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This is a feature that is not understood well enough and may have subtle repercussions impacting future changes. Disable for Go 1.18. The actual change is trivial: disable a branch through a flag. The remaining changes are adjustments to tests. Fixes #51576. Change-Id: Ib77b038b846711a808315a8889b3904e72367bce Reviewed-on: https://go-review.googlesource.com/c/go/+/391135 Trust: Robert Griesemer <gri@golang.org> Run-TryBot: Robert Griesemer <gri@golang.org> Reviewed-by: Robert Findley <rfindley@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
59 lines
921 B
Go
59 lines
921 B
Go
// run
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// Copyright 2022 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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func main() {}
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// Field accesses through type parameters are disabled
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// until we have a more thorough understanding of the
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// implications on the spec. See issue #51576.
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/*
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import "fmt"
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type MyStruct struct {
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b1, b2 string
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E
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}
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type E struct {
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val int
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}
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type C interface {
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~struct {
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b1, b2 string
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E
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}
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}
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func f[T C]() T {
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var x T = T{
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b1: "a",
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b2: "b",
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}
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if got, want := x.b2, "b"; got != want {
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panic(fmt.Sprintf("got %d, want %d", got, want))
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}
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x.b1 = "y"
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x.val = 5
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return x
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}
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func main() {
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x := f[MyStruct]()
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if got, want := x.b1, "y"; got != want {
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panic(fmt.Sprintf("got %d, want %d", got, want))
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}
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if got, want := x.val, 5; got != want {
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panic(fmt.Sprintf("got %d, want %d", got, want))
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}
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}
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*/
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