diff --git a/src/Bridge/Declaration.cs b/src/Bridge/Declaration.cs
index 45f1134d..a1586bce 100644
--- a/src/Bridge/Declaration.cs
+++ b/src/Bridge/Declaration.cs
@@ -1,4 +1,5 @@
-using System.Collections.Generic;
+using System;
+using System.Collections.Generic;
 using Cxxi;
 
 namespace Cxxi
@@ -14,6 +15,15 @@ namespace Cxxi
         QualifiedType QualifiedType { get; }
     }
 
+    [Flags]
+    public enum IgnoreFlags
+    {
+        None = 0,
+        Generation = 1 << 0,
+        Processing = 1 << 1,
+        Explicit   = 1 << 2
+    }
+
     /// <summary>
     /// Represents a C++ declaration.
     /// </summary>
@@ -51,17 +61,64 @@ namespace Cxxi
         // Doxygen-style brief comment.
         public string BriefComment;
 
-        // Whether the declaration should be ignored.
-        public virtual bool Ignore
+        // Keeps flags to know the type of ignore.
+        public IgnoreFlags IgnoreFlags { get; set; }
+
+        // Whether the declaration should be generated.
+        public virtual bool IsGenerated
         {
             get
             {
-                return ExplicityIgnored || Namespace.Ignore;
+                return !IgnoreFlags.HasFlag(IgnoreFlags.Generation) ||
+                    Namespace.IsGenerated;
+            }
+
+            set
+            {
+                if (value)
+                    IgnoreFlags |= IgnoreFlags.Generation;
+                else
+                    IgnoreFlags &= ~IgnoreFlags.Generation;
+            }
+        }
+
+        // Whether the declaration should be processed.
+        public virtual bool IsProcessed
+        {
+            get
+            {
+                return !IgnoreFlags.HasFlag(IgnoreFlags.Processing) ||
+                    Namespace.IsProcessed;
+            }
+
+            set
+            {
+                if (value)
+                    IgnoreFlags |= IgnoreFlags.Processing;
+                else
+                    IgnoreFlags &= ~IgnoreFlags.Processing;
             }
         }
 
         // Whether the declaration was explicitly ignored.
-        public bool ExplicityIgnored;
+        public bool ExplicityIgnored
+        {
+            get { return IgnoreFlags.HasFlag(IgnoreFlags.Explicit); }
+
+            set
+            {
+                if (value)
+                    IgnoreFlags |= IgnoreFlags.Explicit;
+                else
+                    IgnoreFlags &= ~IgnoreFlags.Explicit;
+            }
+        }
+
+        // Whether the declaration should be ignored.
+        public bool Ignore
+        {
+            get { return IgnoreFlags != IgnoreFlags.None; }
+        }
 
         // Contains debug text about the declaration.
         public string DebugText;
@@ -77,11 +134,13 @@ namespace Cxxi
 
         protected Declaration()
         {
+            IgnoreFlags = IgnoreFlags.None;
         }
 
         protected Declaration(string name)
         {
             Name = name;
+            IgnoreFlags = IgnoreFlags.None;
         }
 
         public override string ToString()
diff --git a/src/Bridge/Library.cs b/src/Bridge/Library.cs
index 46755c09..a5aee0a4 100644
--- a/src/Bridge/Library.cs
+++ b/src/Bridge/Library.cs
@@ -1,7 +1,6 @@
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.IO;
-using System.Linq;
 
 namespace Cxxi
 {
@@ -33,10 +32,16 @@ namespace Cxxi
         /// Contains the macros present in the unit.
         public List<MacroDefinition> Macros;
 
-        /// If the module should be ignored.
-        public override bool Ignore
+        // Whether the unit should be generated.
+        public override bool IsGenerated
         {
-            get { return ExplicityIgnored; }
+            get { return !IgnoreFlags.HasFlag(IgnoreFlags.Generation); }
+        }
+
+        // Whether the unit should be processed.
+        public override bool IsProcessed
+        {
+            get { return !IgnoreFlags.HasFlag(IgnoreFlags.Processing); }
         }
 
         public bool IsSystemHeader { get; set; }
diff --git a/src/Bridge/Namespace.cs b/src/Bridge/Namespace.cs
index 6e2df816..424889ab 100644
--- a/src/Bridge/Namespace.cs
+++ b/src/Bridge/Namespace.cs
@@ -19,7 +19,6 @@ namespace Cxxi
         public List<Template> Templates;
         public List<TypedefDecl> Typedefs;
 
-        // Translation unit the declaration is contained in.
         public TranslationUnit TranslationUnit
         {
             get
@@ -31,10 +30,22 @@ namespace Cxxi
             }
         }
 
-        /// If the namespace should be ignored.
-        public override bool Ignore
+        public override bool IsGenerated
         {
-            get { return ExplicityIgnored || Parent.Ignore; }
+            get
+            {
+                return !IgnoreFlags.HasFlag(IgnoreFlags.Generation) ||
+                    Parent.IsGenerated;
+            }
+        }
+
+        public override bool IsProcessed
+        {
+            get
+            {
+                return !IgnoreFlags.HasFlag(IgnoreFlags.Processing) ||
+                    Parent.IsProcessed;
+            }
         }
 
         public Namespace()
diff --git a/src/Generator/Driver.cs b/src/Generator/Driver.cs
index ff9c90c2..fbd71357 100644
--- a/src/Generator/Driver.cs
+++ b/src/Generator/Driver.cs
@@ -127,7 +127,7 @@ namespace Cxxi
             // Process everything in the global namespace for now.
             foreach (var unit in Library.TranslationUnits)
             {
-                if (unit.ExplicityIgnored || !unit.HasDeclarations)
+                if (unit.Ignore || !unit.HasDeclarations)
                     continue;
 
                 if (unit.IsSystemHeader)
diff --git a/src/Generator/Library.cs b/src/Generator/Library.cs
index 49468c3c..e3fa7208 100644
--- a/src/Generator/Library.cs
+++ b/src/Generator/Library.cs
@@ -276,7 +276,11 @@ namespace Cxxi
                 m => Regex.Match(m.FilePath, pattern).Success);
 
             foreach (var module in modules)
+            {
+                module.IsGenerated = false;
+                module.IsProcessed = true;
                 module.ExplicityIgnored = true;
+            }
         }
 
         #endregion
diff --git a/src/Generator/Passes/CleanInvalidDeclNamesPass.cs b/src/Generator/Passes/CleanInvalidDeclNamesPass.cs
index ef60eed1..2d754b39 100644
--- a/src/Generator/Passes/CleanInvalidDeclNamesPass.cs
+++ b/src/Generator/Passes/CleanInvalidDeclNamesPass.cs
@@ -1,8 +1,6 @@
 using System;
 using System.Collections.Generic;
-using System.Diagnostics;
 using System.Linq;
-using Cxxi.Types;
 
 namespace Cxxi.Passes
 {
@@ -18,7 +16,7 @@ namespace Cxxi.Passes
 
         public override bool ProcessUnit(TranslationUnit unit)
         {
-            if (unit.ExplicityIgnored)
+            if (unit.Ignore)
                 return false;
 
             if (unit.IsSystemHeader)