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26 lines
596 B
Go
26 lines
596 B
Go
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// Copyright 2010 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package cmplx
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import "math"
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// IsNaN returns true if either real(x) or imag(x) is NaN
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// and neither is an infinity.
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func IsNaN(x complex128) bool {
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switch {
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case math.IsInf(real(x), 0) || math.IsInf(imag(x), 0):
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return false
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case math.IsNaN(real(x)) || math.IsNaN(imag(x)):
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return true
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}
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return false
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}
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// NaN returns a complex ``not-a-number'' value.
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func NaN() complex128 {
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nan := math.NaN()
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return complex(nan, nan)
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}
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