I broke this functionality when I refactored FunctionTypeImpl into
lazy and strict variants; this CL restores it and simplifies it.
This CL also adds a new method to the analyzer API:
FunctionTypeAliasElement.instantiate(), to allow a client to supply
type arguments to a typedef (as one would at a site where the typedef
is used), to produce a type. Putting the method in
FunctionTypeAliasElement helps move us toward an API that
distinguishes type "constructors" from types (a generic typedef
defines not just one type but a family of types; to obtain a type one
must instantiate the typedef by supplying type arguments).
Change-Id: I722db2befe2d54fd53d625ddba0dec856a555a7b
Reviewed-on: https://dart-review.googlesource.com/62282
Commit-Queue: Paul Berry <paulberry@google.com>
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Paul Berry
9179db84df