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add an extra check if the user mis-declares formatter<custom_type>::store()'s first arguments as non-reference

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yumeyao 2021-03-02 14:40:33 +08:00
parent 91c5d66003
commit 36d14b8ce3
1 changed files with 3 additions and 1 deletions
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4
include/fmt/fmtlog.h
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@ -67,7 +67,9 @@ using stored_as_string_object = std::integral_constant<bool, stored_as_string<Ty
struct custom_store_method_checker {
template <typename Arg, typename Context, typename RawT = std::decay_t<Arg>, typename Formatter = typename Context::template formatter_type<RawT>>
static std::enable_if_t<has_formatter<RawT, Context>::value, std::tuple<std::true_type, decltype(Formatter::store(std::declval<char*&>(), std::declval<Arg>()))>> test(int);
static std::enable_if_t<has_formatter<RawT, Context>::value, std::tuple<std::true_type, decltype(Formatter::store(std::declval<char*&>(), std::declval<Arg>()))>> test(double);
template <typename Arg, typename Context, typename RawT = std::decay_t<Arg>, typename Formatter = typename Context::template formatter_type<RawT>>
static std::enable_if_t<has_formatter<RawT, Context>::value, std::tuple<std::false_type, decltype(Formatter::store(std::declval<char*>(), std::declval<Arg>()))>> test(int);
template <typename Arg, typename Context>
static std::tuple<std::false_type, store_as_object> test(...);
};