std::numeric_limits<T>::has_denorm

 

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rel_ops::operator!=rel_ops::operator>rel_ops::operator<=rel_ops::operator>=
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three_way_comparablethree_way_comparable_with
strong_ordering weak_ordering partial_ordering common_comparison_category compare_three_way_result compare_three_way	strong_order weak_order partial_order compare_strong_order_fallback compare_weak_order_fallback compare_partial_order_fallback	is_eqis_neqis_ltis_lteqis_gtis_gteq
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C 数值极限接口
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std::numeric_limits

静态常量

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

静态成员函数

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

辅助类型

float_round_style

float_denorm_style

 

static const std::float_denorm_style has_denorm;		(C++11 前)
static constexpr std::float_denorm_style has_denorm;		(C++11 起)

std::numeric_limits<T>::has_denorm 的值鉴别浮点类型如何支持非正规值。

标准特化

T	std::numeric_limits<T>::has_denorm 的值
/* 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	通常为 std::denorm_present
double	通常为 std::denorm_present
long double	通常为 std::denorm_present

参阅

denorm_min [静态]	返回给定浮点类型的最小正非正规值 (公开静态成员函数)
float_denorm_style	指示浮点非规格化模式 (枚举)