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https://github.com/golang/go
synced 2024-11-22 18:34:51 -07:00
b24ec88bb9
This CL changes the compiler's type import/export logic to create and preserve materialized Alias types when GODEBUG=gotypesaliases=1. In conjunction with CL 574717, it allows the x/tools tests to pass with GODEBUG=gotypesaliases=1. Updates #65294 Updates #64581 Fixes #66550 Change-Id: I70b9279f4e0ae7a1f95ad153c4e6909a878915a4 Reviewed-on: https://go-review.googlesource.com/c/go/+/574737 Auto-Submit: Alan Donovan <adonovan@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Robert Findley <rfindley@google.com> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
51 lines
801 B
Go
51 lines
801 B
Go
// run
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// Copyright 2021 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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import (
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"fmt"
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)
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type E[T any] struct {
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v T
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}
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type S1 struct {
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E[int]
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v string
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}
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type Eint = E[int]
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type Ebool = E[bool]
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type Eint2 = Eint
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type S2 struct {
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Eint
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Ebool
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v string
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}
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type S3 struct {
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*E[int]
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}
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func main() {
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s1 := S1{Eint{2}, "foo"}
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if got, want := s1.E.v, 2; got != want {
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panic(fmt.Sprintf("got %d, want %d", got, want))
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}
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s2 := S2{Eint{3}, Ebool{true}, "foo"}
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if got, want := s2.Eint.v, 3; got != want {
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panic(fmt.Sprintf("got %d, want %d", got, want))
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}
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var s3 S3
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s3.E = &Eint{4}
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if got, want := s3.E.v, 4; 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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