go issue40789 源码
golang issue40789 代码
文件路径：/src/cmd/compile/internal/types2/testdata/fixedbugs/issue40789.go
// 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.
package main
import "fmt"
func main() {
m := map[string]int{
"a": 6,
"b": 7,
}
fmt.Println(copyMap[map[string]int, string, int](m))
}
type Map[K comparable, V any] interface {
map[K] V
}
func copyMap[M Map[K, V], K comparable, V any](m M) M {
m1 := make(M)
for k, v := range m {
m1[k] = v
}
return m1
}
// simpler test case from the same issue
type A[X comparable] interface {
[]X
}
func f[B A[X], X comparable]() B {
return nil
}
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