Kind<T> class abstract

Describes how to construct an instance of some type T.

Fixed-width types

Variable-width types

Nullable types and collections

Custom objects

Implementers
Annotations
  • @immutable

Constructors

Kind.constructor({required String? name, String? jsonName, List<Trait>? traits, List<T>? examples})
Constructor for subclasses.
const

Properties

dartType → Type
Type T.
no setter
defaultValueMirror → InstanceMirror
InstanceMirror for the default value.
no setter
equality → Equality
Equality for the kind;
no setter
examples → Iterable<T>
Examples of instances that are valid (isValidDynamic).
no setter
examplesThatAreInvalid → Iterable<T>
Examples of instances that are NOT valid (isValidDynamic).
no setter
examplesWithoutValidation → Iterable<T>
Interesting examples of instances (may be valid or invalid).
no setter
hashCode → int
The hash code for this object.
no setteroverride
isNullable → bool
Whether this kind is nullable.
no setter
isPrimitive → bool
Whether instances of the kind can't have references to other instances.
no setter
jsonName → String?
JSON identifier of the class.
final
name → String
Dart identifier of the class.
no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
traits → List<Trait>
Traits of the kind.
final

Methods

asType(Object? value) → T
Casts value to T.
checkDeclaration() → void
Checks that the declaration makes sense.
checkInstance(Object? value) → void
checkValid(T instance) → void
checkValidDynamic(Object? instance) → void
Throws ArgumentError error if instance is not valid (isValidDynamic).
clone(T instance) → T
Clones the instance.
compare(T left, T right) → int
Compares two values.
debugString(T instance) → String
Constructs a string for debugging instance.
decodeJsonTree(Object? json) → T
Converts json (any JSON tree) to an instance of T.
decodeString(String string) → T
Decodes string to an instance of T.
encodeJsonTree(T instance) → Object?
Converts instance to a JSON tree.
encodeString(T instance) → String
Converts instance to a string.
isDefaultValue(Object? instance) → bool
Determines whether the argument is a default value of this kind.
isInstance(Object? instance) → bool
Determines whether the argument is an instance of T.
isInstanceOfList(Object? instance) → bool
Determines whether the argument is an instance of List<T>.
isInstanceOfSet(Object? instance) → bool
Determines whether the argument is an instance of Set<T>.
isNullableSubKind(Kind other, {bool andNotEqual = true}) → bool
Tells whether the argument is instance of Kind<T> and dartType values are different.
isSubKind(Kind other, {bool andNotEqual = true}) → bool
Tells whether the argument is instance of Kind<T> and dartType values are different.
isValid(T instance) → bool
Tells whether the instance is valid.
isValidDynamic(Object? instance) → bool
Tells whether the instance is valid.
memorySize(T instance) → int
Estimates memory usage of instance.
memorySizeWith(MemoryCounter counter, T instance) → void
Estimates memory usage with an instance of MemoryCounter.
newInstance() → T
Constructs a new instance of the default value.
newList(int length, {bool growable = true}) → List<T>
Constructs a new list.
newListFrom(Iterable<T> iterable, {bool growable = true}) → List<T>
Constructs a new list from iterable.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
permute(T instance) → T
Generates another instance with some deterministic function.
register() → void
Registers this kind so that it will be visible in Kind.all.
toList() → Kind<List<T>>
Constructs Kind for List<T>.
toNonNullable() → Kind<T>
Returns a non-nullable kind.
toNullable() → Kind<T?>
Constructs Kind for T?.
toPolymorphic() → PolymorphicKind<T>
Constructs a PolymorphicKind for this kind.
toSet() → Kind<Set<T>>
Constructs Kind for Set<T>.
toString() → String
A string representation of this object.
inherited

Operators

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

Static Properties

all → Set<Kind>
All registered kinds.
final

Static Methods

find<T>({T? instance}) → Kind<T>
Finds a registered kind for T.
maybeFindByInstance<T>(T instance) → Kind<T>?
Finds a registered kind for instance.
maybeFindByType<T>() → Kind<T>?
Finds a registered kind for T.
newInvalidValueError({required Kind kind, required Object? instance}) → Error
Used by checkValidDynamic.
registerAll(Iterable<Kind> kinds) → void
Registers all kinds.

Constants

defaultPrimitiveKinds → const List<Kind>
Default primitive kinds.
forBigInt → const Kind<BigInt>
Kind for BigInt.
forBool → const Kind<bool>
Kind for bool.
forDateTime → const Kind<DateTime>
Kind for DateTime.
forDouble → const Kind<double>
Kind for double.
forDuration → const Kind<Duration>
Kind for Duration.
forInt → const Kind<int>
Kind for int.
forKindInDebugMode → const PolymorphicKind<Kind>
Kind for Kind.
forNull → const Kind<Null>
Kind for Null (null).
forString → const Kind<String>
Kind for String.
forUint8List → const Kind<Uint8List>
Kind for Uint8List.