Struct AstValidator

struct AstValidator<'a> {
    sess: &'a Session,
    features: &'a Features,
    extern_mod_span: Option<Span>,
    outer_trait_or_trait_impl: Option<TraitOrTraitImpl>,
    has_proc_macro_decls: bool,
    outer_impl_trait_span: Option<Span>,
    disallow_tilde_const: Option<TildeConstReason>,
    extern_mod_safety: Option<Safety>,
    extern_mod_abi: Option<ExternAbi>,
    lint_node_id: NodeId,
    is_sdylib_interface: bool,
    lint_buffer: &'a mut LintBuffer,
}

Fields

sess: &'a Session

features: &'a Features

extern_mod_span: Option<Span>

The span of the extern in an extern { ... } block, if any.

outer_trait_or_trait_impl: Option<TraitOrTraitImpl>

has_proc_macro_decls: bool

outer_impl_trait_span: Option<Span>

Used to ban nested impl Trait, e.g., impl Into<impl Debug>. Nested impl Trait is allowed in associated type position, e.g., impl Iterator<Item = impl Debug>.

disallow_tilde_const: Option<TildeConstReason>

extern_mod_safety: Option<Safety>

Used to ban explicit safety on foreign items when the extern block is not marked as unsafe.

extern_mod_abi: Option<ExternAbi>

lint_node_id: NodeId

is_sdylib_interface: bool

lint_buffer: &'a mut LintBuffer

Implementations

impl<'a> AstValidator<'a>

fn with_in_trait_impl( &mut self, trait_: Option<(Const, ImplPolarity, &'a TraitRef)>, f: impl FnOnce(&mut Self), )

fn with_in_trait( &mut self, span: Span, constness_span: Option<Span>, f: impl FnOnce(&mut Self), )

fn with_in_extern_mod( &mut self, extern_mod_safety: Safety, abi: Option<ExternAbi>, f: impl FnOnce(&mut Self), )

fn with_tilde_const( &mut self, disallowed: Option<TildeConstReason>, f: impl FnOnce(&mut Self), )

fn check_type_alias_where_clause_location( &mut self, ty_alias: &TyAlias, ) -> Result<(), WhereClauseBeforeTypeAlias>

fn with_impl_trait( &mut self, outer_span: Option<Span>, f: impl FnOnce(&mut Self), )

fn walk_ty(&mut self, t: &'a Ty)

fn dcx(&self) -> DiagCtxtHandle<'a>

fn visibility_not_permitted( &self, vis: &Visibility, note: VisibilityNotPermittedNote, )

fn check_decl_no_pat( decl: &FnDecl, report_err: impl FnMut(Span, Option<Ident>, bool), )

fn check_trait_fn_not_const(&self, constness: Const, parent: &TraitOrTraitImpl)

fn check_fn_decl(&self, fn_decl: &FnDecl, self_semantic: SelfSemantic)

fn check_decl_num_args(&self, fn_decl: &FnDecl)

Emits fatal error if function declaration has more than u16::MAX arguments Error is fatal to prevent errors during typechecking

fn check_decl_cvariadic_pos(&self, fn_decl: &FnDecl)

Emits an error if a function declaration has a variadic parameter in the beginning or middle of parameter list. Example: fn foo(..., x: i32) will emit an error.

fn check_decl_attrs(&self, fn_decl: &FnDecl)

fn check_decl_self_param(&self, fn_decl: &FnDecl, self_semantic: SelfSemantic)

fn check_extern_fn_signature( &self, abi: ExternAbi, ctxt: FnCtxt, ident: &Ident, sig: &FnSig, )

Check that the signature of this function does not violate the constraints of its ABI.

fn reject_safe_fn(&self, abi: ExternAbi, ctxt: FnCtxt, sig: &FnSig)

fn reject_coroutine(&self, abi: ExternAbi, sig: &FnSig)

fn reject_params_or_return(&self, abi: ExternAbi, ident: &Ident, sig: &FnSig)

fn check_item_safety(&self, span: Span, safety: Safety)

This ensures that items can only be unsafe (or unmarked) outside of extern blocks.

This additionally ensures that within extern blocks, items can only be safe/unsafe inside of a unsafe-adorned extern block.

fn check_fn_ptr_safety(&self, span: Span, safety: Safety)

fn check_defaultness(&self, span: Span, defaultness: Defaultness)

fn ending_semi_or_hi(&self, sp: Span) -> Span

If sp ends with a semicolon, returns it as a Span Otherwise, returns sp.shrink_to_hi()

fn check_type_no_bounds(&self, bounds: &[GenericBound], ctx: &str)

fn check_foreign_ty_genericless( &self, generics: &Generics, where_clauses: &TyAliasWhereClauses, )

fn check_foreign_kind_bodyless( &self, ident: Ident, kind: &str, body_span: Option<Span>, )

fn check_foreign_fn_bodyless(&self, ident: Ident, body: Option<&Block>)

An fn in extern { ... } cannot have a body { ... }.

fn current_extern_span(&self) -> Span

fn check_foreign_fn_headerless(&self, _: FnHeader)

An fn in extern { ... } cannot have qualifiers, e.g. async fn.

fn check_foreign_item_ascii_only(&self, ident: Ident)

An item in extern { ... } cannot use non-ascii identifier.

fn check_c_variadic_type(&self, fk: FnKind<'a>)

Reject invalid C-variadic types.

C-variadics must be:

• Non-const
• Either foreign, or free and unsafe extern "C" semantically

fn check_item_named(&self, ident: Ident, kind: &str)

fn check_nomangle_item_asciionly(&self, ident: Ident, item_span: Span)

fn check_mod_file_item_asciionly(&self, ident: Ident)

fn deny_generic_params(&self, generics: &Generics, ident_span: Span)

fn deny_super_traits(&self, bounds: &GenericBounds, ident_span: Span)

fn deny_where_clause(&self, where_clause: &WhereClause, ident_span: Span)

fn deny_items(&self, trait_items: &[P<AssocItem>], ident_span: Span)

fn correct_generic_order_suggestion(&self, data: &AngleBracketedArgs) -> String

fn check_generic_args_before_constraints(&self, data: &AngleBracketedArgs)

Enforce generic args coming before constraints in <...> of a path segment.

fn visit_ty_common(&mut self, ty: &'a Ty)

fn handle_missing_abi(&mut self, span: Span, id: NodeId)

fn visit_attrs_vis(&mut self, attrs: &'a AttrVec, vis: &'a Visibility)

fn visit_attrs_vis_ident( &mut self, attrs: &'a AttrVec, vis: &'a Visibility, ident: &'a Ident, )

Trait Implementations

impl<'a> Visitor<'a> for AstValidator<'a>

fn visit_attribute(&mut self, attr: &Attribute)

fn visit_ty(&mut self, ty: &'a Ty)

fn visit_item(&mut self, item: &'a Item)

fn visit_foreign_item(&mut self, fi: &'a ForeignItem)

fn visit_generic_args(&mut self, generic_args: &'a GenericArgs)

fn visit_generics(&mut self, generics: &'a Generics)

fn visit_param_bound(&mut self, bound: &'a GenericBound, ctxt: BoundKind)

fn visit_fn(&mut self, fk: FnKind<'a>, span: Span, id: NodeId)

fn visit_assoc_item(&mut self, item: &'a AssocItem, ctxt: AssocCtxt)

type Result = ()

The result type of the visit_* methods. Can be either (), or ControlFlow<T>.

fn visit_ident(&mut self, _: &'a Ident) -> Self::Result

fn visit_foreign_mod(&mut self, nm: &'a ForeignMod) -> Self::Result

fn visit_local(&mut self, l: &'a Local) -> Self::Result

fn visit_block(&mut self, b: &'a Block) -> Self::Result

fn visit_param(&mut self, param: &'a Param) -> Self::Result

fn visit_arm(&mut self, a: &'a Arm) -> Self::Result

fn visit_pat(&mut self, p: &'a Pat) -> Self::Result

fn visit_anon_const(&mut self, c: &'a AnonConst) -> Self::Result

fn visit_expr(&mut self, ex: &'a Expr) -> Self::Result

fn visit_method_receiver_expr(&mut self, ex: &'a Expr) -> Self::Result

This method is a hack to workaround unstable of stmt_expr_attributes. It can be removed once that feature is stabilized.

fn visit_ty_pat(&mut self, t: &'a TyPat) -> Self::Result

fn visit_generic_param(&mut self, param: &'a GenericParam) -> Self::Result

fn visit_closure_binder(&mut self, b: &'a ClosureBinder) -> Self::Result

fn visit_contract(&mut self, c: &'a FnContract) -> Self::Result

fn visit_where_predicate(&mut self, p: &'a WherePredicate) -> Self::Result

fn visit_where_predicate_kind( &mut self, k: &'a WherePredicateKind, ) -> Self::Result

fn visit_trait_ref(&mut self, t: &'a TraitRef) -> Self::Result

fn visit_precise_capturing_arg( &mut self, arg: &'a PreciseCapturingArg, ) -> Self::Result

fn visit_poly_trait_ref(&mut self, t: &'a PolyTraitRef) -> Self::Result

fn visit_variant_data(&mut self, s: &'a VariantData) -> Self::Result

fn visit_field_def(&mut self, s: &'a FieldDef) -> Self::Result

fn visit_variant(&mut self, v: &'a Variant) -> Self::Result

fn visit_label(&mut self, label: &'a Label) -> Self::Result

fn visit_lifetime( &mut self, lifetime: &'a Lifetime, _: LifetimeCtxt, ) -> Self::Result

fn visit_mac_call(&mut self, mac: &'a MacCall) -> Self::Result

fn visit_id(&mut self, _id: NodeId) -> Self::Result

fn visit_macro_def(&mut self, macro_def: &'a MacroDef) -> Self::Result

fn visit_path(&mut self, path: &'a Path) -> Self::Result

fn visit_use_tree(&mut self, use_tree: &'a UseTree) -> Self::Result

fn visit_path_segment(&mut self, path_segment: &'a PathSegment) -> Self::Result

fn visit_generic_arg(&mut self, generic_arg: &'a GenericArg) -> Self::Result

fn visit_assoc_item_constraint( &mut self, constraint: &'a AssocItemConstraint, ) -> Self::Result

fn visit_vis(&mut self, vis: &'a Visibility) -> Self::Result

fn visit_fn_ret_ty(&mut self, ret_ty: &'a FnRetTy) -> Self::Result

fn visit_fn_header(&mut self, header: &'a FnHeader) -> Self::Result

fn visit_expr_field(&mut self, f: &'a ExprField) -> Self::Result

fn visit_pat_field(&mut self, fp: &'a PatField) -> Self::Result

fn visit_crate(&mut self, krate: &'a Crate) -> Self::Result

fn visit_inline_asm(&mut self, asm: &'a InlineAsm) -> Self::Result

fn visit_format_args(&mut self, fmt: &'a FormatArgs) -> Self::Result

fn visit_inline_asm_sym(&mut self, sym: &'a InlineAsmSym) -> Self::Result

fn visit_capture_by(&mut self, capture_by: &'a CaptureBy) -> Self::Result

fn visit_coroutine_kind( &mut self, coroutine_kind: &'a CoroutineKind, ) -> Self::Result

fn visit_fn_decl(&mut self, fn_decl: &'a FnDecl) -> Self::Result

fn visit_qself(&mut self, qs: &'a Option<Box<QSelf>>) -> Self::Result

fn visit_stmt(&mut self, s: &'a Stmt) -> Self::Result

fn visit_nested_use_tree( &mut self, use_tree: &'a UseTree, id: NodeId, ) -> Self::Result

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: 112 bytes