Section 3: library functions
std::launch – std::launch Synopsis Defined in header <future> enum class launch : /* unspecified */ { async = /* unspecified */, deferred = /* unspecified */, (since C++11) /* implementation-defined */ }; Specifies the launch policy for a task executed by the std::async function. std::launch is an enumeration used as BitmaskType. The following constants denoting…
std::laguerre,std::laguerref,std::laguerrel – std::laguerre,std::laguerref,std::laguerrel Synopsis double laguerre(unsigned int n, double x); float laguerre(unsigned int n, float x); long double laguerre(unsigned int n, long double x); (1)(since C++ 17) float laguerref(unsigned int n, float x); long double laguerrel(unsigned int n, long double x); double laguerre(unsigned int n, IntegralType x); (2)(since C++ 17) 1) Computes the non-associated Laguerre_polynomials…
std::kill_dependency – std::kill_dependency Synopsis Defined in header <atomic> template< class T > (since C++11) T kill_dependency( T y ) noexcept; Informs the compiler that the dependency tree started by an std::memory_order_consume atomic load operation does not extend past the return value of std::kill_dependency; that is, the argument does not carry a dependency into the return…
std::jmp_buf – std::jmp_buf Synopsis Defined in header <csetjmp> typedef /* unspecified */ jmp_buf; The std::jmp_buf type is an array type suitable for storing information to restore a calling environment. The stored information is sufficient to restore execution at the correct block of the program and invocation of that block. The state of floating-point status flags,…
std::iterator_traits – std::iterator_traits Synopsis Defined in header<iterator> template <class Iter> struct iterator_traits; template <class T> struct iterator_traits<T *>; template <class T> (until C++ 20) struct iterator_traits<const T *>; std::iterator_traits is the type trait class that provides uniform interface to the properties of LegacyIterator types. This makes it possible to implement algorithms only in terms of…
std::iterator – std::iterator Synopsis Defined in header<iterator> template < class Category, class T, class Distance = std::ptrdiff_t, (deprecated in C++ 17) class Pointer = T *, class Reference = T & > struct iterator; std::iterator is the base class provided to simplify definitions of the required types for iterators. Template parameters Category – the category…
std::iter_value_t,std::iter_reference_t,std::iter_difference_t,std::iter_rvalue_reference_t,std::iter_common_reference_t – std::iter_value_t,std::iter_reference_t,std::iter_difference_t,std::iter_rvalue_reference_t,std::iter_common_reference_t Synopsis Defined in header <iterator> template< class T > concept /*dereferenceable*/ = /* see below */; // exposition only template< class T > (1) (since C++20) using iter_value_t = /* see below */; template< /*dereferenceable*/ T > (2) (since C++20) using iter_reference_t = decltype(*std::declval<T&>()); template< class T > (3) (since C++20) using…
std::iter_value_t,std::iter_reference_t,std::iter_difference_t, – std::iter_value_t,std::iter_reference_t,std::iter_difference_t, Synopsis Defined in header <iterator> template< class T > concept /*dereferenceable*/ = /* see below */; // exposition only template< class T > (1) (since using iter_value_t = /* see below */; C++20) template< /*dereferenceable*/ T > (2) (since using iter_reference_t = decltype(*std::declval<T&>()); C++20) template< class T > (3) (since using iter_difference_t…
std::iter_swap – std::iter_swap Synopsis Defined in header<algorithm> template <class ForwardIt1, class ForwardIt2> (until C++ 20) void iter_swap(ForwardIt1 a, ForwardIt2 b); template <class ForwardIt1, class ForwardIt2> (since C++ 20) constexpr void iter_swap(ForwardIt1 a, ForwardIt2 b); Swaps the values of the elements the given iterators are pointing to. Parameters a, b – iterators to the elements to…
std::isxdigit – std::isxdigit Synopsis Defined in header<cctype> int isxdigit(int ch); Checks if the given character is a hexadecimal numeric character (0123456789abcdefABCDEF). The behavior is undefined if the value of ch is not representable as unsigned char and is not equal to EOF. Parameters ch – character to classify Return value Non-zero value if the character…
std::isxdigit(std::locale) – std::isxdigit(std::locale) Synopsis Defined in header<locale> template <class charT> bool isxdigit(charT ch, const locale &loc); Checks if the given character is classified as a hexadecimal digit by the given locale’s std::ctype facet. Parameters ch – character loc – locale Return value Returns true if the character is classified as a hexadecimal digit, false otherwise….
std::iswxdigit – std::iswxdigit Synopsis Defined in header<cwctype> int iswxdigit(wint_t ch); Checks if the given wide character corresponds (if narrowed) to a hexadecimal numeric character, i.e. one of 0123456789abcdefABCDEF. If the value of ch is neither representable as a wchar_t nor equal to the value of the macro WEOF, the behavior is undefined. Parameters ch –…
std::iswupper – std::iswupper Synopsis Defined in header<cwctype> int iswupper(std::wint_t ch); Checks if the given wide character is an uppercase letter, i.e. one of ABCDEFGHIJKLMNOPQRSTUVWXYZ or any uppercase letter specific to the current locale. If the value of ch is neither representable as a wchar_t nor equal to the value of the macro WEOF, the behavior…
std::iswspace – std::iswspace Synopsis Defined in header<cwctype> int iswspace(wint_t ch); Checks if the given wide character is a wide whitespace character as classified by the currently installed C locale. In the default locale, the whitespace characters are the following: * space (0x20, ‘ ‘) * form feed (0x0c, ‘\f’) * line feed (0x0a, ‘\n’) *…
std::iswpunct – std::iswpunct Synopsis Defined in header<cwctype> int iswpunct(std::wint_t ch); Checks if the given wide character is a punctuation character, i.e. it is one of !"#$%&'()*+,-./:;<=>?@[\]^_`{|}~ or any punctuation character specific to the current locale. If the value of ch is neither representable as a wchar_t nor equal to the value of the macro WEOF,…
std::iswprint – std::iswprint Synopsis Defined in header<cwctype> int iswprint(std::wint_t ch); Checks if the given wide character can be printed, i.e. it is either a number (0123456789), an uppercase letter (ABCDEFGHIJKLMNOPQRSTUVWXYZ), a lowercase letter (abcdefghijklmnopqrstuvwxyz), a punctuation character(!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~), space or any printable character specific to the current C locale. If the value of ch is neither…
std::iswlower – std::iswlower Synopsis Defined in header<cwctype> int iswlower(std::wint_t ch); Checks if the given wide character is a lowercase letter, i.e. one of abcdefghijklmnopqrstuvwxyz or any lowercase letter specific to the current locale. If the value of ch is neither representable as a wchar_t nor equal to the value of the macro WEOF, the behavior…
std::iswgraph – std::iswgraph Synopsis Defined in header<cwctype> int iswgraph(std::wint_t ch); Checks if the given wide character has a graphical representation, i.e. it is either a number (0123456789), an uppercase letter (ABCDEFGHIJKLMNOPQRSTUVWXYZ), a lowercase letter (abcdefghijklmnopqrstuvwxyz), a punctuation character(!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~) or any graphical character specific to the current C locale. If the value of ch is neither…
std::iswdigit – std::iswdigit Synopsis Defined in header<cwctype> int iswdigit(wint_t ch); Checks if the given wide character corresponds (if narrowed) to one of the ten decimal digit characters 0123456789. If the value of ch is neither representable as a wchar_t nor equal to the value of the macro WEOF, the behavior is undefined. Parameters ch –…
std::iswctype – std::iswctype Synopsis Defined in header<cwctype> int iswctype(std::wint_t wc, std::wctype_t desc); Classifies the wide character wc using the current C locale’s LC_CTYPE category identified by desc. If the value of wc is neither representable as a wchar_t nor equal to the value of the macro WEOF, the behavior is undefined. Parameters wc – the…