import core.stdc.stdio;

​

// -betterC + C main() are used simplify the final "code-gen" AST

extern (C) int main()

{

    mixin("int x = ", fac(10), ';');

    mixin("int y = ", 2 * 21, ';');

    return x + y;

}

​

int fac(int x) { return x < 2? 1 : x * fac(x - 1); }