C# 调用GetScanner但从不使用它

因此，我正在尝试为DSL创建自己的visual studio语言插件。我的问题是，我已经实现了

LanguageService

并覆盖了GetScanner。通过调试，我看到它实际上返回了

IScanner

实现，但它从不调用

scantoken和providedinfo aboutit

所有这些加载都是在打开一个带有我的语言包所绑定的扩展名的文件之后发生的，这让我相信它实际上是在尝试使用我的插件

我在这里有点迷茫，创建VisualStudio插件的过程表面上看起来很直观，但表面上似乎被诅咒了

internal class ValLanguageScanner : IScanner
{
    private IVsTextBuffer m_buffer;
    string m_source;

    public ValLanguageScanner(IVsTextBuffer buffer)
    {
        // Breakpoint gets hit here(to to creation in GetScanner method)
        m_buffer = buffer;
    }

    bool IScanner.ScanTokenAndProvideInfoAboutIt(TokenInfo tokenInfo, ref int state)
    {
        // Breakpoint never gets hit here
        var foundToken = false;
        return foundToken;
    }

    void IScanner.SetSource(string source, int offset)
    {
        m_source = source.Substring(offset);
    }
}

public class ValLanguageService : LanguageService
{
    private const string _name = "Val";
    private LanguagePreferences m_preferences;
    private ValLanguageScanner m_scanner;

    public override LanguagePreferences GetLanguagePreferences()
    {
        if (m_preferences == null)
        {
            m_preferences = new LanguagePreferences(this.Site,typeof(ValLanguageService).GUID,this.Name);
            m_preferences.Init();
        }
        return m_preferences;
    }

    public override IScanner GetScanner(IVsTextLines buffer)
    {
        if (m_scanner == null)
        {
            m_scanner = new ValLanguageScanner(buffer);
        }
        return m_scanner;
    }

    public override AuthoringScope ParseSource(ParseRequest req)
    {
        return new ValLanguageAuthoringScope();
    }

    public override string GetFormatFilterList()
    {
        return "Val(*.val)|*.val";
    }

    public override string Name
    {
        get { return _name; }
    }
}

    [PackageRegistration(UseManagedResourcesOnly = true)]
[ProvideServiceAttribute(typeof(ValLanguageService),
                         ServiceName = "Val Language Service")]
[ProvideLanguageExtensionAttribute(typeof(ValLanguageService),
                                   ".val")]
[ProvideLanguageExtensionAttribute(typeof(ValLanguageService),
                                   ".vallist")]
[InstalledProductRegistration("#110", "#112", "1.0")]
public class ValLanguagePackage : Package, IOleComponent
{
    private uint m_componentID;

    public ValLanguagePackage()
    {
        Trace.WriteLine(string.Format(CultureInfo.CurrentCulture, "Entering constructor for: {0}", this.ToString()));
    }

    protected override void Initialize()
    {
        base.Initialize();  // required

        // Proffer the service.
        IServiceContainer serviceContainer = this as IServiceContainer;
        ValLanguageService langService = new ValLanguageService();
        langService.SetSite(this);
        serviceContainer.AddService(typeof(ValLanguageService),
                                    langService,
                                    true);

        // Register a timer to call our language service during
        // idle periods.
        IOleComponentManager mgr = GetService(typeof(SOleComponentManager))
                                   as IOleComponentManager;
        if (m_componentID == 0 && mgr != null)
        {
            OLECRINFO[] crinfo = new OLECRINFO[1];
            crinfo[0].cbSize = (uint)Marshal.SizeOf(typeof(OLECRINFO));
            crinfo[0].grfcrf = (uint)_OLECRF.olecrfNeedIdleTime |
                                          (uint)_OLECRF.olecrfNeedPeriodicIdleTime;
            crinfo[0].grfcadvf = (uint)_OLECADVF.olecadvfModal |
                                          (uint)_OLECADVF.olecadvfRedrawOff |
                                          (uint)_OLECADVF.olecadvfWarningsOff;
            crinfo[0].uIdleTimeInterval = 1000;
            int hr = mgr.FRegisterComponent(this, crinfo, out m_componentID);
        }
    }


    protected override void Dispose(bool disposing)
    {
        if (m_componentID != 0)
        {
            Debug.WriteLine("OMG DISPOSING");
            IOleComponentManager mgr = GetService(typeof(SOleComponentManager))
                                       as IOleComponentManager;
            if (mgr != null)
            {
                int hr = mgr.FRevokeComponent(m_componentID);
            }
            m_componentID = 0;
        }
        Debug.WriteLine("OMG DISPOSING BASE");
        base.Dispose(disposing);
        Debug.WriteLine("OMG DISPOSED");
    }


    #region IOleComponent Members

    public int FDoIdle(uint grfidlef)
    {
        bool bPeriodic = (grfidlef & (uint)_OLEIDLEF.oleidlefPeriodic) != 0;
        // Use typeof(TestLanguageService) because we need to
        // reference the GUID for our language service.
        LanguageService service = GetService(typeof(ValLanguageService))
                                  as LanguageService;
        if (service != null)
        {
            service.OnIdle(bPeriodic);
        }
        return 0;
    }

    public int FContinueMessageLoop(uint uReason,
                                    IntPtr pvLoopData,
                                    MSG[] pMsgPeeked)
    {
        return 1;
    }

    public int FPreTranslateMessage(MSG[] pMsg)
    {
        return 0;
    }

    public int FQueryTerminate(int fPromptUser)
    {
        return 1;
    }

    public int FReserved1(uint dwReserved,
                          uint message,
                          IntPtr wParam,
                          IntPtr lParam)
    {
        return 1;
    }

    public IntPtr HwndGetWindow(uint dwWhich, uint dwReserved)
    {
        return IntPtr.Zero;
    }

    public void OnActivationChange(IOleComponent pic,
                                   int fSameComponent,
                                   OLECRINFO[] pcrinfo,
                                   int fHostIsActivating,
                                   OLECHOSTINFO[] pchostinfo,
                                   uint dwReserved)
    {
    }

    public void OnAppActivate(int fActive, uint dwOtherThreadID)
    {
    }

    public void OnEnterState(uint uStateID, int fEnter)
    {
    }

    public void OnLoseActivation()
    {
    }

    public void Terminate()
    {
    }

    #endregion
}

---

我知道你的感受。解决此类问题的最简单方法是直接调试VS2013代码（语言部分主要是用C#！编写的）。找一个可以生成pdb的反编译器（例如Reflector），看看什么时候和为什么要调用ScanTokenandProvideInfo。顺便说一下，我不建议您实现这样的语言。看看PyTools实现，看看它们是如何集成python语言的。我去过你的地方，没有接到电话的方法，等等。。下一个问题是ParseSource没有被调用：-）如果要添加语法高亮显示，请实现IClassizer。我需要语法高亮显示以及intellisense（在这里更重要）。然后实现IIntellisenseController。但是自定义项目类型和构建过程等呢？所有这些都还没有出现在MEF中，是吗？