Bug 492405

Description Colin Sharples 2016-04-25 17:30:24 EDT

If you use content assist to fill out a method call that takes a functional interface as a parameter, and attempt to insert a Lambda expression that itself has multiple arguments, content assist inserts the wrong number of parentheses.

Steps to reproduce:

1. Create an object that has a method with a functional interface as parameter, where the interface method has multiple parameters. An example is the JavaFX properties that you can add a ChangeListener.

  TextField text = new TextField();
  text.textProperty().

2. Use ctrl+space to select the addListener(ChangeListener) method
  text.textProperty().addListener(listener); 
 
  the listener argument is highlighted and can be over-typed.

3. The ChangeListener changed() method takes three parameters which are generally called something like "ov", "oldValue" and "newValue", so type the following to replace the placeholder text:
  
  (ov, oldValue, newValue)

Expected result: cursor position shown by |
  text.textProperty().addListener((ov, oldValue, newValue)|); 

Actual result:
  text.textProperty().addListener((ov, oldValue, newValue);|

so you end up with a missing parenthesis and the cursor in the wrong place.