// file:    analyzeRexp.java
// author:  Robert Keller
//
// purpose: Showing how single R expressions can be read, then analyzed
//          using package polya
//
// action:  Repeatedly reads single R expressions and analyzes them
//
// run:     javac analyzeRexp.java; java analyzeRexp

import polya.*;

class analyzeRexp
  {
  static String promptString = "analyze Rexp: "; // default prompt

  public static void main(String arg[])
    {
    Tokenizer in = new Tokenizer(System.in);     // R exp tokenizer

    Object ob;                                   // the object to be analyzed

    while( true )
      {
      System.out.print(promptString);            // prompt for input

      ob = in.nextRexp();                        // read object as R expression

      if( ob == Tokenizer.eof ) break;           // break on end-of-file

      System.out.println(Polylist.analysis(ob)); // show analysis
      }
    System.out.println();                        // new line when program ends
    }
  }