introduce 'Valued' trait, which is almost Buildable without being buildable.

OpenRA.Game/Chrome.cs

@@ -119,7 +119,7 @@ namespace OpenRA
 			var actor = world.FindUnitsAtMouse(lastMousePos).FirstOrDefault();
 			if (actor == null) return;
 
-			var text = actor.Info.Traits.Contains<BuildableInfo>() ? actor.Info.Traits.Get<BuildableInfo>().Description : actor.Info.Name;
+			var text = actor.Info.Traits.Contains<ValuedInfo>() ? actor.Info.Traits.Get<ValuedInfo>().Description : actor.Info.Name;
 			var text2 = (actor.Owner == world.LocalPlayer)
 				? "" : (actor.Owner == world.NeutralPlayer ? "{0}" : "{0} ({1})").F(actor.Owner.PlayerName, world.LocalPlayer.Stances[actor.Owner]);
 

OpenRA.Game/Traits/AI/EmitInfantryOnSell.cs

@@ -21,13 +21,13 @@ namespace OpenRA.Traits.AI
 		{
 			var info = self.Info.Traits.Get<EmitInfantryOnSellInfo>();
 			var csv = self.Info.Traits.GetOrDefault<CustomSellValueInfo>();
-			var cost = csv != null ? csv.Value : self.Info.Traits.Get<BuildableInfo>().Cost;
+			var cost = csv != null ? csv.Value : self.Info.Traits.Get<ValuedInfo>().Cost;
 			var hp = self.Info.Traits.Get<OwnedActorInfo>().HP;
 			var hpFraction = Math.Max(info.MinHpFraction, hp / self.GetMaxHP());
 			var dudesValue = (int)(hpFraction * info.ValueFraction * cost);
 			var eligibleLocations = Footprint.Tiles(self).ToList();
 			// todo: fix this for unbuildables in ActorTypes, like civilians.
-			var actorTypes = info.ActorTypes.Select(a => new { Name = a, Cost = Rules.Info[a].Traits.Get<BuildableInfo>().Cost }).ToArray();
+			var actorTypes = info.ActorTypes.Select(a => new { Name = a, Cost = Rules.Info[a].Traits.Get<ValuedInfo>().Cost }).ToArray();
 
 			while (eligibleLocations.Count > 0 && actorTypes.Any(a => a.Cost <= dudesValue))
 			{

OpenRA.Game/Traits/Activities/Repair.cs

@@ -39,7 +39,7 @@ namespace OpenRA.Traits.Activities
 				var hostBuilding = self.World.FindUnits(self.CenterLocation, self.CenterLocation)
 					.FirstOrDefault(a => a.traits.Contains<RenderBuilding>());
 				
-				var unitCost = self.Info.Traits.Get<BuildableInfo>().Cost;
+				var unitCost = self.Info.Traits.Get<ValuedInfo>().Cost;
 				var hp = self.Info.Traits.Get<OwnedActorInfo>().HP;
 
 				var costPerHp = (hostBuilding.Info.Traits.Get<RepairsUnitsInfo>().URepairPercent * unitCost) / hp;

OpenRA.Game/Traits/Activities/Sell.cs

@@ -31,7 +31,7 @@ namespace OpenRA.Traits.Activities
 		void DoSell(Actor self)
 		{
 			var csv = self.Info.Traits.GetOrDefault<CustomSellValueInfo>();
-			var cost = csv != null ? csv.Value : self.Info.Traits.Get<BuildableInfo>().Cost;
+			var cost = csv != null ? csv.Value : self.Info.Traits.Get<ValuedInfo>().Cost;
 			var hp = self.Info.Traits.Get<OwnedActorInfo>().HP;
 			var refund = self.World.Defaults.RefundPercent * self.Health * cost / hp;
 

OpenRA.Game/Traits/Buildable.cs

@@ -20,19 +20,29 @@
 
 namespace OpenRA.Traits
 {
-	class BuildableInfo : TraitInfo<Buildable>
+	class ValuedInfo : ITraitInfo
+	{
+		public readonly int Cost = 0;
+		public readonly string Description = "";
+		public readonly string LongDesc = "";
+
+		public virtual object Create(Actor self) { return new Valued(); }
+	}
+
+	class BuildableInfo : ValuedInfo
 	{
 		public readonly int TechLevel = -1;
 		public readonly string[] Prerequisites = { };
 		public readonly string[] BuiltAt = { };
 		public readonly string[] Owner = { };
-		public readonly int Cost = 0;
+		
-		public readonly string Description = "";
-		public readonly string LongDesc = "";
 		public readonly string Icon = null;
 		public readonly string[] AlternateName = { };
 		public readonly int BuildPaletteOrder = 50;
+
+		public override object Create(Actor self) { return new Buildable(); }
 	}
 
+	class Valued { }		/* halfway to buildable */
 	class Buildable { }
 }

mods/ra/infantry.yaml

@@ -209,6 +209,9 @@ C1:
 	Selectable:
 		Voice: CivilianMaleVoice
 		Bounds: 12,17,0,-9
+	Valued:
+		Cost: 70
+		Description: Technician
 	Unit:
 		HP: 20
 		Sight: 2
@@ -221,6 +224,9 @@ C2:
 	Selectable:
 		Voice: CivilianFemaleVoice
 		Bounds: 12,17,0,-9
+	Valued:
+		Cost: 70
+		Description: Technician
 	Unit:
 		HP: 20
 		Sight: 2