std::numeric_limits::is_iec559

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C++
 
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rel_ops::operator!=
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类型的支持
基本类型
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Basic types
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基本类型
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C数字限制接口
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is_constructible
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is_move_constructible
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is_assignable
is_trivially_assignable
is_nothrow_assignable		（C++11）
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is_copy_assignable
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is_nothrow_copy_assignable		（C++11）
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is_move_assignable
is_trivially_move_assignable
is_nothrow_move_assignable		（C++11）
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is_destructible
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std::numeric_limits
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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
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Static member functions
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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
助手类型
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Helper types
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float_round_style
float_denorm_style
 
static const bool is_iec559
 （至 C++11）
static constexpr bool is_iec559
 （C++11 起）
std::numeric_limits<T>::is_iec559true所有的浮点类型T符合IEC 559（IEEE 754）标准的要求。如果std::numeric_limits<T>::is_iec559是true，然后std::numeric_limits<T>::has_infinity，std::numeric_limits<T>::has_quiet_NaN，并std::numeric_limits<T>::has_signaling_NaN也true.
Original:
The value of std::numeric_limits<T>::is_iec559 is true for all floating-point types T which fulfill the requirements of IEC 559 (IEEE 754) standard. If std::numeric_limits<T>::is_iec559 is true, then std::numeric_limits<T>::has_infinity, std::numeric_limits<T>::has_quiet_NaN, and std::numeric_limits<T>::has_signaling_NaN are also true.
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[编辑] 标准的专业

T
值的std::numeric_limits<T>::is_iec559
Original:
value of std::numeric_limits<T>::is_iec559
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/* non-specialized */ false
bool false
char false
signed char false
unsigned char false
wchar_t false
char16_t false
char32_t false
short false
unsigned short false
int false
unsigned int false
long false
unsigned long false
long long false
unsigned long long false
float
通常true
Original:
usually true
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double
通常true
Original:
usually true
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long double
通常true
Original:
usually true
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[编辑] 另请参阅

[静态的] </ SPAN></div></div>
确定浮点类型，可以代表特殊值“正无穷大”
Original:
identifies floating-point types that can represent the special value "positive infinity"
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（公共静态成员常量） [edit]
[静态的] </ SPAN></div></div>
确定浮点类型，可以代表特殊值“安静的不是一个数字”（NaN）
Original:
identifies floating-point types that can represent the special value "quiet not-a-number" (NaN)
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（公共静态成员常量） [edit]
[静态的] </ SPAN></div></div>
确定浮点类型可以代表的特殊价值“不是一个数字”（NaN）的信号
Original:
identifies floating-point types that can represent the special value "signaling not-a-number" (NaN)
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（公共静态成员常量） [edit]

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