pub fn expr_path<'a>(expr: &'a Expr, path: &[Symbol]) -> Option<&'a Expr>Expand description
Resolves a dotted path of symbol keys through nested map expressions.
Walks expr one segment at a time, descending into
Expr::Map entries keyed by each symbol. Returns the
addressed sub-expression, or None if any segment is missing or the cursor
is not a map.