scc

simple c99 compiler
git clone git://git.simple-cc.org/scc
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0258-variadic.c (351B)

      1 #define A(x,y) x+y
      2 #define B(x,y, ...) (x+y+ __VA_ARGS__ ## 0)
      3 #define C(x, ...) test(x, __VA_ARGS__)
      4 
      5 int
      6 test(int n1, int n2, int n3, int n4)
      7 {
      8 	return n1 + n2 + n3 + n4;
      9 }
     10 
     11 int
     12 main(void)
     13 {
     14 	int x = 3;
     15 
     16 	if (A(1,x) != 4)
     17 		return 1;
     18 	if (B(1,x) != 4)
     19 		return 2;
     20 	if (B(2,x,3) != 35)
     21 		return 3;
     22 	if (C(1, 2, 3, 4) != 10)
     23 		return 4;
     24 
     25 	return 0;
     26 }