https://stackoverflow.com › questions › 11761703
c - Overloading Macro on Number of Arguments - Stack OverflowARGS_COUNT is used to determine the number of the arguments it takes. And there are several macro for creating a custom overload. For example: template <typename... Args> std::string default_printer(Args&&... args) { return "default"; } #define PRINT_1_arg(a) ("print one argument. " #a ": " + std::to_string(a)) #define PRINT_2_args(a ...
https://stackoverflow.com › questions › 16683146
Can macros be overloaded by number of arguments?Because the ## operator suppresses macro expansion of its arguments, it's better to wrap it in another macro. #define CAT( A, B ) A ## B #define SELECT( NAME, NUM ) CAT( NAME ## _, NUM ) To count arguments, use __VA_ARGS__ to shift arguments like so (this is the clever part):
https://codecraft.co › 2014 › 11 › 25 › variadic-macros-tricks
Variadic macros tricks - CodecraftHave you ever wanted to write a “for each” loop over all the args of a variadic macro? Or have you ever wanted to overload a macro on the number of arguments? (If you’re saying to yourself, “good grief, why?” — I’ll describe a use case at the bottom of this post.)
https://prograide.com › pregunta › 18164 › surcharge-de-la-macro-sur-le-nombre-darguments
[Résolu] c | Surcharge de la macro sur le nombre d'argumentsL'auteur a ajouté le support des arguments par défaut pour les fonctions C via des macros. Je vais essayer de résumer brièvement l'article. En gros, vous devez définir une macro qui peut compter les arguments. Cette macro renverra 2, 1, 0, ou tout autre intervalle d'arguments qu'elle peut supporter. Par exemple :
https://github.com › Jorengarenar › CMObALL
Jorengarenar/CMObALL: C macro overloading - GitHubSingle header providing one macro allowing overloading of other macros based on number of passed arguments. May be used for providing default argument values for functions. Usage. Choose prefix for overloading (may be the same as macro), then define: #define macro (...) CMOBALL(prefix, __VA_ARGS__)
https://dev.to › 0xog_pg › function-overloading-in-c-7nj
Function overloading in C - DEV CommunityIn C, varargs refers to a feature that allows functions to accept a variable number of arguments. This is achieved through the use of the stdarg.h header file, which defines a set of macros for accessing the arguments passed to a function. A function that uses varargs must include an ellipsis (...) as the last parameter in its parameter list ...
https://gcc.gnu.org › ... › macros-with-a-variable-number-of-arguments.html
Macros with a Variable Number of Arguments. - Using the GNU Compiler ...Macros with a Variable Number of Arguments. In the ISO C standard of 1999, a macro can be declared to accept a variable number of arguments much as a function can. The syntax for defining the macro is similar to that of a function. Here is an example: #define debug(format, ...) fprintf (stderr, format, __VA_ARGS__) Here ... is a variable argument.
https://data-flair.training › blogs › macros-with-arguments-in-c
Macros with Arguments in C - DataFlairVariable Length Macro Arguments. C99 introduced support for variable length arguments in macros, similar to variadic functions. This allows macros to accept a variable number of arguments. To define a variadic macro, the last parameter is specified as an ellipsis (…) like: #define LOG(...) printf(__VA_ARGS__)
https://renenyffenegger.ch › ... › preprocessor › macros › __VA_ARGS__ › count-arguments
Preprocessor: __VA_ARGS__ : count arguments - René NyffeneggerThus, the macro DEBUG_VARIABLE_ARGUMENTS can be used to call printf via a macro and a varying number of arguments: #include "debug-variable-arguments.h" int main() { DEBUG_VARIABLE_ARGUMENTS("hello, world\n"); DEBUG_VARIABLE_ARGUMENTS("The number is: %d\n", 42); DEBUG_VARIABLE_ARGUMENTS("%d %s\n", 99, "Bottles"); DEBUG_VARIABLE_ARGUMENTS("%s ...
https://www.gnu.org › software › c-intro-and-ref › manual › html_node › Macro-Arguments.html
Macro Arguments (GNU C Language Manual)passes two arguments to macro: array[x = y and x + 1].If you want to supply array[x = y, x + 1] as an argument, you can write it as array[(x = y, x + 1)], which is equivalent C code.However, putting an assignment inside an array subscript is to be avoided anyway. All arguments to a macro are completely macro-expanded before they are substituted into the macro body. After substitution, the ...
