using System;

using System.IO;

namespace AlbLib.Scripting

{

/// <summary>

/// Dummy implementation of <see cref="ScriptExecutionMachine"/> which writes parsed functions to an output.

/// </summary>

[Serializable]

public class DebugExecutor : ScriptExecutionMachine

{

/// <summary>

/// Output where to write debug information.

/// </summary>

public TextWriter Output{get;set;}

/// <summary>

/// Occurs when a comment is found.

/// </summary>

/// <param name="comment">

/// Found comment.

/// </param>

public override void OnComment(string comment)

{

Output.WriteLine("//"+comment);

}

/// <summary>

/// Occurs when a function is called.

/// </summary>

/// <param name="function">

/// Found function name.

/// </param>

/// <param name="args">

/// Found function arguments.

/// </param>

public override void OnFunction(string function, int[] args)

{

Output.WriteLine("{0}({1})", function, String.Join(", ", args));

}

/// <summary>

/// Initializes new instance using <see cref="Console.Out"/> as an output.

/// </summary>

public DebugExecutor() : this(Console.Out)

{}

/// <summary>

/// Initializes new instance using <paramref name="output"/> as an output.

/// </summary>

/// <param name="output">

/// Output where debug information will be written.

/// </param>

public DebugExecutor(TextWriter output)

{

Output = output;

}

/// <summary>

/// Executes a script.

/// </summary>

/// <param name="script">

/// Script text.

/// </param>

/// <returns>

/// True on success.

/// </returns>

/// <exception cref="ScriptExecutionException">

/// When any exception raises in script execution.

/// </exception>

public override bool Execute(string script)

{

ScriptExecutionException exception;

if(!Execute(script, out exception))

{

throw exception;

}else{

return true;

}

}

}

}