Struct rustc_mir::borrow_check::type_check::TypeVerifier

struct TypeVerifier<'a, 'b, 'tcx> {
    cx: &'a mut TypeChecker<'b, 'tcx>,
    body: &'b Body<'tcx>,
    promoted: &'b IndexVec<Promoted, Body<'tcx>>,
    last_span: Span,
    errors_reported: bool,
}

Verifies that MIR types are sane to not crash further checks.

The sanitize_XYZ methods here take an MIR object and compute its type, calling span_mirbug and returning an error type if there is a problem.

Fields

cx: &'a mut TypeChecker<'b, 'tcx>

body: &'b Body<'tcx>

promoted: &'b IndexVec<Promoted, Body<'tcx>>

last_span: Span

errors_reported: bool

Implementations

impl<'a, 'b, 'tcx> TypeVerifier<'a, 'b, 'tcx>

fn new(
    cx: &'a mut TypeChecker<'b, 'tcx>,
    body: &'b Body<'tcx>,
    promoted: &'b IndexVec<Promoted, Body<'tcx>>
) -> Self

fn tcx(&self) -> TyCtxt<'tcx>

fn sanitize_type(&mut self, parent: &dyn Debug, ty: Ty<'tcx>) -> Ty<'tcx>

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

Checks that the types internal to the place match up with what would be expected.

fn sanitize_promoted(
    &mut self,
    promoted_body: &'b Body<'tcx>,
    location: Location
)

fn sanitize_projection(
    &mut self,
    base: PlaceTy<'tcx>,
    pi: PlaceElem<'tcx>,
    place: &Place<'tcx>,
    location: Location
) -> PlaceTy<'tcx>

fn error(&mut self) -> Ty<'tcx>

fn field_ty(
    &mut self,
    parent: &dyn Debug,
    base_ty: PlaceTy<'tcx>,
    field: Field,
    location: Location
) -> Result<Ty<'tcx>, FieldAccessError>

Trait Implementations

impl<'a, 'b, 'tcx> Visitor<'tcx> for TypeVerifier<'a, 'b, 'tcx>

fn visit_span(&mut self, span: &Span)

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

fn visit_constant(&mut self, constant: &Constant<'tcx>, location: Location)

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

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

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

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

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

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

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

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

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

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

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

fn visit_coverage(&mut self, coverage: &Coverage, location: Location)

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

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

fn visit_projection_elem(
    &mut self,
    local: Local,
    proj_base: &[ProjectionElem<Local, &'tcx TyS<'tcx>>],
    elem: ProjectionElem<Local, &'tcx TyS<'tcx>>,
    context: PlaceContext,
    location: Location
)

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

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

fn super_projection_elem(
    &mut self,
    _local: Local,
    _proj_base: &[ProjectionElem<Local, &'tcx TyS<'tcx>>],
    elem: ProjectionElem<Local, &'tcx TyS<'tcx>>,
    _context: PlaceContext,
    location: Location
)

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

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

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

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

fn visit_region(&mut self, region: &&'tcx RegionKind, Location)

fn visit_const(&mut self, constant: &&'tcx Const<'tcx>, Location)

fn visit_substs(&mut self, substs: &&'tcx List<GenericArg<'tcx>>, Location)

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

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

fn visit_source_scope(&mut self, scope: &SourceScope)

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

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

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

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

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

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

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

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

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

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

fn super_coverage(&mut self, _coverage: &Coverage, _location: Location)

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

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

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

fn super_source_scope(&mut self, _scope: &SourceScope)

fn super_constant(&mut self, constant: &Constant<'tcx>, location: Location)

fn super_span(&mut self, _span: &Span)

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

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

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

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

fn super_region(&mut self, _region: &&'tcx RegionKind)

fn super_const(&mut self, _const: &&'tcx Const<'tcx>)

fn super_substs(&mut self, _substs: &&'tcx List<GenericArg<'tcx>>)

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