文件操作 - typeswitch2b.go
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文件: /usr/share/go-1.23/test/typeswitch2b.go
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// 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)" } }
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