AsyncSnapshot<T> class Null safety

Immutable representation of the most recent interaction with an asynchronous computation.

See also:

Annotations

Constructors

AsyncSnapshot.nothing()
Creates an AsyncSnapshot in ConnectionState.none with null data and error.
const
AsyncSnapshot.waiting()
Creates an AsyncSnapshot in ConnectionState.waiting with null data and error.
const
AsyncSnapshot.withData(ConnectionState state, T data)
Creates an AsyncSnapshot in the specified state and with the specified data.
const
AsyncSnapshot.withError(ConnectionState state, Object error, [StackTrace stackTrace = StackTrace.empty])
Creates an AsyncSnapshot in the specified state with the specified error and a stackTrace.
const

Properties

connectionState ConnectionState
Current state of connection to the asynchronous computation.
final
data → T?
The latest data received by the asynchronous computation.
final
error Object?
The latest error object received by the asynchronous computation.
final
hasData bool
Returns whether this snapshot contains a non-null data value.
read-only
hasError bool
Returns whether this snapshot contains a non-null error value.
read-only
hashCode int
The hash code for this object.
read-only, override
requireData → T
Returns latest data received, failing if there is no data.
read-only
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
stackTrace StackTrace?
The latest stack trace object received by the asynchronous computation.
final

Methods

inState(ConnectionState state) AsyncSnapshot<T>
Returns a snapshot like this one, but in the specified state.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed.
inherited
toString() String
A string representation of this object.
override

Operators

operator ==(Object other) bool
The equality operator.
override