salsa 0.26.1

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

//! Calling back into the same cycle from your cycle initial function will trigger another cycle.

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

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

fn cycle_initial(db: &dyn salsa::Database, _id: salsa::Id) -> u32 {
    initial_value(db)
}

#[test_log::test]
#[should_panic(expected = "dependency graph cycle")]
fn the_test() {
    let db = salsa::DatabaseImpl::default();

    query(&db);
}