Bug 416226

Description Stefano Rocca 2013-08-30 06:09:15 EDT

In the following code the ternary operator is incomplete and Eclipse correctly reports a syntax error. The problem is that a the row above appears another error (s cannot be resolved) about the variable of the foreach loop:

import java.util.ArrayList;

public class Test {
	public Test() {
		ArrayList<String> ls = new ArrayList<String>();
		for (String s : ls) {
			System.out.println(s); // s cannot be resolved
			s = s != null ? s.concat(s); // syntax error
		}
	}
}

If I complete the ternary operator, both errors disappear.
This example is trivial, but I encountered this error in a more complex scenario, with three nested foreach and the variables declared in each foreach where not resolved:

import java.util.ArrayList;

public class Test {
	public Test() {
		ArrayList<String> ls = new ArrayList<String>();
		ArrayList<String> lt = new ArrayList<String>();
		ArrayList<String> lu = new ArrayList<String>();
		for (String u : lu) {
			for (String t : lt) {
				for (String s : ls) {
					System.out.println(s); // s not resolved
					System.out.println(t); // t not resolved
					System.out.println(u); // u not resolved
					s = s != null ? s.concat(s); // syntax error
				}
			}
		}
	}

}

Furthermore, changing the foreach to a for as in this example:

import java.util.ArrayList;
import java.util.Iterator;

public class Test {
	public Test() {
		ArrayList<String> ls = new ArrayList<String>();
		for (Iterator<String> iter = ls.iterator(); iter.hasNext();) {
			String s = iter.next();
			System.out.println(s);
			s = s != null ? s.concat(s); // syntax error
		}
	}
}

Resolves the problem (i.e. there's only the syntax error)