Struct rustc_infer::infer::outlives::env::OutlivesEnvironment
source · pub struct OutlivesEnvironment<'tcx> {
pub param_env: ParamEnv<'tcx>,
free_region_map: FreeRegionMap<'tcx>,
region_bound_pairs: RegionBoundPairs<'tcx>,
}
Expand description
The OutlivesEnvironment
collects information about what outlives
what in a given type-checking setting. For example, if we have a
where-clause like where T: 'a
in scope, then the
OutlivesEnvironment
would record that (in its
region_bound_pairs
field). Similarly, it contains methods for
processing and adding implied bounds into the outlives
environment.
Other code at present does not typically take a
&OutlivesEnvironment
, but rather takes some of its fields (e.g.,
process_registered_region_obligations
wants the
region-bound-pairs). There is no mistaking it: the current setup
of tracking region information is quite scattered! The
OutlivesEnvironment
, for example, needs to sometimes be combined
with the middle::RegionRelations
, to yield a full picture of how
(lexical) lifetimes interact. However, I’m reluctant to do more
refactoring here, since the setup with NLL is quite different.
For example, NLL has no need of RegionRelations
, and is solely
interested in the OutlivesEnvironment
. -nmatsakis
Fields
param_env: ParamEnv<'tcx>
free_region_map: FreeRegionMap<'tcx>
region_bound_pairs: RegionBoundPairs<'tcx>
Implementations
sourceimpl<'tcx> OutlivesEnvironment<'tcx>
impl<'tcx> OutlivesEnvironment<'tcx>
sourcefn builder(param_env: ParamEnv<'tcx>) -> OutlivesEnvironmentBuilder<'tcx>
fn builder(param_env: ParamEnv<'tcx>) -> OutlivesEnvironmentBuilder<'tcx>
Create a builder using ParamEnv
and add explicit outlives bounds into it.
sourcepub fn new(param_env: ParamEnv<'tcx>) -> Self
pub fn new(param_env: ParamEnv<'tcx>) -> Self
Create a new OutlivesEnvironment
without extra outlives bounds.
sourcepub fn with_bounds<'a>(
param_env: ParamEnv<'tcx>,
infcx: Option<&InferCtxt<'a, 'tcx>>,
extra_bounds: impl IntoIterator<Item = OutlivesBound<'tcx>>
) -> Self
pub fn with_bounds<'a>(
param_env: ParamEnv<'tcx>,
infcx: Option<&InferCtxt<'a, 'tcx>>,
extra_bounds: impl IntoIterator<Item = OutlivesBound<'tcx>>
) -> Self
Create a new OutlivesEnvironment
with extra outlives bounds.
sourcepub fn free_region_map(&self) -> &FreeRegionMap<'tcx>
pub fn free_region_map(&self) -> &FreeRegionMap<'tcx>
Borrows current value of the free_region_map
.
sourcepub fn region_bound_pairs(&self) -> &RegionBoundPairs<'tcx>
pub fn region_bound_pairs(&self) -> &RegionBoundPairs<'tcx>
Borrows current region_bound_pairs
.
Trait Implementations
sourceimpl<'tcx> Clone for OutlivesEnvironment<'tcx>
impl<'tcx> Clone for OutlivesEnvironment<'tcx>
sourcefn clone(&self) -> OutlivesEnvironment<'tcx>
fn clone(&self) -> OutlivesEnvironment<'tcx>
1.0.0 · sourcefn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moreAuto Trait Implementations
impl<'tcx> !RefUnwindSafe for OutlivesEnvironment<'tcx>
impl<'tcx> Send for OutlivesEnvironment<'tcx>
impl<'tcx> Sync for OutlivesEnvironment<'tcx>
impl<'tcx> Unpin for OutlivesEnvironment<'tcx>
impl<'tcx> !UnwindSafe for OutlivesEnvironment<'tcx>
Blanket Implementations
sourceimpl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
impl<'a, T> Captures<'a> for Twhere
T: ?Sized,
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: 184 bytes