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Robert Griesemer d2b512160e cmd/compile/internal/types2: differently named types are not assignable
When checking assignability, a value of a named type (incl. a type parameter)
can never be assigned to a variable of a differently named type. Specifically,
if the types are two differently named type parameters, then values of one are
never assignable to variables of the other.

This CL clarifies the assignabiliy rules and simplifies the implementation.

Fixes #49242.

Change-Id: Id72a2c9bed5cdb726855e7a707137db1009e7953
Reviewed-on: https://go-review.googlesource.com/c/go/+/360274
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-11-01 15:55:20 +00:00
.github .github: update IRC server 2021-09-30 19:56:27 +00:00
api cmd/go: stamp VCS revision and uncommitted status into binaries 2021-10-14 18:44:37 +00:00
doc Revert "cmd/go: remove support for -buildmode=shared" 2021-10-29 17:32:24 +00:00
lib/time lib/time: fix RFC 6557 url 2021-08-15 02:18:46 +00:00
misc Revert "cmd/go: remove support for -buildmode=shared" 2021-10-29 17:32:24 +00:00
src cmd/compile/internal/types2: differently named types are not assignable 2021-11-01 15:55:20 +00:00
test test/codegen: updated arithmetic tests to verify on ppc64,ppc64le 2021-11-01 13:12:37 +00:00
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