impl<'tcx> LateLintPass<'tcx> for ToDigitIsSome {
fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx hir::Expr<'_>) {
if_chain! {
- if let hir::ExprKind::MethodCall(is_some_path, is_some_args, _) = &expr.kind;
+ if let hir::ExprKind::MethodCall(is_some_path, to_digit_expr, [], _) = &expr.kind;
if is_some_path.ident.name.as_str() == "is_some";
- if let [to_digit_expr] = &**is_some_args;
then {
let match_result = match &to_digit_expr.kind {
- hir::ExprKind::MethodCall(to_digits_path, to_digit_args, _) => {
+ hir::ExprKind::MethodCall(to_digits_path, char_arg, [radix_arg], _) => {
if_chain! {
- if let [char_arg, radix_arg] = &**to_digit_args;
if to_digits_path.ident.name.as_str() == "to_digit";
let char_arg_ty = cx.typeck_results().expr_ty_adjusted(char_arg);
if *char_arg_ty.kind() == ty::Char;
then {
- Some((true, char_arg, radix_arg))
+ Some((true, *char_arg, radix_arg))
} else {
None
}
}
hir::ExprKind::Call(to_digits_call, to_digit_args) => {
if_chain! {
- if let [char_arg, radix_arg] = &**to_digit_args;
+ if let [char_arg, radix_arg] = *to_digit_args;
if let hir::ExprKind::Path(to_digits_path) = &to_digits_call.kind;
if let to_digits_call_res = cx.qpath_res(to_digits_path, to_digits_call.hir_id);
if let Some(to_digits_def_id) = to_digits_call_res.opt_def_id();