mirror of
https://github.com/golang/go
synced 2024-11-07 15:36:23 -07:00
5d6d9f5610
Use types2.Structure() to get single underlying type of typeparams, to handle some unusual cases where a type param is constrained to a single underlying struct or map type. Fixes #48538 Change-Id: I289fb7b31d489f7586f2b04aeb1df74e15a9f965 Reviewed-on: https://go-review.googlesource.com/c/go/+/359335 Trust: Dan Scales <danscales@google.com> Run-TryBot: Dan Scales <danscales@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Robert Griesemer <gri@golang.org>
61 lines
795 B
Go
61 lines
795 B
Go
// compile -G=3
|
|
|
|
// Copyright 2021 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// Testing composite literal for a type param constrained to be a struct or a map.
|
|
|
|
package p
|
|
|
|
type C interface {
|
|
~struct{ b1, b2 string }
|
|
}
|
|
|
|
func f[T C]() T {
|
|
return T{
|
|
b1: "a",
|
|
b2: "b",
|
|
}
|
|
}
|
|
|
|
func f2[T ~struct{ b1, b2 string }]() T {
|
|
return T{
|
|
b1: "a",
|
|
b2: "b",
|
|
}
|
|
}
|
|
|
|
type D interface {
|
|
map[string]string | S
|
|
}
|
|
|
|
type S map[string]string
|
|
|
|
func g[T D]() T {
|
|
b1 := "foo"
|
|
b2 := "bar"
|
|
return T{
|
|
b1: "a",
|
|
b2: "b",
|
|
}
|
|
}
|
|
|
|
func g2[T map[string]string]() T {
|
|
b1 := "foo"
|
|
b2 := "bar"
|
|
return T{
|
|
b1: "a",
|
|
b2: "b",
|
|
}
|
|
}
|
|
|
|
func g3[T S]() T {
|
|
b1 := "foo"
|
|
b2 := "bar"
|
|
return T{
|
|
b1: "a",
|
|
b2: "b",
|
|
}
|
|
}
|