Why does this code warned unreachable in Groovy?

Question

I was thinking to return a map with several directories list. But the very first caused a warning for me:

def enlistFiles() {

    return
        [downloadFolder: downloadFolder.listFiles( new FileFilter() {
            @Override
            boolean accept(File file) {
                return !file.isDirectory()
            }
        })]

}

"Code unreachable"

Why?

Because of optional semicolons, the newline at the `return` line is interpreted as an end of statement. So you have 2 statements : one `return`, then an unreachable map. — melix, Dec 08 '15 at 09:01
@melix you should post that as an answer. [Damn](http://robertnyman.com/2008/10/16/beware-of-javascript-semicolon-insertion/)! — Will, Dec 09 '15 at 19:55

score 1 · Accepted Answer · answered May 06 '16 at 11:04

Anything below line 3 will not be executed. The return key word should not be followed by a line break. Your code should be:

def enlistFiles() {
    return [downloadFolder: downloadFolder.listFiles( new FileFilter() {
            @Override
            boolean accept(File file) {
                return !file.isDirectory()
            }
        })]

}

Why does this code warned unreachable in Groovy?

1 Answers1