github.com/tcnksm/go@v0.0.0-20141208075154-439b32936367/misc/cgo/test/issue8694.go (about)

     1  // Copyright 2014 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  
     5  package cgotest
     6  
     7  /*
     8  #include <complex.h>
     9  
    10  complex float complexFloatSquared(complex float a) { return a*a; }
    11  complex double complexDoubleSquared(complex double a) { return a*a; }
    12  */
    13  import "C"
    14  
    15  import "testing"
    16  
    17  func test8694(t *testing.T) {
    18  	// Really just testing that this compiles, but check answer anyway.
    19  	x := complex64(2 + 3i)
    20  	x2 := x * x
    21  	cx2 := C.complexFloatSquared(x)
    22  	if cx2 != x2 {
    23  		t.Errorf("C.complexFloatSquared(%v) = %v, want %v", x, cx2, x2)
    24  	}
    25  
    26  	y := complex128(2 + 3i)
    27  	y2 := y * y
    28  	cy2 := C.complexDoubleSquared(y)
    29  	if cy2 != y2 {
    30  		t.Errorf("C.complexDoubleSquared(%v) = %v, want %v", y, cy2, y2)
    31  	}
    32  }