| // Copyright 2009 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. |
| // Verify that various erroneous type switches are caught be the compiler. |
| func whatis(x interface{}) string { |
| case int: // ERROR "duplicate" |
| case io.Reader: // ERROR "duplicate" |
| case interface { // GCCGO_ERROR "duplicate" |
| }: // GC_ERROR "duplicate" |
| func notused(x interface{}) { |
| // The first t is in a different scope than the 2nd t; it cannot |
| // be accessed (=> declared and not used error); but it is legal |
| switch t := 0; t := x.(type) { // ERROR "declared and not used" |
| _ = t // this is using the t of "t := x.(type)" |