salsa 0.26.1

A generic framework for on-demand, incrementalized computation (experimental)
Documentation 
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#![cfg(feature = "inventory")]

//! It's possible to call a Salsa query from within a cycle initial fn.

#[salsa::tracked]
fn initial_value(_db: &dyn salsa::Database) -> u32 {
    0
}

#[salsa::tracked(cycle_initial= |db, _| initial_value(db))]
fn query(db: &dyn salsa::Database) -> u32 {
    let val = query(db);
    if val < 5 { val + 1 } else { val }
}

#[test_log::test]
fn the_test() {
    let db = salsa::DatabaseImpl::default();

    assert_eq!(query(&db), 5);
}