Data.Colour.CIE.Chromaticity:chromaCoords from colour-2.3.3

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\[\left(1 - x\right) - y \]
(FPCore (x y) :precision binary64 (- (- 1.0 x) y))
double code(double x, double y) {
	return (1.0 - x) - y;
}
real(8) function code(x, y)
    real(8), intent (in) :: x
    real(8), intent (in) :: y
    code = (1.0d0 - x) - y
end function
public static double code(double x, double y) {
	return (1.0 - x) - y;
}
def code(x, y):
	return (1.0 - x) - y
function code(x, y)
	return Float64(Float64(1.0 - x) - y)
end
function tmp = code(x, y)
	tmp = (1.0 - x) - y;
end
code[x_, y_] := N[(N[(1.0 - x), $MachinePrecision] - y), $MachinePrecision]
\left(1 - x\right) - y