Added the option to have attributes generated.

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

src/AST/Attribute.cs

@@ -0,0 +1,18 @@
+namespace CppSharp.AST
+{
+    /// <summary>
+    /// Gives the ability to specify attributes to generate, for example ObsoleteAttribute.
+    /// </summary>
+    public class Attribute
+    {
+        public Attribute()
+        {
+            Type = typeof(object);
+            Value = string.Empty;
+        }
+
+        public System.Type Type { get; set; }
+
+        public string Value { get; set; }
+    }
+}

src/AST/Declaration.cs

@@ -200,12 +200,15 @@ namespace CppSharp.AST
         public IntPtr OriginalPtr;
         private string originalName;
 
+        public List<Attribute> Attributes { get; private set; }
+
         protected Declaration()
         {
             Access = AccessSpecifier.Public;
             IgnoreFlags = IgnoreFlags.None;
             ExcludeFromPasses = new HashSet<System.Type>();
             PreprocessedEntities = new List<PreprocessedEntity>();
+            Attributes = new List<Attribute>();
         }
 
         protected Declaration(string name)

src/Generator/Generators/CSharp/CSharpTextTemplate.cs

@@ -8,6 +8,7 @@ using System.Text.RegularExpressions;
 using System.Web.Util;
 using CppSharp.AST;
 using CppSharp.Utils;
+using Attribute = CppSharp.AST.Attribute;
 using Type = CppSharp.AST.Type;
 
 namespace CppSharp.Generators.CSharp
@@ -280,12 +281,14 @@ namespace CppSharp.Generators.CSharp
 
         public void GenerateDeclarationCommon(Declaration decl)
         {
-            if (decl.Comment == null)
+            if (decl.Comment != null)
-                return;
+            {
-
                 GenerateComment(decl.Comment);
                 GenerateDebug(decl);
             }
+            foreach (Attribute attribute in decl.Attributes)
+                WriteLine("[{0}({1})]", attribute.Type.FullName, attribute.Value);
+        }
 
         public void GenerateDebug(Declaration decl)
         {

src/Generator/Types/TypeMap.cs

@@ -5,6 +5,7 @@ using CppSharp.Generators;
 using CppSharp.Generators.AST;
 using CppSharp.Generators.CLI;
 using CppSharp.Generators.CSharp;
+using Attribute = System.Attribute;
 using Type = CppSharp.AST.Type;
 
 namespace CppSharp.Types

tests/CSharpTemp/CSharpTemp.Tests.cs

@@ -1,4 +1,6 @@
-using System.Reflection;
+using System;
+using System.Linq;
+using System.Reflection;
 using CSharpTemp;
 using NUnit.Framework;
 using Foo = CSharpTemp.Foo;
@@ -76,4 +78,12 @@ public class CSharpTempTests
         Assert.That(p.Test, Is.True);
         Assert.That(p.IsBool, Is.False);
     }
+
+    [Test]
+    public void TestAttributes()
+    {
+        Assert.That(typeof(Qux).GetMethod("Obsolete")
+            .GetCustomAttributes(typeof(ObsoleteAttribute), false).Length,
+            Is.GreaterThan(0));
+    }
 }

tests/CSharpTemp/CSharpTemp.cpp

@@ -46,6 +46,11 @@ int Qux::farAwayFunc() const
     return 20;
 }
 
+void Qux::obsolete()
+{
+
+}
+
 int Bar::method()
 {
     return 2;

tests/CSharpTemp/CSharpTemp.cs

@@ -1,9 +1,11 @@
-using CppSharp.AST;
+using System;
+using CppSharp.AST;
 using CppSharp.Generators;
 using CppSharp.Generators.CSharp;
 using CppSharp.Passes;
 using CppSharp.Types;
 using CppSharp.Utils;
+using Attribute = CppSharp.AST.Attribute;
 
 namespace CppSharp.Tests
 {
@@ -28,6 +30,23 @@ namespace CppSharp.Tests
         }
     }
 
+    public class TestAttributesPass : TranslationUnitPass
+    {
+        public override bool VisitFunctionDecl(Function function)
+        {
+            if (!AlreadyVisited(function) && function.Name == "obsolete")
+            {
+                Attribute attribute = new Attribute
+                {
+                    Type = typeof(ObsoleteAttribute),
+                    Value = string.Format("\"{0} is obsolete.\"", function.Name)
+                };
+                function.Attributes.Add(attribute);
+            }
+            return base.VisitFunctionDecl(function);
+        }
+    }
+
     public class CSharpTempTests : LibraryTest
     {
         public CSharpTempTests(GeneratorKind kind)
@@ -40,6 +59,7 @@ namespace CppSharp.Tests
             driver.Options.GenerateInterfacesForMultipleInheritance = true;
             driver.Options.GenerateProperties = true;
             driver.Options.GenerateVirtualTables = true;
+            driver.TranslationUnitPasses.AddPass(new TestAttributesPass());
         }
 
         public override void Postprocess(Driver driver, ASTContext lib)

tests/CSharpTemp/CSharpTemp.h

@@ -25,6 +25,7 @@ public:
     Qux(Foo foo);
     int farAwayFunc() const;
     int array[3];
+    void obsolete();
 };
 
 class DLL_API Bar : public Qux