mirror of
https://github.com/salsa-rs/salsa.git
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93c30a953d
Switch to a procedural implementation of the `query_group!` macro,
residing in the `components/salsa_macros` subcrate.
Allow the user to override the invoked function via `salsa::invoke(...)`
and the name of the generated query type via `salsa::query_type(...)`.
In all tests, replace the `salsa::query_group! { ... }` invocations with
the new attribute-style `#[salsa::query_group]` macro, and change them
to the new naming scheme for query types (`...Query`).
Update README, examples, and documentation.
62 lines
1.8 KiB
Rust
62 lines
1.8 KiB
Rust
use crate::implementation::{TestContext, TestContextImpl};
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use salsa::Database;
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#[salsa::query_group]
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pub(crate) trait MemoizedDepInputsContext: TestContext {
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fn dep_memoized2(&self) -> usize;
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fn dep_memoized1(&self) -> usize;
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#[salsa::dependencies]
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fn dep_derived1(&self) -> usize;
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#[salsa::input]
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fn dep_input1(&self) -> usize;
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#[salsa::input]
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fn dep_input2(&self) -> usize;
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}
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fn dep_memoized2(db: &impl MemoizedDepInputsContext) -> usize {
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db.log().add("Memoized2 invoked");
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db.dep_memoized1()
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}
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fn dep_memoized1(db: &impl MemoizedDepInputsContext) -> usize {
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db.log().add("Memoized1 invoked");
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db.dep_derived1() * 2
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}
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fn dep_derived1(db: &impl MemoizedDepInputsContext) -> usize {
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db.log().add("Derived1 invoked");
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db.dep_input1() / 2
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}
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#[test]
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fn revalidate() {
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let db = &mut TestContextImpl::default();
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db.query_mut(DepInput1Query).set((), 0);
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// Initial run starts from Memoized2:
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let v = db.dep_memoized2();
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assert_eq!(v, 0);
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db.assert_log(&["Memoized2 invoked", "Memoized1 invoked", "Derived1 invoked"]);
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// After that, we first try to validate Memoized1 but wind up
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// running Memoized2. Note that we don't try to validate
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// Derived1, so it is invoked by Memoized1.
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db.query_mut(DepInput1Query).set((), 44);
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let v = db.dep_memoized2();
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assert_eq!(v, 44);
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db.assert_log(&["Memoized1 invoked", "Derived1 invoked", "Memoized2 invoked"]);
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// Here validation of Memoized1 succeeds so Memoized2 never runs.
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db.query_mut(DepInput1Query).set((), 45);
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let v = db.dep_memoized2();
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assert_eq!(v, 44);
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db.assert_log(&["Memoized1 invoked", "Derived1 invoked"]);
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// Here, a change to input2 doesn't affect us, so nothing runs.
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db.query_mut(DepInput2Query).set((), 45);
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let v = db.dep_memoized2();
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assert_eq!(v, 44);
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db.assert_log(&[]);
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}
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