Standard library header <cstdarg>

 

C++

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Technical Specifications

 

Standard Library header files

Language Support
<cstddef> <limits> <climits> <cfloat> <cstdint> <new> <typeinfo> <exception> <ciso646>	<exception_list> <initializer_list> <csignal> <csetjmp> <cstdalign> <cstdarg> <cstdbool> <ctime>
Diagnostics
<stdexcept> <cassert>	<cerrno> <system_error>
General utilities
<utility> <tuple> <optional> <any> <memory> <memory_resource> <scoped_allocator> <cstdlib>	<bitset> <functional> <type_traits> <ratio> <chrono> <ctime> <typeindex>
Strings
<string> <cctype> <cwctype> <cstring>	<string_view> <cwchar> <cuchar>
Localization
<locale> <codecvt> <clocale>

Containers
<array> <deque> <forward_list> <list> <vector>	<map> <set> <unordered_map> <unordered_set> <queue> <stack>
Iterators
<iterator>
Algorithms
<algorithm>	<execution_policy>
Numerics
<cfenv> <complex> <random> <valarray>	<numeric> <cmath> <ctgmath>
Input/Output
<iosfwd> <iostream> <ios> <streambuf> <istream> <ostream>	<iomanip> <sstream> <fstream> <filesystem> <cstdio> <cinttypes>
Regular expressions
<regex>
Thread support
<thread> <mutex> <atomic>	<shared_mutex> <condition_variable> <future>

 

This header was originally in the C standard library as <stdarg.h>.

This header provides support for C-style variadic functions.

Types
va_list	holds the information needed by va_start, va_arg, va_end, and va_copy (typedef)
Macros
va_start	enables access to variadic function arguments (function macro)
va_arg	accesses the next variadic function argument (function macro)
va_copy (C++11)	makes a copy of the variadic function arguments (function macro)
va_end	ends traversal of the variadic function arguments (function macro)

Synopsis

namespace std {
  using va_list = /* implementation-defined */ ;
}
 
#define va_arg(V, P) /* implementation-defined */
#define va_copy(VDST, VSRC) /* implementation-defined */
#define va_end(V) /* implementation-defined */
#define va_start(V, P) /* implementation-defined */