v2.4.0

What's New

• add types.metatable_is(t) type constructor for testing the type of a table's metatable
• add types.clone as a special type checker that will shallow clone an object via its transformation (that is valid to be cloned)
• add types.null as an alias for nil checker, so you can reference it without quoting it in Lua
• add __tostring metamethod on all type objects. Converting a type object into a string will display its description

Bug Fixes

• MoonScript type checkers for instances no longer incorrectly return true when passed class objects. They will only return true when passed an appropriate instance of a MoonScript class
• is_type does not incorrectly return true when passed a class object extended from BaseType. It only returns true when passed an instance of a type checker. For example, passing in a type constructor types.is_type(types.shape) used to return true but now correctly returns false. The result of types.is_type(types.shape({...})) will still correctly return true`

Misc

• Minor refactoring of internal code with regard to describing nodes
• Clarify many parts of the documentation regarding how state works
• Write clear example about transform and avoiding mutating objects

Full Changelog: v2.3.0...v2.4.0