Union4<X1, X2, X3, X4>
extension type
Emulate the union of the types X1 .. X4.
- on
Constructors
- Union4(Object? value)
- Union4.in1(X1 value)
- Create a Union4 value from the first type argument.
- Union4.in2(X2 value)
- Create a Union4 value from the second type argument.
- Union4.in3(X3 value)
- Create a Union4 value from the third type argument.
- Union4.in4(X4 value)
- Create a Union4 value from the fourth type argument.
Properties
- as1 → X1
-
Return the value if it has type
X1, otherwise throw.no setter - as1OrNull → X1?
-
Return the value if it has type
X1, otherwise null.no setter - as2 → X2
-
Return the value if it has type
X2, otherwise throw.no setter - as2OrNull → X2?
-
Return the value if it has type
X2, otherwise null.no setter - as3 → X3
-
Return the value if it has type
X3, otherwise throw.no setter - as3OrNull → X3?
-
Return the value if it has type
X3, otherwise null.no setter - as4 → X4
-
Return the value if it has type
X4, otherwise throw.no setter - as4OrNull → X4?
-
Return the value if it has type
X4, otherwise null.no setter - is1 → bool
-
Return type iff the value has type
X1.no setter - is2 → bool
-
Return type iff the value has type
X2.no setter - is3 → bool
-
Return type iff the value has type
X3.no setter - is4 → bool
-
Return type iff the value has type
X4.no setter - isValid → bool
-
Return true iff this Union4 has a type in
X1..X4.no setter - value → Object?
-
final
Methods
-
split<
R> (R on1(X1), R on2(X2), R on3(X3), R on4(X4)) → R -
splitNamed<
R> ({R on1(X1)?, R on2(X2)?, R on3(X3)?, R on4(X4)?, R onOther(Object?)?, R onInvalid(Object?)?}) → R?