diff options
Diffstat (limited to 'compiler/rustc_middle/src/query/mod.rs')
| -rw-r--r-- | compiler/rustc_middle/src/query/mod.rs | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/compiler/rustc_middle/src/query/mod.rs b/compiler/rustc_middle/src/query/mod.rs index d5c2b6de4ae..ae8c8259be4 100644 --- a/compiler/rustc_middle/src/query/mod.rs +++ b/compiler/rustc_middle/src/query/mod.rs @@ -112,7 +112,7 @@ use crate::middle::exported_symbols::{ExportedSymbol, SymbolExportInfo}; use crate::middle::lib_features::LibFeatures; use crate::middle::privacy::EffectiveVisibilities; use crate::middle::resolve_bound_vars::{ObjectLifetimeDefault, ResolveBoundVars, ResolvedArg}; -use crate::middle::stability::{self, DeprecationEntry}; +use crate::middle::stability::DeprecationEntry; use crate::mir::interpret::{ EvalStaticInitializerRawResult, EvalToAllocationRawResult, EvalToConstValueResult, EvalToValTreeResult, GlobalId, LitToConstInput, @@ -2171,6 +2171,18 @@ rustc_queries! { separate_provide_extern arena_cache } + /// Mapping from feature name to feature name based on the `implied_by` field of `#[unstable]` + /// attributes. If a `#[unstable(feature = "implier", implied_by = "impliee")]` attribute + /// exists, then this map will have a `impliee -> implier` entry. + /// + /// This mapping is necessary unless both the `#[stable]` and `#[unstable]` attributes should + /// specify their implications (both `implies` and `implied_by`). If only one of the two + /// attributes do (as in the current implementation, `implied_by` in `#[unstable]`), then this + /// mapping is necessary for diagnostics. When a "unnecessary feature attribute" error is + /// reported, only the `#[stable]` attribute information is available, so the map is necessary + /// to know that the feature implies another feature. If it were reversed, and the `#[stable]` + /// attribute had an `implies` meta item, then a map would be necessary when avoiding a "use of + /// unstable feature" error for a feature that was implied. query stability_implications(_: CrateNum) -> &'tcx UnordMap<Symbol, Symbol> { arena_cache desc { "calculating the implications between `#[unstable]` features defined in a crate" } @@ -2277,11 +2289,6 @@ rustc_queries! { desc { "fetching potentially unused trait imports" } } - query stability_index(_: ()) -> &'tcx stability::Index { - arena_cache - eval_always - desc { "calculating the stability index for the local crate" } - } /// All available crates in the graph, including those that should not be user-facing /// (such as private crates). query crates(_: ()) -> &'tcx [CrateNum] { |