Struct Expr 

pub struct Expr {
    pub kind: ExprKind,
    pub line: u32,
    pub column: Option<NonZeroU32>,
}

Fields

kind: ExprKind

line: u32

column: Option<NonZeroU32>

1-indexed column where this expression starts in the source. None on synthetic nodes that don’t correspond to a specific source position. Niche-packed into 4 bytes so the column field costs nothing beyond a plain u32 — runtime error construction reads it out to render a carat under the offending character.

Implementations

impl Expr

pub fn line(kind: ExprKind, line: u32) -> Self

Build an Expr from its kind and a 1-indexed source line, leaving column unset. Convenience constructor for call sites that don’t have a token column handy (synthetic / desugared nodes, for instance).

pub fn at(kind: ExprKind, line: u32, column: Option<NonZeroU32>) -> Self

Build an Expr with a full source position. column is typically NonZeroU32::new(tok.column).

Trait Implementations

impl Clone for Expr

fn clone(&self) -> Expr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Expr

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

Formats the value using the given formatter.