1pub mod backend; 2/// 定义了一系列连接池相关的类型 3pub mod error; 4pub mod macros; 5pub mod pool; 6pub mod strategy; 7pub mod trace; 8pub mod utils; 9 10// re-exports 11pub use backend::*; 12pub use error::Error; 13pub use pool::*; 14pub use strategy::*;