- finished the state usage parser.

- added state usage specifiers to Actor and Inventory. The states in these classes must be set to full access so that any existing mod can link to them.

src/namedef.h

@@ -736,3 +736,4 @@ xx(DamageFunction)
 xx(Length)
 xx(Unit)
 xx(StateLabel)
+xx(Overlay)

src/scripting/zscript/zcc_compile.cpp

@@ -2387,6 +2387,39 @@ void ZCCCompiler::CompileStates()
 
 		for (auto s : c->States)
 		{
+			int flags;
+			if (s->Flags != nullptr)
+			{
+				flags = 0;
+				auto p = s->Flags;
+				do
+				{
+					switch (p->Id)
+					{
+					case NAME_Actor:
+						flags |= SUF_ACTOR;
+						break;
+					case NAME_Overlay:
+						flags |= SUF_OVERLAY;
+						break;
+					case NAME_Weapon:
+						flags |= SUF_WEAPON;
+						break;
+					case NAME_Item:
+						flags |= SUF_ITEM;
+						break;
+					default:
+						Error(p, "Unknown States qualifier %s", FName(p->Id).GetChars());
+						break;
+					}
+
+					p = static_cast<decltype(p)>(p->SiblingNext);
+				} while (p != s->Flags);
+			}
+			else
+			{
+				flags = static_cast<PClassActor *>(c->Type())->DefaultStateUsage;
+			}
 			auto st = s->Body;
 			if (st != nullptr) do
 			{

wadsrc/static/zscript/actor.txt

@@ -489,7 +489,7 @@ class Actor : Thinker native
 		return ACS_ExecuteAlways(-int(script), mapnum, arg1, arg2, arg3);
 	}
 	
-	States
+	States(Actor, Overlay, Weapon, Item)
 	{
 	Spawn:
 		TNT1 A -1;

wadsrc/static/zscript/shared/inventory.txt

@@ -16,7 +16,7 @@ class Inventory : Actor native
 	private native void A_RestoreSpecialThing1();
 	private native void A_RestoreSpecialThing2();
 
-	States
+	States(Actor, Overlay, Weapon, Item)
 	{
 	HideDoomish:
 		TNT1 A 1050;