1// errorcheck
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// Test "cannot assign" errors
8
9package main
10
11func main() {
12	var s string = "hello"
13	s[1:2] = "a" // ERROR "cannot assign to .* (\(strings are immutable\))?"
14	s[3] = "b"   // ERROR "cannot assign to .* (\(strings are immutable\))?"
15
16	const n int = 1
17	const cs string = "hello"
18	n = 2        // ERROR "cannot assign to .* (\(declared const\))?"
19	cs = "hi"    // ERROR "cannot assign to .* (\(declared const\))?"
20	true = false // ERROR "cannot assign to .* (\(declared const\))?"
21
22	var m map[int]struct{ n int }
23	m[0].n = 7 // ERROR "cannot assign to struct field .* in map$"
24
25	1 = 7         // ERROR "cannot assign to 1"
26	"hi" = 7      // ERROR `cannot assign to "hi"`
27	nil = 7       // ERROR "cannot assign to nil"
28	len("") = 7   // ERROR `cannot assign to len\(""\)`
29	[]int{} = nil // ERROR "cannot assign to \[\]int\{\}"
30
31	var x int = 7
32	x + 1 = 7 // ERROR "cannot assign to x \+ 1"
33}
34