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/**
* @file function_types.h
* @author Nat Goodspeed
* @date 2023-01-20
* @brief Extend boost::function_types to examine boost::function and
* std::function
*
* $LicenseInfo:firstyear=2023&license=viewerlgpl$
* Copyright (c) 2023, Linden Research, Inc.
* $/LicenseInfo$
*/
#if ! defined(LL_FUNCTION_TYPES_H)
#define LL_FUNCTION_TYPES_H
#include <boost/function.hpp>
#include <boost/function_types/function_arity.hpp>
#include <functional>
namespace LL
{
template <typename F>
struct function_arity_impl
{
static constexpr auto value = boost::function_types::function_arity<F>::value;
};
template <typename F>
struct function_arity_impl<std::function<F>>
{
static constexpr auto value = function_arity_impl<F>::value;
};
template <typename F>
struct function_arity_impl<boost::function<F>>
{
static constexpr auto value = function_arity_impl<F>::value;
};
template <typename F>
struct function_arity
{
static constexpr auto value = function_arity_impl<typename std::decay<F>::type>::value;
};
} // namespace LL
#endif /* ! defined(LL_FUNCTION_TYPES_H) */
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