mirror of
https://github.com/salsa-rs/salsa.git
synced 2024-11-24 12:16:25 +00:00
daaa78056a
Under this design, *all* databases are a `DatabaseImpl<U>`, where the `U` implements `UserData` (you can use `()` if there is none). Code would default to `&dyn salsa::Database` but if you want to give access to the userdata, you can define a custom database trait `MyDatabase: salsa::Databse` so long as you * annotate `MyDatabase` trait definition of impls of `MyDatabase` with `#[salsa::db]` * implement `MyDatabase` for `DatabaseImpl<U>` where `U` is your userdata (this could be a blanket impl, if you don't know the precise userdata type). The `tests/common/mod.rs` shows the pattern.
42 lines
967 B
Rust
42 lines
967 B
Rust
//! Test that a `tracked` fn on a `salsa::input`
|
|
//! compiles and executes successfully.
|
|
#![allow(warnings)]
|
|
|
|
trait TrackedTrait {
|
|
fn tracked_trait_fn(self, db: &dyn salsa::Database) -> u32;
|
|
}
|
|
|
|
#[salsa::input]
|
|
struct MyInput {
|
|
field: u32,
|
|
}
|
|
|
|
#[salsa::tracked]
|
|
impl MyInput {
|
|
#[salsa::tracked]
|
|
fn tracked_fn(self, db: &dyn salsa::Database) -> u32 {
|
|
self.field(db) * 2
|
|
}
|
|
|
|
#[salsa::tracked(return_ref)]
|
|
fn tracked_fn_ref(self, db: &dyn salsa::Database) -> u32 {
|
|
self.field(db) * 3
|
|
}
|
|
}
|
|
|
|
#[salsa::tracked]
|
|
impl TrackedTrait for MyInput {
|
|
#[salsa::tracked]
|
|
fn tracked_trait_fn(self, db: &dyn salsa::Database) -> u32 {
|
|
self.field(db) * 4
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn execute() {
|
|
let mut db = salsa::DatabaseImpl::new();
|
|
let object = MyInput::new(&mut db, 22);
|
|
// assert_eq!(object.tracked_fn(&db), 44);
|
|
// assert_eq!(*object.tracked_fn_ref(&db), 66);
|
|
assert_eq!(object.tracked_trait_fn(&db), 88);
|
|
}
|