This updates the parser to detect constructors vs methods
in classes vs mixins vs extensions. Rather than generating a single
endMethod event and require listeners to determine the type of
declaration, the parser now generates different events for
different types of declarations so that listeners can process
each of these different types separately.
In addition, this lays the groundwork for fixing extension declaration
error messages and moving error generation that is duplicated
in the various listeners into the parser.
Change-Id: Ia86a4bf3e6f1442ca4926c754b66e7d6e86fb47d
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/114900
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
danrubel
6061906a77