blob: 112614e562c683bd6320ce223b8ffa36180d6dbb (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
// Copyright 2013 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.
// This file contains tests for the useless-assignment checker.
package assign
import "math/rand"
type ST struct {
x int
l []int
}
func (s *ST) SetX(x int, ch chan int) {
// Accidental self-assignment; it should be "s.x = x"
x = x // ERROR "self-assignment of x to x"
// Another mistake
s.x = s.x // ERROR "self-assignment of s.x to s.x"
s.l[0] = s.l[0] // ERROR "self-assignment of s.l.0. to s.l.0."
// Bail on any potential side effects to avoid false positives
s.l[num()] = s.l[num()]
rng := rand.New(rand.NewSource(0))
s.l[rng.Intn(len(s.l))] = s.l[rng.Intn(len(s.l))]
s.l[<-ch] = s.l[<-ch]
}
func num() int { return 2 }
|
