Add ruleset-specific checker

osu.Game.Rulesets.Osu/Edit/OsuChecker.cs

@@ -0,0 +1,30 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System.Collections.Generic;
+using System.Linq;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Osu.Edit.Checks;
+using osu.Game.Screens.Edit.Verify.Components;
+
+namespace osu.Game.Rulesets.Osu.Edit
+{
+    public class OsuChecker : Checker
+    {
+        public readonly List<BeatmapCheck> beatmapChecks = new List<BeatmapCheck>
+        {
+            new CheckConsecutiveCircles()
+        };
+
+        public override IEnumerable<Issue> Run(IBeatmap beatmap)
+        {
+            // Also run mode-invariant checks.
+            foreach (var issue in base.Run(beatmap))
+                yield return issue;
+
+            foreach (var issue in beatmapChecks.SelectMany(check => check.Run(beatmap)))
+                yield return issue;
+        }
+    }
+}

osu.Game.Rulesets.Osu/OsuRuleset.cs

@@ -206,6 +206,8 @@ public override IEnumerable<Mod> GetModsFor(ModType type)
 
         public override HitObjectComposer CreateHitObjectComposer() => new OsuHitObjectComposer(this);
 
+        public override Checker CreateChecker() => new OsuChecker();
+
         public override string Description => "osu!";
 
         public override string ShortName => SHORT_NAME;

osu.Game/Rulesets/Ruleset.cs

@@ -202,6 +202,8 @@ public PerformanceCalculator CreatePerformanceCalculator(WorkingBeatmap beatmap,
 
         public virtual HitObjectComposer CreateHitObjectComposer() => null;
 
+        public virtual Checker CreateChecker() => null;
+
         public virtual Drawable CreateIcon() => new SpriteIcon { Icon = FontAwesome.Solid.QuestionCircle };
 
         public virtual IResourceStore<byte[]> CreateResourceStore() => new NamespacedResourceStore<byte[]>(new DllResourceStore(GetType().Assembly), @"Resources");