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use fixed_string to create named arg class with static name for _a literal

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This commit is contained in:
Alexey Ochapov
2021-04-18 08:10:00 +03:00
committed by Victor Zverovich
parent fc56af14c2
commit ce6e7d8620
2 changed files with 42 additions and 13 deletions
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27
include/fmt/core.h
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@@ -979,16 +979,22 @@ struct arg_data<T, Char, NUM_ARGS, 0> {
template <typename Char>
inline void init_named_args(named_arg_info<Char>*, int, int) {}
template <typename Char, typename T, typename... Tail>
template <typename T> struct is_named_arg : std::false_type {};
template <typename T, typename Char>
struct is_named_arg<named_arg<Char, T>> : std::true_type {};
template <typename Char, typename T, typename... Tail,
FMT_ENABLE_IF(!is_named_arg<T>::value)>
void init_named_args(named_arg_info<Char>* named_args, int arg_count,
int named_arg_count, const T&, const Tail&... args) {
init_named_args(named_args, arg_count + 1, named_arg_count, args...);
}
template <typename Char, typename T, typename... Tail>
template <typename Char, typename T, typename... Tail,
FMT_ENABLE_IF(is_named_arg<T>::value)>
void init_named_args(named_arg_info<Char>* named_args, int arg_count,
int named_arg_count, const named_arg<Char, T>& arg,
const Tail&... args) {
int named_arg_count, const T& arg, const Tail&... args) {
named_args[named_arg_count++] = {arg.name, arg_count};
init_named_args(named_args, arg_count + 1, named_arg_count, args...);
}
@@ -997,11 +1003,6 @@ template <typename... Args>
FMT_CONSTEXPR FMT_INLINE void init_named_args(std::nullptr_t, int, int,
const Args&...) {}
template <typename T> struct is_named_arg : std::false_type {};
template <typename T, typename Char>
struct is_named_arg<named_arg<Char, T>> : std::true_type {};
template <bool B = false> constexpr size_t count() { return B ? 1 : 0; }
template <bool B1, bool B2, bool... Tail> constexpr size_t count() {
return (B1 ? 1 : 0) + count<B2, Tail...>();
@@ -1277,10 +1278,10 @@ template <typename Context> struct arg_mapper {
return val;
}
template <typename T>
FMT_CONSTEXPR FMT_INLINE auto map(const named_arg<char_type, T>& val)
-> decltype(std::declval<arg_mapper>().map(val.value)) {
return map(val.value);
template <typename T, FMT_ENABLE_IF(is_named_arg<T>::value)>
FMT_CONSTEXPR FMT_INLINE auto map(const T& named_arg)
-> decltype(std::declval<arg_mapper>().map(named_arg.value)) {
return map(named_arg.value);
}
unformattable map(...) { return {}; }