Enum Resolvable 

pub enum Resolvable<T> {
    Resolved(T),
    Unresolved(Box<ResolvableDirective>),
}

A value that is either resolved to a concrete node T or deferred to an extension for resolution.

Variants

Resolved(T)

The value has been resolved to a concrete node.

Unresolved(Box<ResolvableDirective>)

The value needs to be resolved by an extension.

Implementations

impl<T: FromMeta> Resolvable<T>

pub fn from_meta(meta: &Meta) -> Result<Self>

Parse a Meta into a Resolvable<T>. If the path has exactly two segments (i.e. prefix::name), returns Unresolved(ResolvableDirective). Otherwise, delegates to T::from_meta.

impl<T> Resolvable<T>

pub fn resolved(&self) -> Option<&T>

Returns a reference to the resolved value, or None if unresolved.

pub fn try_resolved(&self) -> Result<&T, CodamaError>

Returns the resolved value, or an error if unresolved.

pub fn try_into_resolved(self) -> Result<T, CodamaError>

Consumes self and returns the resolved value, or an error if unresolved.

pub fn is_unresolved(&self) -> bool

Returns true if this is an unresolved directive.

pub fn is_resolved(&self) -> bool

Returns true if this is a resolved value.

pub fn map<U>(self, f: impl FnOnce(T) -> U) -> Resolvable<U>

Maps the resolved value using the given function.

Trait Implementations

impl<T: Clone> Clone for Resolvable<T>

fn clone(&self) -> Resolvable<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for Resolvable<T>

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

Formats the value using the given formatter.

impl<T> From<T> for Resolvable<T>

fn from(value: T) -> Self

Converts to this type from the input type.

impl<T: PartialEq> PartialEq for Resolvable<T>

fn eq(&self, other: &Resolvable<T>) -> 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<T> StructuralPartialEq for Resolvable<T>