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65 lines
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<title>CLiki: ParenScriptObjectSystem</title>
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<span class="hidden">CLiki - ParenScriptObjectSystem</span>
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<div id="content"><div id="content-area"><div id="article-title">ParenScriptObjectSystem</div><div id="article">The ParenScript Object System (<a href="https://gitlab.common-lisp.net/suave/paren-psos">PSOS</a>) is a facility for object-oriented programming in ParenScript using the same style and techniques as the <a href="CLOS.html" class="internal">Common Lisp Object System</a>. It consists of a set of macros in lisp and a runtime environment in <a href="Parenscript.html" class="category">Parenscript</a>. The project is maintained by Red Daly (reddaly at gmail) and licensed under the <a href="GPL.html" class="category">GPL</a>.<p><h2>Features</h2><p>Multiple inheritance, generic functions, and basic method combination is currently implemented. Example Parenscript that uses PSOS:<p><div class="code"><span class="nonparen"><span class="paren1">(<span class="nonparen"><a href="https://www.cliki.net/site/HyperSpec/Body/mac_defclass.html" class="symbol"><i><span class="symbol">defclass</span></i></a> person <span class="paren2">(<span class="nonparen"></span>)</span></span>)</span>
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<span class="paren1">(<span class="nonparen"><a href="https://www.cliki.net/site/HyperSpec/Body/mac_defclass.html" class="symbol"><i><span class="symbol">defclass</span></i></a> politician <span class="paren2">(<span class="nonparen">person</span>)</span></span>)</span>
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<span class="paren1">(<span class="nonparen"><a href="https://www.cliki.net/site/HyperSpec/Body/mac_defgeneric.html" class="symbol"><i><span class="symbol">defgeneric</span></i></a> discuss-environment <span class="paren2">(<span class="nonparen">individual</span>)</span></span>)</span>
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<span class="paren1">(<span class="nonparen"><a href="https://www.cliki.net/site/HyperSpec/Body/mac_defmethod.html" class="symbol"><i><span class="symbol">defmethod</span></i></a> discuss-environment <span class="paren2">(<span class="nonparen"><span class="paren3">(<span class="nonparen">individual person</span>)</span></span>)</span>
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<span class="paren2">(<span class="nonparen">alert <span class="string">"I don't know anything about the environment"</span></span>)</span></span>)</span>
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<span class="paren1">(<span class="nonparen"><a href="https://www.cliki.net/site/HyperSpec/Body/mac_defmethod.html" class="symbol"><i><span class="symbol">defmethod</span></i></a> discuss-environment <span class="paren2">(<span class="nonparen"><span class="paren3">(<span class="nonparen">individual politician</span>)</span></span>)</span>
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<span class="paren2">(<span class="nonparen">alert <span class="string">"The environment is an important issue, but so is Osama Bin Laden"</span></span>)</span></span>)</span></span></div><p><h2>TODO</h2><p><ul>
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<li>method dispatch optimization
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</li>
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<li>slots beyond <a href="javascript.html" class="internal">javascript</a>'s built-in per-object slot storage.
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</li>
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<li>a well-defined <a href="MOP.html" class="internal">metaobject protocol</a>
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</li>
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