4.28.2 reference expressions

A reference expression:

1. any identifier
2. any subexpression of an identifier
3. an object of type reference (result will reference the original identifier, too)

Example:

system("reference"); system("shared"); int i = 17; reference ref = i; // new reference ref; ==> 17 ==> reference second = ref; second; ==> 17 ==> second = 9; // also tied to 'i' i; ==> 9 typeof(ref); ==> reference list ll = list(1, 2, 3); reference lref = ll[1]; lref; ==> 1 ==> lref = 12; ll; ==> [1]: ==> 12 ==> [2]: ==> 2 ==> [3]: ==> 3