Result<T, E> class abstract

A monad that represents the result of an operation which may contain a value if successful, or an error otherwise.

Constructors

Result()
Creates a Result.
Result.error(E error)
Creates a Result that represents failure.
factory
Result.value(T value)
Creates a Result that represents success.
factory

Properties

error → E
Returns the error of this Result. A ResultError is throw if this Result does not contain an error.
no setter
failure → bool
Returns true if this Result is not successful.
no setter
hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
successful → bool
Returns true if this Result is successful.
no setter
value → T
Returns the value of this Result. A ResultError is throw if this Result does not contain a value.
no setter

Methods

contains(T value) → bool
Returns true if this Result contains value.
containsError(E error) → bool
Returns true if this Result contains error.
ifFailure(void error(E)) → void
Calls the given function if this Result contains an error.
ifSuccessful(void value(T)) → void
Calls the given function if this Result contains a value.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited
unwrap(T defaultValue) → T
Returns the value of this Result, or defaultValue if Result does not contain a value.
unwrapError(E defaultError) → E
Returns the error of this Result, or defaultError if Result does not contain an error.

Operators

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