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go/test/ken/cplx3.go
Rob Pike eb37b5b744 test: document ken/*.go
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5694065
2012-02-24 16:24:24 +11:00

55 lines
888 B
Go

// run
// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Test composition, decomposition, and reflection on complex numbers.
package main
import "unsafe"
import "reflect"
const (
R = 5
I = 6i
C1 = R + I // ADD(5,6)
)
func main() {
c0 := C1
c0 = (c0 + c0 + c0) / (c0 + c0 + 3i)
r, i := real(c0), imag(c0)
d := r - 1.292308
if d < 0 {
d = - d
}
if d > 1e-6 {
println(r, "!= 1.292308")
panic(0)
}
d = i + 0.1384615
if d < 0 {
d = - d
}
if d > 1e-6 {
println(i, "!= -0.1384615")
panic(0)
}
c := *(*complex128)(unsafe.Pointer(&c0))
if c != c0 {
println(c, "!=", c)
panic(0)
}
var a interface{}
switch c := reflect.ValueOf(a); c.Kind() {
case reflect.Complex64, reflect.Complex128:
v := c.Complex()
_, _ = complex128(v), true
}
}