[orc-rt] Support multiple copies of OpCounter unittest utility. (#161985)

This commit templatizes OpCounter with a size_t argument, allowing
multiple copies of OpCounter to be easily created. This functionality
will be used in upcoming unit tests that need to count operations on
several types at once.

Author: lhames

orc-rt/unittests/CMakeLists.txt

@@ -15,7 +15,6 @@ add_orc_rt_unittest(CoreTests
   AllocActionTest.cpp
   BitmaskEnumTest.cpp
   CallableTraitsHelperTest.cpp
-  CommonTestUtils.cpp
   ErrorTest.cpp
   ExecutorAddressTest.cpp
   IntervalMapTest.cpp

orc-rt/unittests/CommonTestUtils.cpp

@@ -11,7 +11,7 @@
 
 #include <cstddef>
 
-class OpCounter {
+template <size_t Idx = 0> class OpCounter {
 public:
   OpCounter() { ++DefaultConstructions; }
   OpCounter(const OpCounter &Other) { ++CopyConstructions; }
@@ -57,4 +57,11 @@ class OpCounter {
   static size_t Destructions;
 };
 
+template <size_t Idx> size_t OpCounter<Idx>::DefaultConstructions = 0;
+template <size_t Idx> size_t OpCounter<Idx>::CopyConstructions = 0;
+template <size_t Idx> size_t OpCounter<Idx>::CopyAssignments = 0;
+template <size_t Idx> size_t OpCounter<Idx>::MoveConstructions = 0;
+template <size_t Idx> size_t OpCounter<Idx>::MoveAssignments = 0;
+template <size_t Idx> size_t OpCounter<Idx>::Destructions = 0;
+
 #endif // ORC_RT_UNITTEST_COMMONTESTUTILS_H

orc-rt/unittests/CommonTestUtils.h

@@ -47,28 +47,28 @@ TEST(BindTest, LambdaCapture) {
 }
 
 TEST(BindTest, MinimalMoves) {
-  OpCounter::reset();
+  OpCounter<>::reset();
   {
-    auto B = bind_front([](OpCounter &O, int) {}, OpCounter());
+    auto B = bind_front([](OpCounter<> &O, int) {}, OpCounter<>());
     B(0);
   }
-  EXPECT_EQ(OpCounter::defaultConstructions(), 1U);
-  EXPECT_EQ(OpCounter::copies(), 0U);
-  EXPECT_EQ(OpCounter::moves(), 1U);
-  EXPECT_EQ(OpCounter::destructions(), 2U);
+  EXPECT_EQ(OpCounter<>::defaultConstructions(), 1U);
+  EXPECT_EQ(OpCounter<>::copies(), 0U);
+  EXPECT_EQ(OpCounter<>::moves(), 1U);
+  EXPECT_EQ(OpCounter<>::destructions(), 2U);
 }
 
 TEST(BindTest, MinimalCopies) {
-  OpCounter::reset();
+  OpCounter<>::reset();
   {
-    OpCounter O;
-    auto B = bind_front([](OpCounter &O, int) {}, O);
+    OpCounter<> O;
+    auto B = bind_front([](OpCounter<> &O, int) {}, O);
     B(0);
   }
-  EXPECT_EQ(OpCounter::defaultConstructions(), 1U);
-  EXPECT_EQ(OpCounter::copies(), 1U);
-  EXPECT_EQ(OpCounter::moves(), 0U);
-  EXPECT_EQ(OpCounter::destructions(), 2U);
+  EXPECT_EQ(OpCounter<>::defaultConstructions(), 1U);
+  EXPECT_EQ(OpCounter<>::copies(), 1U);
+  EXPECT_EQ(OpCounter<>::moves(), 0U);
+  EXPECT_EQ(OpCounter<>::destructions(), 2U);
 }
 
 TEST(BindTest, ForwardUnboundArgs) {