std::numeric_limits<T>::has_denorm

static const std::float_denorm_style has_denorm;		(until C++11)
static constexpr std::float_denorm_style has_denorm;			(since C++11) (deprecated in C++23)

The value of std::numeric_limits<T>::has_denorm identifies the floating-point types that support subnormal values.

`T`	value of `std::numeric_limits<T>::has_denorm`
/* non-specialized */	`std::denorm_absent`
bool	`std::denorm_absent`
char	`std::denorm_absent`
signedchar	`std::denorm_absent`
unsignedchar	`std::denorm_absent`
wchar_t	`std::denorm_absent`
char8_t (since C++20)	`std::denorm_absent`
char16_t (since C++11)	`std::denorm_absent`
char32_t (since C++11)	`std::denorm_absent`
short	`std::denorm_absent`
unsignedshort	`std::denorm_absent`
int	`std::denorm_absent`
unsignedint	`std::denorm_absent`
long	`std::denorm_absent`
unsignedlong	`std::denorm_absent`
longlong (since C++11)	`std::denorm_absent`
unsignedlonglong (since C++11)	`std::denorm_absent`
float	usually `std::denorm_present`
double	usually `std::denorm_present`
longdouble	usually `std::denorm_present`

denorm_min [static]	returns the smallest positive subnormal value of the given floating-point type (public static member function)
float_denorm_style	indicates floating-point denormalization modes (enum)