Description Matt Heitz 2011-09-07 17:46:28 EDT

Curly braces will no longer make a variable not be null.  Only an initializer or assignment can do that.


The set-values block is only a set-values block; it no longer creates an instance of a type. 

Each of the following variations creates an instance, and they are equally efficient::

	b Button {text ="abc"};
	b Button = new Button {text = "abc"};
	b Button? = new Button{text = "abc"};
	b Button {text = "abc"} = new Button{text="xyz"};  

In the last example, only fields can be in the second block; annotations cannot.  Any assignments to fields in the first block are ignored.

You cannot assign a value to a nullable variable that was not initialized.  The following examples are not valid: 

	b Button? {text = "abc"};   // is an error because of the set-values block (setting a field of a null variable).
	b Button? {text = "abc"}  = new Button {text = "xyz"};   // is also an error because of the leftmost set-values block.

The errors will be caught at compile time.