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    <p>You need to <code>quote</code> the structure prior to obtaining the string representation: </p> <pre><code>(list 'quote foo) </code></pre> <p>where <code>foo</code> is the structure.</p> <p>Three additional remarks:</p> <ol> <li><p>traversing the code to quote all lists / seqs would not do at all, since the top-level <code>(defn ...)</code> form would also get quoted;</p></li> <li><p>lists are not the only potentially problematic type -- symbols are another one (<code>+</code> vs. <code>#&lt;core$_PLUS_ clojure.core$_PLUS_@451ef443&gt;</code>);</p></li> <li><p>rather than using <code>(str foo)</code> (even with <code>foo</code> already quoted), you'll probably want to print out the quoted <code>foo</code> -- or rather the entire code block with the quoted <code>foo</code> inside -- using <code>pr</code> / <code>prn</code>.</p></li> </ol> <p>The last point warrants a short discussion. <code>pr</code> explicitly promises to produce a readable representation if <code>*print-readably*</code> is <code>true</code>, whereas <code>str</code> only produces such a representation for Clojure's compound data structures "by accident" (of the implementation) <em>and still only if <code>*print-readably*</code> is <code>true</code></em>:</p> <pre><code>(str ["asdf"]) ; =&gt; "[\"asdf\"]" (binding [*print-readably* false] (str ["asdf"])) ; =&gt; "[asdf]" </code></pre> <p>The above behaviour is due to <code>clojure.lang.RT/printString</code>'s (that's the method Clojure's data structures ultimately delegate their <code>toString</code> needs to) use of <code>clojure.lang.RT/print</code>, which in turn chooses output format depending on the value of <code>*print-readably*</code>.</p> <p>Even with <code>*print-readably*</code> bound to <code>true</code>, <code>str</code> may produce output inappropriate for <code>clojure.lang.Reader</code>'s consumption: e.g. <code>(str "asdf")</code> is just <code>"asdf"</code>, while the readable representation is <code>"\"asdf\""</code>. Use <code>(with-out-str (pr foo))</code> to obtain a string object containing the representation of <code>foo</code>, guaranteed readable if <code>*print-readably*</code> is <code>true</code>.</p>
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    1. POClojure: generating files containing clojure breaks with persistent lists
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    1. USMichał Marczyk
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    1. POClojure: generating files containing clojure breaks with persistent lists
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    1. COMarczyk, you are a lifesaver. Seriously. Also, I see now this all warrants some research into the subtleties of read/eval/print, as this is kind of at the heart of the matter! Thanks for the glimpse into this wooly world.
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