core:

import edu.neu.ccs.demeter.*;
add: class PrintVisitor extends UniversalVisitor {
  protected int indent;
  public int get_indent() {{ return indent; }}
  public void set_indent(int new_indent)
    {{ indent = new_indent; }}
  protected boolean needSpace;
  public boolean get_needSpace() {{ return needSpace; }}
  public void set_needSpace(boolean new_needSpace)
    {{ needSpace = new_needSpace; }}
  public constructor PrintVisitor() {{ super(); }}
  public constructor PrintVisitor(int indent, boolean needSpace) {{
    super();
    set_indent(indent);
    set_needSpace(needSpace);
  }}
{{
    protected java.io.PrintWriter out = new java.io.PrintWriter(System.out, true);
    java.io.PrintWriter get_out()             { return out; }
    void set_out(java.io.PrintWriter new_out) { out = new_out; }
    PrintVisitor(java.io.PrintWriter out)     { set_out(out); }
    PrintVisitor(java.io.PrintStream out)
      { set_out(new java.io.PrintWriter(out, true)); }
  }}
  public void finish() {{ out.flush(); }}
  protected void space() {{
    if (needSpace) out.print(" ");
    needSpace = false;
  }}
  public void before_aspectname(TraversalAspect source, AspectName dest) {{
    space();
    out.print("aspect");
    needSpace = true;
  }}
  public void before_definitionbody(Definition source, DefinitionBody dest) {{
    space();
    out.print("declare");
    needSpace = true;
  }}
  public void after_definitionbody(Definition source, DefinitionBody dest) {{
    out.print(";");
    needSpace = false;
  }}
  public void before_classgraphname(CG source, ClassGraphName dest) {{
    space();
    out.print("ClassGraph");
    needSpace = true;
  }}
  public void before_strategyname(Strategy source, StrategyName dest) {{
    space();
    out.print("Strategy");
    needSpace = true;
  }}
  public void before_strategyexpression(Strategy source, StrategyExpression dest) {{
    out.print("=");
    needSpace = false;
  }}
  public void before_string(StrategyString source, String dest) {{
    space();
    out.print("\"" + source.get_string() + "\"");
    needSpace = true;
  }}
  public void before_op(Compound source, Op dest) {{
    out.print("(");
    needSpace = false;
  }}
  public void after_strategyexpression_list(Compound source, StrategyExpression_List dest) {{
    out.print(")");
    needSpace = false;
  }}
  public void before(And host) {{
    out.print("&&");
    needSpace = false;
  }}
  public void before_methodsignature(AdaptiveMethod source, MethodSignature dest) {{
    space();
    out.print("Method");
    needSpace = true;
  }}
  public void after_name(MethodSignature source, MethodName dest) {{
    out.print("(");
    needSpace = false;
  }}
  public void before_throwsclause(MethodSignature source, Throws dest) {{
    out.print(")");
    needSpace = false;
  }}
  public void before(PublicMethod host) {{
    space();
    out.print("public");
    needSpace = true;
  }}
  public void before(ProtectedMethod host) {{
    space();
    out.print("protected");
    needSpace = true;
  }}
  public void before(PrivateMethod host) {{
    space();
    out.print("private");
    needSpace = true;
  }}
  public void before(StaticMethod host) {{
    space();
    out.print("static");
    needSpace = true;
  }}
  public void before(FinalMethod host) {{
    space();
    out.print("final");
    needSpace = true;
  }}
  public void before_exceptions(Throws source, ClassName_Commalist dest) {{
    out.print(" ");
    needSpace = false;
    space();
    out.print("throws");
    needSpace = true;
  }}
  public void before_visitorClasses(VisitorRef source, ClassName_Commalist dest) {{
    out.print("(");
    needSpace = false;
  }}
  public void after_visitorClasses(VisitorRef source, ClassName_Commalist dest) {{
    out.print(")");
    needSpace = false;
  }}
  public void before(ArraySpec host) {{
    out.print("[");
    needSpace = false;
    out.print("]");
    needSpace = false;
  }}
  public void before_ident(ClassGraphName source, Ident dest) {{
    space();
    out.print(source.get_ident());
    needSpace = true;
  }}
  public void before_ident(StrategyName source, Ident dest) {{
    space();
    out.print(source.get_ident());
    needSpace = true;
  }}
  public void before_ident(MethodName source, Ident dest) {{
    space();
    out.print(source.get_ident());
    needSpace = true;
  }}
  public void before_name(ParmName source, Ident dest) {{
    space();
    out.print(source.get_name());
    needSpace = true;
  }}
  public void before_s(Main source, String dest) {{
    space();
    out.print("\"" + source.get_s() + "\"");
    needSpace = true;
  }}
  public void before_indent(PrintVisitor source, int dest) {{
    space();
    out.print(source.get_indent());
    needSpace = true;
  }}
  public void before_needSpace(PrintVisitor source, boolean dest) {{
    space();
    out.print(source.get_needSpace());
    needSpace = true;
  }}
  public void before_copy(CopyVisitor source, Object dest) {{
    space();
    out.print(source.get_copy());
    needSpace = true;
  }}
  public void before_is_equal(SubgraphVisitor source, boolean dest) {{
    space();
    out.print(source.get_is_equal());
    needSpace = true;
  }}
  public void before_is_equal(EqualVisitor source, boolean dest) {{
    space();
    out.print(source.get_is_equal());
    needSpace = true;
  }}
  public void before_indent(DisplayVisitor source, int dest) {{
    space();
    out.print(source.get_indent());
    needSpace = true;
  }}
  public void before_indent(TraceVisitor source, int dest) {{
    space();
    out.print(source.get_indent());
    needSpace = true;
  }}
  public void before_first(Definition_CurlyList source, Nonempty_Definition_CurlyList dest) {{
    out.print("{");
    needSpace = false;
  }}
  public void after_first(Definition_CurlyList source, Nonempty_Definition_CurlyList dest) {{
    out.print("}");
    needSpace = false;
  }}
  public void before_it(Nonempty_Name source, Ident dest) {{
    space();
    out.print(source.get_it());
    needSpace = true;
  }}
  public void before_next(Nonempty_Name source, Nonempty_Name dest) {{
    out.print(".");
    needSpace = false;
  }}
  public void before_next(Nonempty_TraversalAspect_List source, Nonempty_TraversalAspect_List dest) {{
    out.print(" ");
    needSpace = false;
  }}
  public void before_next(Nonempty_Definition_CurlyList source, Nonempty_Definition_CurlyList dest) {{
    out.print(" ");
    needSpace = false;
  }}
  public void before_next(Nonempty_StrategyExpression_List source, Nonempty_StrategyExpression_List dest) {{
    out.print(" ");
    needSpace = false;
  }}
  public void before_next(Nonempty_MethodKeyword_List source, Nonempty_MethodKeyword_List dest) {{
    out.print(" ");
    needSpace = false;
  }}
  public void before_next(Nonempty_MethodParm_Commalist source, Nonempty_MethodParm_Commalist dest) {{
    out.print(",");
    needSpace = false;
    out.print(" ");
    needSpace = false;
  }}
  public void before_next(Nonempty_ArraySpec_List source, Nonempty_ArraySpec_List dest) {{
    out.print(" ");
    needSpace = false;
  }}
  public void before_next(Nonempty_ClassName_Commalist source, Nonempty_ClassName_Commalist dest) {{
    out.print(",");
    needSpace = false;
    out.print(" ");
    needSpace = false;
  }}
{{  void universal_trv0_bef(UniversalVisitor _v_) {
    super.universal_trv0_bef(_v_);
  }
}}
{{  void universal_trv0_aft(UniversalVisitor _v_) {
    super.universal_trv0_aft(_v_);
  }
}}
{{  void universal_trv0(UniversalVisitor _v_) {
    universal_trv0_bef(_v_);
    super.universal_trv0(_v_);
    universal_trv0_aft(_v_);
  }
}}
}