diff options
Diffstat (limited to 'test/typeparam/issue47925b.go')
-rw-r--r-- | test/typeparam/issue47925b.go | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/test/typeparam/issue47925b.go b/test/typeparam/issue47925b.go new file mode 100644 index 0000000..bffbe4e --- /dev/null +++ b/test/typeparam/issue47925b.go @@ -0,0 +1,33 @@ +// run + +// 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 + +type I[T any] interface { + foo() +} + +type E[T any] interface { +} + +//go:noinline +func f[T I[T]](x T) E[T] { + // contains a cast from nonempty to empty interface + return E[T](I[T](x)) +} + +type S struct { + x int +} + +func (s *S) foo() {} + +func main() { + i := f(&S{x: 7}) + if i.(*S).x != 7 { + panic("bad") + } +} |