Struct Relation

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

A node in the syntax tree representing a $ast

Implementations

impl Relation

pub fn new( name: &str, version_constraint: Option<(VersionConstraint, Version)>, ) -> Self

Create a new relation

Arguments

• name - The name of the package
• version_constraint - The version constraint and version to use

Example

use debian_control::lossless::relations::{Relation};
use debian_control::relations::VersionConstraint;
let relation = Relation::new("samba", Some((VersionConstraint::GreaterThanEqual, "2.0".parse().unwrap())));
assert_eq!(relation.to_string(), "samba (>= 2.0)");

pub fn wrap_and_sort(&self) -> Self

Wrap and sort this relation

Example

use debian_control::lossless::relations::Relation;
let relation = "  samba  (  >= 2.0) ".parse::<Relation>().unwrap();
assert_eq!(relation.wrap_and_sort().to_string(), "samba (>= 2.0)");

pub fn simple(name: &str) -> Self

Create a new simple relation, without any version constraints.

Example

use debian_control::lossless::relations::Relation;
let relation = Relation::simple("samba");
assert_eq!(relation.to_string(), "samba");

pub fn drop_constraint(&mut self) -> bool

Remove the version constraint from the relation.

Example

use debian_control::lossless::relations::{Relation};
use debian_control::relations::VersionConstraint;
let mut relation = Relation::new("samba", Some((VersionConstraint::GreaterThanEqual, "2.0".parse().unwrap())));
relation.drop_constraint();
assert_eq!(relation.to_string(), "samba");

pub fn name(&self) -> String

Return the name of the package in the relation.

Example

use debian_control::lossless::relations::Relation;
let relation = Relation::simple("samba");
assert_eq!(relation.name(), "samba");

pub fn archqual(&self) -> Option<String>

Return the archqual

Example

use debian_control::lossless::relations::Relation;
let relation: Relation = "samba:any".parse().unwrap();
assert_eq!(relation.archqual(), Some("any".to_string()));

pub fn set_archqual(&mut self, archqual: &str)

Set the architecture qualifier for this relation.

Example

use debian_control::lossless::relations::Relation;
let mut relation = Relation::simple("samba");
relation.set_archqual("any");
assert_eq!(relation.to_string(), "samba:any");

pub fn version(&self) -> Option<(VersionConstraint, Version)>

Return the version constraint and the version it is constrained to.

pub fn set_version( &mut self, version_constraint: Option<(VersionConstraint, Version)>, )

Set the version constraint for this relation

Example

use debian_control::lossless::relations::{Relation};
use debian_control::relations::VersionConstraint;
let mut relation = Relation::simple("samba");
relation.set_version(Some((VersionConstraint::GreaterThanEqual, "2.0".parse().unwrap())));
assert_eq!(relation.to_string(), "samba (>= 2.0)");

pub fn architectures(&self) -> Option<impl Iterator<Item = String> + '_>

Return an iterator over the architectures for this relation

Example

use debian_control::lossless::relations::Relation;
let relation: Relation = "samba [amd64]".parse().unwrap();
assert_eq!(relation.architectures().unwrap().collect::<Vec<_>>(), vec!["amd64".to_string()]);

pub fn profiles(&self) -> impl Iterator<Item = Vec<BuildProfile>> + '_

Returns an iterator over the build profiles for this relation

Example

use debian_control::lossless::relations::{Relation};
use debian_control::relations::{BuildProfile};
let relation: Relation = "samba <!nocheck>".parse().unwrap();
assert_eq!(relation.profiles().collect::<Vec<_>>(), vec![vec![BuildProfile::Disabled("nocheck".to_string())]]);

pub fn remove(&mut self)

Remove this relation

Example

use debian_control::lossless::relations::{Relation,Entry};
let mut entry: Entry = r"python3-dulwich (>= 0.19.0) | python3-urllib3 (<< 1.26.0)".parse().unwrap();
let mut relation = entry.get_relation(0).unwrap();
relation.remove();
assert_eq!(entry.to_string(), "python3-urllib3 (<< 1.26.0)");

pub fn set_architectures<'a>( &mut self, architectures: impl Iterator<Item = &'a str>, )

Set the architectures for this relation

Example

use debian_control::lossless::relations::Relation;
let mut relation = Relation::simple("samba");
relation.set_architectures(vec!["amd64", "i386"].into_iter());
assert_eq!(relation.to_string(), "samba [amd64 i386]");

pub fn add_profile(&mut self, profile: &[BuildProfile])

Add a build profile to this relation

Example

use debian_control::lossless::relations::Relation;
use debian_control::relations::BuildProfile;
let mut relation = Relation::simple("samba");
relation.add_profile(&[BuildProfile::Disabled("nocheck".to_string())]);
assert_eq!(relation.to_string(), "samba <!nocheck>");

pub fn build(name: &str) -> RelationBuilder

Build a new relation

Trait Implementations

impl Debug for Relation

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

Formats the value using the given formatter.

impl Display for Relation

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

Formats the value using the given formatter.

impl From<Relation> for Entry

fn from(relation: Relation) -> Self

Converts to this type from the input type.

impl From<Relation> for Relation

fn from(relation: Relation) -> Self

Converts to this type from the input type.

impl From<Relation> for Relation

fn from(relation: Relation) -> Self

Converts to this type from the input type.

impl FromStr for Relation

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 Ord for Relation

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Relation

fn eq(&self, other: &Self) -> 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 PartialOrd for Relation

fn partial_cmp(&self, other: &Self) -> 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 Eq for Relation