示例代码：
// Interpreter
namespace Interpreter_DesignPattern
{
using System;
using System.Collections;
class Context
{
}
abstract class AbstractExpression
{
abstract public void Interpret(Context c);
}
// class for terminal symbol
class TerminalExpression : AbstractExpression
{
override public void Interpret(Context c)
{
}
}
// class for grammar rule (one per rule needed)
class NonterminalExpression : AbstractExpression
{
override public void Interpret(Context c)
{
}
}
// to extend grammar, just add other NonterminalExpression classes
/// <summary>
/// Summary description for Client.
/// </summary>
public class Client
{
public static int Main(string[] args)
{
Context c = new Context();
ArrayList l = new ArrayList(); //really need a tree here!
// build up context information
// . . .
// Populate abstract syntax tree with data
l.Add(new TerminalExpression());
l.Add(new NonterminalExpression());
// interpret
foreach (AbstractExpression exp in l)
{
exp.Interpret(c);
}
return 0;
}
}
}
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