Enum PathStep 

#[non_exhaustive]
pub enum PathStep {
    Field(u32),
    Index(u32),
    Variant(u32),
    MapKey(u32),
    MapValue(u32),
    OptionSome,
    Deref,
    Inner,
    Proxy,
}

A single step in a path through a type structure.

Each step records an index that can be used to navigate back through a Shape to reconstruct field names and types.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Field(u32)

Navigate to a struct field by index

Index(u32)

Navigate to a list/array element by index

Variant(u32)

Navigate to an enum variant by index

MapKey(u32)

Navigate into a map key at a specific entry index. The entry index distinguishes paths for different map keys’ inner frames.

MapValue(u32)

Navigate into a map value at a specific entry index. The entry index distinguishes paths for different map values’ inner frames.

OptionSome

Navigate into Some of an Option

Deref

Navigate through a pointer/reference

Inner

Navigate into a transparent inner type (e.g., NonZero<T> -> T)

Proxy

Navigate into a proxy type (e.g., Inner with #[facet(proxy = InnerProxy)])

This step distinguishes a proxy frame from its parent in the deferred processing path, so both can be stored without path collisions.

Trait Implementations

impl Clone for PathStep

fn clone(&self) -> PathStep

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for PathStep

impl Debug for PathStep

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

Formats the value using the given formatter.

impl Eq for PathStep

impl Hash for PathStep

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 PathStep

fn cmp(&self, other: &PathStep) -> 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.

impl PartialEq for PathStep

fn eq(&self, other: &PathStep) -> 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 PartialOrd for PathStep

fn partial_cmp(&self, other: &PathStep) -> 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 PathStep