http://dev.clojure.org/jira This file is an XML representation of an issue en-us 4.4 649 25-07-2011 http://dev.clojure.org/jira/browse/CLJ-455 Clojure <p>(class (* 1000 1000 1000 1000 1000 1000 1000))<br/> 1.1 returns : java.math.BigInteger<br/> 1.3.0-alpha returns : java.math.BigIntegerArithmeticException integer overflow clojure.lang.Numbers.throwIntOverflow (Numbers.java:1575)</p> CLJ-455

Calculating large numbers results in java.math.BigIntegerArithmeticException

Defect Closed Declined Unassigned None Fri, 8 Oct 2010 21:36:00 -0500 Sat, 23 Oct 2010 22:52:00 -0500 Sat, 23 Oct 2010 22:52:00 -0500 Backlog 0 0 <p>Converted from <a href="http://www.assembla.com/spaces/clojure/tickets/455">http://www.assembla.com/spaces/clojure/tickets/455</a></p> <p>ataggart said: This is correct behavior with respect to 1.3.0 (yes, it's a breaking change). </p> <p>If one wants to allow numbers larger than what fits in a long to flow out of math ops, one needs to explicitly start with a BigInt:</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java">user=&gt; (type 1N) clojure.lang.BigInt user=&gt; (class (* 1000N 1000N 1000N 1000N 1000N 1000N 1000N)) clojure.lang.BigInt&lt;/code&gt;&lt;/pre&gt; If one wants to allow autopromotion, one can use the <span class="code-keyword">new</span> <span class="code-quote">"tick"</span> math ops: &lt;pre&gt;&lt;code&gt;user=&gt; (class (*' 1000 1000 1000 1000 1000 1000 1000)) clojure.lang.BigInt</pre> </div></div> <p>NB: Rich suspects almost no one should need these ops, and if you think you do, you're probably wrong.</p> Global Rank