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Function `std.math.nextPow2`

Gives the next power of two after val. T can be any built-in numerical type.


						
				T nextPow2(T)
				(
				

				  const T val
				

				)
				

				if (isIntegral!T);
				

				

				T nextPow2(T)
				(
				

				  const T val
				

				)
				

				if (isFloatingPoint!T);

If the operation would lead to an over/underflow, this function will return 0.

Parameters

Name	Description
val	any number

Returns

the next power of two after val

Example

writeln(nextPow2(2)); // 4
writeln(nextPow2(10)); // 16
writeln(nextPow2(4000)); // 4096

writeln(nextPow2(-2)); // -4
writeln(nextPow2(-10)); // -16

writeln(nextPow2(uint.max)); // 0
writeln(nextPow2(uint.min)); // 0
writeln(nextPow2(size_t.max)); // 0
writeln(nextPow2(size_t.min)); // 0

writeln(nextPow2(int.max)); // 0
writeln(nextPow2(int.min)); // 0
writeln(nextPow2(long.max)); // 0
writeln(nextPow2(long.min)); // 0

Example

writeln(nextPow2(2.1)); // 4.0
writeln(nextPow2(-2.0)); // -4.0
writeln(nextPow2(0.25)); // 0.5
writeln(nextPow2(-4.0)); // -8.0

writeln(nextPow2(double.max)); // 0.0
writeln(nextPow2(double.infinity)); // double.infinity

Authors

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

License

Boost License 1.0.

API Documentation

Function std.math.nextPow2

Parameters

Returns

Example

Example

Authors

License

Function `std.math.nextPow2`