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Function `std.typecons.Nullable.opCmp`

Compares two Nullable values.


						
				int opCmp(This, Rhs)(
				
  auto ref Rhs rhs
				

				)
				

				if (is(Rhs == Nullable!U, U) && is(typeof(this.get < rhs.get)));

- If one is null and the other is not, the null one is considered smaller. - If both are null, they are equal. - If both are non-null, compares the payloads.

Returns

Negative if this < rhs, zero if equal, positive if this > rhs.

Example

Basic Nullable comparison test

Nullable!int a = 5;
Nullable!int b = 0;
assert(a > b);
assert(b < a);

Nullable!int c;
assert(c < a);
assert(c < b);

Authors

Andrei Alexandrescu, Bartosz Milewski, Don Clugston, Shin Fujishiro, Kenji Hara

License

Boost License 1.0.