1// Copyright 2017 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package cgotest
6
7// Issue 21809.  Compile C `typedef` to go type aliases.
8
9// typedef long MySigned_t;
10// /* tests alias-to-alias */
11// typedef MySigned_t MySigned2_t;
12//
13// long takes_long(long x) { return x * x; }
14// MySigned_t takes_typedef(MySigned_t x) { return x * x; }
15import "C"
16
17import "testing"
18
19func test21809(t *testing.T) {
20	longVar := C.long(3)
21	typedefVar := C.MySigned_t(4)
22	typedefTypedefVar := C.MySigned2_t(5)
23
24	// all three should be considered identical to `long`
25	if ret := C.takes_long(longVar); ret != 9 {
26		t.Errorf("got %v but expected %v", ret, 9)
27	}
28	if ret := C.takes_long(typedefVar); ret != 16 {
29		t.Errorf("got %v but expected %v", ret, 16)
30	}
31	if ret := C.takes_long(typedefTypedefVar); ret != 25 {
32		t.Errorf("got %v but expected %v", ret, 25)
33	}
34
35	// They should also be identical to the typedef'd type
36	if ret := C.takes_typedef(longVar); ret != 9 {
37		t.Errorf("got %v but expected %v", ret, 9)
38	}
39	if ret := C.takes_typedef(typedefVar); ret != 16 {
40		t.Errorf("got %v but expected %v", ret, 16)
41	}
42	if ret := C.takes_typedef(typedefTypedefVar); ret != 25 {
43		t.Errorf("got %v but expected %v", ret, 25)
44	}
45}
46