Struct rustc_middle::ty::InstantiatedPredicates

pub struct InstantiatedPredicates<'tcx> {
    pub predicates: Vec<Clause<'tcx>>,
    pub spans: Vec<Span>,
}

Represents the bounds declared on a particular set of type parameters. Should eventually be generalized into a flag list of where-clauses. You can obtain an InstantiatedPredicates list from a GenericPredicates by using the instantiate method. Note that this method reflects an important semantic invariant of InstantiatedPredicates: while the GenericPredicates are expressed in terms of the bound type parameters of the impl/trait/whatever, an InstantiatedPredicates instance represented a set of bounds for some particular instantiation, meaning that the generic parameters have been substituted with their values.

Example:

struct Foo<T, U: Bar<T>> { ... }

Here, the GenericPredicates for Foo would contain a list of bounds like [[], [U:Bar<T>]]. Now if there were some particular reference like Foo<isize,usize>, then the InstantiatedPredicates would be [[], [usize:Bar<isize>]].

Fields

predicates: Vec<Clause<'tcx>>

spans: Vec<Span>

Implementations

impl<'tcx> InstantiatedPredicates<'tcx>

pub fn empty() -> InstantiatedPredicates<'tcx>

pub fn is_empty(&self) -> bool

pub fn iter(&self) -> <&Self as IntoIterator>::IntoIter

Trait Implementations

impl<'tcx> Clone for InstantiatedPredicates<'tcx>

fn clone(&self) -> InstantiatedPredicates<'tcx>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'tcx> Debug for InstantiatedPredicates<'tcx>

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

Formats the value using the given formatter.

impl<'a, 'tcx> IntoIterator for &'a InstantiatedPredicates<'tcx>

type Item = (Clause<'tcx>, Span)

The type of the elements being iterated over.

type IntoIter = Zip<Copied<Iter<'a, Clause<'tcx>>>, Copied<Iter<'a, Span>>>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl<'tcx> IntoIterator for InstantiatedPredicates<'tcx>

type Item = (Clause<'tcx>, Span)

The type of the elements being iterated over.

type IntoIter = Zip<IntoIter<Clause<'tcx>, Global>, IntoIter<Span, Global>>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for InstantiatedPredicates<'tcx>

fn try_fold_with<__F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, __folder: &mut __F ) -> Result<Self, __F::Error>

The entry point for folding. To fold a value t with a folder f call: t.try_fold_with(f).

fn fold_with<F>(self, folder: &mut F) -> Selfwhere F: TypeFolder<I>,

A convenient alternative to try_fold_with for use with infallible folders. Do not override this method, to ensure coherence with try_fold_with.

impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for InstantiatedPredicates<'tcx>

fn visit_with<__V: TypeVisitor<TyCtxt<'tcx>>>( &self, __visitor: &mut __V ) -> ControlFlow<__V::BreakTy>

The entry point for visiting. To visit a value t with a visitor v call: t.visit_with(v).

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: 48 bytes