From 298ee421d9dcb6af3d29833f4cf636bb088356fb Mon Sep 17 00:00:00 2001
From: Steven Le Rouzic <steven.lerouzic@gmail.com>
Date: Thu, 15 Aug 2024 00:58:37 +0200
Subject: Some work on pointers

---
 asl/ptr.hpp | 106 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 106 insertions(+)
 create mode 100644 asl/ptr.hpp

(limited to 'asl/ptr.hpp')

diff --git a/asl/ptr.hpp b/asl/ptr.hpp
new file mode 100644
index 0000000..70dfa7b
--- /dev/null
+++ b/asl/ptr.hpp
@@ -0,0 +1,106 @@
+#pragma once
+
+#include "asl/integers.hpp"
+#include "asl/meta.hpp"
+#include "asl/utility.hpp"
+
+namespace asl {
+
+namespace ptr_internal {
+
+template<is_object T>
+class object_meta
+{
+public:
+    using pointee = T;
+    using metadata = empty;
+};
+
+template<is_void T>
+class void_meta
+{
+public:
+    using pointee = T;
+    using metadata = empty;
+};
+
+template<typename T>
+class array_meta;
+
+template<is_object T, isize_t N>
+class array_meta<T[N]>
+{
+public:
+    using pointee = T[N];
+    using metadata = empty;
+};
+
+template<is_object T>
+class array_meta<T[]>
+{
+public:
+    using pointee = T;
+    using metadata = isize_t;
+};
+
+template<typename T>
+class ptr_like_meta
+{
+    static_assert(is_func<T> || is_ref<T>);
+    
+public:
+    using pointee = as_raw_ptr_t<T>;
+    using metadata = empty;
+};
+
+template<typename T>
+constexpr auto get_meta()
+{
+    if constexpr (is_object<T>)
+    {
+        return object_meta<T>{};
+    }
+    else if constexpr (is_void<T>)
+    {
+        return void_meta<T>{};
+    }
+    else if constexpr (is_array<T>)
+    {
+        return array_meta<T>{};
+    }
+    else if constexpr (is_ref<T> || is_func<T>)
+    {
+        return ptr_like_meta<T>{};
+    }
+}
+
+template<typename T>
+using meta = decltype(get_meta<T>());
+
+} // namespace ptr_internal
+
+template<typename T>
+concept is_ptr_metadata = requires
+{
+    requires is_object<typename T::pointee> || is_void<typename T::pointee> || is_array<typename T::pointee>;
+    requires is_object<typename T::metadata>;
+};
+
+template<typename T>
+class ptr final
+{
+    using meta = ptr_internal::meta<T>;
+    static_assert(is_ptr_metadata<meta>);
+    
+public:
+    using pointee = meta::pointee;
+    using metadata = meta::metadata;
+
+private:
+    pointee* m_ptr = nullptr;
+    ASL_NO_UNIQUE_ADDRESS metadata m_metadata;
+
+public:
+};
+
+} // namespace asl
-- 
cgit