Struct PathStep 

pub struct PathStep {
    pub direction: Direction,
    pub filter: StepFilter,
    pub min_hops: usize,
    pub max_hops: Option<usize>,
}

A single step in a path pattern.

Each step specifies a direction, edge filter, and optional hop range.

Fields

direction: Direction

Direction to traverse for this step.

filter: StepFilter

Filter for edges in this step.

min_hops: usize

Minimum number of hops (default: 1).

max_hops: Option<usize>

Maximum number of hops (default: 1). Use None for unlimited (variable length patterns).

Implementations

impl PathStep

pub fn new(direction: Direction, filter: impl Into<StepFilter>) -> Self

Create a new single-hop step.

pub fn any(direction: Direction) -> Self

Create a step that matches any edge in the given direction.

pub fn outgoing(edge_type: impl Into<EdgeType>) -> Self

Create an outgoing step with the given edge type.

pub fn incoming(edge_type: impl Into<EdgeType>) -> Self

Create an incoming step with the given edge type.

pub fn both(edge_type: impl Into<EdgeType>) -> Self

Create a bidirectional step with the given edge type.

pub const fn with_hops(self, min: usize, max: Option<usize>) -> Self

Set the hop range for this step.

Arguments

• min - Minimum number of hops
• max - Maximum number of hops (None for unlimited)

pub const fn variable_length(self, min: usize, max: usize) -> Self

Make this a variable-length step with the given range.

Equivalent to Cypher’s *min..max syntax.

pub const fn optional(self) -> Self

Make this step optional (0 or 1 hops).

pub const fn zero_or_more(self) -> Self

Make this step repeat any number of times (0 or more).

pub const fn one_or_more(self) -> Self

Make this step repeat one or more times.

pub fn is_variable_length(&self) -> bool

Check if this step is variable length.

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.