Type erased hash_slot_fn that depends only on key types (and hash function).

PiperOrigin-RevId: 603148301
Change-Id: Ie2e5702995c9e1ef4d5aaab23bc89a1eb5007a86

1 files changed, 14 insertions, 0 deletions

diff --git a/absl/container/internal/container_memory_test.cc b/absl/container/internal/container_memory_test.cc
index c973ac25..7e4357d5 100644
--- a/absl/container/internal/container_memory_test.cc
+++ b/absl/container/internal/container_memory_test.cc
@@ -298,6 +298,20 @@ TEST(MapSlotPolicy, DestroyReturnsTrue) {
   }
 }
 
+TEST(ApplyTest, TypeErasedApplyToSlotFn) {
+  size_t x = 7;
+  auto fn = [](size_t v) { return v * 2; };
+  EXPECT_EQ((TypeErasedApplyToSlotFn<decltype(fn), size_t>(&fn, &x)), 14);
+}
+
+TEST(ApplyTest, TypeErasedDerefAndApplyToSlotFn) {
+  size_t x = 7;
+  auto fn = [](size_t v) { return v * 2; };
+  size_t* x_ptr = &x;
+  EXPECT_EQ(
+      (TypeErasedDerefAndApplyToSlotFn<decltype(fn), size_t>(&fn, &x_ptr)), 14);
+}
+
 }  // namespace
 }  // namespace container_internal
 ABSL_NAMESPACE_END