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cmd/compile: simplify OPTRLIT handling

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Previously, we would recognize &(T{...}) expressions during type
checking, rewrite them into (*T){...}, and then do a lot of extra work
to make sure the user doesn't write (*T){...} themselves and
resynthesizing the OPTRLIT later on.

This CL simply handles &T{...} directly in the straight forward
manner, by changing OADDR directly to OPTRLIT when appropriate.

While here, match go/types's invalid composite literal type error
message.

Passes toolstash-check.

Change-Id: I902b14c7e2cd9fa93e6915dd58272d2352ba38f8
Reviewed-on: https://go-review.googlesource.com/c/go/+/197120
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
This commit is contained in:
Matthew Dempsky 2019-09-25 00:21:23 -07:00
parent 87e2b34f7b
commit 00b773a4a9
7 changed files with 67 additions and 113 deletions
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8
src/cmd/compile/internal/gc/fmt.go
View file

@ -1304,12 +1304,8 @@ func (n *Node) exprfmt(s fmt.State, prec int, mode fmtMode) {
case OCOMPLIT:
if mode == FErr {
if n.Right != nil && n.Right.Type != nil && !n.Implicit() {
if n.Right.Implicit() && n.Right.Type.IsPtr() {
mode.Fprintf(s, "&%v literal", n.Right.Type.Elem())
return
}
mode.Fprintf(s, "%v literal", n.Right.Type)
if n.Right != nil {
mode.Fprintf(s, "%v literal", n.Right)
return
}