-use rustc_session::declare_tool_lint;
-use syntax::ast::LitKind;
-use syntax::source_map::{ExpnKind, Span};
+use rustc_hir::intravisit::FnKind;
+use rustc_hir::{
+ def, BinOpKind, BindingAnnotation, Body, Expr, ExprKind, FnDecl, HirId, Mutability, PatKind, Stmt, StmtKind, Ty,
+ TyKind, UnOp,
+};
+use rustc_lint::{LateContext, LateLintPass};
+use rustc_session::{declare_lint_pass, declare_tool_lint};
+use rustc_span::source_map::{ExpnKind, Span};