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cmd/compile/internal/syntax: minor cleanups in extractName
Backport the recommended changes suggested in CL 403937. Change-Id: I3ac29c90977e33899881838825da033627344ed2 Reviewed-on: https://go-review.googlesource.com/c/go/+/403853 Run-TryBot: Robert Griesemer <gri@google.com> Reviewed-by: Robert Findley <rfindley@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Robert Griesemer <gri@google.com>
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@ -683,14 +683,14 @@ func extractName(x Expr, force bool) (*Name, Expr) {
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}
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switch x.Op {
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case Mul:
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if name, _ := x.X.(*Name); name != nil && (isTypeElem(x.Y) || force) {
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if name, _ := x.X.(*Name); name != nil && (force || isTypeElem(x.Y)) {
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// x = name *x.Y
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op := *x
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op.X, op.Y = op.Y, nil // change op into unary *op.Y
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return name, &op
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}
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case Or:
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if name, lhs := extractName(x.X, isTypeElem(x.Y) || force); name != nil && lhs != nil { // note: lhs should never be nil
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if name, lhs := extractName(x.X, force || isTypeElem(x.Y)); name != nil && lhs != nil {
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// x = name lhs|x.Y
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op := *x
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op.X = lhs
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@ -699,7 +699,7 @@ func extractName(x Expr, force bool) (*Name, Expr) {
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}
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case *CallExpr:
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if name, _ := x.Fun.(*Name); name != nil {
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if len(x.ArgList) == 1 && !x.HasDots && (isTypeElem(x.ArgList[0]) || force) {
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if len(x.ArgList) == 1 && !x.HasDots && (force || isTypeElem(x.ArgList[0])) {
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// x = name "(" x.ArgList[0] ")"
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return name, x.ArgList[0]
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}
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