ValueStream<T> class abstract

Abstract base class for a broadcast Stream with access to the latest emitted value.

Implemented types

Constructors

first → Future<T>: The first element of this stream. Returns last emitted value if available, or waits for the first element to come. May throw, if first value is an error.
no setter
hashCode → int: The hash code for this object.
no setterinherited
innerStream → Stream<T>: Internal stream.
no setter
isClosed → bool: Whether the stream is closed for adding more events.
no setter
next → Future<T>: Waits for the next element emitted by this stream, and returns it. If the stream emits an error, it will be propagated to the returned future. If the stream is closed before any data is emitted, it will throw a StateError.
no setter
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
valueOrNull → T?: Latest emitted value, or null if no value is available.
no setter

add(T data, {bool skipIfClosed = false, bool skipSame = false, bool skipNull = false}) → bool: Push data to the stream. Ignored if skipIfClosed is true and the stream is closed. Ignored if skipSame is true and data == value. Ignored if skipNull is true and data is null. Return true if value was added.
override
close() → Future<void>: Close the stream. After that, calls to add are no longer allowed.
override
listen(void onData(T data)?, {void onDone()?}) → StreamSubscription<T>: Adds a subscription to this stream.
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
toString() → String: A string representation of this object.
inherited