Function get_expr_use_or_unification_node

pub fn get_expr_use_or_unification_node<'tcx>(
    tcx: TyCtxt<'tcx>,
    expr: &Expr<'_>,
) -> Option<(Node<'tcx>, HirId)>

Gets the node where an expression is either used, or it’s type is unified with another branch. Returns both the node and the HirId of the closest child node.