Reserved words

[tethal]

Disallow user declarations of some word, such as int, hash, True, self, if... The reasons are:

• using keywords such as else as function names leads to confusion
• redefining const True = False; can be dangerous
• parser needs to identify types in order to solve an ambiguity regarding type arguments (list<int> a)

Note that built-in functions that share names with types (int(), hash()) will still exist, users just wont be able to define them.

[davidnich]

True, False, NULL, and NOTHING are now reserved words TO DO:

• [ ] self
• [ ] argv