mirror of https://github.com/rust-lang/rust
36 lines
972 B
Rust
36 lines
972 B
Rust
#![crate_name="foo"]
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// reduced from sqlx 0.7.3
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use std::future::Future;
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use std::pin::Pin;
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use std::ops::{Deref, DerefMut};
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pub enum Error {}
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pub trait Acquire<'c> {
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type Database: Database;
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type Connection: Deref<Target = <Self::Database as Database>::Connection> + DerefMut + Send;
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}
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pub trait Database {
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type Connection: Connection<Database = Self>;
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}
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pub trait Connection {
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type Database: Database;
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type Options: ConnectionOptions<Connection = Self>;
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fn begin(
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&mut self
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) -> Pin<Box<dyn Future<Output = Result<Transaction<'_, Self::Database>, Error>> + Send + '_>>
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where
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Self: Sized;
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}
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pub trait ConnectionOptions {
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type Connection: Connection;
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}
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pub struct Transaction<'c, DB: Database> {
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_db: &'c DB,
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}
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impl<'t, 'c, DB: Database> Acquire<'t> for &'t mut Transaction<'c, DB>
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where <DB as Database>::Connection: Send
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{
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type Database = DB;
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type Connection = &'t mut <DB as Database>::Connection;
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}
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