mirror of
https://github.com/salsa-rs/salsa.git
synced 2025-01-23 05:07:27 +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.
43 lines
1 KiB
Rust
43 lines
1 KiB
Rust
//! Test that a constant `tracked` fn (has no inputs)
|
|
//! compiles and executes successfully.
|
|
#![allow(warnings)]
|
|
|
|
mod common;
|
|
|
|
use common::{ExecuteValidateLogger, LogDatabase, Logger};
|
|
use expect_test::expect;
|
|
use salsa::{Database, DatabaseImpl, Durability, Event, EventKind};
|
|
|
|
#[salsa::input]
|
|
struct MyInput {
|
|
field: u32,
|
|
}
|
|
|
|
#[salsa::tracked]
|
|
fn tracked_fn(db: &dyn Database, input: MyInput) -> u32 {
|
|
input.field(db) * 2
|
|
}
|
|
|
|
#[test]
|
|
fn execute() {
|
|
let mut db: DatabaseImpl<ExecuteValidateLogger> = Default::default();
|
|
|
|
let input = MyInput::new(&db, 22);
|
|
assert_eq!(tracked_fn(&db, input), 44);
|
|
|
|
db.assert_logs(expect![[r#"
|
|
[
|
|
"salsa_event(WillExecute { database_key: tracked_fn(0) })",
|
|
]"#]]);
|
|
|
|
// Bumps the revision
|
|
db.synthetic_write(Durability::LOW);
|
|
|
|
// Query should re-run
|
|
assert_eq!(tracked_fn(&db, input), 44);
|
|
|
|
db.assert_logs(expect![[r#"
|
|
[
|
|
"salsa_event(DidValidateMemoizedValue { database_key: tracked_fn(0) })",
|
|
]"#]]);
|
|
}
|