Clarification for the "Add type aliases" exercise

[imteekay]

Hey! I'm working on the next exercise for the mini-typescript and it's the "Add type aliases" one. But I'm not sure if it's already implemented.

• The lexer already creates Type token
• The parser already parses the Type token and creates the TypeAlias ast node
• The binder assigns the type alias into the symbols table and the compiler can reference to it later in the program
• And the checker checks the type based on the typename

What should I do next in this exercise, @sandersn? Thank you!

[sandersn]

Hah, you're right. As a follow-up you could consider adding interface support, which requires both type and interface to be treated (nearly) the same -- something that the code currently does not support. It would be quite similar to adding both var and let.

[sandersn]

Done