std::va_list

 

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Variadic functions

va_start

va_arg

va_copy (C++11)

va_end

va_list

 

Defined in header <cstdarg>
typedef /* unspecified */ va_list;

va_list is a complete object type (in practice, a unique built-in type or char*) suitable for holding the information needed by the macros va_start, va_copy, va_arg, and va_end.

If a va_list instance is created, passed to another function, and used via va_arg in that function, then any subsequent use in the calling function should be preceded by a call to va_end.

It is legal to pass a pointer to a va_list object to another function and then use that object after the function returns.

See also

va_start	enables access to variadic function arguments (function macro)
va_copy (C++11)	makes a copy of the variadic function arguments (function macro)
va_arg	accesses the next variadic function argument (function macro)
va_end	ends traversal of the variadic function arguments (function macro)