Struct Relations

pub struct Relations(pub Vec<Relation>);

A collection of relation entries in a relationship field.

Tuple Fields

0: Vec<Relation>

Implementations

impl Relations

pub fn new() -> Self

Create an empty relations.

pub fn remove(&mut self, index: usize)

Remove an entry from the relations.

pub fn iter(&self) -> impl Iterator<Item = &Relation>

Iterate over the entries in the relations.

pub fn len(&self) -> usize

Number of entries in the relations.

pub fn is_empty(&self) -> bool

Check if the relations are empty.

pub fn satisfied_by(&self, package_version: impl VersionLookup + Copy) -> bool

Check if the relations are satisfied by the given package versions.

Trait Implementations

impl Clone for Relations

fn clone(&self) -> Relations

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Relations

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

Formats the value using the given formatter.

impl Default for Relations

fn default() -> Self

Returns the “default value” for a type.

impl Display for Relations

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

Formats the value using the given formatter.

impl FromIterator<Relation> for Relations

fn from_iter<I: IntoIterator<Item = Relation>>(iter: I) -> Self

Creates a value from an iterator.

impl FromStr for Relations

type Err = String

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for Relations

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 Index<usize> for Relations

type Output = Relation

The returned type after indexing.

fn index(&self, index: usize) -> &Self::Output

Performs the indexing (container[index]) operation.

impl IndexMut<usize> for Relations

fn index_mut(&mut self, index: usize) -> &mut Self::Output

Performs the mutable indexing (container[index]) operation.

impl PartialEq for Relations

fn eq(&self, other: &Relations) -> 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 Relations

impl StructuralPartialEq for Relations