An alternative for “CSharpCodeProvider.Parse”

问题

I'm looking for an alternative for CSharpCodeProvider.Parse. The method was supposed to parse a [C#] code source and return a CompileUnit object. However, the method isn't implemented in any .Net framework.

My purpose is to be able to navigate a C# CodeDOM without having to compile it. I'm writing a application that does some code analysis but I won't necessarily have all external references, which means I can't compile it.

回答1:

SharpDevelop (the open source IDE commonly used for Mono) has a library called NRefactory that allows you to parse C# code and convert it into an AST: http://wiki.sharpdevelop.net/NRefactory.ashx (Excerpt from that link follows):

using (IParser parser = ParserFactory.CreateParser(SupportedLanguage.CSharp, new StringReader(sourceCode))) 
{
    parser.Parse();
    // this allows retrieving comments, preprocessor directives, etc. (stuff that isn't part of the syntax)
    specials = parser.Lexer.SpecialTracker.RetrieveSpecials();
    // this retrieves the root node of the result AST
    result = parser.CompilationUnit;
    if (parser.Errors.Count > 0) {
        MessageBox.Show(parser.Errors.ErrorOutput, "Parse errors");
    }
}

回答2:

There are many free C# parsers, the most popular apparently being:

CsParser (on CodePlex)

回答3:

Actual (2017-2018) info:

More info available at https://github.com/icsharpcode/SharpDevelop/wiki/NRefactory
Download nuget package: "ICSharpCode.NRefactory"

And here is code snippet:

using ICSharpCode.NRefactory.CSharp;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Ns1
{
    public class Foo
    {
        public void Go()
        {       
            CSharpParser parser = new CSharpParser();
            string text = File.ReadAllText("myProgram.cs");
            SyntaxTree syntaxTree = parser.Parse(text);
        }
    }
}

回答4:

Our DMS Software Reengineering Toolkit is a tool for building analysis tools for arbitrary languages. DMS provides generalized parsing, AST navigation and modification, regeneration of source from a modified tree, symbol table support, and various kinds of analysis support as well as the ability to write source-to-source transformations that modify the ASTs directly in terms of surface syntax.

Its C# Front End provides a full C# 4.0 parser (including LINQ) that builds a full abstract syntax tree containing every item of the source text, including comments captured as annotations on source tree nodes that the comments decorate.

来源：https://stackoverflow.com/questions/3631909/an-alternative-for-csharpcodeprovider-parse

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