1 files changed, 43 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/go.test/test/typeswitch3.go b/gcc-4.9/gcc/testsuite/go.test/test/typeswitch3.go
new file mode 100644
index 000000000..287e32e71
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/go.test/test/typeswitch3.go
@@ -0,0 +1,43 @@
+// errorcheck
+
+// Copyright 2011 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 erroneous type switches are caught be the compiler.
+// Issue 2700, among other things.
+// Does not compile.
+
+package main
+
+import (
+	"io"
+)
+
+type I interface {
+	M()
+}
+
+func main(){
+	var x I
+	switch x.(type) {
+	case string:	// ERROR "impossible"
+		println("FAIL")
+	}
+	
+	// Issue 2700: if the case type is an interface, nothing is impossible
+	
+	var r io.Reader
+	
+	_, _ = r.(io.Writer)
+	
+	switch r.(type) {
+	case io.Writer:
+	}
+	
+	// Issue 2827.
+	switch _ := r.(type) {  // ERROR "invalid variable name _|no new variables"
+	}
+}
+
+