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Deduplicate impls in impls_for_trait

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This was duplicating impls in dependencies a lot...
This commit is contained in:
Florian Diebold 2019-05-07 12:09:57 +02:00
parent 880ef25a9e
commit 530b3047ed
1 changed files with 3 additions and 2 deletions
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5
crates/ra_hir/src/ty/traits.rs
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@ -1,6 +1,7 @@
//! Trait solving using Chalk.
use std::sync::{Arc, Mutex};
use rustc_hash::FxHashSet;
use log::debug;
use chalk_ir::cast::Cast;
@ -31,7 +32,7 @@ pub(crate) fn impls_for_trait(
krate: Crate,
trait_: Trait,
) -> Arc<[ImplBlock]> {
let mut impls = Vec::new();
let mut impls = FxHashSet::default();
// We call the query recursively here. On the one hand, this means we can
// reuse results from queries for different crates; on the other hand, this
// will only ever get called for a few crates near the root of the tree (the
@ -42,7 +43,7 @@ pub(crate) fn impls_for_trait(
}
let crate_impl_blocks = db.impls_in_crate(krate);
impls.extend(crate_impl_blocks.lookup_impl_blocks_for_trait(&trait_));
impls.into()
impls.into_iter().collect::<Vec<_>>().into()
}
fn solve(