TokenStream.eat() #20
Description
When parsing tokens with an instance of TokenStream, it is common to assert the token type then consume it. Currently that requires two method calls.
stream.expect(TokenType.IF)
stream.next() # move past `if`If we introduce TokenStream.eat(), which asserts the token type an consumes it, we can reduce that to one method call and be more efficient in its implementations.
const token = stream.eat(TokenType.IF)