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A variadic macro is a feature of some computer programming languages, especially the C preprocessor, whereby a macro may be declared to accept a varying number of arguments. Variable-argument macros were introduced in 1999 in the ISO/IEC 9899:1999 ( C99 ) revision of the C language standard, and in 2011 in ISO/IEC 14882:2011 ( C++11 ) revision ...
Many compilers define additional, non-standard macros. A common reference for these macros is the Pre-defined C/C++ Compiler Macros project, which lists "various pre-defined compiler macros that can be used to identify standards, compilers, operating systems, hardware architectures, and even basic run-time libraries at compile-time."
Add __has_c_attribute allowing the availability of an attribute to be checked by preprocessor directives. [21] (see "C++ compatibility" group for new attribute feature) Add __VA_OPT__ functional macro for variadic macros which expands to its argument only if a variadic argument has been passed to the containing macro. [22]
C99 provides an additional macro, va_copy, which can duplicate the state of a va_list. The macro invocation va_copy(va2, va1) copies va1 into va2. There is no defined method for counting or classifying the unnamed arguments passed to the variadic function. The function should simply determine this somehow, the means of which vary.
Variadic function; Variadic macro in the C preprocessor; Variadic template This page was last edited on 15 September 2024, at 00:44 (UTC). Text is ...
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(Reuters) - U.S. new vehicle retail sales are expected to rise 8.1% to 1.01 million units in February on an adjusted basis, industry consultants J.D. Power and GlobalData said in a joint report on ...
Translation units define a scope, roughly file scope, and functioning similarly to module scope; in C terminology this is referred to as internal linkage, which is one of the two forms of linkage in C. Names (functions and variables) declared outside of a function block may be visible either only within a given translation unit, in which case they are said to have internal linkage – they are ...