Internal improvements: new strong types StackIndex and KeeperIndex

1 files changed, 2 insertions, 32 deletions

diff --git a/src/macros_and_utils.h b/src/macros_and_utils.h
index 1b1ced6..e73abef 100644
--- a/src/macros_and_utils.h
+++ b/src/macros_and_utils.h
@@ -2,6 +2,7 @@
 
 #include "debug.h"
 #include "luaerrors.h"
+#include "unique.hpp"
 
 using namespace std::chrono_literals;
 
@@ -24,40 +25,9 @@ using lua_Duration = std::chrono::template duration<lua_Number>;
 
 // #################################################################################################
 
-// A unique type generator
-template <typename T, auto = [] {}, typename specialization = void>
-class Unique
-{
-    private:
-    T val;
-
-    public:
-    using type = T;
-    Unique() = default;
-    operator T() const { return val; }
-    explicit Unique(T b_)
-    : val{ b_ }
-    {
-    }
-};
-
-template <typename T, auto lambda>
-class Unique<T, lambda, std::enable_if_t<!std::is_scalar_v<T>>>
-: public T
-{
-    public:
-    using type = T;
-    using T::T;
-    explicit Unique(T const& b_)
-    : T{ b_ }
-    {
-    }
-};
-
-// #################################################################################################
-
 using SourceState = Unique<lua_State*>;
 using DestState = Unique<lua_State*>;
+using StackIndex = Unique<int>;
 
 // #################################################################################################