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Robert Griesemer a91d0b649c cmd/compile/internal/types2: disallow lone type parameter on RHS of type declaration
We may revisit this decision in a future release. By disallowing this
for Go 1.18 we are ensuring that we don't lock in the generics design
in a place that may need to change later. (Type declarations are the
primary construct where it crucially matters what the underlying type
of a type parameter is.)

Comment out all tests that rely on this feature; add comments referring
to issue so we can find all places easily should we change our minds.

Fixes #45639.

Change-Id: I730510e4da66d3716d455a9071c7778a1e4a1152
Reviewed-on: https://go-review.googlesource.com/c/go/+/359177
Trust: Robert Griesemer <gri@golang.org>
Trust: Dan Scales <danscales@google.com>
Reviewed-by: Dan Scales <danscales@google.com>
2021-10-28 00:11:24 +00:00
..
a.go cmd/compile/internal/types2: disallow lone type parameter on RHS of type declaration 2021-10-28 00:11:24 +00:00
main.go cmd/compile/internal/types2: disallow lone type parameter on RHS of type declaration 2021-10-28 00:11:24 +00:00