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Function `std.typecons.Tuple.opCmp`

Comparison for ordering.


						
				auto opCmp(R)
				(
				

				  R rhs
				

				)
				

				if (areCompatibleTuples!(typeof(this), R, "<"));
				

				

				auto opCmp(R)
				(
				

				  R rhs
				

				) const
				

				if (areCompatibleTuples!(typeof(this), R, "<"));

Parameters

Name	Description
rhs	The `Tuple` to compare against. It must meet the criteria for comparison between `Tuple`s.

Returns

For any values v1 contained by the left-hand side tuple and any values v2 contained by the right-hand side:

0 if v1 == v2 for all members or the following value for the first position were the mentioned criteria is not satisfied:

NaN, in case one of the operands is a NaN.
A negative number if the expression v1 < v2 is true.
A positive number if the expression v1 > v2 is true.

Example

The first v1 for which v1 > v2 is true determines the result. This could lead to unexpected behaviour.

auto tup1 = tuple(1, 1, 1);
auto tup2 = tuple(1, 100, 100);
assert(tup1 < tup2);

//Only the first result matters for comparison
tup1[0] = 2;
assert(tup1 > tup2);

Authors

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

License

Boost License 1.0.