Struct RegionBinder 

pub struct RegionBinder<T> {
    pub regions: IndexVec<RegionId, RegionParam>,
    pub regions_outlive: Vec<PolyRegionOutlives>,
    pub types_outlive: Vec<PolyTypeOutlives>,
    pub skip_binder: T,
}

A value of type T bound by regions. We should use binder instead but this causes name clash issues in the derived ocaml visitors.

Fields

regions: IndexVec<RegionId, RegionParam>

regions_outlive: Vec<PolyRegionOutlives>

Outlives relations involving the bound regions.

types_outlive: Vec<PolyTypeOutlives>

Outlives relations involving the bound regions.

skip_binder: T

Named this way to highlight accesses to the inner value that might be handling parameters incorrectly. Prefer using helper methods.

Implementations

impl RegionBinder<FunSig>

pub fn infer_region_mapping( &self, target: &Self, ) -> Option<RegionBinder<RegionArgs>>

Infer how the bound regions of self appear in target. The returned binder binds the same regions as target; other lifetimes may differ.

impl RegionBinder<TraitDeclRef>

pub fn identity_region_args(&self) -> RegionArgs

The region arguments at depth 0 corresponding to this tref’s bound regions.

impl<T> RegionBinder<T>

pub fn empty(x: T) -> Self

where T: TyVisitable,

Wrap the value in an empty region binder, shifting variables appropriately.

pub fn to_params(&self) -> GenericParams

The parameters and predicates introduced by this binder.

pub fn map<U>(self, f: impl FnOnce(T) -> U) -> RegionBinder<U>

pub fn map_ref<U>(&self, f: impl FnOnce(&T) -> U) -> RegionBinder<U>

pub fn map_ref_opt<U>( &self, f: impl FnOnce(&T) -> Option<U>, ) -> Option<RegionBinder<U>>

pub fn apply(self, args: RegionArgs) -> T

where T: TyVisitable,

Substitute the bound variables with the given lifetimes.

pub fn apply_keep_params( self, args: RegionArgs, ) -> (T, Vec<PolyRegionOutlives>, Vec<PolyTypeOutlives>)

where T: TyVisitable,

Like apply, but also keep the predicates: they mention the bound regions and therefore need to be substituted before use too.

pub fn no_bound_vars(self) -> T

where T: TyVisitable,

Extract the contents when we now the binder binds nothing.

pub fn erase(self) -> T

where T: TyVisitable,

Substitute the bound variables with erased lifetimes.

impl RegionBinder<TraitDeclRef>

fn format_as_pred<'a, C: AstFormatter + 'a>( &'a self, ctx: &'a C, ) -> impl Display + 'a

impl<T> RegionBinder<T>

fn fmt_params_with_ctx<C: AstFormatter>(&self, ctx: &C) -> String

fn fmt_split<'a, C>(&'a self, ctx: &'a C) -> (String, String)

where C: AstFormatter, T: FmtWithCtx<C::Reborrow<'a>>,

Format the parameters and contents of this binder and returns the resulting strings.

fn fmt_split_with<'a, C>( &'a self, ctx: &'a C, fmt_inner: impl FnOnce(&C::Reborrow<'a>, &T) -> String, ) -> (String, String)

where C: AstFormatter,

Format the parameters and contents of this binder and returns the resulting strings.

fn fmt_as_for<'a, C>(&'a self, ctx: &'a C) -> String

where C: AstFormatter, T: FmtWithCtx<C::Reborrow<'a>>,

Formats the binder as for<params> value.

fn fmt_as_for_with<'a, C>( &'a self, ctx: &'a C, fmt_inner: impl FnOnce(&C::Reborrow<'a>, &T) -> String, ) -> String

where C: AstFormatter, T: FmtWithCtx<C::Reborrow<'a>>,

Formats the binder as for<params> value.

Trait Implementations

impl<T: AstVisitable> AstVisitable for RegionBinder<T>

fn drive<V: VisitAst>(&self, v: &mut V) -> ControlFlow<V::Break>

Recursively visit this type with the provided visitor. This calls the visitor’s visit_$any method if it exists, otherwise visit_inner.

fn drive_mut<V: VisitAstMut>(&mut self, v: &mut V) -> ControlFlow<V::Break>

Recursively visit this type with the provided visitor. This calls the visitor’s visit_$any method if it exists, otherwise visit_inner.

fn drive_two<V: ZipAst>(&self, other: &Self, v: &mut V) -> ControlFlow<V::Break>

Recursively visit this type with the provided visitor. This calls the visitor’s visit_$any method if it exists, otherwise visit_inner.

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

The name of the type, used for debug logging.

fn dyn_visit<T: AstVisitable>(&self, f: impl FnMut(&T))

where Self: Sized,

Visit all occurrences of that type inside self, in pre-order traversal.

fn dyn_visit_mut<T: AstVisitable>(&mut self, f: impl FnMut(&mut T))

where Self: Sized,

Visit all occurrences of that type inside self, in pre-order traversal.

impl<T: Clone> Clone for RegionBinder<T>

fn clone(&self) -> RegionBinder<T>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T: Debug> Debug for RegionBinder<T>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de, T, __State: ?Sized + DedupSerializerState> DeserializeState<'de, __State> for RegionBinder<T>

where T: DeserializeState<'de, __State>,

fn deserialize_state<__D>( __state: &__State, __deserializer: __D, ) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

impl<'s, T, V> Drive<'s, V> for RegionBinder<T>

where V: Visitor + Visit<'s, IndexVec<RegionId, RegionParam>> + Visit<'s, Vec<PolyRegionOutlives>> + Visit<'s, Vec<PolyTypeOutlives>> + Visit<'s, T>,

fn drive_inner(&'s self, visitor: &mut V) -> ControlFlow<V::Break>

Call v.visit() on the immediate contents of self.

impl<'s, T, V> DriveMut<'s, V> for RegionBinder<T>

where V: Visitor + VisitMut<'s, IndexVec<RegionId, RegionParam>> + VisitMut<'s, Vec<PolyRegionOutlives>> + VisitMut<'s, Vec<PolyTypeOutlives>> + VisitMut<'s, T>,

fn drive_inner_mut(&'s mut self, visitor: &mut V) -> ControlFlow<V::Break>

Call v.visit() on the immediate contents of self.

impl<'s, T, V> DriveTwo<'s, V> for RegionBinder<T>

where V: Visitor<Break: Default> + VisitTwo<'s, IndexVec<RegionId, RegionParam>> + VisitTwo<'s, Vec<PolyRegionOutlives>> + VisitTwo<'s, Vec<PolyTypeOutlives>> + VisitTwo<'s, T>,

fn drive_two_inner( &'s self, other: &'s Self, visitor: &mut V, ) -> ControlFlow<V::Break>

Call v.visit() on the immediate contents of self and other, if they correspond. If the values don’t match up, this returns Break(Default::default()).

impl<T: Eq> Eq for RegionBinder<T>

impl<C: AstFormatter> FmtWithCtx<C> for RegionBinder<FunSig>

fn fmt_with_ctx(&self, ctx: &C, f: &mut Formatter<'_>) -> Result

fn with_ctx<'a>(&'a self, ctx: &'a C) -> WithCtx<'a, C, Self>

Returns a struct that implements Display. This allows the following:

fn to_string_with_ctx(&self, ctx: &C) -> String

impl<T: HasSafety> HasSafety for RegionBinder<T>

fn safety(&self, krate: &TranslatedCrate) -> Safety

impl<T: Hash> Hash for RegionBinder<T>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<T: Ord> Ord for RegionBinder<T>

fn cmp(&self, other: &RegionBinder<T>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl<T: PartialEq> PartialEq for RegionBinder<T>

fn eq(&self, other: &RegionBinder<T>) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl<T: PartialOrd> PartialOrd for RegionBinder<T>

fn partial_cmp(&self, other: &RegionBinder<T>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<T, __State: ?Sized + DedupSerializerState> SerializeState<__State> for RegionBinder<T>

where T: SerializeState<__State>,

fn serialize_state<__S>( &self, __state: &__State, __serializer: __S, ) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

impl<T: PartialEq> StructuralPartialEq for RegionBinder<T>