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Prevent setting parent as itself #8980

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merged 6 commits into from
Aug 7, 2023
Merged

Prevent setting parent as itself #8980

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f045aaa
Prevent setting parent as itself
lewiszlw Jun 28, 2023
fc9560f
Apply fix to more child builder commands
lewiszlw Jun 28, 2023
f7edb55
Move checks into EntityMut
lewiszlw Jun 28, 2023
4c58a99
Add checks into EntityCommands extension methods
lewiszlw Jun 28, 2023
6de656b
Add panics doc
lewiszlw Jul 3, 2023
1814e73
Add more panics doc
lewiszlw Jul 3, 2023
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27 changes: 27 additions & 0 deletions crates/bevy_hierarchy/src/child_builder.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -346,12 +346,18 @@ impl<'w, 's, 'a> BuildChildren for EntityCommands<'w, 's, 'a> {

spawn_children(&mut builder);
let children = builder.push_children;
if children.children.contains(&parent) {
panic!("Entity cannot be a child of itself.");
}
self.commands().add(children);
self
}

fn push_children(&mut self, children: &[Entity]) -> &mut Self {
let parent = self.id();
if children.contains(&parent) {
panic!("Cannot push entity as a child of itself.");
}
self.commands().add(PushChildren {
children: SmallVec::from(children),
parent,
Expand All @@ -361,6 +367,9 @@ impl<'w, 's, 'a> BuildChildren for EntityCommands<'w, 's, 'a> {

fn insert_children(&mut self, index: usize, children: &[Entity]) -> &mut Self {
let parent = self.id();
if children.contains(&parent) {
panic!("Cannot insert entity as a child of itself.");
}
self.commands().add(InsertChildren {
children: SmallVec::from(children),
index,
Expand All @@ -380,6 +389,9 @@ impl<'w, 's, 'a> BuildChildren for EntityCommands<'w, 's, 'a> {

fn add_child(&mut self, child: Entity) -> &mut Self {
let parent = self.id();
if child == parent {
panic!("Cannot add entity as a child of itself.");
}
self.commands().add(AddChild { child, parent });
self
}
Expand All @@ -392,6 +404,9 @@ impl<'w, 's, 'a> BuildChildren for EntityCommands<'w, 's, 'a> {

fn replace_children(&mut self, children: &[Entity]) -> &mut Self {
let parent = self.id();
if children.contains(&parent) {
panic!("Cannot replace entity as a child of itself.");
}
self.commands().add(ReplaceChildren {
children: SmallVec::from(children),
parent,
Expand All @@ -401,6 +416,9 @@ impl<'w, 's, 'a> BuildChildren for EntityCommands<'w, 's, 'a> {

fn set_parent(&mut self, parent: Entity) -> &mut Self {
let child = self.id();
if child == parent {
panic!("Cannot set parent to itself");
}
self.commands().add(AddChild { child, parent });
self
}
Expand Down Expand Up @@ -511,6 +529,9 @@ impl<'w> BuildWorldChildren for EntityMut<'w> {

fn add_child(&mut self, child: Entity) -> &mut Self {
let parent = self.id();
if child == parent {
panic!("Cannot add entity as a child of itself.");
}
self.world_scope(|world| {
update_old_parent(world, child, parent);
});
Expand All @@ -525,6 +546,9 @@ impl<'w> BuildWorldChildren for EntityMut<'w> {

fn push_children(&mut self, children: &[Entity]) -> &mut Self {
let parent = self.id();
if children.contains(&parent) {
panic!("Cannot push entity as a child of itself.");
}
self.world_scope(|world| {
update_old_parents(world, parent, children);
});
Expand All @@ -541,6 +565,9 @@ impl<'w> BuildWorldChildren for EntityMut<'w> {

fn insert_children(&mut self, index: usize, children: &[Entity]) -> &mut Self {
let parent = self.id();
if children.contains(&parent) {
panic!("Cannot insert entity as a child of itself.");
}
self.world_scope(|world| {
update_old_parents(world, parent, children);
});
Expand Down