Struct OptionalType 

pub struct OptionalType {
    pub parameter: Box<ValueType>,
}

Optional type representing values that may or may not be present.

Optional types wrap another type to indicate that values of that type may be absent. This is similar to Rust’s Option<T> type.

Examples

use cel_cxx::*;

// Optional string: optional<string>
let optional_string = OptionalType::new(ValueType::String);

// Optional list: optional<list<int>>
let optional_list = OptionalType::new(
    ValueType::List(ListType::new(ValueType::Int))
);

Fields

parameter: Box<ValueType>

The type that may or may not be present.

Implementations

impl OptionalType

pub fn new(parameter: ValueType) -> Self

Creates a new optional type wrapping the given type.

Arguments

• parameter - The type that may be optional

Examples

use cel_cxx::*;

let optional_int = OptionalType::new(ValueType::Int);
assert_eq!(optional_int.parameter(), &ValueType::Int);

pub fn parameter(&self) -> &ValueType

Returns the wrapped type.

Examples

use cel_cxx::*;

let optional_string = OptionalType::new(ValueType::String);
assert_eq!(optional_string.parameter(), &ValueType::String);

Trait Implementations

impl Clone for OptionalType

fn clone(&self) -> OptionalType

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for OptionalType

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for OptionalType

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<OptionalType> for ValueType

fn from(value: OptionalType) -> Self

Converts to this type from the input type.

impl Hash for OptionalType

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for OptionalType

fn eq(&self, other: &OptionalType) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for OptionalType

impl StructuralPartialEq for OptionalType