package tool;

import parser.Lexer;
import parser.Parser;
import trees.ExpressionTree;

import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class Interp {
	/** Pull char from where? */
	InputStream in;
	/** Variables used by interpreter */
	public Map variables = new HashMap();
	/** Interpreter output */
	public StringBuffer out = new StringBuffer();

	public static void main(String[] args) throws IOException {
		Interp interpreter = new Interp(System.in);
		interpreter.execute();
		System.out.println(interpreter.out);
	}

	public Interp(InputStream in) {
		this.in = in;
	}

	public void execute() throws IOException {
		Lexer lex = new Lexer(in);
		Parser parser = new Parser(lex);
		List statements = parser.prog();
		for (int i = 0; i < statements.size(); i++) {
			ExpressionTree t = (ExpressionTree) statements.get(i);
			out.append(t.toStringTree()); out.append("\n");
			t.eval(this);
		}
	}
}