go isnan 源码
golang isnan 代码
文件路径：/src/math/cmplx/isnan.go
// 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.
package cmplx
import "math"
// IsNaN reports whether either real(x) or imag(x) is NaN
// and neither is an infinity.
func IsNaN(x complex128) bool {
switch {
case math.IsInf(real(x), 0) || math.IsInf(imag(x), 0):
return false
case math.IsNaN(real(x)) || math.IsNaN(imag(x)):
return true
}
return false
}
// NaN returns a complex “not-a-number” value.
func NaN() complex128 {
nan := math.NaN()
return complex(nan, nan)
}
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