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Function `std.math.signbit`

Return 1 if sign bit of e is set, 0 if not.


						
				int signbit(X)
				(
				

				  X x
				

				) pure nothrow @nogc @trusted;

Example

assert(!signbit(float.nan));
assert(signbit(-float.nan));
assert(!signbit(168.1234f));
assert(signbit(-168.1234f));
assert(!signbit(0.0f));
assert(signbit(-0.0f));
assert(signbit(-float.max));
assert(!signbit(float.max));

assert(!signbit(double.nan));
assert(signbit(-double.nan));
assert(!signbit(168.1234));
assert(signbit(-168.1234));
assert(!signbit(0.0));
assert(signbit(-0.0));
assert(signbit(-double.max));
assert(!signbit(double.max));

assert(!signbit(real.nan));
assert(signbit(-real.nan));
assert(!signbit(168.1234L));
assert(signbit(-168.1234L));
assert(!signbit(0.0L));
assert(signbit(-0.0L));
assert(signbit(-real.max));
assert(!signbit(real.max));

Authors

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

License

Boost License 1.0.