temp test concepts

include/jlcxx/stl.hpp

@@ -2,6 +2,7 @@
 #define JLCXX_STL_HPP
 
 #include <type_traits>
+#include <concepts>
 #include <valarray>
 #include <vector>
 #include <deque>
@@ -257,36 +258,36 @@ struct WrapSet
  }
 };
 
-template <typename T, typename = void>
-struct has_less_than_operator : std::false_type {};
+// template <typename T, typename = void>
+// struct has_less_than_operator : std::false_type {};
 
-template <typename T>
-struct has_less_than_operator<T, std::void_t<decltype(std::declval<T>() < std::declval<T>())>>
- : std::true_type {};
+// template <typename T>
+// struct has_less_than_operator<T, std::void_t<decltype(std::declval<T>() < std::declval<T>())>>
+//  : std::true_type {};
 
-template <typename T>
-constexpr bool has_less_than_operator_v = has_less_than_operator<T>::value;
+// template <typename T>
+// constexpr bool has_less_than_operator_v = has_less_than_operator<T>::value;
 
-template <typename T, typename = void>
-struct is_container : std::false_type {};
+// template <typename T, typename = void>
+// struct is_container : std::false_type {};
 
-template <typename T>
-struct is_container<T, std::void_t<typename T::value_type>> : std::true_type {};
+// template <typename T>
+// struct is_container<T, std::void_t<typename T::value_type>> : std::true_type {};
 
-template <typename T, typename = void>
-struct container_has_less_than_operator : std::false_type {};
+// template <typename T, typename = void>
+// struct container_has_less_than_operator : std::false_type {};
 
-template <typename T>
-struct container_has_less_than_operator<T, std::enable_if_t<is_container<T>::value>>
- : std::conditional_t<
- has_less_than_operator<typename T::value_type>::value || 
- container_has_less_than_operator<typename T::value_type>::value,
- std::true_type, 
- std::false_type> {};
+// template <typename T>
+// struct container_has_less_than_operator<T, std::enable_if_t<is_container<T>::value>>
+//  : std::conditional_t<
+//  has_less_than_operator<typename T::value_type>::value || 
+//  container_has_less_than_operator<typename T::value_type>::value,
+//  std::true_type, 
+//  std::false_type> {};
 
-template <typename T>
-struct container_has_less_than_operator<T, std::enable_if_t<!is_container<T>::value>>
- : has_less_than_operator<T> {};
+// template <typename T>
+// struct container_has_less_than_operator<T, std::enable_if_t<!is_container<T>::value>>
+//  : has_less_than_operator<T> {};
 
 template<typename T>
 inline void apply_stl(jlcxx::Module& mod)
@@ -295,7 +296,7 @@ inline void apply_stl(jlcxx::Module& mod)
  TypeWrapper1(mod, StlWrappers::instance().valarray).apply<std::valarray<T>>(WrapValArray());
  TypeWrapper1(mod, StlWrappers::instance().deque).apply<std::deque<T>>(WrapDeque());
  TypeWrapper1(mod, StlWrappers::instance().queue).apply<std::queue<T>>(WrapQueue());
- if constexpr(container_has_less_than_operator<T>::value) 
+ if constexpr (std::totally_ordered<T>) 
  {
  TypeWrapper1(mod, StlWrappers::instance().set).apply<std::set<T>>(WrapSet());
  }