diff options
| -rw-r--r-- | compiler/rustc_middle/src/ty/instance.rs | 2 | ||||
| -rw-r--r-- | compiler/rustc_span/src/symbol.rs | 1 | ||||
| -rw-r--r-- | compiler/rustc_ty_utils/src/instance.rs | 84 |
3 files changed, 73 insertions, 14 deletions
diff --git a/compiler/rustc_middle/src/ty/instance.rs b/compiler/rustc_middle/src/ty/instance.rs index cc86cba6fda..6c8f4af7594 100644 --- a/compiler/rustc_middle/src/ty/instance.rs +++ b/compiler/rustc_middle/src/ty/instance.rs @@ -385,7 +385,7 @@ impl<'tcx> Instance<'tcx> { /// couldn't complete due to errors elsewhere - this is distinct /// from `Ok(None)` to avoid misleading diagnostics when an error /// has already been/will be emitted, for the original cause - #[instrument(level = "debug", skip(tcx))] + #[instrument(level = "debug", skip(tcx), ret)] pub fn resolve( tcx: TyCtxt<'tcx>, param_env: ty::ParamEnv<'tcx>, diff --git a/compiler/rustc_span/src/symbol.rs b/compiler/rustc_span/src/symbol.rs index 58015d5d502..b97ec6c684b 100644 --- a/compiler/rustc_span/src/symbol.rs +++ b/compiler/rustc_span/src/symbol.rs @@ -1207,6 +1207,7 @@ symbols! { require, residual, result, + resume, return_position_impl_trait_in_trait, return_type_notation, rhs, diff --git a/compiler/rustc_ty_utils/src/instance.rs b/compiler/rustc_ty_utils/src/instance.rs index eedf459ce8f..b10aaad5f2a 100644 --- a/compiler/rustc_ty_utils/src/instance.rs +++ b/compiler/rustc_ty_utils/src/instance.rs @@ -177,15 +177,55 @@ fn resolve_associated_item<'tcx>( Some(ty::Instance::new(leaf_def.item.def_id, substs)) } - traits::ImplSource::Generator(generator_data) => Some(Instance { - def: ty::InstanceDef::Item(generator_data.generator_def_id), - substs: generator_data.substs, - }), - traits::ImplSource::Future(future_data) => Some(Instance { - def: ty::InstanceDef::Item(future_data.generator_def_id), - substs: future_data.substs, - }), + traits::ImplSource::Generator(generator_data) => { + if cfg!(debug_assertions) && tcx.item_name(trait_item_id) != sym::resume { + // For compiler developers who'd like to add new items to `Generator`, + // you either need to generate a shim body, or perhaps return + // `InstanceDef::Item` pointing to a trait default method body if + // it is given a default implementation by the trait. + span_bug!( + tcx.def_span(generator_data.generator_def_id), + "no definition for `{trait_ref}::{}` for built-in generator type", + tcx.item_name(trait_item_id) + ) + } + Some(Instance { + def: ty::InstanceDef::Item(generator_data.generator_def_id), + substs: generator_data.substs, + }) + } + traits::ImplSource::Future(future_data) => { + if cfg!(debug_assertions) && tcx.item_name(trait_item_id) != sym::poll { + // For compiler developers who'd like to add new items to `Future`, + // you either need to generate a shim body, or perhaps return + // `InstanceDef::Item` pointing to a trait default method body if + // it is given a default implementation by the trait. + span_bug!( + tcx.def_span(future_data.generator_def_id), + "no definition for `{trait_ref}::{}` for built-in async generator type", + tcx.item_name(trait_item_id) + ) + } + Some(Instance { + def: ty::InstanceDef::Item(future_data.generator_def_id), + substs: future_data.substs, + }) + } traits::ImplSource::Closure(closure_data) => { + if cfg!(debug_assertions) + && ![sym::call, sym::call_mut, sym::call_once] + .contains(&tcx.item_name(trait_item_id)) + { + // For compiler developers who'd like to add new items to `Fn`/`FnMut`/`FnOnce`, + // you either need to generate a shim body, or perhaps return + // `InstanceDef::Item` pointing to a trait default method body if + // it is given a default implementation by the trait. + span_bug!( + tcx.def_span(closure_data.closure_def_id), + "no definition for `{trait_ref}::{}` for built-in closure type", + tcx.item_name(trait_item_id) + ) + } let trait_closure_kind = tcx.fn_trait_kind_from_def_id(trait_id).unwrap(); Instance::resolve_closure( tcx, @@ -195,11 +235,29 @@ fn resolve_associated_item<'tcx>( ) } traits::ImplSource::FnPointer(ref data) => match data.fn_ty.kind() { - ty::FnDef(..) | ty::FnPtr(..) => Some(Instance { - def: ty::InstanceDef::FnPtrShim(trait_item_id, data.fn_ty), - substs: rcvr_substs, - }), - _ => None, + ty::FnDef(..) | ty::FnPtr(..) => { + if cfg!(debug_assertions) + && ![sym::call, sym::call_mut, sym::call_once] + .contains(&tcx.item_name(trait_item_id)) + { + // For compiler developers who'd like to add new items to `Fn`/`FnMut`/`FnOnce`, + // you either need to generate a shim body, or perhaps return + // `InstanceDef::Item` pointing to a trait default method body if + // it is given a default implementation by the trait. + bug!( + "no definition for `{trait_ref}::{}` for built-in fn type", + tcx.item_name(trait_item_id) + ) + } + Some(Instance { + def: ty::InstanceDef::FnPtrShim(trait_item_id, data.fn_ty), + substs: rcvr_substs, + }) + } + _ => bug!( + "no built-in definition for `{trait_ref}::{}` for non-fn type", + tcx.item_name(trait_item_id) + ), }, traits::ImplSource::Object(ref data) => { traits::get_vtable_index_of_object_method(tcx, data, trait_item_id).map(|index| { |