description

# identityHashCode function

int identityHashCode(

1. Object? object

)

The identity hash code of `object`.

Returns the value that the original Object.hashCode would return on this object, even if `hashCode` has been overridden.

This hash code is compatible with identical, which means that it's guaranteed to give the same result every time it's passed the same argument, throughout a single program execution, for any non-record object.

The identity hash code of a Record is undefined, because a record doesn't have a guranteed persistent identity. A record values identity and identity hash code can change at any time.

    var identitySet = HashSet(equals: identical, hashCode: identityHashCode);
    var dt1 = DateTime.now();
    var dt2 = DateTime.fromMicrosecondsSinceEpoch(dt1.microsecondsSinceEpoch);
    assert(dt1 == dt2);
    identitySet.add(dt1);
    print(identitySet.contains(dt1)); // true
    print(identitySet.contains(dt2)); // false

## Implementation

    @pragma("vm:entry-point")
    external int identityHashCode(Object? object);