src/librustc/ty/query/mod.rs

   1 use crate::dep_graph::{self, DepNode};
   2 use crate::hir::def_id::{CrateNum, DefId, DefIndex};
   3 use crate::hir::def::{DefKind, Export};
   4 use crate::hir::{self, TraitCandidate, ItemLocalId, CodegenFnAttrs};
   5 use crate::infer::canonical::{self, Canonical};
   6 use crate::lint;
   7 use crate::middle::cstore::{ExternCrate, LinkagePreference, NativeLibrary, ForeignModule};
   8 use crate::middle::cstore::{NativeLibraryKind, DepKind, CrateSource};
   9 use crate::middle::privacy::AccessLevels;
  10 use crate::middle::reachable::ReachableSet;
  11 use crate::middle::region;
  12 use crate::middle::resolve_lifetime::{ResolveLifetimes, Region, ObjectLifetimeDefault};
  13 use crate::middle::stability::{self, DeprecationEntry};
  14 use crate::middle::lib_features::LibFeatures;
  15 use crate::middle::lang_items::{LanguageItems, LangItem};
  16 use crate::middle::exported_symbols::{SymbolExportLevel, ExportedSymbol};
  17 use crate::mir::interpret::{ConstEvalRawResult, ConstEvalResult};
  18 use crate::mir::mono::CodegenUnit;
  19 use crate::mir;
  20 use crate::mir::interpret::GlobalId;
  21 use crate::session::CrateDisambiguator;
  22 use crate::session::config::{EntryFnType, OutputFilenames, OptLevel, SymbolManglingVersion};
  23 use crate::traits::{self, Vtable};
  24 use crate::traits::query::{
  25     CanonicalPredicateGoal, CanonicalProjectionGoal,
  26     CanonicalTyGoal, CanonicalTypeOpAscribeUserTypeGoal,
  27     CanonicalTypeOpEqGoal, CanonicalTypeOpSubtypeGoal, CanonicalTypeOpProvePredicateGoal,
  28     CanonicalTypeOpNormalizeGoal, NoSolution,
  29 };
  30 use crate::traits::query::method_autoderef::MethodAutoderefStepsResult;
  31 use crate::traits::query::dropck_outlives::{DtorckConstraint, DropckOutlivesResult};
  32 use crate::traits::query::normalize::NormalizationResult;
  33 use crate::traits::query::outlives_bounds::OutlivesBound;
  34 use crate::traits::specialization_graph;
  35 use crate::traits::Clauses;
  36 use crate::ty::{self, CrateInherentImpls, ParamEnvAnd, Ty, TyCtxt, AdtSizedConstraint};
  37 use crate::ty::steal::Steal;
  38 use crate::ty::util::NeedsDrop;
  39 use crate::ty::subst::SubstsRef;
  40 use crate::util::nodemap::{DefIdSet, DefIdMap};
  41 use crate::util::common::ErrorReported;
  42 use rustc_data_structures::profiling::ProfileCategory::*;
  43
  44 use rustc_data_structures::svh::Svh;
  45 use rustc_index::vec::IndexVec;
  46 use rustc_data_structures::fx::{FxIndexMap, FxHashMap, FxHashSet};
  47 use rustc_data_structures::stable_hasher::StableVec;
  48 use rustc_data_structures::sync::Lrc;
  49 use rustc_data_structures::fingerprint::Fingerprint;
  50 use rustc_target::spec::PanicStrategy;
  51
  52 use std::borrow::Cow;
  53 use std::ops::Deref;
  54 use std::sync::Arc;
  55 use std::any::type_name;
  56 use syntax_pos::{Span, DUMMY_SP};
  57 use syntax::attr;
  58 use syntax::ast;
  59 use syntax::feature_gate;
  60 use syntax::symbol::Symbol;
  61
  62 #[macro_use]
  63 mod plumbing;
  64 use self::plumbing::*;
  65 pub use self::plumbing::{force_from_dep_node, CycleError};
  66
  67 mod job;
  68 pub use self::job::{QueryJob, QueryInfo};
  69 #[cfg(parallel_compiler)]
  70 pub use self::job::handle_deadlock;
  71
  72 mod keys;
  73 use self::keys::Key;
  74
  75 mod values;
  76 use self::values::Value;
  77
  78 mod config;
  79 pub(crate) use self::config::QueryDescription;
  80 pub use self::config::QueryConfig;
  81 use self::config::QueryAccessors;
  82
  83 mod on_disk_cache;
  84 pub use self::on_disk_cache::OnDiskCache;
  85
  86 // Each of these queries corresponds to a function pointer field in the
  87 // `Providers` struct for requesting a value of that type, and a method
  88 // on `tcx: TyCtxt` (and `tcx.at(span)`) for doing that request in a way
  89 // which memoizes and does dep-graph tracking, wrapping around the actual
  90 // `Providers` that the driver creates (using several `rustc_*` crates).
  91 //
  92 // The result type of each query must implement `Clone`, and additionally
  93 // `ty::query::values::Value`, which produces an appropriate placeholder
  94 // (error) value if the query resulted in a query cycle.
  95 // Queries marked with `fatal_cycle` do not need the latter implementation,
  96 // as they will raise an fatal error on query cycles instead.
  97
  98 rustc_query_append! { [define_queries!][ <'tcx>
  99     Other {
 100         /// Runs analysis passes on the crate.
 101         [eval_always] fn analysis: Analysis(CrateNum) -> Result<(), ErrorReported>,
 102     },
 103 ]}