Struct Binder

pub struct Binder<T> {
    pub params: GenericParams,
    pub skip_binder: T,
    pub kind: BinderKind,
}

A value of type T bound by generic parameters. Used in any context where we’re adding generic parameters that aren’t on the top-level item, e.g. for<'a> clauses (uses RegionBinder for now), trait methods, GATs (TODO).

Fields

params: GenericParams

skip_binder: T

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

kind: BinderKind

The kind of binder this is.

Implementations

impl Binder<TraitAssocTy>

pub fn name(&self) -> &TraitItemName

impl Binder<TraitMethod>

pub fn name(&self) -> TraitItemName

impl<T> Binder<T>

pub fn empty(kind: BinderKind, x: T) -> Self

where T: TyVisitable,

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

pub fn new(kind: BinderKind, params: GenericParams, skip_binder: T) -> Self

pub fn binds_anything(&self) -> bool

Whether this binder binds any variables.

pub fn get_if_binds_nothing(&self) -> Option<T>

where T: TyVisitable + Clone,

Retreive the contents of this binder if the binder binds no variables. This is the invers of Binder::empty.

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

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

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

where T: TyVisitable,

Substitute the provided arguments for the variables bound in this binder and return the substituted inner value.

impl<T: AstVisitable> Binder<Binder<T>>

pub fn flatten(self) -> Binder<T>

Flatten two levels of binders into a single one.

impl<T> Binder<T>

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.

Trait Implementations

impl<T: AstVisitable> AstVisitable for Binder<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 name(&self) -> &'static str

The name of the type, used for debug logging.

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

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))

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

impl<T: Clone> Clone for Binder<T>

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for Binder<T>

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

Formats the value using the given formatter.

impl<'de, T> Deserialize<'de> for Binder<T>

where T: Deserialize<'de>,

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

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

where V: Visitor + Visit<'s, GenericParams> + 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 Binder<T>

where V: Visitor + VisitMut<'s, GenericParams> + 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<T: Hash> Hash for Binder<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: PartialEq> PartialEq for Binder<T>

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<T> Serialize for Binder<T>

where T: Serialize,

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<T: Eq> Eq for Binder<T>

impl<T> StructuralPartialEq for Binder<T>