Struct rustc_ast_passes::ast_validation::AstValidator

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struct AstValidator<'a> {
    session: &'a Session,
    features: &'a Features,
    extern_mod: Option<Span>,
    outer_trait_or_trait_impl: Option<TraitOrTraitImpl>,
    has_proc_macro_decls: bool,
    outer_impl_trait: Option<Span>,
    disallow_tilde_const: Option<TildeConstReason>,
    is_impl_trait_banned: bool,
    extern_mod_safety: Option<Safety>,
    lint_buffer: &'a mut LintBuffer,
}

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§session: &'a Session§features: &'a Features§extern_mod: 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: 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>§is_impl_trait_banned: bool

Used to ban impl Trait in path projections like <impl Iterator>::Item or Foo::Bar<impl Trait>

§extern_mod_safety: Option<Safety>

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

§lint_buffer: &'a mut LintBuffer

Implementations§

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impl<'a> AstValidator<'a>

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

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

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fn with_in_extern_mod( &mut self, extern_mod_safety: Safety, f: impl FnOnce(&mut Self), )

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fn with_banned_impl_trait(&mut self, f: impl FnOnce(&mut Self))

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

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

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

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

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fn visit_struct_field_def(&mut self, field: &'a FieldDef)

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

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

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

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fn check_unnamed_field_ty(&self, ty: &Ty, span: Span)

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fn deny_anon_struct_or_union(&self, ty: &Ty)

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fn deny_unnamed_field(&self, field: &FieldDef)

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

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

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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

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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.

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fn check_decl_attrs(&self, fn_decl: &FnDecl)

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

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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.

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

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

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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()

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

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

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

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

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

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fn current_extern_span(&self) -> Span

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fn check_foreign_fn_headerless(&self, _: FnHeader)

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

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fn check_foreign_item_ascii_only(&self, ident: Ident)

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

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

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

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fn check_mod_file_item_asciionly(&self, ident: Ident)

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

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

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

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

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

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fn check_generic_args_before_constraints(&self, data: &AngleBracketedArgs)

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

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

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

Trait Implementations§

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

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

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

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fn visit_field_def(&mut self, field: &'a FieldDef)

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

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

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

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

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

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

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

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type Result = ()

The result type of the visit_* methods. Can be either (), or ControlFlow<T>.
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fn visit_ident(&mut self, _ident: Ident) -> Self::Result

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

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

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

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

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

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

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

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

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

This method is a hack to workaround unstable of stmt_expr_attributes. It can be removed once that feature is stabilized.
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fn visit_expr_post(&mut self, _ex: &'ast Expr) -> Self::Result

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

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

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

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

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fn visit_precise_capturing_arg(&mut self, arg: &'ast PreciseCapturingArg)

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

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

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fn visit_enum_def(&mut self, enum_definition: &'ast EnumDef) -> Self::Result

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

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fn visit_variant_discr(&mut self, discr: &'ast AnonConst) -> Self::Result

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

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

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

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fn visit_mac_def(&mut self, _mac: &'ast MacroDef, _id: NodeId) -> Self::Result

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

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fn visit_use_tree( &mut self, use_tree: &'ast UseTree, id: NodeId, _nested: bool, ) -> Self::Result

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

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

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

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

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

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fn visit_fn_header(&mut self, _header: &'ast FnHeader) -> Self::Result

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

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

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

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

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

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

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fn visit_capture_by(&mut self, _capture_by: &'ast CaptureBy) -> Self::Result

Auto Trait Implementations§

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impl<'a> Freeze for AstValidator<'a>

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impl<'a> !RefUnwindSafe for AstValidator<'a>

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impl<'a> !Send for AstValidator<'a>

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impl<'a> !Sync for AstValidator<'a>

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impl<'a> Unpin for AstValidator<'a>

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impl<'a> !UnwindSafe for AstValidator<'a>

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<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<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,

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impl<T> MaybeSendSync for T

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