[−][src]Struct rustc_mir::build::scope::Scope
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Fields
source_scope: SourceScope
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The source scope this scope was created in.
region_scope: Scope
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the region span of this scope within source code.
region_scope_span: Span
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the span of that region_scope
needs_cleanup: bool
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Whether there's anything to do for the cleanup path, that is, when unwinding through this scope. This includes destructors, but not StorageDead statements, which don't get emitted at all for unwinding, for several reasons:
- clang doesn't emit llvm.lifetime.end for C++ unwinding
- LLVM's memory dependency analysis can't handle it atm
- polluting the cleanup MIR with StorageDead creates landing pads even though there's no actual destructors
- freeing up stack space has no effect during unwinding
drops: Vec<DropData<'tcx>>
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set of places to drop when exiting this scope. This starts out empty but grows as variables are declared during the building process. This is a stack, so we always drop from the end of the vector (top of the stack) first.
cached_exits: FxHashMap<(BasicBlock, Scope), BasicBlock>
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The cache for drop chain on “normal” exit into a particular BasicBlock.
cached_generator_drop: Option<BasicBlock>
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The cache for drop chain on "generator drop" exit.
cached_unwind: CachedBlock
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The cache for drop chain on "unwind" exit.
Methods
impl<'tcx> Scope<'tcx>
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impl<'tcx> Scope<'tcx>
fn invalidate_cache(&mut self, storage_only: bool, this_scope_only: bool)
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fn invalidate_cache(&mut self, storage_only: bool, this_scope_only: bool)
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Invalidate all the cached blocks in the scope.
Should always be run for all inner scopes when a drop is pushed into some scope enclosing a larger extent of code.
storage_only
controls whether to invalidate only drop paths run StorageDead
.
this_scope_only
controls whether to invalidate only drop paths that refer to the current
top-of-scope (as opposed to dependent scopes).
fn source_info(&self, span: Span) -> SourceInfo
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fn source_info(&self, span: Span) -> SourceInfo
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Given a span and this scope's source scope, make a SourceInfo.
Trait Implementations
Auto Trait Implementations
Blanket Implementations
impl<T> From for T
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impl<T> From for T
impl<T, U> Into for T where
U: From<T>,
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impl<T, U> Into for T where
U: From<T>,
impl<T, U> TryFrom for T where
T: From<U>,
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impl<T, U> TryFrom for T where
T: From<U>,
type Error = !
try_from
)The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
try_from
)Performs the conversion.
impl<T> Borrow for T where
T: ?Sized,
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impl<T> Borrow for T where
T: ?Sized,
ⓘImportant traits for &'a mut Rfn borrow(&self) -> &T
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fn borrow(&self) -> &T
Immutably borrows from an owned value. Read more
impl<T, U> TryInto for T where
U: TryFrom<T>,
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impl<T, U> TryInto for T where
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
try_from
)The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
try_from
)Performs the conversion.
impl<T> BorrowMut for T where
T: ?Sized,
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impl<T> BorrowMut for T where
T: ?Sized,
ⓘImportant traits for &'a mut Rfn borrow_mut(&mut self) -> &mut T
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fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
impl<T> Any for T where
T: 'static + ?Sized,
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impl<T> Any for T where
T: 'static + ?Sized,
fn get_type_id(&self) -> TypeId
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fn get_type_id(&self) -> TypeId
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this method will likely be replaced by an associated static
Gets the TypeId
of self
. Read more
impl<E> SpecializationError for E
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impl<E> SpecializationError for E
fn not_found<S, T>(trait_name: &'static str, method_name: &'static str) -> E where
T: ?Sized,
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fn not_found<S, T>(trait_name: &'static str, method_name: &'static str) -> E where
T: ?Sized,
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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> Erased for T
impl<T> Send for T where
T: ?Sized,
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impl<T> Send for T where
T: ?Sized,
impl<T> Sync for T where
T: ?Sized,
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impl<T> Sync for T where
T: ?Sized,
impl<T> Erased for T
impl<T> Erased for T
impl<T> MaybeResult for T
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impl<T> MaybeResult for T
fn from_ok(x: T) -> T
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fn from_ok(x: T) -> T
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fn map_same<F>(self, f: F) -> T where
F: FnOnce(T) -> T,
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fn map_same<F>(self, f: F) -> T where
F: FnOnce(T) -> T,
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impl<'a, T> Captures for T where
T: ?Sized,
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impl<'a, T> Captures for T where
T: ?Sized,