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Assert that DB is unwind-safe, instead of proving

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Unfortunately, that `: RefUnwindSafe` bound gives rustc a hard time,
so let's remove it for know.

See

* https://github.com/rust-analyzer/rust-analyzer/issues/1283
* https://github.com/rust-lang/rust/pull/60444
* https://github.com/rust-lang/rust/issues/58291

closes #1283
This commit is contained in:
Aleksey Kladov 2019-05-18 13:04:09 +03:00
parent f7112371ee
commit fcffa6ba6b
1 changed files with 4 additions and 3 deletions
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7
crates/ra_db/src/lib.rs
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@ -15,7 +15,7 @@ pub use crate::{
},
};
pub trait CheckCanceled: panic::RefUnwindSafe {
pub trait CheckCanceled {
/// Aborts current query if there are pending changes.
///
/// rust-analyzer needs to be able to answer semantic questions about the
@ -36,14 +36,15 @@ pub trait CheckCanceled: panic::RefUnwindSafe {
Self: Sized,
F: FnOnce(&Self) -> T + panic::UnwindSafe,
{
panic::catch_unwind(|| f(self)).map_err(|err| match err.downcast::<Canceled>() {
let this = panic::AssertUnwindSafe(self);
panic::catch_unwind(|| f(*this)).map_err(|err| match err.downcast::<Canceled>() {
Ok(canceled) => *canceled,
Err(payload) => panic::resume_unwind(payload),
})
}
}
impl<T: salsa::Database + panic::RefUnwindSafe> CheckCanceled for T {
impl<T: salsa::Database> CheckCanceled for T {
fn check_canceled(&self) {
if self.salsa_runtime().is_current_revision_canceled() {
Canceled::throw()