std::numeric_limits::has_denorm

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C++ Standard Library
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std::numeric_limits
Static constants numeric_limits::is_specialized numeric_limits::is_signed numeric_limits::is_integer numeric_limits::is_exact numeric_limits::has_infinity numeric_limits::has_quiet_NaN numeric_limits::has_signaling_NaN numeric_limits::has_denorm numeric_limits::has_denorm_loss numeric_limits::round_style numeric_limits::is_iec559 numeric_limits::is_bounded numeric_limits::is_modulo numeric_limits::digits numeric_limits::digits10 numeric_limits::max_digits10 (C++11) numeric_limits::radix numeric_limits::min_exponent numeric_limits::min_exponent10 numeric_limits::max_exponent numeric_limits::max_exponent10 numeric_limits::traps numeric_limits::tinyness_before Static member functions numeric_limits::min numeric_limits::lowest (C++11) numeric_limits::max numeric_limits::epsilon numeric_limits::round_error numeric_limits::infinity numeric_limits::quiet_NaN numeric_limits::signaling_NaN numeric_limits::denorm_min Helper types float_round_style float_denorm_style

static const std::float_denorm_style has_denorm		(pre-C++11 version)
static constexpr std::float_denorm_style has_denorm		(C++11 version)

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

[edit] Standard specializations

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
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

[edit] See also

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 (class)