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https://issues.apache.org/jira/browse/JEXL-307?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16985015#comment-16985015
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Dmitri Blinov commented on JEXL-307:
------------------------------------
The following test fails with *undefined variable x* in most inner block;
{code:java}
@Test
public void testInnerAccess() throws Exception {
JexlFeatures f = new JexlFeatures();
f.lexical(true);
JexlEngine jexl = new JexlBuilder().strict(true).features(f).create();
JexlScript script = jexl.createScript("var x = 32; (()->{ for(var x :
null) { var c = 0; {return x; }} })();");
}
{code}
Interestingly, the next test case passes successfully
{code:java}
@Test
public void testInnerAccess() throws Exception {
JexlEngine jexl = new JexlBuilder().strict(true).lexical(true).create();
JexlScript script = jexl.createScript("var x = 32; (()->{ for(var x :
null) { var c = 0; {return x; }} })();");
}
{code}
> Variable redeclaration option
> -----------------------------
>
> Key: JEXL-307
> URL: https://issues.apache.org/jira/browse/JEXL-307
> Project: Commons JEXL
> Issue Type: New Feature
> Affects Versions: 3.1
> Reporter: Dmitri Blinov
> Assignee: Henri Biestro
> Priority: Minor
> Fix For: 3.2
>
>
> As of now, JEXL allows a script writer to redeclare a local variable during
> script evaluation.
> {code:java}
> var a = 1; var a = 2;{code}
> This may lead to potential errors with misspelled names and clashed
> variables. Checking for already defined variable is a common feature of many
> languages. This feature can be implemented in JEXL as an additional option of
> JexlFeatures class, enabled by default, thus allowing compatibility with
> existing code.
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