diff options
| -rw-r--r-- | compiler/rustc_hir_analysis/src/collect/resolve_bound_vars.rs | 6 | ||||
| -rw-r--r-- | compiler/rustc_middle/src/ty/consts.rs | 31 |
2 files changed, 23 insertions, 14 deletions
diff --git a/compiler/rustc_hir_analysis/src/collect/resolve_bound_vars.rs b/compiler/rustc_hir_analysis/src/collect/resolve_bound_vars.rs index 97d7556a41d..8c388040fbf 100644 --- a/compiler/rustc_hir_analysis/src/collect/resolve_bound_vars.rs +++ b/compiler/rustc_hir_analysis/src/collect/resolve_bound_vars.rs @@ -1364,11 +1364,7 @@ impl<'a, 'tcx> BoundVarContext<'a, 'tcx> { return; } - span_bug!( - self.tcx.hir().span(hir_id), - "could not resolve {param_def_id:?}, scopes: {:#?}", - self.scope - ); + span_bug!(self.tcx.hir().span(hir_id), "could not resolve {param_def_id:?}",); } #[instrument(level = "debug", skip(self))] diff --git a/compiler/rustc_middle/src/ty/consts.rs b/compiler/rustc_middle/src/ty/consts.rs index 3ad56e8f273..79807df706e 100644 --- a/compiler/rustc_middle/src/ty/consts.rs +++ b/compiler/rustc_middle/src/ty/consts.rs @@ -1,7 +1,9 @@ +use crate::middle::resolve_bound_vars as rbv; use crate::mir::interpret::LitToConstInput; use crate::ty::{self, DefIdTree, InternalSubsts, ParamEnv, ParamEnvAnd, Ty, TyCtxt}; use rustc_data_structures::intern::Interned; use rustc_hir as hir; +use rustc_hir::def::{DefKind, Res}; use rustc_hir::def_id::{DefId, LocalDefId}; use rustc_macros::HashStable; use std::fmt; @@ -125,16 +127,27 @@ impl<'tcx> Const<'tcx> { } } - use hir::{def::DefKind::ConstParam, def::Res, ExprKind, Path, QPath}; match expr.kind { - ExprKind::Path(QPath::Resolved(_, &Path { res: Res::Def(ConstParam, def_id), .. })) => { - // Find the name and index of the const parameter by indexing the generics of - // the parent item and construct a `ParamConst`. - let item_def_id = tcx.parent(def_id); - let generics = tcx.generics_of(item_def_id); - let index = generics.param_def_id_to_index[&def_id]; - let name = tcx.item_name(def_id); - Some(tcx.mk_const(ty::ParamConst::new(index, name), ty)) + hir::ExprKind::Path(hir::QPath::Resolved( + _, + &hir::Path { res: Res::Def(DefKind::ConstParam, def_id), .. }, + )) => { + match tcx.named_bound_var(expr.hir_id) { + Some(rbv::ResolvedArg::EarlyBound(_)) => { + // Find the name and index of the const parameter by indexing the generics of + // the parent item and construct a `ParamConst`. + let item_def_id = tcx.parent(def_id); + let generics = tcx.generics_of(item_def_id); + let index = generics.param_def_id_to_index[&def_id]; + let name = tcx.item_name(def_id); + Some(tcx.mk_const(ty::ParamConst::new(index, name), ty)) + } + Some(rbv::ResolvedArg::LateBound(debruijn, index, _)) => Some(tcx.mk_const( + ty::ConstKind::Bound(debruijn, ty::BoundVar::from_u32(index)), + ty, + )), + arg => bug!("unexpected bound var resolution for {:?}: {arg:?}", expr.hir_id), + } } _ => None, } |