Struct OptItem 

pub struct OptItem { /* private fields */ }

A single mount option item, consisting of a name and an optional value.

Examples

let item = OptItem::flag("ro").unwrap();
assert_eq!(item.name(), "ro");
assert!(item.value().is_none());

let item = OptItem::new("size", Some("10G".into())).unwrap();
assert_eq!(item.value(), Some("10G"));

Implementations

impl OptItem

pub fn new( name: impl Into<String>, value: Option<String>, ) -> Result<Self, OptItemError>

Create a new option item with an optional value.

Errors

Returns OptItemError::EmptyName if the name is empty.

pub fn flag(name: impl Into<String>) -> Result<Self, OptItemError>

Create a flag option (no value).

Errors

Returns OptItemError::EmptyName if the name is empty.

pub fn name(&self) -> &str

The option name.

pub fn value(&self) -> Option<&str>

The option value, if present.

pub fn class(&self) -> Option<OptionClass>

The classification of this option (VFS, filesystem, or userspace).

Returns None for unknown options.

pub fn is_known(&self) -> bool

Whether this option is a known option (has a classification).

Trait Implementations

impl Clone for OptItem

fn clone(&self) -> OptItem

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for OptItem

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for OptItem

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for OptItem

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

Formats the value using the given formatter.

impl Hash for OptItem

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 PartialEq for OptItem

fn eq(&self, other: &OptItem) -> 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 Serialize for OptItem

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for OptItem

impl StructuralPartialEq for OptItem