Linux Manuals

std::numeric_limits<T>::quiet_NaN – std::numeric_limits<T>::quiet_NaN Synopsis static T quiet_NaN() throw(); (until C++11) static constexpr T quiet_NaN() noexcept; (since C++11) Returns the special value "quiet not-a-number", as represented by the floating-point type T. Only meaningful if std::numeric_limits<T>::has_quiet_NaN == true. In IEEE 754, the most common binary representation of floating-point numbers, any value with all bits of the exponent…

std::numeric_limits<T>::min_exponent10 – std::numeric_limits<T>::min_exponent10 Synopsis static const int min_exponent10; (until C++ 11) static constexpr int min_exponent10; (since C++ 11) The value of std::numeric_limits<T>::min_exponent10 is the lowest negative number n such that 10n is a valid normalized value of the floating-point type T. Standard specializations T value of std::numeric_limits<T>::min_exponent10 /* non-specialized */ 0 bool 0 char 0…

std::numeric_limits<T>::min_exponent – std::numeric_limits<T>::min_exponent Synopsis static const int min_exponent; (until C++ 11) static constexpr int min_exponent; (since C++ 11) The value of std::numeric_limits<T>::min_exponent is the lowest negative number n such that rn-1 , where r is std::numeric_limits<T>::radix, is a valid normalized value of the floating-point type T. Standard specializations T value of std::numeric_limits<T>::min_exponent /* non-specialized */…

std::numeric_limits<T>::min – std::numeric_limits<T>::min Synopsis Defined in header <limits> static T min() throw(); (until C++11) static constexpr T min() noexcept; (since C++11) Returns the minimum finite value representable by the numeric type T. For floating-point types with denormalization, min returns the minimum positive normalized value. Note that this behavior may be unexpected, especially when compared to…

std::numeric_limits<T>::max_exponent10 – std::numeric_limits<T>::max_exponent10 Synopsis static const int max_exponent10; (until C++ 11) static constexpr int max_exponent10; (since C++ 11) The value of std::numeric_limits<T>::max_exponent10 is the largest positive number n such that 10n is a representable finite value of the floating-point type T. Standard specializations T value of std::numeric_limits<T>::max_exponent10 /* non-specialized */ 0 bool 0 char 0…

std::numeric_limits<T>::max_exponent – std::numeric_limits<T>::max_exponent Synopsis static const int max_exponent; (until C++ 11) static constexpr int max_exponent; (since C++ 11) The value of std::numeric_limits<T>::max_exponent is the largest positive number n such that rn-1 , where r is std::numeric_limits<T>::radix, is a representable finite value of the floating-point type T. Standard specializations T value of std::numeric_limits<T>::max_exponent /* non-specialized */…

std::numeric_limits<T>::max_digits10 – std::numeric_limits<T>::max_digits10 Synopsis static constexpr int max_digits10 (since C++11) The value of std::numeric_limits<T>::max_digits10 is the number of base-10 digits that are necessary to uniquely represent all distinct values of the type T, such as necessary for serialization/deserialization to text. This constant is meaningful for all floating-point types. Standard specializations T value of std::numeric_limits<T>::max_digits10 /*…

std::numeric_limits<T>::max – std::numeric_limits<T>::max Synopsis Defined in header <limits> static T max() throw(); (until C++11) static constexpr T max() noexcept; (since C++11) Returns the maximum finite value representable by the numeric type T. Meaningful for all bounded types. Return value T std::numeric_limits<T>::max() /* non-specialized */ T() bool true char CHAR_MAX signed char SCHAR_MAX unsigned char UCHAR_MAX…

std::numeric_limits<T>::lowest – std::numeric_limits<T>::lowest Synopsis static constexpr T lowest() noexcept; (since C++11) Returns the lowest finite value representable by the numeric type T, that is, a finite value x such that there is no other finite value y where y < x. This is different from std::numeric_limits<T>::min() for floating-point types. Only meaningful for bounded types. Return…

std::numeric_limits<T>::is_specialized – std::numeric_limits<T>::is_specialized Synopsis static const bool is_specialized; (until C++ 11) static constexpr bool is_specialized; (since C++ 11) The value of std::numeric_limits<T>::is_specialized is true for all T for which there exists a specialization of std::numeric_limits. Standard specializations T value of std::numeric_limits<T>::is_specialized /* non-specialized */ false bool true char true signed char true unsigned char true…

std::numeric_limits<T>::is_signed – std::numeric_limits<T>::is_signed Synopsis static const bool is_signed; (until C++ 11) static constexpr bool is_signed; (since C++ 11) The value of std::numeric_limits<T>::is_signed is true for all signed arithmetic types T and false for the unsigned types. This constant is meaningful for all specializations. Standard specializations T value of std::numeric_limits<T>::is_signed /* non-specialized */ false bool false…

std::numeric_limits<T>::is_modulo – std::numeric_limits<T>::is_modulo Synopsis static const bool is_modulo; (until C++ 11) static constexpr bool is_modulo; (since C++ 11) The value of std::numeric_limits<T>::is_modulo is true for all arithmetic types T that are possible to (until C++11)handle overflows with modulo arithmetic, that is, if the result of addition, subtraction, multiplication, or division of this type would fall…

std::numeric_limits<T>::is_integer – std::numeric_limits<T>::is_integer Synopsis static const bool is_integer; (until C++ 11) static constexpr bool is_integer; (since C++ 11) The value of std::numeric_limits<T>::is_integer is true for all integer arithmetic types T and false otherwise. This constant is meaningful for all specializations. Standard specializations T value of std::numeric_limits<T>::is_integer /* non-specialized */ false bool true char true signed…

std::numeric_limits<T>::is_iec559 – std::numeric_limits<T>::is_iec559 Synopsis static const bool is_iec559; (until C++ 11) static constexpr bool is_iec559; (since C++ 11) 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. Standard specializations T value of…

std::numeric_limits<T>::is_exact – std::numeric_limits<T>::is_exact Synopsis static const bool is_exact; (until C++ 11) static constexpr bool is_exact; (since C++ 11) The value of std::numeric_limits<T>::is_exact is true for all arithmetic types T that use exact representation. Standard specializations T value of std::numeric_limits<T>::is_exact /* non-specialized */ false bool true char true signed char true unsigned char true wchar_t true…

std::numeric_limits<T>::is_bounded – std::numeric_limits<T>::is_bounded Synopsis static const bool is_bounded; (until C++ 11) static constexpr bool is_bounded; (since C++ 11) The value of std::numeric_limits<T>::is_bounded is true for all arithmetic types T that represent a finite set of values. While all fundamental types are bounded, this constant would be false in a specialization of std::numeric_limits for a library-provided…

std::numeric_limits<T>::infinity – std::numeric_limits<T>::infinity Synopsis static T infinity() throw(); (until C++11) static constexpr T infinity() noexcept; (since C++11) Returns the special value "positive infinity", as represented by the floating-point type T. Only meaningful if std::numeric_limits<T>::has_infinity == true. In IEEE 754, the most common binary representation of floating-point numbers, the positive infinity is the value with all…

std::numeric_limits<T>::has_signaling_NaN – std::numeric_limits<T>::has_signaling_NaN Synopsis static const bool has_signaling_NaN; (until C++ 11) static constexpr bool has_signaling_NaN; (since C++ 11) The value of std::numeric_limits<T>::has_signaling_NaN is true for all types T capable of representing the special value "Signaling Not-A-Number". This constant is meaningful for all floating-point types and is guaranteed to be true if std::numeric_limits<T>::is_iec559 == true. Standard…

std::numeric_limits<T>::has_quiet_NaN – std::numeric_limits<T>::has_quiet_NaN Synopsis static const bool has_quiet_NaN; (until C++ 11) static constexpr bool has_quiet_NaN; (since C++ 11) The value of std::numeric_limits<T>::has_quiet_NaN is true for all types T capable of representing the special value "Quiet Not-A-Number". This constant is meaningful for all floating-point types and is guaranteed to be true if std::numeric_limits<T>::is_iec559 == true. Standard…

std::numeric_limits<T>::has_infinity – std::numeric_limits<T>::has_infinity Synopsis static const bool has_infinity; (until C++ 11) static constexpr bool has_infinity; (since C++ 11) The value of std::numeric_limits<T>::has_infinity is true for all types T capable of representing the positive infinity as a distinct special value. This constant is meaningful for all floating-point types and is guaranteed to be true if std::numeric_limits<T>::is_iec559…