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Function std.math.isInfinity
Determines if x
is ±∞.
Prototype
bool isInfinity(X)( X x ) pure nothrow @nogc @trusted if (isFloatingPoint!X);
params
x
= a floating point number.
returns
true
if x
is ±∞.
Example
assert(!isInfinity(float.init)); assert(!isInfinity(-float.init)); assert(!isInfinity(float.nan)); assert(!isInfinity(-float.nan)); assert(isInfinity(float.infinity)); assert(isInfinity(-float.infinity)); assert(isInfinity(-1.0f / 0.0f));
Authors
Walter Bright, Don Clugston, Conversion of CEPHES math library to D by Iain Buclaw