Change usage of RequiredMemberAttribute to PreserveAttribute

Unity does not preserve members marked with attributes that inherit RequiredMemberAttribute, but do preserve members with attributes that inherit PreserveAttribute.

Plugins/tools~/fix-library-path.sed

@@ -30,9 +30,9 @@ s/static string Quote/public static string Quote/
 # Make SQLite3 class partial, to extend in another file
 s/class SQLite3/partial class SQLite3/
 
-# Make column attributes inherit Unity's RequiredMemberAttribute
+# Make column attributes inherit Unity's PreserveAttribute
 # This fixes managed code stripping removing getter/setter methods
-s/public class (PrimaryKey|AutoIncrement|Indexed|MaxLength|Collation|NotNull|StoreAsText)Attribute : Attribute/public class \1Attribute : UnityEngine.Scripting.RequiredMemberAttribute/
+s/public class (Column|PrimaryKey|AutoIncrement|Indexed|MaxLength|Collation|NotNull|StoreAsText)Attribute : Attribute/public class \1Attribute : UnityEngine.Scripting.PreserveAttribute/
 
 # Use main thread TaskScheduler in WebGL
 s/TaskScheduler\.Default/SQLiteAsyncExtensions.TaskScheduler/

README.md

@@ -113,6 +113,6 @@ Third-party code:
 - `SQLiteConnection.Quote` is made public.
   This is useful for libraries making raw queries.
 - `SQLite3.SetDirectory` is only defined in Windows platforms.
-- Makes all column related attributes inherit `RequiredMemberAttribute`, fixing errors on columns when managed code stripping is enabled.
+- Makes all column related attributes inherit `PreserveAttribute`, fixing errors on columns when managed code stripping is enabled.
 - Changes the `TaskScheduler` used by the async API on WebGL to one that executes tasks on Unity's main thread.
 - Fix support for struct return types in queries

Runtime/sqlite-net/SQLite.cs

@@ -2454,7 +2454,7 @@ public TableAttribute (string name)
 	}
 
 	[AttributeUsage (AttributeTargets.Property)]
-	public class ColumnAttribute : Attribute
+	public class ColumnAttribute : UnityEngine.Scripting.PreserveAttribute
 	{
 		public string Name { get; set; }
 
@@ -2465,17 +2465,17 @@ public ColumnAttribute (string name)
 	}
 
 	[AttributeUsage (AttributeTargets.Property)]
-	public class PrimaryKeyAttribute : UnityEngine.Scripting.RequiredMemberAttribute
+	public class PrimaryKeyAttribute : UnityEngine.Scripting.PreserveAttribute
 	{
 	}
 
 	[AttributeUsage (AttributeTargets.Property)]
-	public class AutoIncrementAttribute : UnityEngine.Scripting.RequiredMemberAttribute
+	public class AutoIncrementAttribute : UnityEngine.Scripting.PreserveAttribute
 	{
 	}
 
 	[AttributeUsage (AttributeTargets.Property, AllowMultiple = true)]
-	public class IndexedAttribute : UnityEngine.Scripting.RequiredMemberAttribute
+	public class IndexedAttribute : UnityEngine.Scripting.PreserveAttribute
 	{
 		public string Name { get; set; }
 		public int Order { get; set; }
@@ -2507,7 +2507,7 @@ public override bool Unique {
 	}
 
 	[AttributeUsage (AttributeTargets.Property)]
-	public class MaxLengthAttribute : UnityEngine.Scripting.RequiredMemberAttribute
+	public class MaxLengthAttribute : UnityEngine.Scripting.PreserveAttribute
 	{
 		public int Value { get; private set; }
 
@@ -2529,7 +2529,7 @@ public sealed class PreserveAttribute : System.Attribute
 	/// "BINARY" is the default.
 	/// </summary>
 	[AttributeUsage (AttributeTargets.Property)]
-	public class CollationAttribute : UnityEngine.Scripting.RequiredMemberAttribute
+	public class CollationAttribute : UnityEngine.Scripting.PreserveAttribute
 	{
 		public string Value { get; private set; }
 
@@ -2540,12 +2540,12 @@ public CollationAttribute (string collation)
 	}
 
 	[AttributeUsage (AttributeTargets.Property)]
-	public class NotNullAttribute : UnityEngine.Scripting.RequiredMemberAttribute
+	public class NotNullAttribute : UnityEngine.Scripting.PreserveAttribute
 	{
 	}
 
 	[AttributeUsage (AttributeTargets.Enum)]
-	public class StoreAsTextAttribute : UnityEngine.Scripting.RequiredMemberAttribute
+	public class StoreAsTextAttribute : UnityEngine.Scripting.PreserveAttribute
 	{
 	}