Linux Manuals session 3

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…

std::numeric_limits<T>::has_denorm_loss – std::numeric_limits<T>::has_denorm_loss Synopsis static const bool has_denorm_loss; (until C++ 11) static constexpr bool has_denorm_loss; (since C++ 11) The value of std::numeric_limits<T>::has_denorm_loss is true for all floating-point types T that detect loss of precision when creating a subnormal number as denormalization loss rather than as inexact result (see below). Standard specializations T value of std::numeric_limits<T>::has_denorm_loss…

std::numeric_limits<T>::has_denorm – std::numeric_limits<T>::has_denorm Synopsis static const std::float_denorm_style has_denorm; (until C++ 11) static constexpr std::float_denorm_style has_denorm; (since C++ 11) The value of std::numeric_limits<T>::has_denorm identifies the floating-point types that support subnormal_values. 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 char8_t std::denorm_absent char16_t std::denorm_absent…

std::numeric_limits<T>::epsilon – std::numeric_limits<T>::epsilon Synopsis static T epsilon() throw(); (until C++11) static constexpr T epsilon() noexcept; (since C++11) Returns the machine epsilon, that is, the difference between 1.0 and the next value representable by the floating-point type T. It is only meaningful if std::numeric_limits<T>::is_integer == false. Return value T std::numeric_limits<T>::epsilon() /* non-specialized */ T() bool false…

std::numeric_limits<T>::digits10 – std::numeric_limits<T>::digits10 Synopsis static const int digits10; (until C++ 11) static constexpr int digits10(since C++ 11) The value of std::numeric_limits<T>::digits10 is the number of base-10 digits that can be represented by the type T without change, that is, any number with this many significant decimal digits can be converted to a value of type…

std::numeric_limits<T>::digits – std::numeric_limits<T>::digits Synopsis static const int digits; (until C++ 11) static constexpr int digits; (since C++ 11) The value of std::numeric_limits<T>::digits is the number of digits in base-radix that can be represented by the type T without change. For integer types, this is the number of bits not counting the sign bit and the…

std::numeric_limits<T>::denorm_min – std::numeric_limits<T>::denorm_min Synopsis static T denorm_min() throw(); (until C++11) static constexpr T denorm_min() noexcept; (since C++11) Returns the minimum positive subnormal_value of the type T, if std::numeric_limits<T>::has_denorm != std::denorm_absent, otherwise returns std::numeric_limits<T>::min(). Only meaningful for floating-point types. Return value T std::numeric_limits<T>::denorm_min() /* non-specialized */ T() bool false char 0 signed char 0 unsigned char…

std::numeric_limits – std::numeric_limits Synopsis Defined in header <limits> template< class T > class numeric_limits; The numeric_limits class template provides a standardized way to query various properties of arithmetic types (e.g. the largest possible value for type int is std::numeric_limits<int>::max()). This information is provided via specializations of the numeric_limits template. The standard library makes available specializations…

std::num_put<CharT,OutputIt>::~num_put – std::num_put<CharT,OutputIt>::~num_put Synopsis Defined in header <locale> protected: ~num_put(); Destructs a std::num_put facet. This destructor is protected and virtual (due to base_class destructor being virtual). An object of type std::num_put, like most facets, can only be destroyed when the last std::locale object that implements this facet goes out of scope or if a user-defined…

std::num_get<CharT,InputIt>::~num_get – std::num_get<CharT,InputIt>::~num_get Synopsis Defined in header <locale> protected: ~num_get(); Destructs a std::num_get facet. This destructor is protected and virtual (due to base_class destructor being virtual). An object of type std::num_get, like most facets, can only be destroyed when the last std::locale object that implements this facet goes out of scope or if a user-defined…

std::nullptr_t – std::nullptr_t Synopsis Defined in header <cstddef> typedef decltype(nullptr) nullptr_t; (since C++11) std::nullptr_t is the type of the null pointer literal, nullptr. It is a distinct type that is not itself a pointer type or a pointer to member type. Example If two or more overloads accept different pointer types, an overload for std::nullptr_t…

std::nullopt_t – std::nullopt_t Synopsis Defined in header <optional> struct nullopt_t; (since C++17) std::nullopt_t is an empty class type used to indicate optional type with uninitialized state. In particular, std::optional has a constructor with nullopt_t as a single argument, which creates an optional that does not contain a value. std::nullopt_t must be a non-aggregate LiteralType and…

std::nullopt – std::nullopt Synopsis Defined in header <optional> inline constexpr nullopt_t nullopt{/*unspecified*/}; (since C++17) std::nullopt is a constant of type std::nullopt_t that is used to indicate optional type with uninitialized state. See also nullopt_t indicator of optional type with uninitialized state           (class) (C++17)

std::nth_element – std::nth_element Synopsis Defined in header<algorithm> template <class RandomIt> (until C++ 20) void nth_element(RandomIt first, RandomIt nth, RandomIt last); template <class RandomIt> (since C++ 20) constexpr void nth_element(RandomIt first, RandomIt nth, RandomIt last); template <class ExecutionPolicy, class RandomIt> void nth_element(ExecutionPolicy &&policy, (2)(since C++ 17) RandomIt first, RandomIt nth, RandomIt last); template <class RandomIt, class…