Struct rustc::ty::InstantiatedPredicates

pub struct InstantiatedPredicates<'tcx> {
    pub predicates: VecPerParamSpace<Predicate<'tcx>>,
}

Unstable (rustc_private)

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 a 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: VecPerParamSpace<Predicate<'tcx>>

Unstable (rustc_private)

Methods

impl<'tcx> InstantiatedPredicates<'tcx>

fn empty() -> InstantiatedPredicates<'tcx>

fn is_empty(&self) -> bool

Trait Implementations

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

fn super_fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(&self, folder: &mut F) -> Self

fn super_visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool

fn fold_with<'gcx: 'tcx, F: TypeFolder<'gcx, 'tcx>>(&self, folder: &mut F) -> Self

fn visit_with<V: TypeVisitor<'tcx>>(&self, visitor: &mut V) -> bool

fn has_regions_escaping_depth(&self, depth: u32) -> bool

fn has_escaping_regions(&self) -> bool

fn has_type_flags(&self, flags: TypeFlags) -> bool

fn has_projection_types(&self) -> bool

fn references_error(&self) -> bool

fn has_param_types(&self) -> bool

fn has_self_ty(&self) -> bool

fn has_infer_types(&self) -> bool

fn needs_infer(&self) -> bool

fn needs_subst(&self) -> bool

fn has_closure_types(&self) -> bool

fn has_erasable_regions(&self) -> bool

fn is_global(&self) -> bool

Indicates whether this value references only 'global' types/lifetimes that are the same regardless of what fn we are in. This is used for caching. Errs on the side of returning false.

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

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

Formats the value using the given formatter.

Derived 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.