// We need to use prescan for these function
// See cpp prescan feature for more informations
#define _STRINGIFY(X)        #X
#define STRINGIFY(X)         _STRINGIFY(X)
#define _CONCAT2(X, Y)       X ## Y
#define CONCAT2(X, Y)        _CONCAT2(X, Y)
#define _CONCAT3(X, Y, Z)    X ## Y ## Z
#define CONCAT3(X, Y, Z)     _CONCAT3(X, Y, Z) 
#define _CONCAT4(W, X, Y, Z) W ## X ## Y ## Z
#define CONCAT4(W, X, Y, Z)  _CONCAT4(W, X, Y, Z) 


#define _VAR1_ var1
#define _VAR2_ var2
#define _VAR3_ var3
#define _VAR4_ var4
#define RESULT CONCAT3(text, _VAR1_, _VAR2_)

RESULT
STRINGIFY(_VAR1_)
STRINGIFY(const)
CONCAT2(_VAR1_, _VAR2_)
CONCAT3(_VAR1_, _VAR2_, _VAR3_)
CONCAT4(_VAR1_, _VAR2_, _VAR3_, _VAR4_)
CONCAT4(_VAR1_, const, _VAR3_, const)