Allow Optionals to be compared to None

[oota-llvm.git] / unittests / ADT / OptionalTest.cpp

diff --git a/unittests/ADT/OptionalTest.cpp b/unittests/ADT/OptionalTest.cpp
index 51c54523b88d89356bc92e31ea4048956cd53b6e..18b59e315818eaa84eb35464e702b131c9099c1d 100644 (file)
--- a/unittests/ADT/OptionalTest.cpp
+++ b/unittests/ADT/OptionalTest.cpp
@@ -177,6 +177,44 @@ TEST_F(OptionalTest, GetValueOr) {
   EXPECT_EQ(5, A.getValueOr(42));
 }
 
+struct MultiArgConstructor {
+  int x, y;
+  MultiArgConstructor(int x, int y) : x(x), y(y) {}
+  explicit MultiArgConstructor(int x, bool positive)
+    : x(x), y(positive ? x : -x) {}
+
+  MultiArgConstructor(const MultiArgConstructor &) = delete;
+  MultiArgConstructor(MultiArgConstructor &&) = delete;
+  MultiArgConstructor &operator=(const MultiArgConstructor &) = delete;
+  MultiArgConstructor &operator=(MultiArgConstructor &&) = delete;
+
+  static unsigned Destructions;
+  ~MultiArgConstructor() {
+    ++Destructions;
+  }
+  static void ResetCounts() {
+    Destructions = 0;
+  }
+};
+unsigned MultiArgConstructor::Destructions = 0;
+
+TEST_F(OptionalTest, Emplace) {
+  MultiArgConstructor::ResetCounts();
+  Optional<MultiArgConstructor> A;
+  
+  A.emplace(1, 2);
+  EXPECT_TRUE(A.hasValue());
+  EXPECT_EQ(1, A->x);
+  EXPECT_EQ(2, A->y);
+  EXPECT_EQ(0u, MultiArgConstructor::Destructions);
+
+  A.emplace(5, false);
+  EXPECT_TRUE(A.hasValue());
+  EXPECT_EQ(5, A->x);
+  EXPECT_EQ(-5, A->y);
+  EXPECT_EQ(1u, MultiArgConstructor::Destructions);
+}
+
 struct MoveOnly {
   static unsigned MoveConstructions;
   static unsigned Destructions;
@@ -286,6 +324,38 @@ TEST_F(OptionalTest, MoveOnlyAssigningAssignment) {
   EXPECT_EQ(1u, MoveOnly::Destructions);
 }
 
+struct Immovable {
+  static unsigned Constructions;
+  static unsigned Destructions;
+  int val;
+  explicit Immovable(int val) : val(val) {
+    ++Constructions;
+  }
+  ~Immovable() {
+    ++Destructions;
+  }
+  static void ResetCounts() {
+    Constructions = 0;
+    Destructions = 0;
+  }
+private:
+  // This should disable all move/copy operations.
+  Immovable(Immovable&& other) = delete;
+};
+
+unsigned Immovable::Constructions = 0;
+unsigned Immovable::Destructions = 0;
+
+TEST_F(OptionalTest, ImmovableEmplace) {
+  Optional<Immovable> A;
+  Immovable::ResetCounts();
+  A.emplace(4);
+  EXPECT_TRUE((bool)A);
+  EXPECT_EQ(4, A->val);
+  EXPECT_EQ(1u, Immovable::Constructions);
+  EXPECT_EQ(0u, Immovable::Destructions);
+}
+
 #if LLVM_HAS_RVALUE_REFERENCE_THIS
 
 TEST_F(OptionalTest, MoveGetValueOr) {
@@ -307,5 +377,18 @@ TEST_F(OptionalTest, MoveGetValueOr) {
 
 #endif // LLVM_HAS_RVALUE_REFERENCE_THIS
 
+TEST_F(OptionalTest, NoneComparison) {
+  Optional<int> o;
+  EXPECT_EQ(o, None);
+  EXPECT_EQ(None, o);
+  EXPECT_FALSE(o != None);
+  EXPECT_FALSE(None != o);
+  o = 3;
+  EXPECT_FALSE(o == None);
+  EXPECT_FALSE(None == o);
+  EXPECT_TRUE(o != None);
+  EXPECT_TRUE(None != o);
+}
+
 } // end anonymous namespace