4b7f7eef3f
Further simplify the unifier by using a mapping from type parameter to type (argument) handle, where a handle is just an indirection to the actual type associated with the type parameter. If multiple type parameters are "joined", i.e., share the same type (argument), then they use the same handle. Thus, if one of the type parameters gets a type, all type parameters sharing the same handle get the same type. The handles mapping replaces the indices list (mapping from type parameter index to types index). Because each handle holds any associated type directly, we also don't need a types list anymore. We still keep the incoming type parameter list to maintain the same order for printing and reporting inferred types. We may be able to eliminate this list as well in future CLs. Change-Id: I389527dbb325b828c91050e59902ae546c3d0347 Reviewed-on: https://go-review.googlesource.com/c/go/+/463228 Reviewed-by: Robert Findley <rfindley@google.com> Reviewed-by: Robert Griesemer <gri@google.com> Auto-Submit: Robert Griesemer <gri@google.com> Run-TryBot: Robert Griesemer <gri@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> |
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