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 main() {
32	// ok
33	c64 = complex(f32, f32)
34	c128 = complex(f64, f64)
35
36	_ = complex128(0)     // ok
37	_ = complex(f32, f64) // ERROR "complex"
38	_ = complex(f64, f32) // ERROR "complex"
39	_ = complex(f32, F32) // ERROR "complex"
40	_ = complex(F32, f32) // ERROR "complex"
41	_ = complex(f64, F64) // ERROR "complex"
42	_ = complex(F64, f64) // ERROR "complex"
43
44	c128 = complex(f32, f32) // ERROR "cannot use"
45	c64 = complex(f64, f64)  // ERROR "cannot use"
46
47	c64 = complex(1.0, 2.0) // ok, constant is untyped
48	c128 = complex(1.0, 2.0)
49	C64 = complex(1.0, 2.0)
50	C128 = complex(1.0, 2.0)
51
52	C64 = complex(f32, f32)  // ERROR "cannot use"
53	C128 = complex(f64, f64) // ERROR "cannot use"
54}
55