-use rustc::lint::in_external_macro;
-use rustc_lint::{EarlyContext, EarlyLintPass, LintContext};
+use clippy_utils::diagnostics::span_lint_and_help;
+use rustc_ast::ast::{Expr, ExprKind};
+use rustc_lint::{EarlyContext, EarlyLintPass};
+use rustc_middle::lint::in_external_macro;