Struct arithmetic_eval::OpaqueRef

pub struct OpaqueRef { /* private fields */ }

Opaque reference to a native value.

The references cannot be created by interpreted code, but can be used as function args or return values of native functions. References are Arc’d, thus can easily be cloned.

References are comparable among each other:

• If the wrapped value implements PartialEq, this implementation will be used for comparison.
• If PartialEq is not implemented, the comparison is by the Arc pointer.

Implementations

impl OpaqueRef

pub fn new<T>(value: T) -> Self

where T: Any + Debug + PartialEq,

Creates a reference to value that implements equality comparison.

Prefer using this method if the wrapped type implements PartialEq.

pub fn with_identity_eq<T: Any>(value: T) -> Self

Creates a reference to value with the identity comparison: values are considered equal iff they point to the same data.

Prefer Self::new() when possible.

pub fn downcast_ref<T: Any>(&self) -> Option<&T>

Tries to downcast this reference to a specific type.

Trait Implementations

impl Clone for OpaqueRef

fn clone(&self) -> OpaqueRef

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for OpaqueRef

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

Formats the value using the given formatter.

impl Display for OpaqueRef

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

Formats the value using the given formatter.

impl PartialEq for OpaqueRef

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

This method tests for self and other values to be equal, and is used by ==.

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

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