Error handling - report compiler error when it occurs. Add extra option for ignoring errors.

src/Generator/Driver.cs

@@ -71,15 +71,19 @@ namespace Cxxi
                 Console.WriteLine("    {0}", diag.Message);
         }
 
-        public void ParseCode()
+        public bool ParseCode()
         {
             Console.WriteLine("Parsing code...");
 
             var parser = new Parser(Options);
             parser.HeaderParsed += OnHeaderParsed;
 
-            parser.ParseHeaders(Options.Headers);
+            if( !parser.ParseHeaders(Options.Headers) )
+                return false;
+            
             Library = parser.Library;
+
+            return true;
         }
 
         public void ProcessCode()
@@ -148,9 +152,12 @@ namespace Cxxi
 
             var driver = new Driver(options, library);
             driver.Setup();
-            driver.ParseCode();
-            driver.ProcessCode();
-            driver.GenerateCode();
+            
+            if (driver.ParseCode())
+            {
+                driver.ProcessCode();
+                driver.GenerateCode();
+            }
         }
     }
 
@@ -169,6 +176,9 @@ namespace Cxxi
         public bool Verbose = false;
         public bool ShowHelpText = false;
         public bool OutputDebug = false;
+        // When set to true - compiler errors are ignored and intermediate 
+        // parsing results still can be used.
+        public bool IgnoreErrors = false;
         public bool OutputInteropIncludes = true;
         public bool GenerateLibraryNamespace;
         public string OutputNamespace;

src/Generator/Parser.cs

@@ -14,10 +14,28 @@ namespace Cxxi
             Library = new Library(options.OutputNamespace, options.LibraryName);
         }
 
-        public void ParseHeaders(IEnumerable<string> headers)
-        {
-            foreach (var header in headers)
-                ParseHeader(header);
+        public bool ParseHeaders(IEnumerable<string> headers)
+        {
+            bool bHasErrors = false;
+            foreach (var header in headers)
+            {
+                var result = ParseHeader(header);
+
+                // If we have some error, report to end-user.
+                if (!options.IgnoreErrors)
+                {
+                    foreach (var diag in result.Diagnostics)
+                    {
+                        if (diag.Level == ParserDiagnosticLevel.Error || diag.Level == ParserDiagnosticLevel.Fatal)
+                        {
+                            Console.WriteLine(String.Format("{0}({1},{2}): error: {3}", diag.FileName, diag.lineNumber, diag.columnNumber, diag.Message));
+                            bHasErrors = true;
+                        }
+                    }
+                } //if
+            }
+
+            return !bHasErrors;
         }
 
         public ParserResult ParseHeader(string file)

src/Parser/Parser.cpp

@@ -1638,6 +1638,21 @@ ParserResult^ Parser::Parse(const std::string& File)
         auto PDiag = ParserDiagnostic();
         PDiag.FileName = marshalString<E_UTF8>(FileName.str());
         PDiag.Message = marshalString<E_UTF8>(Diag.Message.str());
+        PDiag.lineNumber = 0;
+        PDiag.columnNumber = 0;
+
+        //
+        // Idea copied from CGDebugInfo::getLineNumber
+        //
+        if( !Diag.Location.isInvalid() )
+        {
+             clang::PresumedLoc PLoc = Source.getPresumedLoc(Diag.Location);
+             if( PLoc.isValid() )
+             {
+                PDiag.lineNumber = PLoc.getLine();
+                PDiag.columnNumber = PLoc.getColumn();
+             }
+        }
 
         switch( Diag.Level )
         {

src/Parser/Parser.h

@@ -69,6 +69,8 @@ public enum struct ParserDiagnosticLevel
 public value struct ParserDiagnostic
 {
     System::String^ FileName;
+    int lineNumber;
+    int columnNumber;
     System::String^ Message;
     ParserDiagnosticLevel Level;
 };