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Remove unformattable

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This commit is contained in:
Victor Zverovich 2024-09-15 17:28:27 -07:00
parent 8a19b2db77
commit 527e98e3f8
1 changed files with 13 additions and 21 deletions
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34
include/fmt/base.h
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@ -1123,9 +1123,7 @@ constexpr auto has_const_formatter() -> bool {
return has_const_formatter_impl<Char>(static_cast<T*>(nullptr));
}
struct unformattable {};
// Maps formatting argument types to a smaller set. Returns unformattable on
// Maps formatting argument types to a smaller set. Returns void on
// errors to be SFINAE-friendly.
template <typename Char> struct type_mapper {
static auto map(signed char) -> int;
@ -1143,16 +1141,14 @@ template <typename Char> struct type_mapper {
static auto map(bool) -> bool;
template <int N>
static auto map(bitint<N>)
-> conditional_t<N <= 64, long long, unformattable>;
static auto map(bitint<N>) -> conditional_t<N <= 64, long long, void>;
template <int N>
static auto map(ubitint<N>)
-> conditional_t<N <= 64, unsigned long long, unformattable>;
-> conditional_t<N <= 64, unsigned long long, void>;
template <typename T, FMT_ENABLE_IF(is_char<T>::value)>
static auto map(T) -> conditional_t<std::is_same<T, char>::value ||
std::is_same<T, Char>::value,
Char, unformattable>;
static auto map(T) -> conditional_t<
std::is_same<T, char>::value || std::is_same<T, Char>::value, Char, void>;
static auto map(float) -> float;
static auto map(double) -> double;
@ -1162,9 +1158,8 @@ template <typename Char> struct type_mapper {
static auto map(const Char*) -> const Char*;
template <typename T, typename C = char_t<T>,
FMT_ENABLE_IF(!std::is_pointer<T>::value)>
static auto map(const T&)
-> conditional_t<std::is_same<C, Char>::value, basic_string_view<C>,
unformattable>;
static auto map(const T&) -> conditional_t<std::is_same<C, Char>::value,
basic_string_view<C>, void>;
static auto map(void*) -> const void*;
static auto map(const void*) -> const void*;
@ -1173,7 +1168,7 @@ template <typename Char> struct type_mapper {
static auto map(std::nullptr_t) -> const void*;
template <typename T, FMT_ENABLE_IF(std::is_pointer<T>::value ||
std::is_member_pointer<T>::value)>
static auto map(const T&) -> unformattable;
static auto map(const T&) -> void;
template <typename T, std::size_t N, FMT_ENABLE_IF(!is_char<T>::value)>
static auto map(const T (&)[N]) -> const T (&)[N];
@ -1188,8 +1183,7 @@ template <typename Char> struct type_mapper {
!std::is_const<T>::value)> {};
template <typename T, FMT_ENABLE_IF(use_formatter<remove_const_t<T>>::value)>
static auto map(T&)
-> conditional_t<formattable<T>::value, T&, unformattable>;
static auto map(T&) -> conditional_t<formattable<T>::value, T&, void>;
template <typename T, FMT_ENABLE_IF(is_named_arg<T>::value)>
static auto map(const T& named_arg) -> decltype(map(named_arg.value));
@ -2200,7 +2194,7 @@ template <typename Context> class value {
private:
template <typename T> FMT_CONSTEXPR value(const T& x, custom_tag) {
using value_type = remove_cvref_t<T>;
enum { formattable = !std::is_same<T, unformattable>::value };
enum { formattable = !std::is_same<T, void>::value };
#if defined(__cpp_if_constexpr)
if constexpr (!formattable) type_is_unformattable_for<T, char_type> _;
@ -2730,11 +2724,9 @@ template <typename... T> struct fstring {
template <typename... T> using format_string = typename fstring<T...>::t;
template <typename T, typename Char = char>
using is_formattable = bool_constant<
!std::is_base_of<detail::unformattable,
detail::mapped_t<conditional_t<std::is_void<T>::value,
detail::unformattable, T>,
Char>>::value>;
using is_formattable = bool_constant<!std::is_same<
detail::mapped_t<conditional_t<std::is_void<T>::value, int*, T>, Char>,
void>::value>;
#ifdef __cpp_concepts
template <typename T, typename Char = char>
concept formattable = is_formattable<remove_reference_t<T>, Char>::value;