58 lines
5 KiB
HTML
58 lines
5 KiB
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<title>CLiki: GENSYMLET</title>
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<span class="hidden">CLiki - GENSYMLET</span>
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<div id="content"><div id="content-area"><div id="article-title">GENSYMLET</div><div id="article"><div class="code"><span class="nonparen"><span class="paren1">(<span class="nonparen"><a href="https://www.cliki.net/site/HyperSpec/Body/mac_defmacro.html" class="symbol"><i><span class="symbol">defmacro</span></i></a> gensymlet <span class="paren2">(<span class="nonparen"><span class="paren3">(<span class="nonparen">&rest bindings</span>)</span> &body body</span>)</span>
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<span class="paren2">(<span class="nonparen"><a href="https://www.cliki.net/site/HyperSpec/Body/speope_letcm_letst.html" class="symbol"><i><span class="symbol">let</span></i></a> <span class="paren3">(<span class="nonparen"><span class="paren4">(<span class="nonparen">keys <span class="paren5">(<span class="nonparen"><a href="https://www.cliki.net/site/HyperSpec/Body/mac_loop.html" class="symbol"><i><span class="symbol">loop</span></i></a> for n in bindings collect <span class="paren6">(<span class="nonparen"><a href="https://www.cliki.net/site/HyperSpec/Body/acc_firstcm_s_inthcm_tenth.html" class="symbol">first</a> n</span>)</span></span>)</span></span>)</span>
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<span class="paren4">(<span class="nonparen">vals <span class="paren5">(<span class="nonparen"><a href="https://www.cliki.net/site/HyperSpec/Body/mac_loop.html" class="symbol"><i><span class="symbol">loop</span></i></a> for n in bindings collect <span class="paren6">(<span class="nonparen"><a href="https://www.cliki.net/site/HyperSpec/Body/acc_firstcm_s_inthcm_tenth.html" class="symbol">second</a> n</span>)</span></span>)</span></span>)</span></span>)</span>
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`<span class="paren3">(<span class="nonparen"><i><span class="symbol">with-gensyms</span></i> <span class="paren4">(<span class="nonparen">,@keys</span>)</span>
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`<span class="paren4">(<span class="nonparen"><a href="https://www.cliki.net/site/HyperSpec/Body/speope_letcm_letst.html" class="symbol"><i><span class="symbol">let</span></i></a> <span class="paren5">(<span class="nonparen">,,@<span class="paren6">(<span class="nonparen"><a href="https://www.cliki.net/site/HyperSpec/Body/mac_loop.html" class="symbol"><i><span class="symbol">loop</span></i></a> for j in keys
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for k in vals collect ``<span class="paren1">(<span class="nonparen">,,j ,,k</span>)</span></span>)</span></span>)</span>
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,,@body</span>)</span></span>)</span></span>)</span></span>)</span>
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</span></div><p><a href="macro example.html" class="category">macro example</a></div></div>
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<div id="footer" class="buttonbar"><ul><li><a href="GENSYMLET.html">Current version</a></li>
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