Section 3: library functions
std::iswcntrl – std::iswcntrl Synopsis Defined in header<cwctype> int iswcntrl(std::wint_t ch); Checks if the given wide character is a control character, i.e. codes 0x00-0x1F and 0x7F and any control characters 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…
std::iswblank – std::iswblank Synopsis Defined in header <cwctype> int iswblank( std::wint_t ch ); (since C++11) Checks if the given wide character is classified as blank character (that is, a whitespace character used to separate words in a sentence) by the current C locale. In the default C locale, only space (0x20) and horizontal tab (0x09)…
std::iswalpha – std::iswalpha Synopsis Defined in header<cwctype> int iswalpha(std::wint_t ch); Checks if the given wide character is an alphabetic character, i.e. either an uppercase letter (ABCDEFGHIJKLMNOPQRSTUVWXYZ), a lowercase letter (abcdefghijklmnopqrstuvwxyz) or any alphabetic character specific to the current locale. If the value of ch is neither representable as a wchar_t nor equal to the value…
std::iswalnum – std::iswalnum Synopsis Defined in header<cwctype> int iswalnum(std::wint_t ch); Checks if the given wide character is an alphanumeric character, i.e. either a number (0123456789), an uppercase letter (ABCDEFGHIJKLMNOPQRSTUVWXYZ), a lowercase letter (abcdefghijklmnopqrstuvwxyz) or any alphanumeric character specific to the current locale. If the value of ch is neither representable as a wchar_t nor equal…
std::isupper – std::isupper Synopsis Defined in header<cctype> int isupper(int ch); Checks if the given character is an uppercase character as classified by the currently installed C locale. In the default "C" locale, isupper returns a nonzero value only for the uppercase letters (ABCDEFGHIJKLMNOPQRSTUVWXYZ). If isupper returns a nonzero value, it is guaranteed that iscntrl, isdigit,…
std::isupper(std::locale) – std::isupper(std::locale) Synopsis Defined in header<locale> template <class charT> bool isupper(charT ch, const locale &loc); Checks if the given character is classified as an uppercase alphabetic character by the given locale’s std::ctype facet. Parameters ch – character loc – locale Return value Returns true if the character is classified as uppercase, false otherwise. Possible…
std::isunordered – std::isunordered Synopsis Defined in header <cmath> bool isunordered( float x, float y ); (1) (since C++11) bool isunordered( double x, double y ); (2) (since C++11) bool isunordered( long double x, long double y ); (3) (since C++11) bool isunordered( Arithmetic x, Arithmetic y ); (4) (since C++11) 1-3) Determines if the floating…
std::istrstream::str – std::istrstream::str Synopsis char *str(); Returns the pointer to the beginning of the buffer, after freezing it. Effectively calls rdbuf()->str() Parameters (none) Return value Pointer to the beginning of the buffer in the associated std::strsteambuf or NULL if no buffer is available. Example This section is incomplete Reason: no example
std::istrstream::rdbuf – std::istrstream::rdbuf Synopsis strstreambuf *rdbuf() const; Returns a pointer to the associated std::strstreambuf, casting away its constness (despite the const qualifier on the member function) Parameters (none) Return value Pointer to the associated std::strsteambuf, with constness cast away. Example // Run this code #include <strstream> int main() { const std::istrstream buf("example"); std::strstreambuf *ptr =…
std::istrstream::~istrstream – std::istrstream::~istrstream Synopsis virtual ~istrstream(); Destroys a std::istrstream object, which also destroys the member std::strstreambuf. Parameters (none) Notes The constructors of std::istrstream do not create the underlying std::strstreambuf in dynamically allocated mode, so the memory leaks that are possible with std::ostrstream::~ostrstream or std::strstream::~strstream do not apply. Example // Run this code #include <strstream> #include…
std::istrstream – std::istrstream Synopsis Defined in header <strstream> class istrstream : public std::istream (deprecated in C++98) The class istrstream implements input operations on array-backed streams. It essentially wraps a raw array I/O device implementation (std::strstreambuf) into the higher-level interface of std::basic_istream. The typical implementation of istrstream holds only one non-derived data member: an object of…
std::basic_istringstream::swap – std::basic_istringstream::swap Synopsis void swap(basic_istringstream &other); (since C++ 11) Exchanges the state of the stream with those of other. This is done by callingbasic_istream<CharT, Traits>::swap(other) and rdbuf()->swap(*other.rdbuf()). Parameters other – stream to exchange the state with Return value (none) Example This section is incomplete Reason: no example See also operator= moves the string stream…
std::basic_istringstream::rdbuf – std::basic_istringstream::rdbuf Synopsis std::basic_stringbuf<CharT, Traits, Allocator> *rdbuf() const; Returns pointer to the underlying raw string device object. Parameters (none) Return value Pointer to the underlying raw string device. Example This section is incomplete Reason: no example
std::basic_istringstream::operator= – std::basic_istringstream::operator= Synopsis basic_istringstream& operator=( basic_istringstream&& other ); (since C++11) Move assigns the string stream other to *this, effectively move-assigning both the std::basic_istream base class and the associated std::basic_stringbuf. Note that the base class move assignment swaps all stream state variables (except for rdbuf) between *this and other. Parameters other – string stream to…
std::basic_istringstream – std::basic_istringstream Synopsis Defined in header <sstream> template< class CharT, (until C++11) class Traits = std::char_traits<CharT> > class basic_istringstream; template< class CharT, class Traits = std::char_traits<CharT>, (since C++11) class Allocator = std::allocator<CharT> > class basic_istringstream; The class template std::basic_istringstream implements input operations on memory (std::basic_string) based streams. It essentially wraps a raw string device…
std::istreambuf_iterator<CharT,Traits>::operator++,operator++(int) – std::istreambuf_iterator<CharT,Traits>::operator++,operator++(int) Synopsis istreambuf_iterator& operator++(); (1) /* proxy */ operator++(int); (2) Advances the iterator by calling sbuf_->sbumpc() where sbuf_ is the stored pointer to the stream buffer. The behavior is undefined if the iterator is end-of-stream iterator. Parameters (none) Return value 1) *this. 2) A proxy object holding the current character obtained via operator*()…
std::istream_iterator<T,CharT,Traits,Distance>::~istream_iterator – std::istream_iterator<T,CharT,Traits,Distance>::~istream_iterator Synopsis ~istream_iterator() = default; 1) Destroys the iterator, including the cached value. If T is a literal type, then this destructor is a trivial destructor (since C++11) (until C++17) If std::is_trivially_destructible_v<T> is true, then this destructor is a trivial destructor. (since C++17)
std::basic_istream – std::basic_istream Synopsis Defined in header <istream> template< class CharT, class Traits = std::char_traits<CharT> > class basic_istream : virtual public std::basic_ios<CharT, Traits> The class template basic_istream provides support for high level input operations on character streams. The supported operations include formatted input (e.g. integer values or whitespace-separated characters and characters strings) and unformatted input…
std::isspace – std::isspace Synopsis Defined in header<cctype> int isspace(int ch); Checks if the given character is 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’) * carriage return (0x0d,…
std::isspace(std::locale) – std::isspace(std::locale) Synopsis Defined in header<locale> template <class charT> bool isspace(charT ch, const locale &loc); Checks if the given character is classified as a whitespace character by the given locale’s ctype facet. Parameters ch – character loc – locale Return value Returns true if the character is classified as a whitespace character, false otherwise….