diff options
Diffstat (limited to 'gcc-4.9/gcc/testsuite/go.test/test/typeswitch2.go')
-rw-r--r-- | gcc-4.9/gcc/testsuite/go.test/test/typeswitch2.go | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/go.test/test/typeswitch2.go b/gcc-4.9/gcc/testsuite/go.test/test/typeswitch2.go new file mode 100644 index 000000000..6c703076a --- /dev/null +++ b/gcc-4.9/gcc/testsuite/go.test/test/typeswitch2.go @@ -0,0 +1,47 @@ +// errorcheck + +// 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. +// Does not compile. + +package main + +import "io" + +func whatis(x interface{}) string { + switch x.(type) { + case int: + return "int" + case int: // ERROR "duplicate" + return "int8" + case io.Reader: + return "Reader1" + case io.Reader: // ERROR "duplicate" + return "Reader2" + case interface { + r() + w() + }: + return "rw" + case interface { // GCCGO_ERROR "duplicate" + w() + r() + }: // GC_ERROR "duplicate" + return "wr" + + } + return "" +} + +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 + // to declare it. + switch t := 0; t := x.(type) { // ERROR "declared and not used" + case int: + _ = t // this is using the t of "t := x.(type)" + } +} |