Closure class

A Closure takes a Function argument that returns a Status. The function is executed by a call to the update() method of the Closure.

The main use case of the Closure type is to avoid having to explicitly write/subclass a Node type and/or to capture the surrounding scope at declaration.

Example:

void closureExample() {
  var x = 0;

  final closure = Closure(() {
    // capture x from local scope and compute a Status
    return ++x % 2 == 0 ? Status.success : Status.failure;
  });

  assert(closure.update() == Status.failure);
  assert(closure.update() == Status.success);
  assert(closure.update() == Status.failure);
}

Inheritance

• Object
• Node
• Closure

Constructors

Closure(Status _closure())

Construct a Closure with the specified Function argument.

const

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

reset() → void

inherited

toString() → String

A string representation of this object.

inherited

update() → Status

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited