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 { 57 var x = 1 58 { 59 x, x := 2, 3 // ERROR "x repeated on left side of :=" 60 _ = x 61 } 62 _ = x 63 } 64 { 65 a, a := 1, 2 // ERROR "a repeated on left side of :=" 66 _ = a 67 } 68 } 69
