Mojo struct
OptionalReg
@register_passable(trivial)
struct OptionalReg[T: AnyTrivialRegType]
A register-passable optional type.
This struct optionally contains a value. It only works with trivial register passable types at the moment.
Parameters
- T (
AnyTrivialRegType): The type of value stored in the Optional.
Implemented traits
AnyType,
Boolable,
UnknownDestructibility
Methods
__init__
__init__(out self)
Create an optional with a value of None.
__init__(out self, value: T)
Create an optional with a value.
Args:
- value (
T): The value.
__init__(out self, value: NoneType)
Create an optional without a value from a None literal.
Args:
- value (
NoneType): The None value.
__bool__
__bool__(self) -> Bool
Return true if the optional has a value.
Returns:
True if the optional has a value and False otherwise.
__is__
__is__(self, other: NoneType) -> Bool
Return True if the Optional has no value.
It allows you to use the following syntax: if my_optional is None:
Args:
- other (
NoneType): The value to compare to (None).
Returns:
True if the Optional has no value and False otherwise.
__isnot__
__isnot__(self, other: NoneType) -> Bool
Return True if the Optional has a value.
It allows you to use the following syntax: if my_optional is not None:
Args:
- other (
NoneType): The value to compare to (None).
Returns:
True if the Optional has a value and False otherwise.
value
value(self) -> T
Get the optional value.
Returns:
The contained value.
or_else
or_else(self, default: T) -> T
Return the underlying value contained in the Optional or a default value if the Optional's underlying value is not present.
Args:
- default (
T): The new value to use if no value was present.
Returns:
The underlying value contained in the Optional or a default value.
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