diff options
Diffstat (limited to 'indra/llcommon/function_types.h')
-rw-r--r-- | indra/llcommon/function_types.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/indra/llcommon/function_types.h b/indra/llcommon/function_types.h new file mode 100644 index 0000000000..3f42f6d640 --- /dev/null +++ b/indra/llcommon/function_types.h @@ -0,0 +1,49 @@ +/** + * @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) */ |