C++: Output C++ enums as enum classes

Il2CppInspector.Common/Cpp/CppDeclarationGenerator.cs

@@ -1,5 +1,5 @@
 /*
-    Copyright 2017-2020 Katy Coe - http://www.djkaty.com - https://github.com/djkaty
+    Copyright 2017-2021 Katy Coe - http://www.djkaty.com - https://github.com/djkaty
     Copyright 2020 Robert Xiao - https://robertxiao.ca
 
     All rights reserved.
@@ -152,11 +152,12 @@ namespace Il2CppInspector.Cpp
             if (ti.IsEnum) {
                 // Enums should be represented using enum syntax
                 // They otherwise behave like value types
+                var namer = CreateNamespace().MakeNamer<FieldInfo>((field) => field.Name.ToCIdentifier());
                 var underlyingType = AsCType(ti.GetEnumUnderlyingType());
                 valueType = types.Enum(underlyingType, name);
                 foreach (var field in ti.DeclaredFields) {
                     if (field.Name != "value__")
-                        ((CppEnumType)valueType).AddField(EnumNamer.GetName(field), field.DefaultValue);
+                        ((CppEnumType)valueType).AddField(namer.GetName(field), field.DefaultValue);
                 }
 
                 boxedType = GenerateObjectStruct(name + "__Boxed", ti);
@@ -530,7 +531,6 @@ namespace Il2CppInspector.Cpp
 
             GlobalsNamespace = CreateNamespace();
             GlobalNamer = GlobalsNamespace.MakeNamer<MethodBase>((method) => $"{TypeNamer.GetName(method.DeclaringType)}_{method.Name.ToCIdentifier()}");
-            EnumNamer = GlobalsNamespace.MakeNamer<FieldInfo>((field) => $"{TypeNamer.GetName(field.DeclaringType)}_{field.Name.ToCIdentifier()}");
         }
 
         // Reserve C/C++ keywords and built-in names
@@ -571,11 +571,10 @@ namespace Il2CppInspector.Cpp
         public CppNamespace.Namer<TypeInfo> TypeNamer { get; private set; }
 
         /// <summary>
-        /// Namespace for global variables, enum values and methods
+        /// Namespace for global variables and methods
         /// </summary>
         public CppNamespace GlobalsNamespace { get; private set; }
         public CppNamespace.Namer<MethodBase> GlobalNamer { get; private set; }
-        public CppNamespace.Namer<FieldInfo> EnumNamer { get; private set; }
         #endregion
     }
 }

Il2CppInspector.Common/Cpp/CppField.cs

@@ -1,5 +1,5 @@
 /*
-    Copyright 2020 Katy Coe - http://www.djkaty.com - https://github.com/djkaty
+    Copyright 2020-2021 Katy Coe - http://www.djkaty.com - https://github.com/djkaty
 
     All rights reserved.
 */
@@ -78,10 +78,14 @@ namespace Il2CppInspector.Cpp
     // An enum key and value pair
     public class CppEnumField : CppField
     {
+        // The enum type this field belongs to
+        public CppEnumType DeclaringType { get; }
+
         // The value of this key name
         public object Value { get; }
 
-        public CppEnumField(string name, CppType type, object value) : base(name, type) => Value = value;
+        public CppEnumField(CppEnumType declType, string name, CppType type, object value) : base(name, type)
+            => (DeclaringType, Value) = (declType, value);
 
         // We output as hex to avoid unsigned value compiler errors for top bit set values in VS <= 2017
         // We'll get compiler warnings instead but it will still compile
@@ -91,10 +95,12 @@ namespace Il2CppInspector.Cpp
             // Signed number with top bit set (only perform cast if underlying type is signed)
             var fieldIsNegative = signed && ((long) Convert.ChangeType(Value, typeof(long))) < 0;
 
-            if (fieldIsNegative)
+            var fieldName = (format.Contains('c')? DeclaringType.Name + "_" : "") + Name;
-                return $"{Name} = {Value}";
 
-            return string.Format("{0} = 0x{1:x" + Type.SizeBytes * 2 + "}", Name, Value);
+            if (fieldIsNegative)
+                return $"{fieldName} = {Value}";
+
+            return string.Format("{0} = 0x{1:x" + Type.SizeBytes * 2 + "}", fieldName, Value);
         }
     }
 }

Il2CppInspector.Common/Cpp/CppType.cs

@@ -1,5 +1,5 @@
 /*
-    Copyright 2020 Katy Coe - http://www.djkaty.com - https://github.com/djkaty
+    Copyright 2020-2021 Katy Coe - http://www.djkaty.com - https://github.com/djkaty
 
     All rights reserved.
 */
@@ -418,13 +418,13 @@ namespace Il2CppInspector.Cpp
 
         public CppEnumType(CppType underlyingType) : base(ComplexValueType.Enum) => UnderlyingType = underlyingType;
 
-        public void AddField(string name, object value) => AddField(new CppEnumField(name, UnderlyingType, value));
+        public void AddField(string name, object value) => AddField(new CppEnumField(this, name, UnderlyingType, value));
 
         // Return the type as a field
         public override string ToFieldString(string fieldName, string format = "") {
             // C++
             if (!format.Contains('c'))
-                return "enum " + Name + " " + fieldName;
+                return Name + " " + fieldName;
 
             // For the C-compatible definition, we have an alignment problem when the enum
             // does not derive from the architecture integer width.
@@ -439,7 +439,7 @@ namespace Il2CppInspector.Cpp
             if (format.Contains('c'))
                 sb.Append($"enum {Name} {{");
             else
-                sb.Append($"enum {Name} : {UnderlyingType.Name} {{");
+                sb.Append($"enum class {Name} : {UnderlyingType.Name} {{");
 
             foreach (var field in Fields.Values.SelectMany(f => f))
                 sb.Append("\n    " + string.Join("\n    ", field.ToString(format).Split('\n')) + ",");