Skip to content

Implement clone_from for State #90535

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Nov 20, 2021
+14 −1
Merged

Implement clone_from for State #90535

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
15 changes: 14 additions & 1 deletion compiler/rustc_const_eval/src/transform/check_consts/resolver.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -256,7 +256,7 @@ where
}
}

#[derive(Clone, Debug, PartialEq, Eq)]
#[derive(Debug, PartialEq, Eq)]
pub(super) struct State {
/// Describes whether a local contains qualif.
pub qualif: BitSet<Local>,
Expand All @@ -265,6 +265,19 @@ pub(super) struct State {
pub borrow: BitSet<Local>,
}

impl Clone for State {
fn clone(&self) -> Self {
State { qualif: self.qualif.clone(), borrow: self.borrow.clone() }
}

// Data flow engine when possible uses `clone_from` for domain values.
// Providing an implementation will avoid some intermediate memory allocations.
fn clone_from(&mut self, other: &Self) {
self.qualif.clone_from(&other.qualif);
self.borrow.clone_from(&other.borrow);
}
}

impl State {
#[inline]
pub(super) fn contains(&self, local: Local) -> bool {
Expand Down