Struct rustc_infer::infer::outlives::test_type_match::Match

struct Match<'tcx> {
    tcx: TyCtxt<'tcx>,
    param_env: ParamEnv<'tcx>,
    pattern_depth: DebruijnIndex,
    map: FxHashMap<BoundRegion, Region<'tcx>>,
}

Fields

tcx: TyCtxt<'tcx>

param_env: ParamEnv<'tcx>

pattern_depth: DebruijnIndex

map: FxHashMap<BoundRegion, Region<'tcx>>

Implementations

impl<'tcx> Match<'tcx>

fn new(tcx: TyCtxt<'tcx>, param_env: ParamEnv<'tcx>) -> Match<'tcx>

impl<'tcx> Match<'tcx>

fn no_match<T>(&self) -> RelateResult<'tcx, T>

Creates the “Error” variant that signals “no match”.

fn bind(
    &mut self,
    br: BoundRegion,
    value: Region<'tcx>
) -> RelateResult<'tcx, Region<'tcx>>

Binds the pattern variable br to value; returns an Err if the pattern is already bound to a different value.

Trait Implementations

impl<'tcx> TypeRelation<'tcx> for Match<'tcx>

fn tag(&self) -> &'static str

Returns a static string we can use for printouts.

fn tcx(&self) -> TyCtxt<'tcx>

fn param_env(&self) -> ParamEnv<'tcx>

fn a_is_expected(&self) -> bool

Returns true if the value a is the “expected” type in the relation. Just affects error messages.

fn relate_with_variance<T: Relate<'tcx>>(
    &mut self,
    _: Variance,
    _: VarianceDiagInfo<'tcx>,
    a: T,
    b: T
) -> RelateResult<'tcx, T>

Switch variance for the purpose of relating a and b.

fn regions(
    &mut self,
    pattern: Region<'tcx>,
    value: Region<'tcx>
) -> RelateResult<'tcx, Region<'tcx>>

fn tys(
    &mut self,
    pattern: Ty<'tcx>,
    value: Ty<'tcx>
) -> RelateResult<'tcx, Ty<'tcx>>

fn consts(
    &mut self,
    pattern: Const<'tcx>,
    value: Const<'tcx>
) -> RelateResult<'tcx, Const<'tcx>>

fn binders<T>(
    &mut self,
    pattern: Binder<'tcx, T>,
    value: Binder<'tcx, T>
) -> RelateResult<'tcx, Binder<'tcx, T>> where
    T: Relate<'tcx>, 

fn with_cause<F, R>(&mut self, _cause: Cause, f: F) -> R where
    F: FnOnce(&mut Self) -> R, 

fn relate<T>(&mut self, a: T, b: T) -> Result<T, TypeError<'tcx>> where
    T: Relate<'tcx>, 

Generic relation routine suitable for most anything.

fn relate_item_substs(
    &mut self,
    item_def_id: DefId,
    a_subst: &'tcx List<GenericArg<'tcx>>,
    b_subst: &'tcx List<GenericArg<'tcx>>
) -> Result<&'tcx List<GenericArg<'tcx>>, TypeError<'tcx>>

Relate the two substitutions for the given item. The default is to look up the variance for the item and proceed accordingly.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 56 bytes