="hidden">Search CLiki</label>
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<div id="pageheader">
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<div id="header">
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<span id="logo">CLiki</span>
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<span id="slogan">the common lisp wiki</span>
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</body></html>
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