ValueOptional

class dsviper.ValueOptional(type_optional, initial_value)

Bases: object

A class used to represent a value of type optional<element_type>.

Or use Value.create(type_optional [, initial_value]).

static cast(value: Value) → ValueOptional

Return an optional or raise.

clear() → None

Clear the container.

copy() → ValueOptional

Return a deep copy.

description(*, namespace: NameSpace | None = None) → str

Return the description.

get(default: _InputValues | None = None, *, encoded: bool = False) → _OutputValues

Return the wrapped value or return default if given; otherwise raise.

is_nil() → bool

Return True if there is no value to unwrap.

representation() → str

Return the representation.

type() → Type

Return the type.

type_code() → str

Return the type code.

type_optional() → TypeOptional

Return the type optional<element_type>.

unwrap(*, encoded: bool = False) → _OutputValues

Return the wrapped value or raise.

wrap(value: _InputValues) → None

Wrap the value.