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)

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`
`signed char`	`std::denorm_absent`
`unsigned char`	`std::denorm_absent`
`wchar_t`	`std::denorm_absent`
`char8_t`	`std::denorm_absent`
`char16_t`	`std::denorm_absent`
`char32_t`	`std::denorm_absent`
`short`	`std::denorm_absent`
`unsigned short`	`std::denorm_absent`
`int`	`std::denorm_absent`
`unsigned int`	`std::denorm_absent`
`long`	`std::denorm_absent`
`unsigned long`	`std::denorm_absent`
`long long`	`std::denorm_absent`
`unsigned long long`	`std::denorm_absent`
`float`	usually `std::denorm_present`
`double`	usually `std::denorm_present`
`long double`	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)