Use parent gen class over implementation class

Joel Grunbaum

2021-07-21 af8179dab78fe661ccf3e212caedcfa8d9d768ba

Use parent gen class over implementation class

 main.cpp

@@ -8,7 +8,7 @@
{
    Document *d;
    parser *p = new tester();
    dot_gen *g = new dot_gen();
    gen *g = new dot_gen();
    g->set_file("temp.dot");
    d = p->parse();
    d->visit(g);