Module rustc_trait_selection::traits::query

Experimental types for the trait query interface. The methods defined in this module are all based on canonicalization, which makes a canonical query by replacing unbound inference variables and regions, so that results can be reused more broadly. The providers for the queries defined here can be found in rustc_traits.

Modules

• dropck_outlives
• evaluate_obligation
• method_autoderef
• normalize
  Code for the ‘normalization’ query. This consists of a wrapper which folds deeply, invoking the underlying normalize_projection_ty query when it encounters projections.
• type_op

Structs

• CandidateStep
• DropckConstraint
  A set of constraints that need to be satisfied in order for a type to be valid for destruction.
• DropckOutlivesResult
• MethodAutoderefBadTy
• MethodAutoderefStepsResult
• NoSolution
• NormalizationResult
  Result from the normalize_projection_ty query.

Enums

• OutlivesBound
  Outlives bounds are relationships between generic parameters, whether they both be regions ('a: 'b) or whether types are involved (T: 'a). These relationships can be extracted from the full set of predicates we understand or also from types (in which case they are called implied bounds). They are fed to the OutlivesEnv which in turn is supplied to the region checker and other parts of the inference system.

Type Aliases

• CanonicalPredicateGoal
• CanonicalProjectionGoal
• CanonicalTyGoal
• CanonicalTypeOpAscribeUserTypeGoal
• CanonicalTypeOpEqGoal
• CanonicalTypeOpNormalizeGoal
• CanonicalTypeOpProvePredicateGoal
• CanonicalTypeOpSubtypeGoal