#105 Use Arc under thread-safe

Cargo.toml

@@ -60,6 +60,7 @@ rusqlite = []
 sqlx-mysql = []
 sqlx-postgres = []
 sqlx-sqlite = []
+thread-safe = []
 with-chrono = ["chrono"]
 with-json = ["serde_json"]
 with-rust_decimal = ["rust_decimal"]

src/types.rs

@@ -2,7 +2,11 @@
 
 use crate::{expr::*, query::*};
 use std::fmt;
-pub use std::rc::Rc as SeaRc; // in case we some day we want to use Arc instead of Rc
+
+#[cfg(feature = "thread-safe")]
+pub use std::sync::Arc as SeaRc;
+#[cfg(not(feature = "thread-safe"))]
+pub use std::rc::Rc as SeaRc;
 
 /// Identifier in query
 pub trait Iden {