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version 2.083.0

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Function std.typecons.NullableRef.isNull

Returns true if and only if this is in the null state.

bool isNull() const pure nothrow @property @safe;

Returns

true if this is in the null state, otherwise false.

Example

NullableRef!int nr;
assert(nr.isNull);

int* n = new int(42);
nr.bind(n);
assert(!nr.isNull && nr == 42);

Authors

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

License

Boost License 1.0.