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https://issues.apache.org/jira/browse/JEXL-454?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Henri Biestro updated JEXL-454:
-------------------------------
Priority: Critical (was: Major)
> Switch NaN case not found
> -------------------------
>
> Key: JEXL-454
> URL: https://issues.apache.org/jira/browse/JEXL-454
> Project: Commons JEXL
> Issue Type: Bug
> Affects Versions: 3.6.1
> Reporter: Vincent Bussol
> Priority: Critical
>
> The switch / case statement (or expression) does not find a NaN constant case.
> {code:java}
> let v = NaN;
> switch (v) {
> case NaN:
> // not found
> break;
> case 1:
> // some code
> } {code}
> Without a default case, this example ends in error (no case in switch
> statement for: NaN).
> A simple test:
> {code:java}
> @Test
> void testSwitchNaN0() {
> // a one statement script
> final String src = "switch (x) {\n"
> + " case NaN: return 'NotANumber';\n"
> + " case 1: return 'one';\n"
> + " case 2: return 'two';\n"
> + " case 3: return 'three';\n"
> + " default: return 'many';\n"
> + "}";
> final JexlEngine jexl = new JexlBuilder().create();
> final JexlScript script = jexl.createScript(src, "x");
> Object result = script.execute(null, Double.NaN);
> assertEquals("NotANumber", result);
> result = script.execute(null, 1);
> assertEquals("one", result);
> result = script.execute(null, 42);
> assertEquals("many", result);
> } {code}
> It appears that the switch node stores the index using the value Double.NaN
> and then looks it up using the value JexlParser.NAN (via the 'switchCode'
> method).
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