salsa/tests/tracked-struct-unchanged-in-new-rev.rs

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use salsa::{Database as Db, Setter};
use test_log::test;
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#[salsa::input]
struct MyInput {
field: u32,
}
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#[salsa::tracked]
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struct MyTracked<'db> {
field: u32,
}
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#[salsa::tracked]
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fn tracked_fn(db: &dyn Db, input: MyInput) -> MyTracked<'_> {
MyTracked::new(db, input.field(db) / 2)
}
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#[salsa::db]
#[derive(Default)]
struct Database {
storage: salsa::Storage<Self>,
}
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#[salsa::db]
impl salsa::Database for Database {}
#[test]
fn execute() {
let mut db = Database::default();
let input1 = MyInput::new(&db, 22);
let input2 = MyInput::new(&db, 44);
let _tracked1 = tracked_fn(&db, input1);
let _tracked2 = tracked_fn(&db, input2);
// modify the input and change the revision
input1.set_field(&mut db).to(24);
let tracked2 = tracked_fn(&db, input2);
// this should not panic
tracked2.field(&db);
}