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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.
16 lines
271 B
Rust
16 lines
271 B
Rust
use salsa::prelude::*;
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mod a {
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#[salsa::input]
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pub struct MyInput {
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field: u32,
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}
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}
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fn main() {
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let mut db = salsa::DatabaseImpl::new();
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let input = a::MyInput::new(&mut db, 22);
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input.field(&db);
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input.set_field(&mut db).to(23);
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}
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