Nullable

class Nullable : INullable (

T

) {

static Nullable!U of(U value);

static Nullable!U ofNullable(U value);

static Nullable!U empty();

TypeInfo valueType();

alias payload = value;

bool isNull();

bool isPresent();

void ifPresent(Consumer!T action);

bool opEquals(IObject o);

bool opEquals(T v);

bool opEquals(const(Object) o);

string toString();

size_t toHash();

}

Constructors

this this(): Undocumented in source.
this this(T v): Undocumented in source.

Alias This

Members

Aliases

payload alias payload = value: Undocumented in source.

Functions

get T get(): If a value is present, returns the value, otherwise throws {@code NoSuchElementException}.
ifPresent void ifPresent(Consumer!T action): If a value is present, performs the given action with the value, otherwise does nothing.
isNull bool isNull(): Undocumented in source. Be warned that the author may not have intended to support it.
isPresent bool isPresent(): If a value is present, returns {@code true}, otherwise {@code false}.
opEquals bool opEquals(IObject o): Undocumented in source. Be warned that the author may not have intended to support it.
opEquals bool opEquals(T v): Undocumented in source. Be warned that the author may not have intended to support it.
opEquals bool opEquals(const(Object) o): Undocumented in source. Be warned that the author may not have intended to support it.
toHash size_t toHash(): Undocumented in source. Be warned that the author may not have intended to support it.
toString string toString(): Undocumented in source. Be warned that the author may not have intended to support it.
value T value(): Undocumented in source. Be warned that the author may not have intended to support it.
valueType TypeInfo valueType(): Undocumented in source. Be warned that the author may not have intended to support it.

Static functions

empty Nullable!U empty(): Returns an empty {@code Nullable} instance. No value is present for this {@code Nullable}.
of Nullable!U of(U value): Returns an {@code Nullable} describing the given non-{@code null} value.
ofNullable Nullable!U ofNullable(U value): Returns an {@code Nullable} describing the given value, if non-{@code null}, otherwise returns an empty {@code Nullable}.

Variables

_value T _value;: Undocumented in source.

Inherited Members

From INullable

valueType TypeInfo valueType(): Undocumented in source.

Meta

Source

See Implementation

hunt Nullable classes

Nullable

interfaces

INullable