let t_expr = cx.typeck_results().expr_ty(expr);
if t_expr.is_unit();
if let snippet = snippet_with_macro_callsite(cx, expr.span, "}");
let t_expr = cx.typeck_results().expr_ty(expr);
if t_expr.is_unit();
if let snippet = snippet_with_macro_callsite(cx, expr.span, "}");