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.
44 lines
903 B
Rust
44 lines
903 B
Rust
//! Test a field whose `PartialEq` impl is always true.
|
|
//! This can our "last changed" data to be wrong
|
|
//! but we *should* always reflect the final values.
|
|
|
|
use salsa::{Database, Setter};
|
|
use test_log::test;
|
|
|
|
#[salsa::input]
|
|
struct MyInput {
|
|
field: bool,
|
|
}
|
|
|
|
#[derive(Hash, Debug, Clone)]
|
|
struct NotEq {
|
|
field: bool,
|
|
}
|
|
|
|
impl From<bool> for NotEq {
|
|
fn from(value: bool) -> Self {
|
|
Self { field: value }
|
|
}
|
|
}
|
|
|
|
#[salsa::tracked]
|
|
struct MyTracked<'db> {
|
|
#[no_eq]
|
|
field: NotEq,
|
|
}
|
|
|
|
#[salsa::tracked]
|
|
fn the_fn(db: &dyn Database, input: MyInput) {
|
|
let tracked0 = MyTracked::new(db, NotEq::from(input.field(db)));
|
|
assert_eq!(tracked0.field(db).field, input.field(db));
|
|
}
|
|
|
|
#[test]
|
|
fn execute() {
|
|
let mut db = salsa::DatabaseImpl::new();
|
|
|
|
let input = MyInput::new(&db, true);
|
|
the_fn(&db, input);
|
|
input.set_field(&mut db).to(false);
|
|
the_fn(&db, input);
|
|
}
|