Enum Segment 

pub enum Segment {
    Key(String),
    Index(usize),
}

A single segment in a MetaPath.

Examples

use zyn::path::Segment;

let key: Segment = "serde".into();
let index: Segment = 0usize.into();

assert!(key.is_key());
assert!(index.is_index());
assert_eq!(key.to_string(), "serde");
assert_eq!(index.to_string(), "0");

Variants

Key(String)

A named key segment (e.g., serde in "serde.rename").

Index(usize)

A positional index segment (e.g., 0 in "derive[0]").

Implementations

impl Segment

pub fn is_key(&self) -> bool

Returns true if this is a key segment.

pub fn is_index(&self) -> bool

Returns true if this is an index segment.

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

Returns the key string if this is a key segment.

pub fn as_index(&self) -> Option<usize>

Returns the index value if this is an index segment.

Trait Implementations

impl Clone for Segment

fn clone(&self) -> Segment

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Segment

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

Formats the value using the given formatter.

impl Display for Segment

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

Formats the value using the given formatter.

impl From<&str> for Segment

fn from(key: &str) -> Self

Converts to this type from the input type.

impl From<String> for Segment

fn from(key: String) -> Self

Converts to this type from the input type.

impl From<usize> for Segment

fn from(index: usize) -> Self

Converts to this type from the input type.

impl PartialEq for Segment

fn eq(&self, other: &Segment) -> 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 Eq for Segment

impl StructuralPartialEq for Segment