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From "Paul King (JIRA)" <j...@apache.org>
Subject [jira] [Created] (GROOVY-7958) Incorrect parsing of comma-separated variable declaration as single statement after if/while/for
Date Wed, 05 Oct 2016 07:32:20 GMT
Paul King created GROOVY-7958:
---------------------------------

             Summary: Incorrect parsing of comma-separated variable declaration as single
statement after if/while/for
                 Key: GROOVY-7958
                 URL: https://issues.apache.org/jira/browse/GROOVY-7958
             Project: Groovy
          Issue Type: Bug
            Reporter: Paul King
            Assignee: Paul King


Currently during parsing a single (comma-separated) variable declaration is turned into multiple
statements on the fly. If this occurs when such a statement is the single statement after
an if/while/for, then only the first statement is picked up and the next is left dangling
within the AST tree. For 'if' it becomes the else statement! while in the 'for/while' cases
I think it is ignored. So, the following code doesn't work as expected:
{code}
int xNext = 0, yNext = 0
if (false) int x = xNext++, y = yNext++
assert xNext == 0 && yNext == 0
if (true) int x = xNext++, y = yNext++
assert xNext == 1 && yNext == 1
{code}
This is very much an edge case (what good is a declaration if you then have no block in which
to use it?) but is still worth fixing.



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