gcc/testsuite/go.test/test/assign.go

   1 // errorcheck
   2
   3 // Copyright 2009 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 simple assignment errors are caught by the compiler.
   8 // Does not compile.
   9
  10 package main
  11
  12 import "sync"
  13
  14 type T struct {
  15         int
  16         sync.Mutex
  17 }
  18
  19 func main() {
  20         {
  21                 var x, y sync.Mutex
  22                 x = y // ok
  23                 _ = x
  24         }
  25         {
  26                 var x, y T
  27                 x = y // ok
  28                 _ = x
  29         }
  30         {
  31                 var x, y [2]sync.Mutex
  32                 x = y // ok
  33                 _ = x
  34         }
  35         {
  36                 var x, y [2]T
  37                 x = y // ok
  38                 _ = x
  39         }
  40         {
  41                 x := sync.Mutex{0, 0} // ERROR "assignment.*Mutex"
  42                 _ = x
  43         }
  44         {
  45                 x := sync.Mutex{key: 0} // ERROR "(unknown|assignment).*Mutex"
  46                 _ = x
  47         }
  48         {
  49                 x := &sync.Mutex{} // ok
  50                 var y sync.Mutex   // ok
  51                 y = *x             // ok
  52                 *x = y             // ok
  53                 _ = x
  54                 _ = y
  55         }
  56 }