1// run
2
3// Copyright 2014 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 order of calls to builtin functions.
8// Discovered during CL 144530045 review.
9
10package main
11
12func main() {
13	// append
14	{
15		x := make([]int, 0)
16		f := func() int { x = make([]int, 2); return 2 }
17		a, b, c := append(x, 1), f(), append(x, 1)
18		if len(a) != 1 || len(c) != 3 {
19			bug()
20			println("append call not ordered:", len(a), b, len(c))
21		}
22	}
23
24	// cap
25	{
26		x := make([]int, 1)
27		f := func() int { x = make([]int, 3); return 2 }
28		a, b, c := cap(x), f(), cap(x)
29		if a != 1 || c != 3 {
30			bug()
31			println("cap call not ordered:", a, b, c)
32		}
33	}
34
35	// complex
36	{
37		x := 1.0
38		f := func() int { x = 3; return 2 }
39		a, b, c := complex(x, 0), f(), complex(x, 0)
40		if real(a) != 1 || real(c) != 3 {
41			bug()
42			println("complex call not ordered:", a, b, c)
43		}
44	}
45
46	// copy
47	{
48		tmp := make([]int, 100)
49		x := make([]int, 1)
50		f := func() int { x = make([]int, 3); return 2 }
51		a, b, c := copy(tmp, x), f(), copy(tmp, x)
52		if a != 1 || c != 3 {
53			bug()
54			println("copy call not ordered:", a, b, c)
55		}
56	}
57
58	// imag
59	{
60		x := 1i
61		f := func() int { x = 3i; return 2 }
62		a, b, c := imag(x), f(), imag(x)
63		if a != 1 || c != 3 {
64			bug()
65			println("imag call not ordered:", a, b, c)
66		}
67	}
68
69	// len
70	{
71		x := make([]int, 1)
72		f := func() int { x = make([]int, 3); return 2 }
73		a, b, c := len(x), f(), len(x)
74		if a != 1 || c != 3 {
75			bug()
76			println("len call not ordered:", a, b, c)
77		}
78	}
79
80	// make
81	{
82		x := 1
83		f := func() int { x = 3; return 2 }
84		a, b, c := make([]int, x), f(), make([]int, x)
85		if len(a) != 1 || len(c) != 3 {
86			bug()
87			println("make call not ordered:", len(a), b, len(c))
88		}
89	}
90
91	// real
92	{
93		x := 1 + 0i
94		f := func() int { x = 3; return 2 }
95		a, b, c := real(x), f(), real(x)
96		if a != 1 || c != 3 {
97			bug()
98			println("real call not ordered:", a, b, c)
99		}
100	}
101}
102
103var bugged = false
104
105func bug() {
106	if !bugged {
107		println("BUG")
108		bugged = true
109	}
110}