llvm/unittests/ADT/IListSentinelTest.cpp

   1 //===- unittests/ADT/IListSentinelTest.cpp - ilist_sentinel unit tests ----===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/ADT/ilist_node.h"
  10 #include "gtest/gtest.h"
  11
  12 using namespace llvm;
  13
  14 namespace {
  15
  16 template <class T, class... Options> struct PickSentinel {
  17   typedef ilist_sentinel<
  18       typename ilist_detail::compute_node_options<T, Options...>::type>
  19       type;
  20 };
  21
  22 class Node : public ilist_node<Node> {};
  23 class TrackingNode : public ilist_node<Node, ilist_sentinel_tracking<true>> {};
  24 typedef PickSentinel<Node>::type Sentinel;
  25 typedef PickSentinel<Node, ilist_sentinel_tracking<true>>::type
  26     TrackingSentinel;
  27 typedef PickSentinel<Node, ilist_sentinel_tracking<false>>::type
  28     NoTrackingSentinel;
  29
  30 struct LocalAccess : ilist_detail::NodeAccess {
  31   using NodeAccess::getPrev;
  32   using NodeAccess::getNext;
  33 };
  34
  35 TEST(IListSentinelTest, DefaultConstructor) {
  36   Sentinel S;
  37   EXPECT_EQ(&S, LocalAccess::getPrev(S));
  38   EXPECT_EQ(&S, LocalAccess::getNext(S));
  39 #if LLVM_ENABLE_ABI_BREAKING_CHECKS
  40   EXPECT_TRUE(S.isKnownSentinel());
  41 #else
  42   EXPECT_FALSE(S.isKnownSentinel());
  43 #endif
  44
  45   TrackingSentinel TS;
  46   NoTrackingSentinel NTS;
  47   EXPECT_TRUE(TS.isSentinel());
  48   EXPECT_TRUE(TS.isKnownSentinel());
  49   EXPECT_FALSE(NTS.isKnownSentinel());
  50 }
  51
  52 TEST(IListSentinelTest, NormalNodeIsNotKnownSentinel) {
  53   Node N;
  54   EXPECT_EQ(nullptr, LocalAccess::getPrev(N));
  55   EXPECT_EQ(nullptr, LocalAccess::getNext(N));
  56   EXPECT_FALSE(N.isKnownSentinel());
  57
  58   TrackingNode TN;
  59   EXPECT_FALSE(TN.isSentinel());
  60 }
  61
  62 } // end namespace