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Diffstat (limited to 'test/typeparam/issue53477.go')
-rw-r--r-- | test/typeparam/issue53477.go | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/test/typeparam/issue53477.go b/test/typeparam/issue53477.go new file mode 100644 index 0000000..d128a7e --- /dev/null +++ b/test/typeparam/issue53477.go @@ -0,0 +1,34 @@ +// run + +// Copyright 2022 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. + +// Test that generic interface-interface comparisons resulting from +// value switch statements are handled correctly. + +package main + +func main() { + f[X](0) +} + +type Mer[T any] interface{ M(T) } +type MNer[T any] interface { + Mer[T] + N() +} + +type X int + +func (X) M(X) {} +func (X) N() {} + +func f[T MNer[T]](t T) { + switch Mer[T](t) { + case MNer[T](t): + // ok + default: + panic("FAIL") + } +} |