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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 ...
The C preprocessor (CPP) is a text file processor that is used with C, C++ and other programming tools. The preprocessor provides for file inclusion (often header files), macro expansion, conditional compilation, and line control. Although named in association with C and used with C, the preprocessor capabilities are not inherently tied to the ...
In computer science, an operator or function is variadic if it can take a varying number of arguments; that is, if its arity is not fixed. For specific articles, see: Variadic function; Variadic macro in the C preprocessor; Variadic template
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]
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 ...
The distinguishing features of this style of macro preprocessing included: free-form syntax (not line-based like a typical macro preprocessor designed for assembly-language processing) the high degree of re-expansion (a macro's arguments get expanded twice: once during scanning and once at interpretation time)
This is an accepted version of this page This is the latest accepted revision, reviewed on 17 February 2025. General-purpose programming language "C programming language" redirects here. For the book, see The C Programming Language. Not to be confused with C++ or C#. C Logotype used on the cover of the first edition of The C Programming Language Paradigm Multi-paradigm: imperative (procedural ...
C (programming language) software (2 C, 22 P) Pages in category "C (programming language)" ... Variadic macro in the C preprocessor; Volatile (computer programming) W.