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Function std.math.NaN

Create a quiet NAN, storing an integer inside the payload.

real NaN (
  ulong payload
) pure nothrow @nogc @trusted;

For floats, the largest possible payload is 0x3F_FFFF. For doubles, it is 0x3_FFFF_FFFF_FFFF. For 80-bit or 128-bit reals, it is 0x3FFF_FFFF_FFFF_FFFF.


real a = NaN(1_000_000);
writeln(getNaNPayload(a)); // 1_000_000


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


Boost License 1.0.