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Function `std.math.nextUp`

Calculate the next largest floating point value after x.


						
				real nextUp
				(
				

				  real x
				

				) pure nothrow @nogc @trusted;
				

				

				double nextUp
				(
				

				  double x
				

				) pure nothrow @nogc @trusted;
				

				

				float nextUp
				(
				

				  float x
				

				) pure nothrow @nogc @trusted;

Return the least number greater than x that is representable as a real; thus, it gives the next point on the IEEE number line.

Special Values
x	nextUp(x)
-∞	-real.max
±0.0	real.min_normal*real.epsilon
real.max	∞
∞	∞
NAN	NAN

Example

assert(nextUp(1.0 - 1.0e-6).feqrel(0.999999) > 16);
assert(nextUp(1.0 - real.epsilon).feqrel(1.0) > 16);

Authors

Walter Bright, Don Clugston, Conversion of CEPHES math library to D by Iain Buclaw and David Nadlinger

License

Boost License 1.0.