qmi 0.3.1

An extension of HECS that adds easy entity saving using Persy.
Documentation 
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use hecs::{ComponentError, NoSuchEntity};
use persy::{
    BeginTransactionError, CreateIndexError, GenericError, IndexPutError, OpenError, PE,
    PrepareError,
};
use thiserror::Error;

#[derive(Debug, Error)]
pub enum QmiError {
    #[error("Failed to open or create database: {0}")]
    Database(#[from] PE<OpenError>),
    #[error("Entity does not exist: {0}")]
    NoSuchEntity(#[from] NoSuchEntity),
    #[error("Component invalid: {0}")]
    ComponentError(#[from] ComponentError),
    #[error("Could not begin transaction: {0}")]
    DbTransactionError(#[from] PE<BeginTransactionError>),
    #[error("Could not create index: {0}")]
    DbCreateIndexError(#[from] PE<CreateIndexError>),
    #[error("Expected index does not exist")]
    DbNoSuchIndex,
    #[error("Could not prepare transaction: {0}")]
    DbPrepareTxError(#[from] PE<PrepareError>),
    #[error("Could not insert into index: {0}")]
    DbIndexPutError(#[from] PE<IndexPutError>),
    #[error("Something went wrong with the database: {0}")]
    DbGenericError(#[from] PE<GenericError>),
    #[error("Serialization/Deserialization failed: {0}")]
    Postcard(#[from] postcard::Error),
    #[error("Component could not be saved")]
    ComponentSave,
}