Struct rustc_mir::borrow_check::nll::universal_regions::UniversalRegions [−][src]
pub struct UniversalRegions<'tcx> { indices: UniversalRegionIndices<'tcx>, pub fr_static: RegionVid, pub fr_fn_body: RegionVid, first_extern_index: usize, first_local_index: usize, num_universals: usize, pub defining_ty: DefiningTy<'tcx>, pub unnormalized_output_ty: Ty<'tcx>, pub unnormalized_input_tys: &'tcx [Ty<'tcx>], pub yield_ty: Option<Ty<'tcx>>, }
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Fields
indices: UniversalRegionIndices<'tcx>
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fr_static: RegionVid
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The vid assigned to 'static
fr_fn_body: RegionVid
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A special region vid created to represent the current MIR fn body. It will outlive the entire CFG but it will not outlive any other universal regions.
first_extern_index: usize
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We create region variables such that they are ordered by their
RegionClassification
. The first block are globals, then
externals, then locals. So things from:
FIRST_GLOBAL_INDEX..first_extern_index
are global;first_extern_index..first_local_index
are external; andfirst_local_index..num_universals
are local.
first_local_index: usize
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See first_extern_index
.
num_universals: usize
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The total number of universal region variables instantiated.
defining_ty: DefiningTy<'tcx>
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The "defining" type for this function, with all universal
regions instantiated. For a closure or generator, this is the
closure type, but for a top-level function it's the TyFnDef
.
unnormalized_output_ty: Ty<'tcx>
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The return type of this function, with all regions replaced by
their universal RegionVid
equivalents.
NB. Associated types in this type have not been normalized, as the name suggests. =)
unnormalized_input_tys: &'tcx [Ty<'tcx>]
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The fully liberated input types of this function, with all
regions replaced by their universal RegionVid
equivalents.
NB. Associated types in these types have not been normalized, as the name suggests. =)
yield_ty: Option<Ty<'tcx>>
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Methods
impl<'tcx> UniversalRegions<'tcx>
[src]
impl<'tcx> UniversalRegions<'tcx>
pub fn new(
infcx: &InferCtxt<'_, '_, 'tcx>,
mir_def_id: DefId,
param_env: ParamEnv<'tcx>
) -> Self
[src]
pub fn new(
infcx: &InferCtxt<'_, '_, 'tcx>,
mir_def_id: DefId,
param_env: ParamEnv<'tcx>
) -> Self
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Creates a new and fully initialized UniversalRegions
that
contains indices for all the free regions found in the given
MIR -- that is, all the regions that appear in the function's
signature. This will also compute the relationships that are
known between those regions.
pub fn closure_mapping(
tcx: TyCtxt<'_, '_, 'tcx>,
closure_ty: Ty<'tcx>,
expected_num_vars: usize,
closure_base_def_id: DefId
) -> IndexVec<RegionVid, Region<'tcx>>
[src]
pub fn closure_mapping(
tcx: TyCtxt<'_, '_, 'tcx>,
closure_ty: Ty<'tcx>,
expected_num_vars: usize,
closure_base_def_id: DefId
) -> IndexVec<RegionVid, Region<'tcx>>
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Given a reference to a closure type, extracts all the values
from its free regions and returns a vector with them. This is
used when the closure's creator checks that the
ClosureRegionRequirements
are met. The requirements from
ClosureRegionRequirements
are expressed in terms of
RegionVid
entries that map into the returned vector V
: so
if the ClosureRegionRequirements
contains something like
'1: '2
, then the caller would impose the constraint that
V[1]: V[2]
.
pub fn is_universal_region(&self, r: RegionVid) -> bool
[src]
pub fn is_universal_region(&self, r: RegionVid) -> bool
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True if r
is a member of this set of universal regions.
pub fn region_classification(
&self,
r: RegionVid
) -> Option<RegionClassification>
[src]
pub fn region_classification(
&self,
r: RegionVid
) -> Option<RegionClassification>
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Classifies r
as a universal region, returning None
if this
is not a member of this set of universal regions.
pub fn universal_regions(&self) ->
[src]
pub fn universal_regions(&self) ->
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Returns an iterator over all the RegionVids corresponding to universally quantified free regions.
pub fn is_local_free_region(&self, r: RegionVid) -> bool
[src]
pub fn is_local_free_region(&self, r: RegionVid) -> bool
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True if r
is classified as an local region.
pub fn len(&self) -> usize
[src]
pub fn len(&self) -> usize
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Returns the number of universal regions created in any category.
pub fn num_global_and_external_regions(&self) -> usize
[src]
pub fn num_global_and_external_regions(&self) -> usize
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Returns the number of global plus external universal regions. For closures, these are the regions that appear free in the closure type (versus those bound in the closure signature). They are therefore the regions between which the closure may impose constraints that its creator must verify.
pub fn named_universal_regions<'s>(&'s self) -> <'tcx, 's>
[src]
pub fn named_universal_regions<'s>(&'s self) -> <'tcx, 's>
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Get an iterator over all the early-bound regions that have names.
pub fn to_region_vid(&self, r: Region<'tcx>) -> RegionVid
[src]
pub fn to_region_vid(&self, r: Region<'tcx>) -> RegionVid
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See UniversalRegionIndices::to_region_vid
.
Trait Implementations
impl<'tcx> Debug for UniversalRegions<'tcx>
[src]
impl<'tcx> Debug for UniversalRegions<'tcx>
Auto Trait Implementations
impl<'tcx> !Send for UniversalRegions<'tcx>
impl<'tcx> !Send for UniversalRegions<'tcx>
impl<'tcx> !Sync for UniversalRegions<'tcx>
impl<'tcx> !Sync for UniversalRegions<'tcx>