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Don't specialize std::is_floating_point

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This commit is contained in:
Victor Zverovich
2025-04-26 08:17:05 -07:00
parent 906eaf2ddb
commit 9db5e4df22
2 changed files with 7 additions and 8 deletions
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11
include/fmt/format.h
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@ -721,11 +721,10 @@ struct float128 {};
template <typename T> using is_float128 = std::is_same<T, float128>;
template <typename T>
using is_floating_point =
bool_constant<std::is_floating_point<T>::value || is_float128<T>::value>;
template <typename T> struct is_floating_point : std::is_floating_point<T> {};
template <> struct is_floating_point<float128> : std::true_type {};
template <typename T, bool = std::is_floating_point<T>::value>
template <typename T, bool = is_floating_point<T>::value>
struct is_fast_float : bool_constant<std::numeric_limits<T>::is_iec559 &&
sizeof(T) <= sizeof(double)> {};
template <typename T> struct is_fast_float<T, false> : std::false_type {};
@ -2472,8 +2471,8 @@ template <typename T>
struct has_isfinite<T, enable_if_t<sizeof(std::isfinite(T())) != 0>>
: std::true_type {};
template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value&&
has_isfinite<T>::value)>
template <typename T,
FMT_ENABLE_IF(is_floating_point<T>::value&& has_isfinite<T>::value)>
FMT_CONSTEXPR20 auto isfinite(T value) -> bool {
constexpr T inf = T(std::numeric_limits<double>::infinity());
if (is_constant_evaluated())

4
test/format-impl-test.cc
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@ -307,7 +307,6 @@ struct slow_float {
auto format_as(slow_float f) -> float { return f; }
namespace std {
template <> struct is_floating_point<double_double> : std::true_type {};
template <> struct numeric_limits<double_double> {
// is_iec559 is true for double-double in libstdc++.
static constexpr bool is_iec559 = true;
@ -315,12 +314,13 @@ template <> struct numeric_limits<double_double> {
static constexpr int digits10 = 33;
};
template <> struct is_floating_point<slow_float> : std::true_type {};
template <> struct numeric_limits<slow_float> : numeric_limits<float> {};
} // namespace std
FMT_BEGIN_NAMESPACE
namespace detail {
template <> struct is_floating_point<double_double> : std::true_type {};
template <> struct is_floating_point<slow_float> : std::true_type {};
template <> struct is_fast_float<slow_float> : std::false_type {};
namespace dragonbox {
template <> struct float_info<slow_float> {