Assignment to Fields

[sunjay]

Currently, the AST only supports assignment to plain identifiers. The grammar should support assignment to fields (at an arbitrary depth).

// currently supported
foo = 2;

// wanted
bar.foo.spam = 4;
bar.foo.spam.car = 4;

Note that this is just the grammar to support this. The actual implementation will be when #39 is completed.

• Fields should be properly nested so that foo.bar.spam.car = 4 is equivalent to ((foo.bar).spam).car = 4. (like Arbitrary Field Access #57)
• Field privacy should be respected