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Robert Griesemer bbc059572d cmd/compile/internal/types2: implement singleType and structure (type)
Rename structuralType to singleType throughout. This reflects
more closely what the function does: if a type set consists of
exactly one type term, singleType returns the corresponding type.

Rename singleUnder to structure. The structure function returns
the "type structure" of a type, either its underlying type for
a non-type parameter, or the single underlying type (if it exists)
for a type parameter.

Change constraint type inference to use the structure type for
inference, unless the structure type is the underlying type of
a single defined type, in which case it uses the latter. This
preserves existing behavior while making constraint type inference
slightly more flexible.

Change-Id: I38ee89ffdabd12bfeaa0be2ad6af8fb373c11fc9
Reviewed-on: https://go-review.googlesource.com/c/go/+/359015
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-10-27 20:25:06 +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 cmd/go: remove support for -buildmode=shared 2021-10-27 20:03:17 +00:00
lib/time lib/time: fix RFC 6557 url 2021-08-15 02:18:46 +00:00
misc cmd/go: remove support for -buildmode=shared 2021-10-27 20:03:17 +00:00
src cmd/compile/internal/types2: implement singleType and structure (type) 2021-10-27 20:25:06 +00:00
test cmd/compile: fix generic type handling when crawling inline body 2021-10-27 05:33:58 +00:00
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