Display the source code in std/traits.d from which this page was generated on github.

If you spot a problem with this page, click here to create a Bugzilla issue.

Quickly fork, edit online, and submit a pull request for this page. Requires a signed-in GitHub account. This works well for small changes. If you'd like to make larger changes you may want to consider using local clone.

Enum member `std.traits.isEqualityComparable`

Detects whether T is a comparable type. Basic types and structs and classes that implement opCmp are ordering comparable.


						
				enum isEqualityComparable(T)
				 = is(typeof((ref T a) => a == a ? 1 : 0));

Example

static assert(isOrderingComparable!int);
static assert(isOrderingComparable!string);

static struct Foo {}
static assert(!isOrderingComparable!Foo);

static struct Bar
{
    int a;
    auto opCmp(Bar b1) const { return a - b1.a; }
}

Bar b1 = Bar(5);
Bar b2 = Bar(7);
assert(isOrderingComparable!Bar && b2 > b1);

Authors

Walter Bright, Tomasz Stachowiak (isExpressions), Andrei Alexandrescu, Shin Fujishiro, Robert Clipsham, David Nadlinger, Kenji Hara, Shoichi Kato

License

Boost License 1.0.