callnode.java

一个JAVA编写的简单编译器

package ast.binaryExpr;
// children [0] : 1. Parameter 
// children [1] : 2. Parameter 


public class CallNode extends ast.JSubNode {
  private ast.declaration.StaticMethod calledmethod;
  
  public CallNode (ast.declaration.JSubObject calledmethod) {
    this.calledmethod = (ast.declaration.StaticMethod)calledmethod;
  }
  
  public String toString () {
    return "()";
  }    
  
  public void codegen () {
    int k = getNumChildren ();
    for (int i = 0; i < k; i++) {
      ast.IJSubNode nextvalue = (ast.IJSubNode)getChild (i);
      nextvalue.codegen ();
    }      
    codegen.WriteCode.genstaticCall (
      calledmethod.getMethodName(), 
      calledmethod.getSignature(), 
      calledmethod.getType());
  }  
  
  public int getDepth () {
    int depth = 0;
    for (int i = 0; i < children.size(); i++) {
      ast.IJSubNode node = (ast.IJSubNode)children.elementAt(i);
      int ndepth = node.getDepth() + i + 1;
      if (depth < ndepth)
        depth = ndepth;
    }
    return depth;
  }

  public void dump (String prefix) {
    System.out.println (prefix + calledmethod.toString());
    super.dump (prefix + "  ");
  }
  
  public String getXMLType () {
    return "call"; 
  }
  
  public void genXML (java.io.PrintStream p, String prefix) {
    p.println (prefix + "<" + getXMLType () + ">");
    p.println (prefix + "<calledmethod name = \"" + calledmethod.getName () +"\">");
    p.println (prefix + "</calledmethod>");
    p.println (prefix + "<parameters>");
    for (int i = 0; i < children.size(); i++) {
      ast.IJSubNode n = (ast.IJSubNode)children.elementAt(i);
      n.genXML (p, prefix + "  ");
    }
    p.println (prefix + "</parameters>");
    p.println (prefix + "</" + getXMLType () + ">");
  }  
    
}