Simplify ClangParser by making it static

Signed-off-by: Dimitar Dobrev <dpldobrev@protonmail.com>

src/Generator/Driver.cs

@@ -124,19 +124,18 @@ namespace CppSharp
 
         public bool ParseCode()
         {
-            var astContext = new Parser.AST.ASTContext();
-
-            var parser = new ClangParser(astContext);
-            parser.SourcesParsed += OnSourceFileParsed;
+            ClangParser.SourcesParsed += OnSourceFileParsed;
 
             var sourceFiles = Options.Modules.SelectMany(m => m.Headers);
 
             ParserOptions.BuildForSourceFile(Options.Modules);
-            using (ParserResult result = parser.ParseSourceFiles(
+            using (ParserResult result = ClangParser.ParseSourceFiles(
                 sourceFiles, ParserOptions))
                 Context.TargetInfo = result.TargetInfo;
 
-            Context.ASTContext = ClangParser.ConvertASTContext(astContext);
+            Context.ASTContext = ClangParser.ConvertASTContext(ParserOptions.ASTContext);
+
+            ClangParser.SourcesParsed -= OnSourceFileParsed;
 
             return !hasParsingErrors;
         }
@@ -161,6 +160,7 @@ namespace CppSharp
 
         public bool ParseLibraries()
         {
+            ClangParser.LibraryParsed += OnFileParsed;
             foreach (var module in Options.Modules)
             {
                 foreach (var libraryDir in module.LibraryDirs)
@@ -171,10 +171,7 @@ namespace CppSharp
                     if (Context.Symbols.Libraries.Any(l => l.FileName == library))
                         continue;
 
-                    var parser = new ClangParser();
-                    parser.LibraryParsed += OnFileParsed;
-
-                    using (var res = parser.ParseLibrary(library, ParserOptions))
+                    using (var res = ClangParser.ParseLibrary(library, ParserOptions))
                     {
                         if (res.Kind != ParserResultKind.Success)
                             continue;
@@ -183,6 +180,7 @@ namespace CppSharp
                     }
                 }
             }
+            ClangParser.LibraryParsed -= OnFileParsed;
 
             Context.Symbols.IndexSymbols();
             SortModulesByDependencies();

src/Parser/Parser.cs

@@ -8,37 +8,22 @@ using NativeLibrary = CppSharp.Parser.AST.NativeLibrary;
 
 namespace CppSharp
 {
-    public class ClangParser
+    public static class ClangParser
     {
-        /// <summary>
-        /// Context with translation units ASTs.
-        /// </summary>
-        public ASTContext ASTContext { get; private set; }
-
         /// <summary>
         /// Fired when source files are parsed.
         /// </summary>
-        public Action<IEnumerable<string>, ParserResult> SourcesParsed = delegate {};
+        public static Action<IEnumerable<string>, ParserResult> SourcesParsed = delegate {};
 
         /// <summary>
         /// Fired when library files are parsed.
         /// </summary>
-        public Action<string, ParserResult> LibraryParsed = delegate {};
-
-        public ClangParser()
-        {
-            ASTContext = new ASTContext();
-        }
-
-        public ClangParser(ASTContext context)
-        {
-            ASTContext = context;
-        }
+        public static Action<string, ParserResult> LibraryParsed = delegate {};
 
         /// <summary>
         /// Parses a C++ source file as a translation unit.
         /// </summary>
-        public ParserResult ParseSourceFile(string file, ParserOptions options)
+        public static ParserResult ParseSourceFile(string file, ParserOptions options)
         {
             return ParseSourceFiles(new [] { file }, options);
         }
@@ -46,9 +31,9 @@ namespace CppSharp
         /// <summary>
         /// Parses a set of C++ source files as a single translation unit.
         /// </summary>
-        public ParserResult ParseSourceFiles(IEnumerable<string> files, ParserOptions options)
+        public static ParserResult ParseSourceFiles(IEnumerable<string> files, ParserOptions options)
         {
-            options.ASTContext = ASTContext;
+            options.ASTContext = new ASTContext();
 
             foreach (var file in files)
                 options.AddSourceFiles(file);
@@ -62,7 +47,7 @@ namespace CppSharp
         /// <summary>
         /// Parses a library file with symbols.
         /// </summary>
-        public ParserResult ParseLibrary(string file, ParserOptions options)
+        public static ParserResult ParseLibrary(string file, ParserOptions options)
         {
             options.LibraryFile = file;