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ParseRequest Class

Provides information to execute a parsing operation in a language service.

This API is not CLS-compliant. 

Inheritance Hierarchy

System.Object
  Microsoft.VisualStudio.Package.ParseRequest

Namespace:  Microsoft.VisualStudio.Package
Assemblies:   Microsoft.VisualStudio.Package.LanguageService (in Microsoft.VisualStudio.Package.LanguageService.dll)
  Microsoft.VisualStudio.Package.LanguageService.11.0 (in Microsoft.VisualStudio.Package.LanguageService.11.0.dll)
  Microsoft.VisualStudio.Package.LanguageService.9.0 (in Microsoft.VisualStudio.Package.LanguageService.9.0.dll)
  Microsoft.VisualStudio.Package.LanguageService.10.0 (in Microsoft.VisualStudio.Package.LanguageService.10.0.dll)

Syntax

'Declaration
<CLSCompliantAttribute(False)> _
Public Class ParseRequest
[CLSCompliantAttribute(false)]
public class ParseRequest
[CLSCompliantAttribute(false)]
public ref class ParseRequest
[<CLSCompliantAttribute(false)>]
type ParseRequest =  class end
public class ParseRequest

The ParseRequest type exposes the following members.

Constructors

  Name Description
Public method ParseRequest(Boolean) Initializes a new instance of the ParseRequest class in order to terminate the thread used for background parsing operations.
Public method ParseRequest(Int32, Int32, TokenInfo, String, String, ParseReason, IVsTextView, AuthoringSink, Boolean) Initializes a new instance of the ParseRequest class.

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Properties

  Name Description
Public property Callback Specifies the callback delegate to be called when the parsing operation has completed.
Public property Col Specifies the character offset on the first line to begin the parsing operation.
Public property DirtySpan Specifies a span of source that has changed.
Public property FileName Specifies the name of the source file being parsed.
Public property IsSynchronous Gets or sets whether or not the request is synchronous.
Public property Line Specifies the line on which to start the parsing operation.
Public property Reason Specifies the reason the parsing operation was started.
Public property Scope Specifies the AuthoringScope object that is used to return extended information from the parsing operation.
Public property Sink Specifies an AuthoringSink object used to contain information from the parsing operation.
Public property Terminate Specifies whether the worker thread handling background parsing operations should exit.
Public property Text Specifies the source text to be parsed.
Public property Timestamp Specifies a time stamp for the parse request.
Public property TokenInfo Specifies a TokenInfo structure that is filled in with the results of the parsing operation.
Public property View Specifies the IVsTextView object representing the view that contains the source that is being parsed.

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Methods

  Name Description
Public method Equals Determines whether the specified object is equal to the current object. (Inherited from Object.)
Protected method Finalize Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public method GetHashCode Serves as a hash function for a particular type. (Inherited from Object.)
Public method GetType Gets the Type of the current instance. (Inherited from Object.)
Protected method MemberwiseClone Creates a shallow copy of the current Object. (Inherited from Object.)
Public method ToString Returns a string that represents the current object. (Inherited from Object.)

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Remarks

This class is used to communicate information to a parser about a particular parsing operation and to return information about the parsing operation. The source used by the parser is accessed as a single block of text through the Text property. This text is passed to the ParseRequest constructor.

Notes to Implementers

Everything a typical parsing operation needs can be found in this class so there should be no reason to derive from this class. However, if you do need to derive a class from the ParseRequest class, you must derive a class from the LanguageService class and override the CreateParseRequest method to instantiate your own version of the ParseRequest class.

Note that if your language service is going to support parsing variables for display in the Autos debugging window and/or support validation of breakpoints, you must derive a class from the AuthoringSink class and set the Sink property in an instance of the ParseRequest class to your version of the AuthoringSink class. This can be done in the CreateParseRequest method after the ParseRequest object is created.

Notes to Callers

This class is instantiated by a call to the CreateParseRequest method in the LanguageService class.

Do not attempt to use the View property in a background thread: the IVsTextView object is meant only for foreground use by the base Source class.

Examples

This example shows how to create a new ParseRequest object with a custom AuthoringSink object (the class for which is not shown).

using Microsoft.VisualStudio.Package;
using Microsoft.VisualStudio.TextManager.Interop;

namespace MyLanguagePackage
{
    class MyLanguageService : LanguageService
    {
        public ParseRequest CreateParseRequest(Source s, 
                                               int line, 
                                               int idx, 
                                               TokenInfo info, 
                                               string sourceText, 
                                               string fname, 
                                               ParseReason reason, 
                                               IVsTextView view)
        {
             ParseRequest req = new ParseRequest(line,
                                                 idx,
                                                 info,
                                                 sourceText,
                                                 fname,
                                                 reason,
                                                 view);
             if (req != null)
             {
                  req.Sink = new MyAuthoringSink(reason, line, idx);
             }
             return req;
         }
    }
}

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

See Also

Reference

Microsoft.VisualStudio.Package Namespace