Struct rustc_mir::borrow_check::nll::region_infer::values::RegionValues[][src]

pub(crate) struct RegionValues<N: Idx> {
    elements: Rc<RegionValueElements>,
    points: SparseBitMatrix<N, PointIndex>,
    free_regions: SparseBitMatrix<N, RegionVid>,
    placeholders: SparseBitMatrix<N, PlaceholderIndex>,
}
🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Stores the full values for a set of regions (in contrast to LivenessValues, which only stores those points in the where a region is live). The full value for a region may contain points in the CFG, but also free regions as well as bound universe placeholders.

Example:

fn foo(x: &'a u32) -> &'a u32 {
   let y: &'0 u32 = x; // let's call this `'0`
   y
}

Here, the variable '0 would contain the free region 'a, because (since it is returned) it must live for at least 'a. But it would also contain various points from within the function.

Fields

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Placeholders represent bound regions -- so something like 'a in for<'a> fn(&'a u32)`.

Methods

impl<N: Idx> RegionValues<N>
[src]

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Creates a new set of "region values" that tracks causal information. Each of the regions in num_region_variables will be initialized with an empty set of points and no causal information.

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Adds the given element to the value for the given region. Returns true if the element is newly added (i.e., was not already present).

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Adds all the control-flow points to the values for r.

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Add all elements in r_from to r_to (because e.g. r_to: r_from).

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

True if the region r contains the given element.

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

self[to] |= values[from], essentially: that is, take all the elements for the region from from values and add them to the region to in self.

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

True if sup_region contains all the CFG points that sub_region contains. Ignores universal regions.

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Returns the locations contained within a given region r.

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Returns just the universal regions that are contained in a given region's value.

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Returns all the elements contained in a given region's value.

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Returns all the elements contained in a given region's value.

🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Returns a "pretty" string value of the region. Meant for debugging.

Trait Implementations

impl<N: Clone + Idx> Clone for RegionValues<N>
[src]

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Auto Trait Implementations

impl<N> !Send for RegionValues<N>

impl<N> !Sync for RegionValues<N>