Struct ExprBinary
pub struct ExprBinary {
pub attrs: Vec<Attribute>,
pub left: Box<Expr>,
pub op: BinOp,
pub right: Box<Expr>,
}Iterator<Item = &Expr>
node: &ExprBinary
[node.left.as_ref(), node.right.as_ref()]Iterator<Item = &mut Expr>
node: &mut ExprBinary
[node.left.as_mut(), node.right.as_mut()]