Clojure JIRA

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4.4

649

25-07-2011

[MATCH-43] Vector pattern - unreachable clause http://dev.clojure.org/jira/browse/MATCH-43 core.match <p>This is the simplest example I could come up with:</p> <p>(defn f <span class="error">[xs]</span><br/> (match xs<br/> <span class="error">[:a]</span> "a"<br/> <span class="error">[:b b]</span> b<br/> <span class="error">[:c]</span> "c"<br/> :else "problem!"))</p> <p><span class="error">[:a]</span> and <span class="error">[:b b]</span> can be matched with no problems, but <span class="error">[:c]</span> can't be matched for some reason:</p> <p>user=> (f <span class="error">[:a]</span>)<br/> "a"<br/> user=> (f <span class="error">[:b 1]</span>)<br/> 1<br/> user=> (f <span class="error">[:c]</span>)<br/> "problem!"</p> Clojure 1.3, core.match 0.2.0-alpha8 MATCH-43

Vector pattern - unreachable clause

Defect Major Resolved Completed David Nolen Benny Tsai Sat, 10 Dec 2011 11:19:50 -0600 Tue, 27 Dec 2011 20:23:57 -0600 Tue, 27 Dec 2011 20:23:57 -0600 0 0 <p>This will have to wait for <a href="http://dev.clojure.org/jira/browse/MATCH-31">http://dev.clojure.org/jira/browse/MATCH-31</a>. There are some deeper issues with vector pattern matching that need to get ironed out first.</p> <p>In the meantime just put your <span class="error">[:c]</span> test above <span class="error">[:b b]</span>. The key idea is to keep vector patterns of the same size "together".</p> <p>fixed, <a href="https://github.com/clojure/core.match/commit/b2ee29d701a9306c1c494d91c371c01a512aee0c">https://github.com/clojure/core.match/commit/b2ee29d701a9306c1c494d91c371c01a512aee0c</a></p> Global Rank