Struct Parts 

pub struct Parts(/* private fields */);

Represents a collection of parts in the ERN (Entity Resource Name), handling multiple segments.

Implementations

impl Parts

pub fn new(f0: Vec<Part>) -> Self

Constructs a new Parts.

impl Parts

pub fn add_part<T>(self, part: T) -> Result<Self, ErnError>

where T: Into<Part>,

Adds a part to the collection, bounded by DEFAULT_MAX_PARTS.

Arguments

• part - The Part to be added to the collection.

Returns

• Result<Parts, ErnError> - The updated Parts collection, or an error if the collection already holds DEFAULT_MAX_PARTS parts.

pub fn add_part_with_limit<T>( self, part: T, max_parts: usize, ) -> Result<Self, ErnError>

where T: Into<Part>,

Adds a part to the collection, bounded by a caller-chosen maximum.

Use this when DEFAULT_MAX_PARTS is the wrong bound for your domain - deep supervision hierarchies being the motivating case.

Arguments

• part - The Part to be added to the collection.
• max_parts - The maximum number of parts this collection may hold.

Returns

• Result<Parts, ErnError> - The updated Parts collection, or an error if the collection already holds max_parts parts.

Example

let mut parts = Parts::default();
for i in 0..32 {
    parts = parts.add_part_with_limit(Part::new(format!("level{i}"))?, 64)?;
}
assert_eq!(parts.len(), 32);

pub fn into_owned(self) -> Parts

Converts the Parts into an owned version with ’static lifetime

pub fn len(&self) -> usize

Returns the number of parts in the collection.

pub fn is_empty(&self) -> bool

Returns true if the collection is empty.

Trait Implementations

impl Clone for Parts

fn clone(&self) -> Parts

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Parts

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

Formats the value using the given formatter.

impl Default for Parts

fn default() -> Parts

Returns the “default value” for a type.

impl Display for Parts

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

Formats the collection of parts as a string, joining them with ‘/’.

impl Eq for Parts

impl ErnComponent for Parts

Implementation for the Parts component of an ERN.

The Parts component represents a collection of path parts in the ERN. Its NextState is itself, allowing for multiple parts to be added.

type NextState = Parts

The type of the next component that should follow this one in the ERN structure.

fn prefix() -> &'static str

Returns the prefix string that should appear before this component in an ERN.

fn build_root(_value: &str) -> Option<Result<EntityRoot, ErnError>>

Builds the ERN root component this type contributes, if it can occupy the root slot.

impl FromIterator<Part> for Parts

fn from_iter<T: IntoIterator<Item = Part>>(iter: T) -> Self

Creates a value from an iterator.

impl Hash for Parts

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 IntoIterator for Parts

type Item = Part

The type of the elements being iterated over.

type IntoIter = IntoIter<<Parts as IntoIterator>::Item>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl<'a> IntoIterator for &'a Parts

type Item = &'a Part

The type of the elements being iterated over.

type IntoIter = Iter<'a, Part>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl PartialEq for Parts

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for Parts

fn partial_cmp(&self, other: &Parts) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for Parts