PrintVisitor.java

// Name:PrintVisitor.java
// Author: David Sinclair      Date: 29 Aug 2012
//
// Visitor for "pretty printing" an abstract syntax tree in the ExprLang language
//

public class PrintVisitor implements ParserVisitor
{
    public Object visit(SimpleNode node, Object data)
    {
        throw new RuntimeException("Visit SimpleNode");
    }

    public Object visit(ASTProgram node, Object data)
    {
        node.jjtGetChild(0).jjtAccept(this, data);
        System.out.println(";");
        return(data);
    }

    public Object visit(ASTVarDecl node, Object data)
    {
        System.out.print(node.value + " ");
        System.out.println("TEST");
        node.jjtGetChild(0).jjtAccept(this, data);
        return data;
    }

    public Object visit(ASTConstDecl node, Object data)
    {
        System.out.print(node.value + " ");
        node.jjtGetChild(0).jjtAccept(this, data);
        return data;
    }

    public Object visit(ASTEqual node, Object data)
    {
        System.out.print(node.value + " ");
        node.jjtGetChild(0).jjtAccept(this, data);
        return data;
    }

    public Object visit(ASTFunction node, Object data)
    {
        System.out.print(node.value + " ");
        node.jjtGetChild(0).jjtAccept(this, data);
        return data;
    }

    public Object visit(ASTParamList node, Object data)
    {
        System.out.print(node.value + " ");
        node.jjtGetChild(0).jjtAccept(this, data);
        return data;
    }
    public Object visit(ASTType node, Object data)
    {
        System.out.print(node.value + " ");
        node.jjtGetChild(0).jjtAccept(this, data);
        return data;
    }

    public Object visit(ASTMainProg node, Object data)
    {
        System.out.print(node.value + " ");
        node.jjtGetChild(0).jjtAccept(this, data);
        return data;
    }

    public Object visit(ASTAssign node, Object data)
    {
        System.out.print(node.value + " ");
        node.jjtGetChild(0).jjtAccept(this, data);
        return data;
    }

    public Object visit(ASTMathSign node, Object data)
    {
        System.out.print(node.value + " ");
        node.jjtGetChild(0).jjtAccept(this, data);
        return data;
    }

    public Object visit(ASTCondition node, Object data)
    {
        System.out.print(node.value + " ");
        node.jjtGetChild(0).jjtAccept(this, data);
        return data;
    }

    public Object visit(ASTSigns node, Object data)
    {
        System.out.print(node.value + " ");
        node.jjtGetChild(0).jjtAccept(this, data);
        return data;
    }

    public Object visit(ASTIdentList node, Object data)
    {
        System.out.print(node.value + " ");
        node.jjtGetChild(0).jjtAccept(this, data);
        return data;
    }

    public Object visit(ASTArgList node, Object data)
    {
        System.out.print(node.value + " ");
        node.jjtGetChild(0).jjtAccept(this, data);
        return data;
    }

    public Object visit(ASTNum node, Object data)
    {
        System.out.print(node.value);
        return data;
    }

    public Object visit(ASTBool node, Object data)
    {
        node.jjtGetChild(0).jjtAccept(this, data);
        System.out.print(" " + node.value + " ");
        node.jjtGetChild(1).jjtAccept(this, data);
        return data;
    }

    public Object visit(ASTId node, Object data)
    {
        System.out.print(node.value);
        return data;
    }

}