Struct Nav 

#[repr(C)]
pub struct Nav {
    pub kind: NavKind,
    pub level: u8,
}

Navigation instruction determining cursor movement and skip policy.

Fields

kind: NavKind

level: u8

Ascent level count for Up* variants, ignored otherwise.

Implementations

impl Nav

pub const fn stay() -> Self

pub const fn next() -> Self

pub const fn next_skip_trivia() -> Self

pub const fn next_exact() -> Self

pub const fn down() -> Self

pub const fn down_skip_trivia() -> Self

pub const fn down_exact() -> Self

pub const fn up(level: u8) -> Self

pub const fn up_skip_trivia(level: u8) -> Self

Constrained ascent requires level == 1. Multi-level ascent with intermediate constraints must decompose into separate transitions.

pub const fn up_exact(level: u8) -> Self

Constrained ascent requires level == 1. Multi-level ascent with intermediate constraints must decompose into separate transitions.

pub const fn is_stay(&self) -> bool

Returns true if this is a Stay navigation (no movement).

pub const fn is_next(&self) -> bool

Returns true if this is a horizontal sibling traversal (Next*).

pub const fn is_down(&self) -> bool

Returns true if this descends into children (Down*).

pub const fn is_up(&self) -> bool

Returns true if this ascends to parent(s) (Up*).

pub const fn is_skip_trivia(&self) -> bool

Returns true if this navigation skips only trivia nodes.

pub const fn is_exact(&self) -> bool

Returns true if this navigation requires exact position (no skipping).

Trait Implementations

impl Clone for Nav

fn clone(&self) -> Nav

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Nav

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

Formats the value using the given formatter.

impl PartialEq for Nav

fn eq(&self, other: &Nav) -> 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 Copy for Nav

impl Eq for Nav

impl StructuralPartialEq for Nav