Struct Options

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

A collection of named parameters.

Implementations

impl Options

pub fn get<T: Any + Clone>(&self, name: &str) -> Option<T>

Get the value of a parameter.

pub fn get_ref<T: Any>(&self, name: &str) -> Option<&T>

Get a reference to the value of a parameter.

pub fn get_mut<T: Any>(&mut self, name: &str) -> Option<&mut T>

Get a mutable reference to the value of a parameter.

pub fn set<T: Into<String>, U: Any>( &mut self, name: T, value: U, ) -> &mut Options

Set the value of a parameter.

pub fn has(&self, name: &str) -> bool

Check the presence of a parameter.

pub fn iter(&self) -> Parameters<'_>

Return an iterator over parameters.

pub fn iter_mut(&mut self) -> ParametersMut<'_>

Return an iterator over mutable parameters.

pub fn names(&self) -> Names<'_>

Return an iterator over names.

Trait Implementations

impl Debug for Options

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

Formats the value using the given formatter.

impl Default for Options

fn default() -> Options

Returns the “default value” for a type.

impl<'l> IntoIterator for &'l Options

type Item = (&'l String, &'l Value)

The type of the elements being iterated over.

type IntoIter = Parameters<'l>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Parameters<'l>

Creates an iterator from a value.

impl<'l> IntoIterator for &'l mut Options

type Item = (&'l String, &'l mut Value)

The type of the elements being iterated over.

type IntoIter = ParametersMut<'l>

Which kind of iterator are we turning this into?

fn into_iter(self) -> ParametersMut<'l>

Creates an iterator from a value.