Struct Resolver 

pub struct Resolver { /* private fields */ }

An inventory of group sources used to resolve group names to node sets

The FromStr implementation of NodeSet uses the global resolver which can be setup to read group sources from the default configuration file as follows:

use nodeset::{NodeSet, Resolver};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    Resolver::set_global(Resolver::from_config()?).unwrap();

    let ns: NodeSet = "@group".parse()?;

    Ok(())
}

Implementations

impl Resolver

pub fn from_config() -> Result<Self, ConfigurationError>

Create a new resolver from the default configuration files

pub fn set_global(resolver: Resolver) -> Result<(), Resolver>

Set the global resolver to use for parsing NodeSet using the FromStr trait

Returns an error if the global resolver is already set

pub fn get_global() -> &'static Resolver

Get the global resolver

pub fn resolve<T: IdRange + PartialEq + Clone + Display + Debug>( &self, source: Option<&str>, group: &str, ) -> Result<NodeSet<T>, NodeSetParseError>

Resolve a group name to a NodeSet

If source is None, the default group source of the resolver is used.

pub fn list_groups<T: IdRange + PartialEq + Clone + Display + Debug>( &self, source: Option<&str>, ) -> NodeSet<T>

List groups from a source

If source is None, the default group source of the resolver is used.

pub fn list_all_groups<T: IdRange + PartialEq + Clone + Display + Debug>( &self, ) -> impl Iterator<Item = (&str, NodeSet<T>)>

List groups from all sources

Returns a list of tuples with the source name and the group name

pub fn sources(&self) -> impl Iterator<Item = &String>

List all sources

pub fn default_source(&self) -> &str

Returns the default group source for this resolver

Trait Implementations

impl Debug for Resolver

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

Formats the value using the given formatter.

impl Default for Resolver

fn default() -> Self

Returns the “default value” for a type.