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Merged
blowekamp merged 1 commit into from
Oct 10, 2024
Merged

Use variadic template for function traits and bindings #2197

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70 changes: 8 additions & 62 deletions Code/Common/include/Ancillary/FunctionTraits.h
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Original file line number Diff line number Diff line change
Expand Up @@ -19,77 +19,23 @@
#define __FunctionTraits_h

#include "sitkMacro.h"
#include <functional>

namespace detail
{

template <typename FunctionType>
struct SITK_ABI_HIDDEN FunctionTraits;

template <typename R, typename C>
struct SITK_ABI_HIDDEN FunctionTraits<R (C::*)(void)>
{
static const unsigned int arity = 0;
using ClassType = C;
using ResultType = R;
};


template <typename R, typename C, typename A0>
struct SITK_ABI_HIDDEN FunctionTraits<R (C::*)(A0)>
template <typename Ret, typename C, typename... Args>
struct SITK_ABI_HIDDEN FunctionTraits<Ret (C::*)(Args...)>
{
static const unsigned int arity = 1;
static constexpr unsigned int arity = sizeof...(Args);
using ClassType = C;
using ResultType = R;
using Argument0Type = A0;
};


template <typename R, typename C, typename A0, typename A1>
struct SITK_ABI_HIDDEN FunctionTraits<R (C::*)(A0, A1)>
{
static const unsigned int arity = 2;
using ClassType = C;
using ResultType = R;
using Argument0Type = A0;
using Argument1Type = A1;
};
using ResultType = Ret;
template <std::size_t J>
using ArgumentType = std::tuple_element_t<J, std::tuple<Args...>>;
using FunctionObjectType = std::function<Ret(Args...)>;


template <typename R, typename C, typename A0, typename A1, typename A2>
struct SITK_ABI_HIDDEN FunctionTraits<R (C::*)(A0, A1, A2)>
{
static const unsigned int arity = 3;
using ClassType = C;
using ResultType = R;
using Argument0Type = A0;
using Argument1Type = A1;
using Argument2Type = A2;
};

template <typename R, typename C, typename A0, typename A1, typename A2, typename A3>
struct SITK_ABI_HIDDEN FunctionTraits<R (C::*)(A0, A1, A2, A3)>
{
static const unsigned int arity = 4;
using ClassType = C;
using ResultType = R;
using Argument0Type = A0;
using Argument1Type = A1;
using Argument2Type = A2;
using Argument3Type = A3;
};

template <typename R, typename C, typename A0, typename A1, typename A2, typename A3, typename A4>
struct SITK_ABI_HIDDEN FunctionTraits<R (C::*)(A0, A1, A2, A3, A4)>
{
static const unsigned int arity = 5;
using ClassType = C;
using ResultType = R;
using Argument0Type = A0;
using Argument1Type = A1;
using Argument2Type = A2;
using Argument3Type = A3;
using Argument4Type = A4;
};

} // namespace detail
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