Section 3: library functions
std::towupper – std::towupper Synopsis Defined in header <cwctype> std::wint_t towupper( std::wint_t ch ); Converts the given wide character to uppercase, if possible. 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 – wide character to be converted Return…
std::towlower – std::towlower Synopsis Defined in header <cwctype> std::wint_t towlower( std::wint_t ch ); Converts the given wide character to lowercase, if possible. 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 – wide character to be converted Return…
std::towctrans – std::towctrans Synopsis Defined in header <cwctype> std::wint_t towctrans( std::wint_t wc, std::wctrans_t desc ); Maps the wide character wc using the current C locale’s LC_CTYPE mapping category identified by desc. 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….
std::toupper – std::toupper Synopsis Defined in header<cctype> int toupper(int ch); Converts the given character to uppercase according to the character conversion rules defined by the currently installed C locale. In the default "C" locale, the following lowercase letters abcdefghijklmnopqrstuvwxyz are replaced with respective uppercase letters ABCDEFGHIJKLMNOPQRSTUVWXYZ. Parameters ch – character to be converted. If the…
std::toupper(std::locale) – std::toupper(std::locale) Synopsis Defined in header<locale> template <class charT> charT toupper(charT ch, const locale &loc); Converts the character ch to uppercase if possible, using the conversion rules specified by the given locale’s std::ctype facet. Parameters ch – character loc – locale Return value Returns the uppercase form of ch if one is listed in…
std::tolower – std::tolower Synopsis Defined in header<cctype> int tolower(int ch); Converts the given character to lowercase according to the character conversion rules defined by the currently installed C locale. In the default "C" locale, the following uppercase letters ABCDEFGHIJKLMNOPQRSTUVWXYZ are replaced with respective lowercase letters abcdefghijklmnopqrstuvwxyz. Parameters ch – character to be converted. If the…
std::tolower(std::locale) – std::tolower(std::locale) Synopsis Defined in header<locale> template <class charT> charT tolower(charT ch, const locale &loc); Converts the character ch to lowercase if possible, using the conversion rules specified by the given locale’s std::ctype facet. Parameters ch – character loc – locale Return value Returns the lowercase form of ch if one is listed in…
std::to_wstring – std::to_wstring Synopsis Defined in header <string> std::wstring to_wstring( int value ); (1) (since C++11) std::wstring to_wstring( long value ); (2) (since C++11) std::wstring to_wstring( long long value ); (3) (since C++11) std::wstring to_wstring( unsigned value ); (4) (since C++11) std::wstring to_wstring( unsigned long value ); (5) (since C++11) std::wstring to_wstring( unsigned long long…
std::to_string – std::to_string Synopsis Defined in header <string> std::string to_string( int value ); (1) (since C++11) std::string to_string( long value ); (2) (since C++11) std::string to_string( long long value ); (3) (since C++11) std::string to_string( unsigned value ); (4) (since C++11) std::string to_string( unsigned long value ); (5) (since C++11) std::string to_string( unsigned long long…
std::to_chars – std::to_chars Synopsis Defined in header<charconv> std::to_chars_result to_chars(char *first, char *last, (1)(since C++ 17) /*see below*/ value, int base = 10); std::to_chars_result to_chars(char *first, char *last, float value); std::to_chars_result to_chars(char *first, char *last, double value); (2)(since C++ 17) std::to_chars_result to_chars(char *first, char *last, long double value); std::to_chars_result to_chars(char *first, char *last, float value, std::chars_format…
std::to_address – std::to_address Synopsis Defined in header<memory> template <class Ptr> (1)(since C++ 20) auto to_address(const Ptr &p) noexcept; template <class T> (2)(since C++ 20) constexpr T *to_address(T *p) noexcept; Obtain the address represented by p without forming a reference to the pointee. 1) Fancy pointer overload: If the expression std::pointer_traits<Ptr>::to_address(p) is well-formed, returns the result…
std::tmpnam – std::tmpnam Synopsis Defined in header<cstdio> char *tmpnam(char *filename); Creates a unique filename that does not name a currently existing file, and stores it in the character string pointed to by filename. The function is capable of generating up to TMP_MAX of unique filenames, but some or all of them may already be in…
std::tmpfile – std::tmpfile Synopsis Defined in header <cstdio> std::FILE* tmpfile(); Creates and opens a temporary file with a unique auto-generated filename. The file is opened as a binary file for update (as by std::fopen with access mode "wb+"). At least TMP_MAX files may be opened during the lifetime of a program (this limit may be…
std::tm – std::tm Synopsis Defined in header<ctime> struct tm; Structure holding a calendar date and time broken down into its components. Member objects seconds after the minute – [0, 61](until C++11) / [0, 60] (since C++11)[note_1] int tm_sec (public member object) minutes after the hour – [0, 59] int tm_min (public member object) hours since…
std::timespec_get – std::timespec_get Synopsis Defined in header <ctime> int timespec_get( std::timespec* ts, int base) (since C++17) #define TIME_UTC /* implementation-defined */ (since C++17) 1) Modifies the std::timespec object pointed to by ts to hold the current calendar time in the time base base. 2) Expands to a value suitable for use as the base argument…
std::timespec – std::timespec Synopsis Defined in header <ctime> struct timespec; (since C++17) Structure holding an interval broken down into seconds and nanoseconds. Member objects std::time_t tv_sec whole seconds – >= 0 long tv_nsec nanoseconds – [0, 999999999] See also timespec_get returns the calendar time based on a given time base (function) (since C++17) calendar time…
std::timed_mutex::unlock – std::timed_mutex::unlock Synopsis void unlock(); (since C++ 11) Unlocks the mutex. The mutex must be locked by the current thread of execution, otherwise, the behavior is undefined. This operation synchronizes-with (as defined in std::memory_order) any subsequent lock operation that obtains ownership of the same mutex. Parameters (none) Return value (none) Exceptions (none) Notes unlock()…
std::timed_mutex::try_lock_until – std::timed_mutex::try_lock_until Synopsis template <class Clock, class Duration> (since C++ 11) bool try_lock_until(const std::chrono::time_point<Clock, Duration> &timeout_time); Tries to lock the mutex. Blocks until specified timeout_time has been reached or the lock is acquired, whichever comes first. On successful lock acquisition returns true, otherwise returns false. If timeout_time has already passed, this function behaves like…
std::timed_mutex::try_lock_for – std::timed_mutex::try_lock_for Synopsis template <class Rep, class Period> (since C++ 11) bool try_lock_for(const std::chrono::duration<Rep, Period> &timeout_duration); Tries to lock the mutex. Blocks until specified timeout_duration has elapsed or the lock is acquired, whichever comes first. On successful lock acquisition returns true, otherwise returns false. If timeout_duration is less or equal timeout_duration.zero(), the function behaves…
std::timed_mutex::try_lock – std::timed_mutex::try_lock Synopsis bool try_lock(); (since C++11) Tries to lock the mutex. Returns immediately. On successful lock acquisition returns true, otherwise returns false. This function is allowed to fail spuriously and return false even if the mutex is not currently locked by any other thread. If try_lock is called by a thread that already…