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Update API docs for Commands::get_or_spawn
to inform the user about invalid returned values (#6117)
# Objective As explained by #5960, `Commands::get_or_spawn` may return a dangling `EntityCommands` that references a non-existing entities. As explained in [this comment], it may be undesirable to make the method return an `Option`. - Addresses #5960 - Alternative to #5961 ## Solution This PR adds a doc comment to the method to inform the user that the returned `EntityCommands` is not guaranteed to be valid. It also adds panic doc comments on appropriate `EntityCommands` methods. [this comment]: https://github.com/bevyengine/bevy/pull/5961#issuecomment-1259870849
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@ -168,6 +168,9 @@ impl<'w, 's> Commands<'w, 's> {
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/// Pushes a [`Command`] to the queue for creating a new [`Entity`] if the given one does not exists,
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/// and returns its corresponding [`EntityCommands`].
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///
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/// This method silently fails by returning `EntityCommands`
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/// even if the given `Entity` cannot be spawned.
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///
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/// See [`World::get_or_spawn`] for more details.
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///
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/// # Note
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@ -562,6 +565,10 @@ impl<'w, 's, 'a> EntityCommands<'w, 's, 'a> {
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/// Adds a [`Bundle`] of components to the entity.
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///
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/// # Panics
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///
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/// The command will panic when applied if the associated entity does not exist.
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///
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/// # Example
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///
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/// ```
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@ -683,6 +690,10 @@ impl<'w, 's, 'a> EntityCommands<'w, 's, 'a> {
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///
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/// See [`World::despawn`] for more details.
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///
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/// # Panics
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///
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/// The command will panic when applied if the associated entity does not exist.
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///
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/// # Example
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///
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/// ```
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@ -707,6 +718,10 @@ impl<'w, 's, 'a> EntityCommands<'w, 's, 'a> {
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}
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/// Logs the components of the entity at the info level.
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///
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/// # Panics
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///
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/// The command will panic when applied if the associated entity does not exist.
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pub fn log_components(&mut self) {
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self.commands.add(LogComponents {
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entity: self.entity,
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