The C Preprocessor
In C and C++, the language supports a simple macro preprocessor. Source lines that should be handled by the preprocessor, such as #define
and #include
are referred to as preprocessor directives.
Another C construct, the #pragma
directive, is used to instruct the compiler to use pragmatic or implementation-dependent features. Two notable users of this directive are OpenMP and OpenACC.
Syntactic constructs similar to C's preprocessor directives, such as C#'s #if
, are also typically called "directives", although in these cases there may not be any real preprocessing phase involved.
Read more about this topic: Directive (programming)
Famous quotes containing the words the c:
“Let the others have the charisma. Ive got the class.”
—George Bush (b. 1924)