Source file test/typeswitch2b.go

     1  // errorcheck
     2  
     3  // Copyright 2019 The Go Authors. All rights reserved.
     4  // Use of this source code is governed by a BSD-style
     5  // license that can be found in the LICENSE file.
     6  
     7  // Verify that various erroneous type switches are caught by the compiler.
     8  // Does not compile.
     9  
    10  package main
    11  
    12  func notused(x interface{}) {
    13  	// The first t is in a different scope than the 2nd t; it cannot
    14  	// be accessed (=> declared but not used error); but it is legal
    15  	// to declare it.
    16  	switch t := 0; t := x.(type) { // ERROR "declared but not used"
    17  	case int:
    18  		_ = t // this is using the t of "t := x.(type)"
    19  	}
    20  }
    21  

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