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use hecs::Entity;
use thiserror::*;
use crate::SystemName;
#[doc(hidden)]
pub type Result<T> = std::result::Result<T, Error>;
#[derive(Debug, Error)]
pub enum Error {
#[error("Attempt to execute query: {query:?} on incompatible subworld: {subworld:?}")]
#[doc(hidden)]
IncompatibleSubworld {
subworld: &'static str,
query: &'static str,
},
#[error("Entity: {0:?} does not exist in world")]
#[doc(hidden)]
NoSuchEntity(hecs::Entity),
#[error("The entity {0:?} did not have the desired component {1:?}")]
#[doc(hidden)]
MissingComponent(Entity, #[source] hecs::MissingComponent),
#[error("Query for entity {0:?} did not satisfy {1:?}")]
#[doc(hidden)]
UnsatisfiedQuery(Entity, &'static str),
#[error("Context does not have data of type {0:?}")]
#[doc(hidden)]
MissingData(&'static str),
#[error("Data of type {0:?} is already mutable borrowed")]
#[doc(hidden)]
Borrow(&'static str),
#[error("Data of type {0:?} is already borrowed")]
#[doc(hidden)]
BorrowMut(&'static str),
#[error("Failed to execute system {0:#?}")]
#[doc(hidden)]
SystemError(SystemName, #[source] anyhow::Error),
}