Struct Options 

pub struct Options { /* private fields */ }

Ordered map of loader options.

Implementations

impl Options

pub fn new() -> Self

Build an empty Options map.

pub fn len(&self) -> usize

Number of entries.

pub fn is_empty(&self) -> bool

true if there are no entries.

pub fn contains_key(&self, key: &str) -> bool

true if key is present.

pub fn get(&self, key: &str) -> Option<&OptionValue>

The value for key, or None if absent.

pub fn get_mut(&mut self, key: &str) -> Option<&mut OptionValue>

A mutable reference to the value for key, or None if absent.

pub fn insert<K: Into<String>, V: Into<OptionValue>>( &mut self, key: K, value: V, ) -> Option<OptionValue>

Insert key = value, returning the previous value if key was already present.

A duplicate key replaces the earlier entry, matching the “last wins” rule for parsed source strings.

pub fn remove(&mut self, key: &str) -> Option<OptionValue>

Remove and return the value for key, or None if absent.

pub fn iter(&self) -> impl Iterator<Item = (&str, &OptionValue)>

Iterate over (key, value) pairs in insertion order.

pub fn keys(&self) -> impl Iterator<Item = &str>

Iterate over keys in insertion order.

pub fn values(&self) -> impl Iterator<Item = &OptionValue>

Iterate over values in insertion order.

Trait Implementations

impl Clone for Options

fn clone(&self) -> Options

Returns a duplicate of the value.

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

Performs copy-assignment from source.

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 Display for Options

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

Formats the value using the given formatter.

impl From<Options> for OptionValue

fn from(value: Options) -> Self

Converts to this type from the input type.

impl PartialEq for Options

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Options