[][src]Struct rustc_mir::borrow_check::nll::universal_regions::UniversalRegions

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

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The vid assigned to 'static

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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.

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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:

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See first_extern_index.

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The total number of universal region variables instantiated.

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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 FnDef.

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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. =)

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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. =)

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Methods

impl<'tcx> UniversalRegions<'tcx>
[src]

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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.

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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].

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True if r is a member of this set of universal regions.

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Classifies r as a universal region, returning None if this is not a member of this set of universal regions.

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Returns an iterator over all the RegionVids corresponding to universally quantified free regions.

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True if r is classified as an local region.

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Returns the number of universal regions created in any category.

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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.

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Get an iterator over all the early-bound regions that have names.

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See UniversalRegionIndices::to_region_vid.

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As part of the NLL unit tests, you can annotate a function with #[rustc_regions], and we will emit information about the region inference context and -- in particular -- the external constraints that this region imposes on others. The methods in this file handle the part about dumping the inference context internal state.

Trait Implementations

impl<'tcx> Debug for UniversalRegions<'tcx>
[src]

Formats the value using the given formatter. Read more

Auto Trait Implementations

impl<'tcx> !Send for UniversalRegions<'tcx>

impl<'tcx> !Sync for UniversalRegions<'tcx>

Blanket Implementations

impl<T> From for T
[src]

Performs the conversion.

impl<T, U> Into for T where
    U: From<T>, 
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Performs the conversion.

impl<T, U> TryFrom for T where
    T: From<U>, 
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The type returned in the event of a conversion error.

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Performs the conversion.

impl<T> Borrow for T where
    T: ?Sized
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Important traits for &'a mut R

Immutably borrows from an owned value. Read more

impl<T, U> TryInto for T where
    U: TryFrom<T>, 
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The type returned in the event of a conversion error.

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Performs the conversion.

impl<T> BorrowMut for T where
    T: ?Sized
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Important traits for &'a mut R

Mutably borrows from an owned value. Read more

impl<T> Any for T where
    T: 'static + ?Sized
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Gets the TypeId of self. Read more

impl<E> SpecializationError for E
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Create an error for a missing method specialization. Defaults to panicking with type, trait & method names. S is the encoder/decoder state type, T is the type being encoded/decoded, and the arguments are the names of the trait and method that should've been overridden. Read more

impl<T> Erased for T
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impl<T> Send for T where
    T: ?Sized
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impl<T> Sync for T where
    T: ?Sized
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impl<T> Erased for T

impl<T> MaybeResult for T
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impl<'a, T> Captures for T where
    T: ?Sized
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