go typeswitch2b 源码
golang typeswitch2b 代码
文件路径：/test/typeswitch2b.go
// 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 but not used error); but it is legal
// to declare it.
switch t := 0; t := x.(type) { // ERROR "declared but not used"
case int:
_ = t // this is using the t of "t := x.(type)"
}
}
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