24 lines
917 B
Rust
24 lines
917 B
Rust
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use super::EvalCtxt;
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use rustc_middle::traits::solve::{Certainty, Goal, QueryResult};
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use rustc_middle::ty::{self, ProjectionPredicate};
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impl<'tcx> EvalCtxt<'_, 'tcx> {
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#[instrument(level = "debug", skip(self), ret)]
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pub(super) fn compute_projection_goal(
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&mut self,
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goal: Goal<'tcx, ProjectionPredicate<'tcx>>,
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) -> QueryResult<'tcx> {
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match goal.predicate.term.unpack() {
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ty::TermKind::Ty(term) => {
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let alias = goal.predicate.projection_ty.to_ty(self.tcx());
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self.eq(goal.param_env, alias, term)?;
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self.evaluate_added_goals_and_make_canonical_response(Certainty::Yes)
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}
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// FIXME(associated_const_equality): actually do something here.
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ty::TermKind::Const(_) => {
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self.evaluate_added_goals_and_make_canonical_response(Certainty::Yes)
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}
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}
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}
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}
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