1#define f1(i) ((i)*(i))
2#define I2(f, n) f(n) + f(n+1)
3#define I3(f, n) I2(f, n) + f(n+2)
4
5#define FL_f1(i) ((i)*(i))
6#define FL_I2(f, n) f(n) + f(n+0.2)
7#define FL_I3(f, n) FL_I2(f, n) + f(n+0.5)
8
9void main()
10{
11    int f1 = 4;
12    int f2 = f1;
13    int f3 = f1(3);
14    int f4 = I2(f1, 0);
15    int f5 = I3(f1, 0);
16
17    highp float fl_f5 = FL_I3(FL_f1, 0.1);
18}
19
20// f5 = I3(f1, 0)
21//    = I2(f1, 0) + f1(0 + 2)
22//    = f1(0) + f1(0+1) + f1(0+2)
23//    = 0*0 + 1*1 + 2*2
24//    = 5
25
26// fl_f5 = FL_I3(FL_f1, 0.1)
27//       = FL_I2(FL_f1, 0.1) + FL_f1(0.1 + 0.5)
28//       = FL_f1(0.1) + FL_f1(0.1 + 0.2) + FL_f1(0.1 + 0.5)
29//       = 0.1*0.1 + 0.3*0.3 + 0.6*0.6
30//       = 0.46
31