Support explicit values in flag properties, add C# flags support

- Add support for explicit values in properties using `PROPERTY_HINT_FLAGS`
that works the same way it does for enums.
- Fix enums and flags in VisualScriptEditor (it wasn't considering the
explicit value).
- Use `PROPERTY_HINT_FLAGS` for C# enums with the FlagsAttribute instead
of `PROPERTY_HINT_ENUM`.

1 files changed, 5 insertions, 0 deletions

diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/MarshalUtils.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/MarshalUtils.cs
index ee4d0eed08..50ae2eb112 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/MarshalUtils.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/MarshalUtils.cs
@@ -80,6 +80,11 @@ namespace Godot
         private static bool TypeIsGenericIDictionary(Type type) => type.GetGenericTypeDefinition() == typeof(IDictionary<,>);
 
         /// <summary>
+        /// Returns <see langword="true"/> if the <see cref="FlagsAttribute"/> is applied to the given type.
+        /// </summary>
+        private static bool TypeHasFlagsAttribute(Type type) => type.IsDefined(typeof(FlagsAttribute), false);
+
+        /// <summary>
         /// Returns the generic type definition of <paramref name="type"/>.
         /// </summary>
         /// <exception cref="InvalidOperationException">