Add index_pool_handle

2 files changed, 126 insertions, 1 deletions

diff --git a/asl/handle_pool/index_pool.hpp b/asl/handle_pool/index_pool.hpp
index f874386..1d359d5 100644
--- a/asl/handle_pool/index_pool.hpp
+++ b/asl/handle_pool/index_pool.hpp
@@ -52,5 +52,69 @@ struct index_pool_config
     static constexpr HandleType kUserMask  = ((HandleType{1} << kUserBits) - 1) << kUserShift;
 };
 
+template<
+    int kIndexBits_,
+    int kGenBits_,
+    typename UserType_ = empty,
+    int kUserBits_ = 0
+>
+class index_pool_handle
+{
+    // using config = index_pool_config<5, 5>;
+    using config = index_pool_config<kIndexBits_, kGenBits_, UserType_, kUserBits_>;
+
+    config::HandleType m_handle{};
+
+public:
+    constexpr index_pool_handle() = default;
+
+    constexpr index_pool_handle(uint64_t index, uint64_t gen)
+        requires (!config::kHasUser)
+        : m_handle{static_cast<config::HandleType>(
+            config::kValidMask |
+            (index & config::kIndexMask) |
+            ((gen << config::kGenShift) & config::kGenMask))}
+    {
+        ASL_ASSERT((index & uint64_t{config::kIndexMask}) == index);
+        ASL_ASSERT((gen & (uint64_t{config::kGenMask} >> config::kGenShift)) == gen);
+    }
+
+    constexpr index_pool_handle(uint64_t index, uint64_t gen, config::UserType user)
+        requires config::kHasUser
+        : m_handle{static_cast<config::HandleType>(
+            config::kValidMask |
+            (index & config::kIndexMask) |
+            ((gen << config::kGenShift) & config::kGenMask) |
+            ((static_cast<config::HandleType>(bit_cast<typename config::PrimitiveUserType>(user)) << config::kUserShift) & config::kUserMask))}
+    {
+        ASL_ASSERT((index & uint64_t{config::kIndexMask}) == index);
+        ASL_ASSERT((gen & (uint64_t{config::kGenMask} >> config::kGenShift)) == gen);
+        ASL_ASSERT((bit_cast<typename config::PrimitiveUserType>(user) & (uint64_t{config::kUserMask} >> config::kUserShift)) == bit_cast<typename config::PrimitiveUserType>(user));
+    }
+
+    constexpr bool is_valid(this index_pool_handle self)
+    {
+        return self.m_handle & config::kValidMask;
+    }
+
+    constexpr uint64_t index(this index_pool_handle self)
+    {
+        return self.m_handle & config::kIndexMask;
+    }
+
+    constexpr uint64_t gen(this index_pool_handle self)
+    {
+        return (self.m_handle & config::kGenMask) >> config::kGenShift;
+    }
+
+    constexpr config::UserType user(this index_pool_handle self)
+    {
+        return bit_cast<typename config::UserType>(static_cast<config::PrimitiveUserType>(
+            ((self.m_handle & config::kUserMask) >> config::kUserShift)));
+    }
+
+    constexpr bool operator==(this index_pool_handle self, index_pool_handle other) = default;
+};
+
 } // namespace asl
 
diff --git a/asl/handle_pool/index_pool_tests.cpp b/asl/handle_pool/index_pool_tests.cpp
index b49d0b9..3156320 100644
--- a/asl/handle_pool/index_pool_tests.cpp
+++ b/asl/handle_pool/index_pool_tests.cpp
@@ -44,6 +44,67 @@ static_assert(Cfg3::kUserMask  == uint16_t{0x7800});
 static_assert(Cfg3::kGenShift  == 5);
 static_assert(Cfg3::kUserShift == 11);
 
-ASL_TEST(test)
+static_assert(asl::default_constructible<asl::index_pool_handle<5, 5, uint8_t>>);
+static_assert(asl::trivially_copy_constructible<asl::index_pool_handle<5, 5, uint8_t>>);
+static_assert(asl::trivially_move_constructible<asl::index_pool_handle<5, 5, uint8_t>>);
+static_assert(asl::trivially_copy_assignable<asl::index_pool_handle<5, 5, uint8_t>>);
+static_assert(asl::trivially_move_assignable<asl::index_pool_handle<5, 5, uint8_t>>);
+static_assert(asl::trivially_destructible<asl::index_pool_handle<5, 5, uint8_t>>);
+
+ASL_TEST(default_is_invalid)
 {
+    const asl::index_pool_handle<5, 5, uint8_t> idx;
+    ASL_TEST_EXPECT(!idx.is_valid());
+}
+
+ASL_TEST(construct)
+{
+    const asl::index_pool_handle<5, 5> idx(9, 11);
+    ASL_TEST_EXPECT(idx.is_valid());
+    ASL_TEST_EXPECT(idx.index() == 9);
+    ASL_TEST_EXPECT(idx.gen() == 11);
+}
+
+ASL_TEST(construct_user)
+{
+    const asl::index_pool_handle<5, 5, Flags, 4> idx(9, 11, kFlag2);
+    ASL_TEST_EXPECT(idx.is_valid());
+    ASL_TEST_EXPECT(idx.index() == 9);
+    ASL_TEST_EXPECT(idx.gen() == 11);
+    ASL_TEST_EXPECT(idx.user() == kFlag2);
+    static_assert(asl::same_as<Flags, decltype(idx.user())>);
+}
+
+
+ASL_TEST(compare) // NOLINT
+{
+    const asl::index_pool_handle<5, 5, Flags, 4> idx_default;
+    const asl::index_pool_handle<5, 5, Flags, 4> idx0;
+    const asl::index_pool_handle<5, 5, Flags, 4> idx1(9, 11, kFlag2);
+    const asl::index_pool_handle<5, 5, Flags, 4> idx2(9, 11, kFlag1);
+    const asl::index_pool_handle<5, 5, Flags, 4> idx3(9, 11, kFlag1);
+    const asl::index_pool_handle<5, 5, Flags, 4> idx4(9, 10, kFlag2);
+    const asl::index_pool_handle<5, 5, Flags, 4> idx5(8, 11, kFlag2);
+
+    ASL_TEST_EXPECT(idx0 == idx_default);
+
+    ASL_TEST_EXPECT(idx0 != idx1);
+    ASL_TEST_EXPECT(idx0 != idx2);
+    ASL_TEST_EXPECT(idx0 != idx3);
+    ASL_TEST_EXPECT(idx0 != idx4);
+    ASL_TEST_EXPECT(idx0 != idx5);
+
+    ASL_TEST_EXPECT(idx1 != idx2);
+    ASL_TEST_EXPECT(idx1 != idx3);
+    ASL_TEST_EXPECT(idx1 != idx4);
+    ASL_TEST_EXPECT(idx1 != idx5);
+
+    ASL_TEST_EXPECT(idx2 == idx3);
+    ASL_TEST_EXPECT(idx2 != idx4);
+    ASL_TEST_EXPECT(idx2 != idx5);
+
+    ASL_TEST_EXPECT(idx3 != idx4);
+    ASL_TEST_EXPECT(idx3 != idx5);
+
+    ASL_TEST_EXPECT(idx4 != idx5);
 }