Usage namespace declaration namespace alias definition using-directives

Defined in header <cstdlib> int mblen( const char* s, std::size_t n ); Determines the size, in bytes, of the multibyte character whose first byte is pointed to by s. If s is a null pointer, resets the global conversion state and determined whether shift sequences are used. This function is equivalent to the call std::mbtowc((wchar_t*)0, s, n), except that conversion state of std::mbtowc is unaffected. Notes Each call to mblen updates the internal global conversion state

Introduces implementation-defined attributes for types, objects, code, etc. [[ attr]] [[attr1, attr2, attr3(args)]] [[namespace::attr(args)]] alignas_specifier Explanation Attributes provide the unified standard syntax for implementation-defined language extensions, such as the GNU and IBM language extensions __attribute__((...)), Microsoft extension __declspec(), etc. An attribute can be used almost everywhere in the C++ program, and can be applied to almost everything: to types, to v

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

Specifies that a type is a literal type. Literal types are the types of constexpr variables and they can be constructed, manipulated, and returned from constexpr functions. Note, that the standard doesn't define a named requirement or concept with this name. This is a type category defined by the core language. It is included here as concept only for consistency. Requirements A literal type is any of the following: possibly cv-qualified (since C++17) void (so that constexpr functions can r

Functions Defined in header <cstdlib> malloc allocates memory (function) calloc allocates and zeroes memory (function) realloc expands previously allocated memory block (function) free deallocates previously allocated memory (function) See also C documentation for C memory management library

This header was originally in the C standard library as <stdbool.h>. Compatibility header, in C defines true, false and bool which are keywords in C++. __bool_true_false_are_defined (C++11) C compatibility macro constant, expands to integer constant 1 (macro constant)

Defined in header <cstdio> void setbuf( std::FILE* stream, char* buffer ); Sets the internal buffer to use for I/O operations performed on the C stream stream. If buffer is not null, equivalent to std::setvbuf(stream, buffer, _IOFBF, BUFSIZ). If buffer is null, equivalent to std::setvbuf(stream, NULL, _IONBF, 0), which turns off buffering. Parameters stream - the file stream to set the buffer to. buffer - pointer to a buffer for the stream to use. If NULL is s

Defined in header <codecvt> template< class Elem, unsigned long Maxcode = 0x10ffff, std::codecvt_mode Mode = (std::codecvt_mode)0 > class codecvt_utf8_utf16 : public std::codecvt<Elem, char, std::mbstate_t>; std::codecvt_utf8_utf16 is a std::codecvt facet which encapsulates conversion between a UTF-8 encoded byte string and UTF-16 encoded character string. If Elem is a 32-bit type, one UTF-16 codepoint will be stored in each 32-bit character

Usage static storage duration with external linkage specifier language linkage specification explicit template instantiation declaration (or "extern template")