NullArgumentException class
class NullArgumentException extends ArgumentError { final String arg; const NullArgumentException([String arg = '']) : this.arg = arg, super('Null argument: $arg'); String toString() => "Null argument: $arg"; }
Extends
ArgumentError > NullArgumentException
Constructors
const NullArgumentException([String arg = '']) #
const NullArgumentException([String arg = '']) : this.arg = arg, super('Null argument: $arg');
Properties
final String arg #
final String arg;
final Type runtimeType #
A representation of the runtime type of the object.
external Type get runtimeType;
Operators
bool operator ==(other) #
The equality operator.
The default behavior for all Object
s is to return true if and
only if this
and
other are the same object.
If a subclass overrides the equality operator it should override
the hashCode
method as well to maintain consistency.
bool operator ==(other) => identical(this, other);
Methods
const ArgumentError([message = ""]) #
The message describes the erroneous argument.
const ArgumentError([this.message = ""]);
int hashCode() #
Get a hash code for this object.
All objects have hash codes. Hash codes are guaranteed to be the
same for objects that are equal when compared using the equality
operator ==
. Other than that there are no guarantees about
the hash codes. They will not be consistent between runs and
there are no distribution guarantees.
If a subclass overrides hashCode
it should override the
equality operator as well to maintain consistency.
external int hashCode();
noSuchMethod(String name, List args) #
noSuchMethod
is invoked when users invoke a non-existant method
on an object. The name of the method and the arguments of the
invocation are passed to noSuchMethod
. If noSuchMethod
returns a value, that value becomes the result of the original
invocation.
The default behavior of noSuchMethod
is to throw a
noSuchMethodError
.
external Dynamic noSuchMethod(String name, List args);
const NullArgumentException([String arg = '']) #
const NullArgumentException([String arg = '']) : this.arg = arg, super('Null argument: $arg');
const Object() #
Creates a new Object
instance.
Object
instances have no meaningful state, and are only useful
through their identity. An Object
instance is equal to itself
only.
const Object();
String toString() #
Returns a string representation of this object.
String toString() => "Null argument: $arg";