This CL adds a new feature specification for 'generic function
instantiation' (aka partial specialization, type-curried invocation,
etc.), which amounts to implicitly obtaining a non-generic function
from a denotation of a generic function when the typing requires the
latter.
This feature spec relies on type inference, but as a black box (so
it can hardly be incompatible with any current or future version of
type inference in Dart).
Note that it is a restricted version of generic function
instantiation which is specified here, it only supports global and
static functions and instance methods; function literals and first
class function values are not supported.
I just learned from Vijay (Mar 23, 3pm CET) that first class functions
_do_ support generic function instantiation in some existing
implementations. So maybe there is no problem supporting them, and
we should just eliminate that restriction?
Here is a rendered version of the document, refreshed to match patch
set 19: https://gist.github.com/eernstg/bf816d3495e9b87ab6eb958ba707d016
Change-Id: Ie1fd601d3e359bfb5f4616f8ec68a110f42e01b7
Reviewed-on: https://dart-review.googlesource.com/47043
Reviewed-by: Lasse R.H. Nielsen <lrn@google.com>
Erik Ernst