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This is a general operation on IR nodes, so it belongs in ir. The copied implementation is adapted to support the extension pattern, allowing nodes to implement their own DeepCopy implementations if needed. This is the first step toward higher-level operations instead of Left, Right, etc. It will allow the new type syntax nodes to be properly immutable and opt out of those fine-grained methods. Passes buildall w/ toolstash -cmp. Change-Id: Ibd64061e01daf14aebc6586cb2eb2b12057ca85a Reviewed-on: https://go-review.googlesource.com/c/go/+/274102 Trust: Russ Cox <rsc@golang.org> Run-TryBot: Russ Cox <rsc@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com> |
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