【Unity】FieldInfo もしくは Type が Unity でシリアライズできるかを調べる拡張メソッド

using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using UnityEngine;
 
public static class FieldInfoExtension
{
    public static bool IsSerializable(this FieldInfo fieldInfo)
    {
        var attributes = fieldInfo.GetCustomAttributes(true);
        if (attributes.Any(attr => attr is NonSerializedAttribute))
            return false;
 
        if (fieldInfo.IsPrivate && !attributes.Any(attr => attr is SerializeField))
            return false;
 
        return fieldInfo.FieldType.IsSerializable;
    }
 
    public static bool IsSerializable(this Type type)
    {
        if (type.IsSubclassOf(typeof(UnityEngine.Object)) ||
            type.IsEnum ||
            type.IsValueType ||
            type == typeof(string)
        )
            return true;
 
        var arrayType = type.GetArrayType();
        if (arrayType != null)
            return arrayType.IsSerializable();
 
        return false;
    }
 
    private static Type GetArrayType(this Type type)
    {
        if (type.IsArray)
            return type.GetElementType();
 
        if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(List<>))
            return type.GetGenericArguments()[0];

        return null;
    }
}