modernc.org/gc@v1.0.1-0.20240304020402-f0dba7c97c2b/testdata/errchk/test/switch4.go (about)

     1  // errorcheck
     2  
     3  // Copyright 2011 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 erroneous switch statements are detected by the compiler.
     8  // Does not compile.
     9  
    10  package main
    11  
    12  type I interface {
    13  	M()
    14  }
    15  
    16  func bad() {
    17  
    18  	i5 := 5
    19  	switch i5 {
    20  	case 5:
    21  		fallthrough // ERROR "cannot fallthrough final case in switch"
    22  	}
    23  }
    24  
    25  func good() {
    26  	var i interface{}
    27  	var s string
    28  
    29  	switch i {
    30  	case s:
    31  	}
    32  
    33  	switch s {
    34  	case i:
    35  	}
    36  }