Struct preserves::value::repr::Annotations

pub struct Annotations<N: NestedValue>(/* private fields */);

Representation of a collection of annotations to be attached to a Value by way of an implementation of trait NestedValue.

Implementations

impl<N: NestedValue> Annotations<N>

pub fn empty() -> Self

Yield the empty Annotations sequence.

pub fn new(anns: Option<Vec<N>>) -> Self

Yield Annotations from a vector of values.

pub fn maybe_slice(&self) -> Option<&[N]>

Extract carried annotations, if there are any.

pub fn slice(&self) -> &[N]

Extract carried annotations, supplying an empty slice if there are none.

pub fn to_vec(self) -> Vec<N>

Produce a fresh Vec of the carried annotations.

pub fn modify<F>(&mut self, f: F) -> &mut Self

where F: FnOnce(&mut Vec<N>),

Allows in-place updating of the collection of carried annotations.

pub fn copy_via<M: NestedValue, F, Err>( &self, f: &mut F, ) -> Result<Annotations<M>, Err>

where F: FnMut(&N::Embedded) -> Result<Value<M>, Err>,

Yields a deep copy of self, mapping embedded values to a new type via f.

Trait Implementations

impl<N: Clone + NestedValue> Clone for Annotations<N>

fn clone(&self) -> Annotations<N>

Returns a copy of the value.

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

Performs copy-assignment from source.