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Diffstat (limited to '')
-rw-r--r-- | test/typeswitch2b.go | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/test/typeswitch2b.go b/test/typeswitch2b.go new file mode 100644 index 0000000..135ae86 --- /dev/null +++ b/test/typeswitch2b.go @@ -0,0 +1,20 @@ +// errorcheck + +// Copyright 2019 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 by the compiler. +// Does not compile. + +package main + +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)" + } +} |