src/tools/clippy/clippy_lints/src/types/linked_list.rs

   1 use clippy_utils::diagnostics::span_lint_and_help;
   2 use rustc_hir::{self as hir, def_id::DefId};
   3 use rustc_lint::LateContext;
   4 use rustc_span::symbol::sym;
   5
   6 use super::LINKEDLIST;
   7
   8 pub(super) fn check(cx: &LateContext<'_>, hir_ty: &hir::Ty<'_>, def_id: DefId) -> bool {
   9     if cx.tcx.is_diagnostic_item(sym::LinkedList, def_id) {
  10         span_lint_and_help(
  11             cx,
  12             LINKEDLIST,
  13             hir_ty.span,
  14             "you seem to be using a `LinkedList`! Perhaps you meant some other data structure?",
  15             None,
  16             "a `VecDeque` might work",
  17         );
  18         true
  19     } else {
  20         false
  21     }
  22 }