diff options
| -rw-r--r-- | phosphor-logging/log.hpp | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/phosphor-logging/log.hpp b/phosphor-logging/log.hpp index a5ba738..a933591 100644 --- a/phosphor-logging/log.hpp +++ b/phosphor-logging/log.hpp @@ -17,6 +17,7 @@ #pragma once #include <tuple> +#include <type_traits> #include <systemd/sd-journal.h> #include <sdbusplus/server/transaction.hpp> @@ -135,11 +136,43 @@ void log(Msg msg, Entry... e) details::log(log_tuple); } +template<class T> +struct is_printf_argtype + : std::integral_constant< + bool, + (std::is_integral<typename std::remove_reference<T>::type>::value || + std::is_enum<typename std::remove_reference<T>::type>::value || + std::is_floating_point<typename + std::remove_reference<T>::type>::value || + std::is_pointer<typename std::decay<T>::type>::value)> +{}; + +template<class T> +struct is_char_ptr_argtype + : std::integral_constant< + bool, + (std::is_pointer<typename std::decay<T>::type>::value && + std::is_same<typename std::remove_cv<typename + std::remove_pointer<typename + std::decay<T>::type>::type>::type, + char>::value)> +{}; + +template<bool...> +struct bool_pack; + +template<bool... bs> +using all_true = std::is_same<bool_pack<bs..., true>, bool_pack<true, bs...>>; + template <typename Arg, typename ...Args> constexpr auto entry(Arg&& arg, Args&&... args) { + static_assert(is_char_ptr_argtype<Arg>::value, + "bad argument type: use char*"); + static_assert(all_true<is_printf_argtype<Args>::value...>::value, + "bad argument type: use string.c_str() if needed"); const auto entry_tuple = std::make_tuple(std::forward<Arg>(arg), - std::forward<Args>(args)...); + std::forward<Args>(args)...); return entry_tuple; } |
