将IronScheme嵌入C#应用程序中

Question

我正在尝试为我的C#应用​​添加插件架构.我选择了IronScheme作为语言,也因为它是基于DLR构建的,这样可以更容易嵌入.

在Codeplex Wiki上,他们有以下示例.我稍微改了一下:

public class PluggerInner
{
    IScriptEngine scheme;

    public PluggerInner()
    {
        InitScheme();
    }

    private void InitScheme()
    {
        var domMgr = ScriptDomainManager.CurrentManager;
        var schemePrv = new IronSchemeLanguageProvider(domMgr);

        scheme = schemePrv.GetEngine();
    }

    public void RunSchemePlugin(string fileName)
    {
        scheme.ExecuteFile(fileName);
    }

    public void RunPlugins()
    {
        foreach (var fl in new DirectoryInfo("../../plugins").GetFiles())
        {
            if (fl.Extension == ".ss")
            {
                RunSchemePlugin(fl.FullName);
            }
        }
    }
}

(这基本上执行为new PluggerInner().RunPlugins())

它.ss在目录中找到我的示例文件(是的,我知道我不应该使用../..),但在这一行引发了一个大错误:

scheme.ExecuteFile(fileName);

我得到的例外是:

IronScheme.Runtime.R6RS.CompoundCondition was unhandled
  Source="IronScheme"
  StackTrace:
       at IronScheme.Runtime.R6RS.Exceptions.Raise(Object obj)
       at IronScheme.Runtime.R6RS.Exceptions.RaiseContinueable(Object obj)
       at IronScheme.Runtime.Builtins.UndefinedError(Object sym)
       at IronScheme.IronSchemeLanguageContext.MissingName(SymbolId name)
       at Microsoft.Scripting.ModuleGlobalWrapper.GetCachedValue()
       at Microsoft.Scripting.ModuleGlobalWrapper.get_CurrentValue()
       at hello.Initialize(CodeContext )
       at Microsoft.Scripting.ScriptCode.Run(CodeContext codeContext, Boolean tryEvaluate)
       at Microsoft.Scripting.ScriptModule.Execute()
       at Microsoft.Scripting.Hosting.ScriptEngine.ExecuteFile(String path)
       at ExEdit.PluggerInner.RunSchemePlugin(String fileName) in D:\VSProjects\ExEdit\Infra.cs:line 35
       at ExEdit.PluggerInner.RunPlugins() in D:\VSProjects\ExEdit\Infra.cs:line 44
       at ExEdit.MainForm.MainForm_Load(Object sender, EventArgs e) in D:\VSProjects\ExEdit\MainForm.cs:line 22
       at System.Windows.Forms.Form.OnLoad(EventArgs e)
       at System.Windows.Forms.Form.OnCreateControl()
       at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
       at System.Windows.Forms.Control.CreateControl()
       at System.Windows.Forms.Control.WmShowWindow(Message& m)
       at System.Windows.Forms.Control.WndProc(Message& m)
       at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
       at System.Windows.Forms.ContainerControl.WndProc(Message& m)
       at System.Windows.Forms.Form.WmShowWindow(Message& m)
       at System.Windows.Forms.Form.WndProc(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
       at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
       at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
       at System.Windows.Forms.SafeNativeMethods.ShowWindow(HandleRef hWnd, Int32 nCmdShow)
       at System.Windows.Forms.Control.SetVisibleCore(Boolean value)
       at System.Windows.Forms.Form.SetVisibleCore(Boolean value)
       at System.Windows.Forms.Control.set_Visible(Boolean value)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.Run(Form mainForm)
       at ExEdit.Program.Main() in D:\VSProjects\ExEdit\Program.cs:line 18
       at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: 

我的示例Scheme代码:

(define (test) (+ 1 1))

我不知道异常实际上在说什么,因为它没有InnerException.

Answer 1

我认为我没有ExecuteFile正确实施.

最简单的就是抓住load程序.

还有扩展方法,让生活更轻松.

例

using IronScheme; // for extension methods
...
Callable load = "load".Eval<Callable>();
...
load.Call("myfile.ss");

我已经更新了异常处理以提供更好的错误消息(我希望!).