1// errorcheck
2
3// Copyright 2010 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 incorrect invocations of the complex predeclared function are detected.
8// Does not compile.
9
10package main
11
12type (
13	Float32    float32
14	Float64    float64
15	Complex64  complex64
16	Complex128 complex128
17)
18
19var (
20	f32 float32
21	f64 float64
22	F32 Float32
23	F64 Float64
24
25	c64  complex64
26	c128 complex128
27	C64  Complex64
28	C128 Complex128
29)
30
31func F1() int {
32	return 1
33}
34
35func F3() (int, int, int) {
36	return 1, 2, 3
37}
38
39func main() {
40	// ok
41	c64 = complex(f32, f32)
42	c128 = complex(f64, f64)
43
44	_ = complex128(0)     // ok
45	_ = complex(f32, f64) // ERROR "complex"
46	_ = complex(f64, f32) // ERROR "complex"
47	_ = complex(f32, F32) // ERROR "complex"
48	_ = complex(F32, f32) // ERROR "complex"
49	_ = complex(f64, F64) // ERROR "complex"
50	_ = complex(F64, f64) // ERROR "complex"
51
52	_ = complex(F1()) // ERROR "not enough arguments"
53	_ = complex(F3()) // ERROR "too many arguments"
54
55	_ = complex() // ERROR "not enough arguments"
56
57	c128 = complex(f32, f32) // ERROR "cannot use"
58	c64 = complex(f64, f64)  // ERROR "cannot use"
59
60	c64 = complex(1.0, 2.0) // ok, constant is untyped
61	c128 = complex(1.0, 2.0)
62	C64 = complex(1.0, 2.0)
63	C128 = complex(1.0, 2.0)
64
65	C64 = complex(f32, f32)  // ERROR "cannot use"
66	C128 = complex(f64, f64) // ERROR "cannot use"
67
68}
69