From 75f2584bf40747565757be9bdc4baacd33cbac06 Mon Sep 17 00:00:00 2001
From: Ukendio <ukendio@gmail.com>
Date: Thu, 27 Mar 2025 05:08:38 +0100
Subject: [PATCH] Clear ID will remove ID from all entities

---
 jecs.luau       | 16 ++++++++++++++++
 test/tests.luau | 27 +++++++++++++++++++++++++++
 text.txt        |  0
 3 files changed, 43 insertions(+)
 create mode 100644 text.txt

diff --git a/jecs.luau b/jecs.luau
index 7f5de89..69a4ad7 100644
--- a/jecs.luau
+++ b/jecs.luau
@@ -1073,6 +1073,22 @@ local function world_clear(world: ecs_world_t, entity: i53)
 	local archetype = record.archetype
 	local row = record.row
 
+	local idr = world.component_index[entity]
+	if idr then
+		local count = 0
+		local queue = {}
+		for archetype_id in idr.cache do
+			local idr_archetype = world.archetypes[archetype_id]
+			local entities = idr_archetype.entities
+			local n = #entities
+			count += n
+			table.move(entities, 1, n, #queue + 1, queue)
+		end
+		for _, e in queue do
+			world_remove(world, e, entity)
+		end
+	end
+
 	if archetype then
 		-- In the future should have a destruct mode for
 		-- deleting archetypes themselves. Maybe requires recycling
diff --git a/test/tests.luau b/test/tests.luau
index 0e686df..7e4d6fa 100644
--- a/test/tests.luau
+++ b/test/tests.luau
@@ -1093,6 +1093,33 @@ TEST("world:children", function()
 end)
 
 TEST("world:clear()", function()
+	do
+			CASE("should remove its components")
+			local world = jecs.World.new() :: World
+			local A = world:component()
+			local B = world:component()
+			local C = world:component()
+			local D = world:component()
+
+			local e = world:entity()
+			local e1 = world:entity()
+			local e2 = world:entity()
+
+			world:set(e, A, true)
+			world:set(e, B, true)
+
+			world:set(e1, A, true)
+			world:set(e1, B, true)
+
+			CHECK(world:get(e, A))
+			CHECK(world:get(e, B))
+
+			world:clear(A)
+			CHECK(world:get(e, A) == nil)
+			CHECK(world:get(e, B))
+			CHECK(world:get(e1, A) == nil)
+			CHECK(world:get(e1, B))
+		end
 	do
 		CASE("should remove its components")
 		local world = jecs.World.new() :: World
diff --git a/text.txt b/text.txt
new file mode 100644
index 0000000..e69de29