Result<T, E> class sealed

A functional type representing either a Success or a Failure.

Use Result to handle errors without try-catch blocks.

Example:

Result<int, String> divide(int a, int b) {
  if (b == 0) return Result.error('Cannot divide by zero');
  return Result.ok(a ~/ b);
}
Implementers

Constructors

Result.error(E error)
Creates a failed result.
factory
Result.ok(T value)
Creates a successful result.
factory

Properties

hashCode → int
The hash code for this object.
no setterinherited
isFailure → bool
Returns true if this constitutes a failure.
no setter
isSuccess → bool
Returns true if this constitutes a success.
no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
unwrap → T
Returns the value if successful, otherwise throws the error.
no setter

Methods

map<U>(U f(T value)) → Result<U, E>
Maps the value if successful, otherwise returns the error as is.
match<R>(R onSuccess(T value), R onError(E error)) → R
Executed providing the value if successful, or the error if failed.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited