exprnode.java

一个JAVA编写的简单编译器

package ast.statement;

public class ExprNode extends StatementNode {
  private ast.IJSubNode expr = null;
  public ExprNode (ast.IJSubNode expr) {
    this.expr = expr;
  }
  public String toString (String prefix) {
    return prefix + "expr";
  }
  public void dump(String prefix) {
    System.out.println(toString(prefix));
    if (expr != null)
      expr.dump (prefix + "  ");
  }
  public void codegen () {
    if (expr != null)
      expr.codegen ();
  }  
  public int getDepth () {
    if (expr == null)
      return 0;
    else
      return expr.getDepth ();
  }
  public String getXMLType () {
    return "expr";
  }
  public void genXML (java.io.PrintStream p, String prefix) {
   p.println (prefix + "<expr>");
   if (expr != null)
      expr.genXML (p, prefix);
   p.println (prefix + "</expr>");
  }   
}