Bug 120389 [quick fix] replace conditional with if-else removes + from +=
Using Build I20051102-1600. I create a class [snip] package bla; class Bla { void bla() { boolean cond = true; int i = 42; i += ( cond ) ? 1 : 2; } } [snap] Now I move the cursor over the second cond and trigger the Quickfix 'Replace conditional with if-else'. This results in [snip] int i = 42; if (cond) i = 1; else i = 2; [snap] i.e. replaces the '+=' with '='. (Credit to Jordi Boehme for finding this.)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/correction/AdvancedQuickAssistProcessor.java
return false;
		}
		InfixExpression infixExpression = (InfixExpression) node;
		if (infixExpression.getOperator() != orOperator) {
			return false;
		}
		int offset= isOperatorSelected(infixExpression, context.getSelectionOffset(), context.getSelectionLength());
		if (offset == -1) {
			return false;
		}
		
		Statement statement = ASTResolving.findParentStatement(node);
		if (!(statement instanceof IfStatement)) {
			return false;
		}
		IfStatement ifStatement = (IfStatement) statement;
		if (ifStatement.getElseStatement() != null) {
			return false;
		}
		
		InfixExpression topInfixExpression = infixExpression;
		while ((topInfixExpression.getParent() instanceof InfixExpression)
				&& ((InfixExpression) topInfixExpression.getParent()).getOperator() == orOperator) {
			topInfixExpression = (InfixExpression) topInfixExpression.getParent();
		}
		if (ifStatement.getExpression() != topInfixExpression) {
			return false;
		}
		
		if (resultingCollections == null) {