use crate::utils::span_lint;
-use rustc::lint::{EarlyContext, EarlyLintPass};
+use rustc_ast::ast::{Expr, ExprKind};
+use rustc_lint::{EarlyContext, EarlyLintPass};
use rustc_session::{declare_lint_pass, declare_tool_lint};
-use syntax::ast::*;
declare_clippy_lint! {
/// **What it does:** Checks for unnecessary double parentheses.