Fixed resolving of incomplete enum declarations.

src/AST/Library.cs

@@ -141,6 +141,16 @@ namespace CppSharp.AST
             }
         }
 
+        /// Finds the complete declaration of an enum.
+        public Enumeration FindCompleteEnum(string name)
+        {
+            foreach (var @enum in FindEnum(name))
+                if (!@enum.IsIncomplete)
+                    return @enum;
+
+            return null;
+        }
+
         /// Finds an existing struct/class in the library modules.
         public IEnumerable<Class> FindClass(string name, bool create = false)
         {

src/Generator/Passes/ResolveIncompleteDeclsPass.cs

@@ -5,12 +5,20 @@ namespace CppSharp.Passes
 {
     public class ResolveIncompleteDeclsPass : TranslationUnitPass
     {
-        public override bool VisitClassDecl(Class @class)
+        public override bool VisitDeclaration(Declaration decl)
         {
-            if (AlreadyVisited(@class))
+            if (AlreadyVisited(decl))
+                return false;
+
+            if (decl.Ignore)
                 return false;
 
-            if (@class.Ignore)
+            return true;
+        }
+
+        public override bool VisitClassDecl(Class @class)
+        {
+            if (!VisitDeclaration(@class))
                 return false;
 
             if (!@class.IsIncomplete)
@@ -33,5 +41,31 @@ namespace CppSharp.Passes
 
             return base.VisitClassDecl(@class);
         }
+
+        public override bool VisitEnumDecl(Enumeration @enum)
+        {
+            if (!VisitDeclaration(@enum))
+                return false;
+
+            if (!@enum.IsIncomplete)
+                goto Out;
+
+            if (@enum.CompleteDeclaration != null)
+                goto Out;
+
+            @enum.CompleteDeclaration =
+                Library.FindCompleteEnum(@enum.QualifiedName);
+
+            if (@enum.CompleteDeclaration == null)
+            {
+                @enum.IsGenerated = false;
+                Driver.Diagnostics.EmitWarning(DiagnosticId.UnresolvedDeclaration,
+                    "Unresolved declaration: {0}", @enum.Name);
+            }
+
+        Out:
+
+            return base.VisitEnumDecl(@enum);
+        }
     }
 }