C++ 参考手册

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

[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)
指示浮点非规格化模式
(枚举)