Click here to Skip to main content
15,860,859 members
Articles / Programming Languages / C#

CodeDom Assistant

Rate me:
Please Sign up or sign in to vote.
4.84/5 (26 votes)
21 Sep 20074 min read 136.5K   6.6K   82  
Generating CodeDom Code By Parsing C# or VB
// <file>
//     <copyright see="prj:///doc/copyright.txt"/>
//     <license see="prj:///doc/license.txt"/>
//     <owner name="Mike Krüger" email="mike@icsharpcode.net"/>
//     <version>$Revision: 2517 $</version>
// </file>

using System;
using System.Collections.Generic;
using ICSharpCode.NRefactory.Ast;

namespace ICSharpCode.NRefactory.Parser
{
	public abstract class AbstractParser : IParser
	{
		protected const int    MinErrDist   = 2;
		protected const string ErrMsgFormat = "-- line {0} col {1}: {2}";  // 0=line, 1=column, 2=text
		
		
		private Errors errors;
		private ILexer lexer;
		
		protected int    errDist = MinErrDist;
		
		[CLSCompliant(false)]
		protected CompilationUnit compilationUnit;
		
		bool parseMethodContents = true;
		
		public bool ParseMethodBodies {
			get {
				return parseMethodContents;
			}
			set {
				parseMethodContents = value;
			}
		}
		
		public ILexer Lexer {
			get {
				return lexer;
			}
		}
		
		public Errors Errors {
			get {
				return errors;
			}
		}
		
		public CompilationUnit CompilationUnit {
			get {
				return compilationUnit;
			}
		}
		
		internal AbstractParser(ILexer lexer)
		{
			this.errors = lexer.Errors;
			this.lexer  = lexer;
			errors.SynErr = new ErrorCodeProc(SynErr);
		}
		
		public abstract void Parse();
		
		public abstract Expression ParseExpression();
		public abstract BlockStatement ParseBlock();
		public abstract List<INode> ParseTypeMembers();
		
		protected abstract void SynErr(int line, int col, int errorNumber);
		
		protected void SynErr(int n)
		{
			if (errDist >= MinErrDist) {
				errors.SynErr(lexer.LookAhead.line, lexer.LookAhead.col, n);
			}
			errDist = 0;
		}
		
		protected void SemErr(string msg)
		{
			if (errDist >= MinErrDist) {
				errors.Error(lexer.Token.line, lexer.Token.col, msg);
			}
			errDist = 0;
		}
		
		protected void Expect(int n)
		{
			if (lexer.LookAhead.kind == n) {
				lexer.NextToken();
			} else {
				SynErr(n);
			}
		}
		
		#region System.IDisposable interface implementation
		[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1063:ImplementIDisposableCorrectly")]
		public void Dispose()
		{
			errors = null;
			if (lexer != null) {
				lexer.Dispose();
			}
			lexer = null;
		}
		#endregion
	}
}

By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.

If a file you wish to view isn't highlighted, and is a text file (not binary), please let us know and we'll add colourisation support for it.

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here


Written By
Web Developer
Australia Australia
This member has not yet provided a Biography. Assume it's interesting and varied, and probably something to do with programming.

Comments and Discussions