rustc_const_eval::check_consts::check

Struct Checker

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pub struct Checker<'mir, 'tcx> {
    ccx: &'mir ConstCx<'mir, 'tcx>,
    qualifs: Qualifs<'mir, 'tcx>,
    span: Span,
    transient_locals: Option<BitSet<Local>>,
    error_emitted: Option<ErrorGuaranteed>,
    secondary_errors: Vec<Diag<'tcx>>,
}

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§ccx: &'mir ConstCx<'mir, 'tcx>§qualifs: Qualifs<'mir, 'tcx>§span: Span

The span of the current statement.

§transient_locals: Option<BitSet<Local>>

A set that stores for each local whether it is “transient”, i.e. guaranteed to be dead when this MIR body returns.

§error_emitted: Option<ErrorGuaranteed>§secondary_errors: Vec<Diag<'tcx>>

Implementations§

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impl<'mir, 'tcx> Checker<'mir, 'tcx>

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pub fn new(ccx: &'mir ConstCx<'mir, 'tcx>) -> Self

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pub fn check_body(&mut self)

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fn local_is_transient(&mut self, local: Local) -> bool

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pub fn qualifs_in_return_place(&mut self) -> ConstQualifs

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pub fn check_op(&mut self, op: impl NonConstOp<'tcx>)

Emits an error if an expression cannot be evaluated in the current context.

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pub fn check_op_spanned<O: NonConstOp<'tcx>>(&mut self, op: O, span: Span)

Emits an error at the given span if an expression cannot be evaluated in the current context.

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fn check_static(&mut self, def_id: DefId, span: Span)

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fn place_may_escape(&mut self, place: &Place<'_>) -> bool

Returns whether this place can possibly escape the evaluation of the current const/static initializer. The check assumes that all already existing pointers and references point to non-escaping places.

Methods from Deref<Target = ConstCx<'mir, 'tcx>>§

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pub(crate) fn dcx(&self) -> DiagCtxtHandle<'tcx>

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pub fn def_id(&self) -> LocalDefId

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pub fn const_kind(&self) -> ConstContext

Returns the kind of const context this Item represents (const, static, etc.).

Panics if this Item is not const.

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pub fn is_const_stable_const_fn(&self) -> bool

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fn is_async(&self) -> bool

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pub fn fn_sig(&self) -> PolyFnSig<'tcx>

Trait Implementations§

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impl<'mir, 'tcx> Deref for Checker<'mir, 'tcx>

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type Target = ConstCx<'mir, 'tcx>

The resulting type after dereferencing.
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fn deref(&self) -> &Self::Target

Dereferences the value.
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impl<'tcx> Visitor<'tcx> for Checker<'_, 'tcx>

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fn visit_basic_block_data( &mut self, bb: BasicBlock, block: &BasicBlockData<'tcx>, )

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fn visit_rvalue(&mut self, rvalue: &Rvalue<'tcx>, location: Location)

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fn visit_operand(&mut self, op: &Operand<'tcx>, location: Location)

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fn visit_source_info(&mut self, source_info: &SourceInfo)

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fn visit_statement(&mut self, statement: &Statement<'tcx>, location: Location)

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fn visit_terminator( &mut self, terminator: &Terminator<'tcx>, location: Location, )

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fn visit_body(&mut self, body: &Body<'tcx>)

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fn visit_source_scope_data(&mut self, scope_data: &SourceScopeData<'tcx>)

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fn visit_assign( &mut self, place: &Place<'tcx>, rvalue: &Rvalue<'tcx>, location: Location, )

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fn visit_assert_message( &mut self, msg: &AssertKind<Operand<'tcx>>, location: Location, )

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fn visit_ascribe_user_ty( &mut self, place: &Place<'tcx>, variance: Variance, user_ty: &UserTypeProjection, location: Location, )

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fn visit_coverage(&mut self, kind: &CoverageKind, location: Location)

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fn visit_retag( &mut self, kind: RetagKind, place: &Place<'tcx>, location: Location, )

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fn visit_place( &mut self, place: &Place<'tcx>, context: PlaceContext, location: Location, )

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fn visit_projection( &mut self, place_ref: PlaceRef<'tcx>, context: PlaceContext, location: Location, )

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fn visit_projection_elem( &mut self, place_ref: PlaceRef<'tcx>, elem: ProjectionElem<Local, Ty<'tcx>>, context: PlaceContext, location: Location, )

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fn super_place( &mut self, place: &Place<'tcx>, context: PlaceContext, location: Location, )

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fn super_projection( &mut self, place_ref: PlaceRef<'tcx>, context: PlaceContext, location: Location, )

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fn super_projection_elem( &mut self, _place_ref: PlaceRef<'tcx>, elem: ProjectionElem<Local, Ty<'tcx>>, _context: PlaceContext, location: Location, )

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fn visit_const_operand( &mut self, constant: &ConstOperand<'tcx>, location: Location, )

This is called for every constant in the MIR body and every required_consts (i.e., including consts that have been dead-code-eliminated).
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fn visit_ty_const(&mut self, ct: Const<'tcx>, location: Location)

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fn visit_span(&mut self, span: Span)

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fn visit_ty(&mut self, ty: Ty<'tcx>, _: TyContext)

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fn visit_user_type_projection(&mut self, ty: &UserTypeProjection)

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fn visit_user_type_annotation( &mut self, index: UserTypeAnnotationIndex, ty: &CanonicalUserTypeAnnotation<'tcx>, )

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fn visit_region(&mut self, region: Region<'tcx>, _: Location)

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fn visit_args( &mut self, args: &&'tcx RawList<(), GenericArg<'tcx>>, _: Location, )

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fn visit_local_decl(&mut self, local: Local, local_decl: &LocalDecl<'tcx>)

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fn visit_var_debug_info(&mut self, var_debug_info: &VarDebugInfo<'tcx>)

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fn visit_local( &mut self, _local: Local, _context: PlaceContext, _location: Location, )

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fn visit_source_scope(&mut self, scope: SourceScope)

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fn super_body(&mut self, body: &Body<'tcx>)

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fn super_basic_block_data( &mut self, block: BasicBlock, data: &BasicBlockData<'tcx>, )

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fn super_source_scope_data(&mut self, scope_data: &SourceScopeData<'tcx>)

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fn super_statement(&mut self, statement: &Statement<'tcx>, location: Location)

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fn super_assign( &mut self, place: &Place<'tcx>, rvalue: &Rvalue<'tcx>, location: Location, )

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fn super_terminator( &mut self, terminator: &Terminator<'tcx>, location: Location, )

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fn super_assert_message( &mut self, msg: &AssertKind<Operand<'tcx>>, location: Location, )

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fn super_rvalue(&mut self, rvalue: &Rvalue<'tcx>, location: Location)

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fn super_operand(&mut self, operand: &Operand<'tcx>, location: Location)

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fn super_ascribe_user_ty( &mut self, place: &Place<'tcx>, variance: Variance, user_ty: &UserTypeProjection, location: Location, )

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fn super_coverage(&mut self, _kind: &CoverageKind, _location: Location)

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fn super_retag( &mut self, _kind: RetagKind, place: &Place<'tcx>, location: Location, )

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fn super_local_decl(&mut self, local: Local, local_decl: &LocalDecl<'tcx>)

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fn super_var_debug_info(&mut self, var_debug_info: &VarDebugInfo<'tcx>)

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fn super_source_scope(&mut self, _scope: SourceScope)

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fn super_const_operand( &mut self, constant: &ConstOperand<'tcx>, location: Location, )

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fn super_ty_const(&mut self, _ct: Const<'tcx>, _location: Location)

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fn super_span(&mut self, _span: Span)

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fn super_source_info(&mut self, source_info: &SourceInfo)

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fn super_user_type_projection(&mut self, _ty: &UserTypeProjection)

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fn super_user_type_annotation( &mut self, _index: UserTypeAnnotationIndex, ty: &CanonicalUserTypeAnnotation<'tcx>, )

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fn super_ty(&mut self, _ty: Ty<'tcx>)

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fn super_region(&mut self, _region: Region<'tcx>)

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fn super_args(&mut self, _args: &&'tcx RawList<(), GenericArg<'tcx>>)

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fn visit_location(&mut self, body: &Body<'tcx>, location: Location)

Auto Trait Implementations§

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impl<'mir, 'tcx> !DynSend for Checker<'mir, 'tcx>

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impl<'mir, 'tcx> !DynSync for Checker<'mir, 'tcx>

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impl<'mir, 'tcx> Freeze for Checker<'mir, 'tcx>

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impl<'mir, 'tcx> !RefUnwindSafe for Checker<'mir, 'tcx>

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impl<'mir, 'tcx> !Send for Checker<'mir, 'tcx>

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impl<'mir, 'tcx> !Sync for Checker<'mir, 'tcx>

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impl<'mir, 'tcx> Unpin for Checker<'mir, 'tcx>

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impl<'mir, 'tcx> !UnwindSafe for Checker<'mir, 'tcx>

Blanket Implementations§

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impl<T> Aligned for T

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const ALIGN: Alignment = _

Alignment of Self.
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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T, R> CollectAndApply<T, R> for T

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fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to f(&iter.collect::<Vec<_>>()).

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type Output = R

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impl<T> Filterable for T

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fn filterable( self, filter_name: &'static str, ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>

Creates a filterable data provider with the given name for debugging. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<P> IntoQueryParam<P> for P

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impl<T> MaybeResult<T> for T

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type Error = !

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fn from(_: Result<T, <T as MaybeResult<T>>::Error>) -> T

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fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>

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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<I, T, U> Upcast<I, U> for T
where U: UpcastFrom<I, T>,

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fn upcast(self, interner: I) -> U

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impl<I, T> UpcastFrom<I, T> for T

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fn upcast_from(from: T, _tcx: I) -> T

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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<Tcx, T> Value<Tcx> for T
where Tcx: DepContext,

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default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed, ) -> T

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<'a, T> Captures<'a> for T
where T: ?Sized,

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impl<T> ErasedDestructor for T
where T: 'static,

Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 496 bytes