Struct rustc_mir::borrow_check::nll::type_check::liveness::local_use_map::LocalUseMap

pub(crate) struct LocalUseMap<'me> {
    liveness_map: &'me NllLivenessMap,
    first_def_at: IndexVec<LiveVar, Option<AppearanceIndex>>,
    first_use_at: IndexVec<LiveVar, Option<AppearanceIndex>>,
    first_drop_at: IndexVec<LiveVar, Option<AppearanceIndex>>,
    appearances: IndexVec<AppearanceIndex, Appearance>,
}

🔬 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?

A map that cross references each local with the locations where it is defined (assigned), used, or dropped. Used during liveness computation.

Fields

liveness_map: &'me NllLivenessMap

🔬 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?

first_def_at: IndexVec<LiveVar, Option<AppearanceIndex>>

🔬 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?

Head of a linked list of definitions of each variable -- definition in this context means assignment, e.g. x is defined in x = y but not y; that first def is the head of a linked list that lets you enumerate all places the variable is assigned.

first_use_at: IndexVec<LiveVar, Option<AppearanceIndex>>

🔬 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?

Head of a linked list of uses of each variable -- use in this context means that the existing value of the variable is read or modified. e.g., y is used in x = y but not x. Note that DROP(x) terminators are excluded from this list.

first_drop_at: IndexVec<LiveVar, Option<AppearanceIndex>>

🔬 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?

Head of a linked list of drops of each variable -- these are a special category of uses corresponding to the drop that we add for each local variable.

appearances: IndexVec<AppearanceIndex, Appearance>

🔬 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?

Methods

impl<'me> LocalUseMap<'me>

pub(crate) fn build(     liveness_map: &'me NllLivenessMap,     elements: &RegionValueElements,     mir: &Mir ) -> 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?

pub(crate) fn defs(     &self,     local: LiveVar ) -> impl Iterator<Item = PointIndex> + '_

🔬 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?

pub(crate) fn uses(     &self,     local: LiveVar ) -> impl Iterator<Item = PointIndex> + '_

🔬 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?

pub(crate) fn drops(     &self,     local: LiveVar ) -> impl Iterator<Item = PointIndex> + '_

🔬 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?