Struct DataPath 

pub struct DataPath { /* private fields */ }

A path into the data a rule is evaluated against, one segment per object key or array index, from the root.

A read of a path observes the whole value there, everything under it included. The empty path is the whole data context.

Segments are kept apart rather than joined, because var splits its path on dots and val does not: {"var": "a.b"} reads ["a", "b"] while {"val": "a.b"} reads the single key ["a.b"]. The Display form joins them with dots, so it is only unambiguous for segments that contain none.

Implementations

impl DataPath

pub fn segments(&self) -> &[String]

The path’s segments, root first. Numeric segments are kept as written ("0"): they index an array, or name a key on an object.

pub fn is_root(&self) -> bool

Whether this is the empty path, the whole data context.

pub fn covers(&self, other: &DataPath) -> bool

Whether this path is other or an ancestor of it, so that a read of this path observes other too.

Trait Implementations

impl Clone for DataPath

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DataPath

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

Formats the value using the given formatter.

impl Display for DataPath

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

Formats the value using the given formatter.

impl Eq for DataPath

impl Hash for DataPath

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 Ord for DataPath

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for DataPath

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for DataPath

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for DataPath