Enum rustc::ty::ObjectLifetimeDefault

pub enum ObjectLifetimeDefault {
    Ambiguous,
    BaseDefault,
    Specific(Region),
}

Unstable (rustc_private)

Default region to use for the bound of objects that are supplied as the value for this type parameter. This is derived from T:'a annotations appearing in the type definition. If this is None, then the default is inherited from the surrounding context. See RFC #599 for details.

Variants

Ambiguous

Unstable (rustc_private)

Require an explicit annotation. Occurs when multiple T:'a constraints are found.

BaseDefault

Unstable (rustc_private)

Use the base default, typically 'static, but in a fn body it is a fresh variable

Specific(Region)

Unstable (rustc_private)

Use the given region as the default.

Trait Implementations

impl<'tcx> TypeFoldable<'tcx> for ObjectLifetimeDefault

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 ObjectLifetimeDefault

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

Formats the value using the given formatter.

Derived Implementations

impl Clone for ObjectLifetimeDefault

fn clone(&self) -> ObjectLifetimeDefault

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for ObjectLifetimeDefault