[Parser] Added conditional symbols to the compilation unit.

ICSharpCode.NRefactory.CSharp/Ast/CompilationUnit.cs

@@ -61,13 +61,30 @@ namespace ICSharpCode.NRefactory.CSharp
 		public AstNodeCollection<AstNode> Members {
 			get { return GetChildrenByRole(MemberRole); }
 		}
-		
+
+		string[] conditionals = null;
+
 		List<Error> errors = new List<Error> ();
 		
 		public List<Error> Errors {
 			get { return errors; }
 		}
-		
+
+
+		/// <summary>
+		/// Gets the conditional symbols used to parse the source file. Note that this list contains
+		/// the conditional symbols at the start of the first token in the file - including the ones defined
+		/// in the source file.
+		/// </summary>
+		public string[] Conditionals {
+			get {
+				return conditionals ?? new string[0];
+			}
+			internal set {
+				conditionals = value;
+			}
+		}
+
 		/// <summary>
 		/// Gets the expression that was on top of the parse stack.
 		/// This is the only way to get an expression that isn't part of a statment.

ICSharpCode.NRefactory.CSharp/Parser/CSharpParser.cs

@@ -3669,7 +3669,9 @@ namespace ICSharpCode.NRefactory.CSharp
 			if (top.LastYYValue is Mono.CSharp.Expression) {
 				conversionVisitor.Unit.TopExpression = ((Mono.CSharp.Expression)top.LastYYValue).Accept(conversionVisitor) as AstNode;
 			}
+
 			conversionVisitor.Unit.FileName = fileName;
+			conversionVisitor.Unit.Conditionals = top.Conditionals.ToArray ();
 			return conversionVisitor.Unit;
 		}
 		
@@ -3710,11 +3712,12 @@ namespace ICSharpCode.NRefactory.CSharp
 				Location.Initialize (new List<SourceFile> (new [] { file }));
 				var module = new ModuleContainer (ctx);
 				var parser = Driver.Parse (reader, file, module, lineModifier);
-				
+
 				var top = new CompilerCompilationUnit () {
 					ModuleCompiled = module,
 					LocationsBag = parser.LocationsBag,
-					SpecialsBag = parser.Lexer.sbag
+					SpecialsBag = parser.Lexer.sbag,
+					Conditionals = parser.Lexer.SourceFile.Conditionals
 				};
 				var unit = Parse (top, fileName, lineModifier);
 				unit.Errors.AddRange (errorReportPrinter.Errors);

ICSharpCode.NRefactory.CSharp/Parser/mcs/cs-tokenizer.cs

@@ -174,6 +174,13 @@ namespace Mono.CSharp
 
 		readonly SeekableStreamReader reader;
 		readonly CompilationSourceFile source_file;
+
+		public CompilationSourceFile SourceFile {
+			get {
+				return source_file;
+			}
+		}
+
 		readonly CompilerContext context;
 
 		SourceFile current_source;

ICSharpCode.NRefactory.CSharp/Parser/mcs/driver.cs

@@ -369,6 +369,7 @@ namespace Mono.CSharp
 		public ModuleContainer ModuleCompiled { get; set; }
 		public LocationsBag LocationsBag { get; set; }
 		public SpecialsBag SpecialsBag { get; set; }
+		public IEnumerable<string> Conditionals { get; set; }
 		public object LastYYValue { get; set; }
 	}
 

ICSharpCode.NRefactory.CSharp/Parser/mcs/namespace.cs

@@ -591,6 +591,12 @@ namespace Mono.CSharp {
 			}
 		}
 
+		public IEnumerable<string> Conditionals {
+			get {
+				return conditionals.Where (kv => kv.Value).Select (kv => kv.Key);
+			}
+		}
+
 		public string FileName {
 			get {
 				return file.Name;