BLI: support value initialization in CPPType

Value initialization differs from default-construction in that it
also zero-initializes trivial types.

1 files changed, 34 insertions, 0 deletions

diff --git a/source/blender/blenlib/tests/BLI_cpp_type_test.cc b/source/blender/blenlib/tests/BLI_cpp_type_test.cc
index 94456e1ee28..f00767eda8c 100644
--- a/source/blender/blenlib/tests/BLI_cpp_type_test.cc
+++ b/source/blender/blenlib/tests/BLI_cpp_type_test.cc
@@ -118,6 +118,40 @@ TEST(cpp_type, DefaultConstruction)
   EXPECT_EQ(buffer[8], 0);
 }
 
+TEST(cpp_type, DefaultConstructTrivial)
+{
+  int value = 5;
+  CPPType::get<int>().default_construct(&value);
+  EXPECT_EQ(value, 5);
+}
+
+TEST(cpp_type, ValueInitialize)
+{
+  int buffer[10] = {0};
+  CPPType_TestType.value_initialize((void *)buffer);
+  EXPECT_EQ(buffer[0], default_constructed_value);
+  EXPECT_EQ(buffer[1], 0);
+  CPPType_TestType.value_initialize_n((void *)buffer, 3);
+  EXPECT_EQ(buffer[0], default_constructed_value);
+  EXPECT_EQ(buffer[1], default_constructed_value);
+  EXPECT_EQ(buffer[2], default_constructed_value);
+  EXPECT_EQ(buffer[3], 0);
+  CPPType_TestType.value_initialize_indices((void *)buffer, {2, 5, 7});
+  EXPECT_EQ(buffer[2], default_constructed_value);
+  EXPECT_EQ(buffer[4], 0);
+  EXPECT_EQ(buffer[5], default_constructed_value);
+  EXPECT_EQ(buffer[6], 0);
+  EXPECT_EQ(buffer[7], default_constructed_value);
+  EXPECT_EQ(buffer[8], 0);
+}
+
+TEST(cpp_type, ValueInitializeTrivial)
+{
+  int value = 5;
+  CPPType::get<int>().value_initialize(&value);
+  EXPECT_EQ(value, 0);
+}
+
 TEST(cpp_type, Destruct)
 {
   int buffer[10] = {0};