NullVal class Null safety
A NullVal object represents the Dart language value null.
- Inheritance
- Implemented types
Constructors
Properties
- allocationLocation ↔ InstanceRef?
- The stack trace associated with the allocation of a ReceivePort.
-
associations
↔ List<
MapAssociation> ? - The elements of a Map instance.
- bound ↔ InstanceRef?
- The bound of a TypeParameter or BoundedType.
- bytes ↔ String?
- The bytes of a TypedData instance.
- classRef ↔ ClassRef?
-
Instance references always include their class.
read / writeinherited
- closureContext ↔ ContextRef?
- The context associated with a Closure instance.
- closureFunction ↔ FuncRef?
- The function associated with a Closure instance.
- count ↔ int?
- The number of elements or associations or codeunits returned. This is only provided when it is less than length.
- debugName ↔ String?
- A name associated with a ReceivePort used for debugging purposes.
- elements ↔ List?
- The elements of a List instance.
-
fields
↔ List<
BoundField> ? - The fields of this Instance.
- fixedId ↔ bool?
- Provided and set to true if the id of an Object is fixed. If true, the id of an Object is guaranteed not to change or expire. The object may, however, still be Collected.
- hashCode → int
-
The hash code for this object.
read-onlyoverride
- id ↔ String?
-
A unique identifier for an Object. Passed to the getObject RPC to reload
this Object.
read / writeinherited
- identityHashCode ↔ int?
-
The identityHashCode assigned to the allocated object. This hash code is
the same as the hash code provided in HeapSnapshot and CpuSample's
returned by getAllocationTraces().
read / writeinherited
- isCaseSensitive ↔ bool?
- Whether this regular expression is case sensitive.
- isMultiLine ↔ bool?
- Whether this regular expression matches multiple lines.
-
json
↔ Map<
String, dynamic> ? -
read / writeinherited
- kind ↔ String?
-
What kind of instance is this?
read / writeinherited
- length ↔ int?
- The length of a List or the number of associations in a Map or the number of codeunits in a String.
- mirrorReferent ↔ InstanceRef?
- The referent of a MirrorReference instance.
- name ↔ String?
- The name of a Type instance.
- offset ↔ int?
- The index of the first element or association or codeunit returned. This is only provided when it is non-zero.
- parameterIndex ↔ int?
- The index of a TypeParameter instance.
- parameterizedClass ↔ ClassRef?
- The parameterized class of a type parameter:
-
parameters
↔ List<
Parameter> ? - The list of parameter types for a function.
- pattern ↔ InstanceRef?
- The pattern of a RegExp instance.
- portId ↔ int?
- The port ID for a ReceivePort.
- propertyKey ↔ InstanceRef?
- The key for a WeakProperty instance.
- propertyValue ↔ InstanceRef?
- The key for a WeakProperty instance.
- returnType ↔ InstanceRef?
- The return type of a function.
- runtimeType → Type
-
A representation of the runtime type of the object.
read-onlyinherited
- size ↔ int?
- The size of this object in the heap.
- targetType ↔ InstanceRef?
- The type bounded by a BoundedType instance - or - the referent of a TypeRef instance.
- type → String
-
read-onlyoverride
- typeArguments ↔ TypeArgumentsRef?
- The type arguments for this type.
- typeClass ↔ ClassRef?
- The corresponding Class if this Type is canonical.
-
typeParameters
↔ List<
InstanceRef> ? - The type parameters for a function.
- valueAsString ↔ String?
-
Always 'null'.
read / writeoverride
- valueAsStringIsTruncated ↔ bool?
- The valueAsString for String references may be truncated. If so, this property is added with the value 'true'.
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a non-existent method or property is accessed.
inherited
-
toJson(
) → Map< String, dynamic> -
override
-
toString(
) → String -
A string representation of this object.
override
Operators
-
operator ==(
Object other) → bool -
The equality operator.
override