1// errorcheck
2
3// Copyright 2017 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 that copy arguments requirements are enforced by the
8// compiler.
9
10package main
11
12func main() {
13
14	si := make([]int, 8)
15	sf := make([]float64, 8)
16
17	_ = copy()        // ERROR "not enough arguments"
18	_ = copy(1, 2, 3) // ERROR "too many arguments"
19
20	_ = copy(si, "hi") // ERROR "have different element types(.*int.*string| int and byte)"
21	_ = copy(si, sf)   // ERROR "have different element types.*int.*float64"
22
23	_ = copy(1, 2)  // ERROR "must be slices; have int, int|expects slice arguments"
24	_ = copy(1, si) // ERROR "first argument to copy should be|expects slice arguments"
25	_ = copy(si, 2) // ERROR "second argument to copy should be|expects slice arguments"
26
27}
28