Scripting: Preprocessor Directives – Arma Reforger

Preprocessor directives allow to determine preprocessor behaviour, e.g ignoring blocks of code depending on certain conditions.

For use cases, see e.g Scripting Temporary Feature.

Directive	Description	Example
#define	Define a flag. A flag is either defined or not. ⓘ A flag can be determined outside of the code; see Startup Parameters - scrDefine.	#define MY_FLAG
#ifdef	Open a preprocessor scope that is considered if the provided flag is defined. The scope must be ended by #endif (see below).	#define MY_FLAG #ifdef MY_FLAG Print("Flag is defined"); #endif
#ifndef	Open a preprocessor scope that is considered if the provided flag is not defined. The scope must be ended by #endif (see below).	#define MY_FLAG #ifndef MY_FLAG Print("Flag is not defined"); #endif
#else	Add a preprocessor scope that is of the opposite condition of the current #ifdef/#ifndef. The scope must be ended by #endif (see below).	#ifdef MY_FLAG Print("Flag is defined"); #else Print("Flag is not defined"); #endif
#endif	Close a preprocessor scope - see #ifdef and #ifndef above.	See #ifdef and #ifndef above.
#include	Include another file. The effect is as if the other file's content was copy-pasted at this exact #include location.	// FileToInclude.c protected static const string MY_PRINT = "Hello there"; class SCR_ScriptedClass { #include "scripts/Game/FileToInclude.c" void ShowMessage() { Print(MY_PRINT); } }