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https://github.com/golang/go
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b8248fab89
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>
147 lines
1.5 KiB
Go
147 lines
1.5 KiB
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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type Sf struct {
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f int
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}
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func f0[P Sf](p P) {
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_ = p.f
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p.f = 0
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}
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func f0t[P ~struct{ f int }](p P) {
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_ = p.f
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p.f = 0
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}
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var _ = f0[Sf]
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var _ = f0t[Sf]
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func f1[P interface {
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~struct{ f int }
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m()
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}](p P) {
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_ = p.f
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p.f = 0
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p.m()
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}
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var _ = f1[Sfm]
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type Sm struct{}
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func (Sm) m() {}
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type Sfm struct {
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f int
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}
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func (Sfm) m() {}
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func f2[P interface {
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Sfm
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m()
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}](p P) {
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_ = p.f
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p.f = 0
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p.m()
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}
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var _ = f2[Sfm]
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// special case: core type is a named pointer type
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type PSfm *Sfm
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func f3[P interface{ PSfm }](p P) {
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_ = p.f
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p.f = 0
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}
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var _ = f3[PSfm]
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// special case: core type is an unnamed pointer type
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func f4[P interface{ *Sfm }](p P) {
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_ = p.f
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p.f = 0
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}
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var _ = f4[*Sfm]
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type A int
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type B int
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type C float64
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type Int interface {
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*Sf | A
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*Sf | B
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}
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func f5[P Int](p P) {
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_ = p.f
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p.f = 0
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}
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var _ = f5[*Sf]
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type Int2 interface {
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*Sf | A
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any
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*Sf | C
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}
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func f6[P Int2](p P) {
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_ = p.f
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p.f = 0
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}
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var _ = f6[*Sf]
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type Int3 interface {
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Sf
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~struct{ f int }
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}
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func f7[P Int3](p P) {
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_ = p.f
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p.f = 0
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}
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var _ = f7[Sf]
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type Em1 interface {
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*Sf | A
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}
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type Em2 interface {
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*Sf | B
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}
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type Int4 interface {
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Em1
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Em2
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any
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}
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func f8[P Int4](p P) {
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_ = p.f
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p.f = 0
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}
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var _ = f8[*Sf]
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*/
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