Turned as_value into a new format callable

include/eve/module/core/constant/as_value.hpp

@@ -16,53 +16,54 @@
 
 namespace eve
 {
-//================================================================================================
-//! @addtogroup core_conversions
-//! @{
-//!   @var as_value
-//!   @brief converts eve constant or just a value to a type.
-//!
-//!   **Defined in Header**
-//!
-//!   @code
-//!   #include <eve/module/core.hpp>
-//!   @endcode
-//!
-//!   @groupheader{Callable Signatures}
-//!
-//!   @code
-//!   namespace eve
-//!   {
-//!      template< eve::value From, eve::value T >
-//!      T as_value(From x, eve::as<T> t) noexcept;
-//!   }
-//!   @endcode
-//!
-//!   **Parameters**
-//!
-//!      * `x`: either something convertible to T or an of eve constant
-//!      * `t` :  [Type wrapper](@ref eve::as) instance embedding the type of the constant.
-//!
-//!    **Return value**
-//!
-//!      The call `eve::as_value(as<T>())` returns a value of type T which is
-//!      the conversion of `x` to type Target or the the eve constant of type Target.
-//!
-//!  @groupheader{Example}
-//!  @godbolt{doc/core/constant/as_value.cpp}
-//================================================================================================
-  EVE_MAKE_CALLABLE(as_value_, as_value);
-
-  namespace detail
+  template<typename Options>
+  struct as_value_t : constant_callable<as_value_t, Options>
   {
     template<typename From, value T>
-    EVE_FORCEINLINE constexpr auto as_value_(EVE_SUPPORTS(cpu_), From from, as<T> const& t) noexcept
+    EVE_FORCEINLINE constexpr T operator()(From from, as<T> t) const noexcept
     {
-         if constexpr( requires { typename From::constant_callable_tag; } ) return from(t);//if constexpr( instance_of<From,functor> ) return from(t);
-    else if constexpr( scalar_value<T> ) return static_cast<T>(from);
-    else return T {from};
+      if      constexpr (requires { typename From::constant_callable_tag; }) return from(t);
+      else if constexpr (scalar_value<T>)                                    return static_cast<T>(from);
+      else                                                                   return T{from};
     }
-  }
+  };
+
+  //================================================================================================
+  //! @addtogroup core_conversions
+  //! @{
+  //!   @var as_value
+  //!   @brief converts eve constant or just a value to a type.
+  //!
+  //!   **Defined in Header**
+  //!
+  //!   @code
+  //!   #include <eve/module/core.hpp>
+  //!   @endcode
+  //!
+  //!   @groupheader{Callable Signatures}
+  //!
+  //!   @code
+  //!   namespace eve
+  //!   {
+  //!      template< eve::value From, eve::value T >
+  //!      T as_value(From x, eve::as<T> t) noexcept;
+  //!   }
+  //!   @endcode
+  //!
+  //!   **Parameters**
+  //!
+  //!      * `x`: either something convertible to T or an of eve constant
+  //!      * `t` :  [Type wrapper](@ref eve::as) instance embedding the type of the constant.
+  //!
+  //!    **Return value**
+  //!
+  //!      The call `eve::as_value(as<T>())` returns a value of type T which is
+  //!      the conversion of `x` to type Target or the the eve constant of type Target.
+  //!
+  //!  @groupheader{Example}
+  //!  @godbolt{doc/core/constant/as_value.cpp}
+  //================================================================================================
+  inline constexpr auto as_value = functor<as_value_t>;
   //================================================================================================
   //! @}
   //================================================================================================