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https://github.com/salsa-rs/salsa.git
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daaa78056a
Under this design, *all* databases are a `DatabaseImpl<U>`, where the `U` implements `UserData` (you can use `()` if there is none). Code would default to `&dyn salsa::Database` but if you want to give access to the userdata, you can define a custom database trait `MyDatabase: salsa::Databse` so long as you * annotate `MyDatabase` trait definition of impls of `MyDatabase` with `#[salsa::db]` * implement `MyDatabase` for `DatabaseImpl<U>` where `U` is your userdata (this could be a blanket impl, if you don't know the precise userdata type). The `tests/common/mod.rs` shows the pattern.
71 lines
1.4 KiB
Rust
71 lines
1.4 KiB
Rust
//! Test that the `constructor` macro overrides
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//! the `new` method's name and `get` and `set`
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//! change the name of the getter and setter of the fields.
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#![allow(warnings)]
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use std::fmt::Display;
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use salsa::Setter;
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#[salsa::db]
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trait Db: salsa::Database {}
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#[salsa::input(constructor = from_string)]
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struct MyInput {
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#[get(text)]
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#[set(set_text)]
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field: String,
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}
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impl MyInput {
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pub fn new(db: &mut dyn Db, s: impl Display) -> MyInput {
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MyInput::from_string(db, s.to_string())
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}
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pub fn field(self, db: &dyn Db) -> String {
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self.text(db)
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}
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pub fn set_field(self, db: &mut dyn Db, id: String) {
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self.set_text(db).to(id);
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}
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}
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#[salsa::interned(constructor = from_string)]
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struct MyInterned<'db> {
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#[get(text)]
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#[return_ref]
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field: String,
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}
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impl<'db> MyInterned<'db> {
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pub fn new(db: &'db dyn Db, s: impl Display) -> MyInterned<'db> {
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MyInterned::from_string(db, s.to_string())
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}
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pub fn field(self, db: &'db dyn Db) -> &str {
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&self.text(db)
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}
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}
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#[salsa::tracked(constructor = from_string)]
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struct MyTracked<'db> {
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#[get(text)]
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field: String,
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}
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impl<'db> MyTracked<'db> {
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pub fn new(db: &'db dyn Db, s: impl Display) -> MyTracked<'db> {
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MyTracked::from_string(db, s.to_string())
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}
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pub fn field(self, db: &'db dyn Db) -> String {
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self.text(db)
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}
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}
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#[test]
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fn execute() {
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salsa::DatabaseImpl::new();
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}
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