modernc.org/cc@v1.0.1/v2/testdata/cpp-expand/example-6.10.3.5-7.h (about)

     1  #define t(x,y,z) x ## y ## z
     2  int j[] = { t(1,2,3), t(,4,5), t(6,,7), t(8,9,),
     3  	t(10,,), t(,11,), t(,,12), t(,,) };