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.
39 lines
1 KiB
Rust
39 lines
1 KiB
Rust
use crate::compiler;
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use std::sync::Arc;
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#[salsa::query_group]
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pub trait ClassTableDatabase: compiler::CompilerDatabase {
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/// Get the fields.
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fn fields(&self, class: DefId) -> Arc<Vec<DefId>>;
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/// Get the list of all classes
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fn all_classes(&self) -> Arc<Vec<DefId>>;
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/// Get the list of all fields
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fn all_fields(&self) -> Arc<Vec<DefId>>;
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}
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#[derive(Copy, Clone, Debug, Hash, PartialEq, Eq)]
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pub struct DefId(usize);
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fn all_classes(_: &impl ClassTableDatabase) -> Arc<Vec<DefId>> {
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Arc::new(vec![DefId(0), DefId(10)]) // dummy impl
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}
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fn fields(_: &impl ClassTableDatabase, class: DefId) -> Arc<Vec<DefId>> {
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Arc::new(vec![DefId(class.0 + 1), DefId(class.0 + 2)]) // dummy impl
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}
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fn all_fields(db: &impl ClassTableDatabase) -> Arc<Vec<DefId>> {
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Arc::new(
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db.all_classes()
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.iter()
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.cloned()
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.flat_map(|def_id| {
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let fields = db.fields(def_id);
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(0..fields.len()).map(move |i| fields[i])
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})
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.collect(),
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)
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}
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