Struct PathStep 

pub struct PathStep {
    pub node: AstNode,
    pub stages: Vec<Stage>,
    pub focus: Option<String>,
    pub index_var: Option<String>,
    pub ancestor_label: Option<String>,
    pub is_tuple: bool,
}

A step in a path expression with optional stages

Stages are operations (like predicates) that apply during the step evaluation, not after all steps are complete.

Fields

node: AstNode

The main step node (field name, wildcard, etc.)

stages: Vec<Stage>

Stages to apply during this step (e.g., predicates)

focus: Option<String>

Set by @$var (focus binding): binds the step’s per-element value to this variable name (without the $ prefix) during tuple-stream evaluation. Mirrors jsonata-js’s step.focus.

index_var: Option<String>

Set by #$var (index binding): binds the step’s per-element index to this variable name (without the $ prefix). Mirrors jsonata-js’s step.index. Replaces the retired AstNode::IndexBind wrapping node.

ancestor_label: Option<String>

Set by ast_transform when a later % reference needs this step’s input value preserved. The label is synthetic (e.g. “!0”, “!1”, …) and used as a tuple-dict key at runtime. Mirrors jsonata-js’s step.ancestor.label.

is_tuple: bool

True when this step must participate in tuple-stream evaluation (because of its own focus/index_var/ancestor_label, or because an earlier step in the same path already entered tuple-stream mode). Mirrors jsonata-js’s step.tuple.

Implementations

impl PathStep

pub fn new(node: AstNode) -> Self

Create a path step from a node without stages

pub fn with_stages(node: AstNode, stages: Vec<Stage>) -> Self

Create a path step with stages

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 Debug for PathStep

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for PathStep

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for PathStep

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for PathStep

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for PathStep