std.math.traits

This is a submodule of std.math.

It contains several functions for introspection on numerical values.

Copyright

License

Boost License 1.0.

Authors

Walter Bright, Don Clugston,

Conversion of CEPHES math library to D by Iain Buclaw and David Nadlinger Source: std/math/traits.d

tmpl floatTraits

enum RealFormat

fn copysign isFinite isIdentical isInfinity isNaN isNormal isPowerOf2 isSubnormal sgn signbit

Types 1

enumRealFormat

ieeeHalf

ieeeSingle

ieeeDouble

ieeeExtended

ieeeExtended53

ibmExtended

ieeeQuadruple

Functions 11

fnbool isNaN(X)(X x) if (isFloatingPoint!(X)) @nogc @trusted pure nothrowDetermines if x is NaN. Params: x = a floating point number. Returns: `true` if x is Nan.

fnbool isFinite(X)(X x) @trusted pure nothrow @nogcDetermines if x is finite. Params: x = a floating point number. Returns: `true` if x is finite.

fnbool isNormal(X)(X x) @trusted pure nothrow @nogcDetermines if x is normalized.

fnbool isSubnormal(X)(X x) @trusted pure nothrow @nogcDetermines if x is subnormal.

fnbool isInfinity(X)(X x) if (isFloatingPoint!(X)) @nogc @trusted pure nothrowDetermines if x is . Params: x = a floating point number. Returns: `true` if x is .

fnbool isIdentical(real x, real y) @trusted pure nothrow @nogcIs the binary representation of x identical to y?

fnint signbit(X)(X x) @nogc @trusted pure nothrowReturn 1 if sign bit of e is set, 0 if not.

fnR copysign(R, X)(R to, X from) if (isFloatingPoint!(R) && isFloatingPoint!(X)) @trusted pure nothrow @nogcParams: to = the numeric value to use from = the sign value to use Returns: a value composed of to with from's sign bit.

fnR copysign(R, X)(X to, R from) if (isIntegral!(X) && isFloatingPoint!(R)) @trusted pure nothrow @nogcditto

fnF sgn(F)(F x) if (isFloatingPoint!F || isIntegral!F) @safe pure nothrow @nogcReturns `-1` if x < 0, `x` if x == 0, `1` if x > 0, and if x==.

fnbool isPowerOf2(X)(const X x) if (isNumeric!X) pure @safe nothrow @nogcCheck whether a number is an integer power of two.

Templates 1

tmplfloatTraits(T)