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Add value ctor taking name_arg

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This commit is contained in:
Victor Zverovich 2024-09-14 10:24:47 -07:00
parent 3f5e45dd33
commit 545dc4148a
1 changed files with 12 additions and 9 deletions
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21
include/fmt/base.h
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@ -1146,10 +1146,10 @@ template <typename Char> struct arg_mapper {
FMT_MAP_API auto map(long double x) -> long double { return x; }
template <int N>
FMT_MAP_API auto map(bitint<N>)
static auto map(bitint<N>)
-> conditional_t<N <= 64, long long, unformattable>;
template <int N>
FMT_MAP_API auto map(ubitint<N>)
static auto map(ubitint<N>)
-> conditional_t<N <= 64, unsigned long long, unformattable>;
FMT_MAP_API auto map(Char* x) -> const Char* { return x; }
@ -1228,9 +1228,7 @@ template <typename Char> struct arg_mapper {
}
template <typename T, FMT_ENABLE_IF(is_named_arg<T>::value)>
FMT_MAP_API auto map(const T& named_arg) -> decltype(map(named_arg.value)) {
return map(named_arg.value);
}
static auto map(const T& named_arg) -> decltype(map(named_arg.value));
FMT_MAP_API auto map(...) -> unformattable { return {}; }
};
@ -2187,12 +2185,18 @@ template <typename Context> class value {
}
FMT_INLINE value(const void* x FMT_BUILTIN) : pointer(x) {}
template <typename T, FMT_ENABLE_IF(is_named_arg<T>::value)>
value(const T& named_arg) : value(named_arg.value) {}
template <typename T, typename U = remove_cvref_t<T>>
using mappable =
bool_constant<!std::is_integral<U>::value && !is_named_arg<U>::value>;
// We can't use mapped_t because of a bug in MSVC 2017.
template <
typename T,
typename M = decltype(arg_mapper<char_type>::map(std::declval<T&>())),
FMT_ENABLE_IF(!std::is_same<T, M>::value &&
!std::is_integral<remove_cvref_t<T>>::value)>
FMT_ENABLE_IF(!std::is_same<T, M>::value && mappable<T>::value)>
FMT_CONSTEXPR20 FMT_INLINE value(T&& x) {
*this = arg_mapper<char_type>::map(x);
}
@ -2200,8 +2204,7 @@ template <typename Context> class value {
template <
typename T,
typename M = decltype(arg_mapper<char_type>::map(std::declval<T&>())),
FMT_ENABLE_IF(std::is_same<T, M>::value &&
!std::is_integral<remove_cvref_t<T>>::value)>
FMT_ENABLE_IF(std::is_same<T, M>::value&& mappable<T>::value)>
FMT_CONSTEXPR20 FMT_INLINE value(T&& x) {
// Formatting of arbitrary pointers is disallowed. If you want to format a
// pointer cast it to `void*` or `const void*`. In particular, this forbids