unittests/ADT/IListSentinelTest.cpp

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