Struct ImproperCTypesVisitor

struct ImproperCTypesVisitor<'a, 'tcx> {
    cx: &'a LateContext<'tcx>,
    mode: CItemKind,
}

Fields

cx: &'a LateContext<'tcx>

mode: CItemKind

Implementations

impl<'a, 'tcx> ImproperCTypesVisitor<'a, 'tcx>

fn check_for_array_ty(&mut self, sp: Span, ty: Ty<'tcx>) -> bool

Check if the type is array and emit an unsafe type lint.

fn check_field_type_for_ffi( &self, acc: &mut CTypesVisitorState<'tcx>, field: &FieldDef, args: GenericArgsRef<'tcx>, ) -> FfiResult<'tcx>

Checks if the given field’s type is “ffi-safe”.

fn check_variant_for_ffi( &self, acc: &mut CTypesVisitorState<'tcx>, ty: Ty<'tcx>, def: AdtDef<'tcx>, variant: &VariantDef, args: GenericArgsRef<'tcx>, ) -> FfiResult<'tcx>

Checks if the given VariantDef’s field types are “ffi-safe”.

fn check_type_for_ffi( &self, acc: &mut CTypesVisitorState<'tcx>, ty: Ty<'tcx>, ) -> FfiResult<'tcx>

Checks if the given type is “ffi-safe” (has a stable, well-defined representation which can be exported to C code).

fn emit_ffi_unsafe_type_lint( &mut self, ty: Ty<'tcx>, sp: Span, note: DiagMessage, help: Option<DiagMessage>, )

fn check_for_opaque_ty(&mut self, sp: Span, ty: Ty<'tcx>) -> bool

fn check_type_for_ffi_and_report_errors( &mut self, sp: Span, ty: Ty<'tcx>, is_static: bool, is_return_type: bool, )

fn check_fn(&mut self, def_id: LocalDefId, decl: &'tcx FnDecl<'_>)

Check if a function’s argument types and result type are “ffi-safe”.

For a external ABI function, argument types and the result type are walked to find fn-ptr types that have external ABIs, as these still need checked.

fn check_foreign_fn(&mut self, def_id: LocalDefId, decl: &'tcx FnDecl<'_>)

Check if a function’s argument types and result type are “ffi-safe”.

fn check_foreign_static(&mut self, id: OwnerId, span: Span)

fn is_internal_abi(&self, abi: ExternAbi) -> bool

fn find_fn_ptr_ty_with_external_abi( &self, hir_ty: &Ty<'tcx>, ty: Ty<'tcx>, ) -> Vec<(Ty<'tcx>, Span)>

Find any fn-ptr types with external ABIs in ty.

For example, Option<extern "C" fn()> returns extern "C" fn()

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: 16 bytes