Struct rustc::middle::infer::InferCtxtUnstable
[-] [+]
[src]
pub struct InferCtxt<'a, 'tcx> { pub tcx: &'a ctxt<'tcx>, // some fields omitted }
Fields
tcx |
Methods
impl<'a, 'tcx> InferCtxt<'a, 'tcx>
fn freshen<T: TypeFoldable<'tcx>>(&self, t: T) -> T
fn type_var_diverges(&'a self, ty: Ty) -> bool
fn freshener<'b>(&'b self) -> TypeFreshener<'b, 'tcx>
fn type_is_unconstrained_numeric(&'a self, ty: Ty) -> UnconstrainedNumeric
fn equate(&'a self, a_is_expected: bool, trace: TypeTrace<'tcx>) -> Equate<'a, 'tcx>
fn sub(&'a self, a_is_expected: bool, trace: TypeTrace<'tcx>) -> Sub<'a, 'tcx>
fn lub(&'a self, a_is_expected: bool, trace: TypeTrace<'tcx>) -> Lub<'a, 'tcx>
fn glb(&'a self, a_is_expected: bool, trace: TypeTrace<'tcx>) -> Glb<'a, 'tcx>
fn commit_unconditionally<R, F>(&self, f: F) -> R where F: FnOnce() -> R
Execute f
and commit the bindings
fn commit_if_ok<T, E, F>(&self, f: F) -> Result<T, E> where F: FnOnce(&CombinedSnapshot) -> Result<T, E>
Execute f
and commit the bindings if closure f
returns Ok(_)
fn commit_regions_if_ok<T, E, F>(&self, f: F) -> Result<T, E> where F: FnOnce() -> Result<T, E>
Execute f
and commit only the region bindings if successful.
The function f must be very careful not to leak any non-region
variables that get created.
fn probe<R, F>(&self, f: F) -> R where F: FnOnce(&CombinedSnapshot) -> R
Execute f
then unroll any bindings it creates
fn add_given(&self, sub: FreeRegion, sup: RegionVid)
fn sub_types(&self, a_is_expected: bool, origin: TypeOrigin, a: Ty<'tcx>, b: Ty<'tcx>) -> UnitResult<'tcx>
fn eq_types(&self, a_is_expected: bool, origin: TypeOrigin, a: Ty<'tcx>, b: Ty<'tcx>) -> UnitResult<'tcx>
fn sub_trait_refs(&self, a_is_expected: bool, origin: TypeOrigin, a: Rc<TraitRef<'tcx>>, b: Rc<TraitRef<'tcx>>) -> UnitResult<'tcx>
fn sub_poly_trait_refs(&self, a_is_expected: bool, origin: TypeOrigin, a: PolyTraitRef<'tcx>, b: PolyTraitRef<'tcx>) -> UnitResult<'tcx>
fn construct_skolemized_subst(&self, generics: &Generics<'tcx>, snapshot: &CombinedSnapshot) -> (Substs<'tcx>, SkolemizationMap)
See higher_ranked::construct_skolemized_subst
fn skolemize_late_bound_regions<T>(&self, value: &Binder<T>, snapshot: &CombinedSnapshot) -> (T, SkolemizationMap) where T: TypeFoldable<'tcx> + Repr<'tcx>
See higher_ranked::skolemize_late_bound_regions
fn leak_check(&self, skol_map: &SkolemizationMap, snapshot: &CombinedSnapshot) -> UnitResult<'tcx>
See higher_ranked::leak_check
fn plug_leaks<T>(&self, skol_map: SkolemizationMap, snapshot: &CombinedSnapshot, value: &T) -> T where T: TypeFoldable<'tcx> + Repr<'tcx>
See higher_ranked::plug_leaks
fn equality_predicate(&self, span: Span, predicate: &PolyEquatePredicate<'tcx>) -> UnitResult<'tcx>
fn region_outlives_predicate(&self, span: Span, predicate: &PolyRegionOutlivesPredicate) -> UnitResult<'tcx>
fn next_ty_var_id(&self, diverging: bool) -> TyVid
fn next_ty_var(&self) -> Ty<'tcx>
fn next_diverging_ty_var(&self) -> Ty<'tcx>
fn next_ty_vars(&self, n: usize) -> Vec<Ty<'tcx>>
fn next_int_var_id(&self) -> IntVid
fn next_float_var_id(&self) -> FloatVid
fn next_region_var(&self, origin: RegionVariableOrigin) -> Region
fn region_vars_for_defs(&self, span: Span, defs: &[RegionParameterDef]) -> Vec<Region>
fn fresh_substs_for_generics(&self, span: Span, generics: &Generics<'tcx>) -> Substs<'tcx>
Given a set of generics defined on a type or impl, returns a substitution mapping each type/region parameter to a fresh inference variable.
fn fresh_substs_for_trait(&self, span: Span, generics: &Generics<'tcx>, self_ty: Ty<'tcx>) -> Substs<'tcx>
Given a set of generics defined on a trait, returns a substitution mapping each output
type/region parameter to a fresh inference variable, and mapping the self type to
self_ty
.
fn fresh_bound_region(&self, debruijn: DebruijnIndex) -> Region
fn resolve_regions_and_report_errors(&self, free_regions: &FreeRegionMap, subject_node_id: NodeId)
fn ty_to_string(&self, t: Ty<'tcx>) -> String
fn tys_to_string(&self, ts: &[Ty<'tcx>]) -> String
fn trait_ref_to_string(&self, t: &Rc<TraitRef<'tcx>>) -> String
fn shallow_resolve(&self, typ: Ty<'tcx>) -> Ty<'tcx>
fn resolve_type_vars_if_possible<T: TypeFoldable<'tcx>>(&self, value: &T) -> T
Where possible, replaces type/int/float variables in
value
with their final value. Note that region variables
are unaffected. If a type variable has not been unified, it
is left as is. This is an idempotent operation that does
not affect inference state in any way and so you can do it
at will.
fn fully_resolve<T: TypeFoldable<'tcx>>(&self, value: &T) -> fres<T>
Attempts to resolve all type/region variables in
value
. Region inference must have been run already (e.g.,
by calling resolve_regions_and_report_errors
). If some
variable was never unified, an Err
results.
This method is idempotent, but it not typically not invoked except during the writeback phase.
fn type_error_message_str<M>(&self, sp: Span, mk_msg: M, actual_ty: String, err: Option<&type_err<'tcx>>) where M: FnOnce(Option<String>, String) -> String
fn type_error_message_str_with_expected<M>(&self, sp: Span, mk_msg: M, expected_ty: Option<Ty<'tcx>>, actual_ty: String, err: Option<&type_err<'tcx>>) where M: FnOnce(Option<String>, String) -> String
fn type_error_message<M>(&self, sp: Span, mk_msg: M, actual_ty: Ty<'tcx>, err: Option<&type_err<'tcx>>) where M: FnOnce(String) -> String
fn report_mismatched_types(&self, span: Span, expected: Ty<'tcx>, actual: Ty<'tcx>, err: &type_err<'tcx>)
fn replace_late_bound_regions_with_fresh_var<T>(&self, span: Span, lbrct: LateBoundRegionConversionTime, value: &Binder<T>) -> (T, FnvHashMap<BoundRegion, Region>) where T: TypeFoldable<'tcx> + Repr<'tcx>
fn verify_generic_bound(&self, origin: SubregionOrigin<'tcx>, kind: GenericKind<'tcx>, a: Region, bs: Vec<Region>)
See verify_generic_bound
method in region_inference
fn can_equate<'b, T>(&'b self, a: &T, b: &T) -> UnitResult<'tcx> where T: Relate<'b, 'tcx> + Repr<'tcx>
Trait Implementations
impl<'a, 'tcx> ErrorReporting<'tcx> for InferCtxt<'a, 'tcx>
fn report_region_errors(&self, errors: &Vec<RegionResolutionError<'tcx>>)
fn process_errors(&self, errors: &Vec<RegionResolutionError<'tcx>>) -> Vec<RegionResolutionError<'tcx>>
fn report_type_error(&self, trace: TypeTrace<'tcx>, terr: &type_err<'tcx>)
fn report_and_explain_type_error(&self, trace: TypeTrace<'tcx>, terr: &type_err<'tcx>)
fn values_str(&self, values: &ValuePairs<'tcx>) -> Option<String>
Returns a string of the form "expected {}
, found {}
", or None if this is a derived
error.