1// run
2
3// Copyright 2020 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// assignment order in multiple assignments.
8// See issue #23017
9
10package main
11
12import "fmt"
13
14func main() {}
15
16func init() {
17	var m = map[int]int{}
18	var p *int
19
20	defer func() {
21		recover()
22		check(1, len(m))
23		check(42, m[2])
24	}()
25	m[2], *p = 42, 2
26}
27
28func init() {
29	var m = map[int]int{}
30	p := []int{}
31
32	defer func() {
33		recover()
34		check(1, len(m))
35		check(2, m[2])
36	}()
37	m[2], p[1] = 2, 2
38}
39
40func init() {
41	type P struct{ i int }
42	var m = map[int]int{}
43	var p *P
44
45	defer func() {
46		recover()
47		check(1, len(m))
48		check(3, m[2])
49	}()
50	m[2], p.i = 3, 2
51}
52
53func init() {
54	type T struct{ i int }
55	var x T
56	p := &x
57	p, p.i = new(T), 4
58	check(4, x.i)
59}
60
61func init() {
62	var m map[int]int
63	var a int
64	var p = &a
65
66	defer func() {
67		recover()
68		check(5, *p)
69	}()
70	*p, m[2] = 5, 2
71}
72
73var g int
74
75func init() {
76	var m map[int]int
77	defer func() {
78		recover()
79		check(0, g)
80	}()
81	m[0], g = 1, 2
82}
83
84func init() {
85	type T struct{ x struct{ y int } }
86	var x T
87	p := &x
88	p, p.x.y = new(T), 7
89	check(7, x.x.y)
90	check(0, p.x.y)
91}
92
93func init() {
94	type T *struct{ x struct{ y int } }
95	x := struct{ y int }{0}
96	var q T = &struct{ x struct{ y int } }{x}
97	p := q
98	p, p.x.y = nil, 7
99	check(7, q.x.y)
100}
101
102func init() {
103	x, y := 1, 2
104	x, y = y, x
105	check(2, x)
106	check(1, y)
107}
108
109func check(want, got int) {
110	if want != got {
111		panic(fmt.Sprintf("wanted %d, but got %d", want, got))
112	}
113}
114