diff options
Diffstat (limited to 'compiler/rustc_next_trait_solver/src/solve/mod.rs')
| -rw-r--r-- | compiler/rustc_next_trait_solver/src/solve/mod.rs | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/compiler/rustc_next_trait_solver/src/solve/mod.rs b/compiler/rustc_next_trait_solver/src/solve/mod.rs index db3460c4ff6..cd27c9c26c1 100644 --- a/compiler/rustc_next_trait_solver/src/solve/mod.rs +++ b/compiler/rustc_next_trait_solver/src/solve/mod.rs @@ -24,7 +24,7 @@ mod trait_goals; use derive_where::derive_where; use rustc_type_ir::inherent::*; pub use rustc_type_ir::solve::*; -use rustc_type_ir::{self as ty, Interner, TypingMode}; +use rustc_type_ir::{self as ty, Interner, TyVid, TypingMode}; use tracing::instrument; pub use self::eval_ctxt::{ @@ -418,11 +418,6 @@ pub struct GoalEvaluation<I: Interner> { pub has_changed: HasChanged, /// If the [`Certainty`] was `Maybe`, then keep track of whether the goal has changed /// before rerunning it. - /// - /// We knowingly ignore the `sub_root` of our inference variables here. This means we - /// may not reevaluate a goal even though a change to the `sub_root` could cause a goal - /// to make progress. Tracking them adds additional complexity for an incredibly minor - /// type inference improvement. We could look into properly handling this in the future. pub stalled_on: Option<GoalStalledOn<I>>, } @@ -431,6 +426,7 @@ pub struct GoalEvaluation<I: Interner> { pub struct GoalStalledOn<I: Interner> { pub num_opaques: usize, pub stalled_vars: Vec<I::GenericArg>, + pub sub_roots: Vec<TyVid>, /// The cause that will be returned on subsequent evaluations if this goal remains stalled. pub stalled_cause: MaybeCause, } |