Struct rustc::lint::LateContext

pub struct LateContext<'a, 'tcx: 'a> {
    pub tcx: TyCtxt<'a, 'tcx, 'tcx>,
    pub tables: &'a TypeckTables<'tcx>,
    pub param_env: ParamEnv<'tcx>,
    pub access_levels: &'a AccessLevels,
    pub generics: Option<&'tcx Generics>,
    // some fields omitted
}

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Context for lint checking after type checking.

Fields

tcx: TyCtxt<'a, 'tcx, 'tcx>

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Type context we're checking in.

tables: &'a TypeckTables<'tcx>

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Side-tables for the body we are in.

param_env: ParamEnv<'tcx>

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Parameter environment for the item we are in.

access_levels: &'a AccessLevels

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Items accessible from the crate being checked.

generics: Option<&'tcx Generics>

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Generic type parameters in scope for the item we are in.

Trait Implementations

impl<'a, 'tcx> LintContext<'tcx> for LateContext<'a, 'tcx>

type PassObject = LateLintPassObject

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fn sess(&self) -> &Session

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Get the overall compiler Session object.

fn lints(&self) -> &LintStore

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fn lint_sess(&self) -> &LintSession<'tcx, Self::PassObject>

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fn lint_sess_mut(&mut self) -> &mut LintSession<'tcx, Self::PassObject>

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fn enter_attrs(&mut self, attrs: &'tcx [Attribute])

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fn exit_attrs(&mut self, attrs: &'tcx [Attribute])

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fn lookup<S: Into<MultiSpan>>(
    &self,
    lint: &'static Lint,
    span: Option<S>,
    msg: &str
) -> DiagnosticBuilder

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fn with_lint_attrs<F>(&mut self, id: NodeId, attrs: &'tcx [Attribute], f: F) where
    F: FnOnce(&mut Self), 

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Merge the lints specified by any lint attributes into the current lint context, call the provided function, then reset the lints in effect to their previous state.

fn lookup_and_emit<S: Into<MultiSpan>>(
    &self,
    lint: &'static Lint,
    span: Option<S>,
    msg: &str
)

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fn span_lint<S: Into<MultiSpan>>(&self, lint: &'static Lint, span: S, msg: &str)

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Emit a lint at the appropriate level, for a particular span.

fn struct_span_lint<S: Into<MultiSpan>>(
    &self,
    lint: &'static Lint,
    span: S,
    msg: &str
) -> DiagnosticBuilder

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fn span_lint_note(
    &self,
    lint: &'static Lint,
    span: Span,
    msg: &str,
    note_span: Span,
    note: &str
)

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Emit a lint and note at the appropriate level, for a particular span.

fn span_lint_help(&self, lint: &'static Lint, span: Span, msg: &str, help: &str)

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Emit a lint and help at the appropriate level, for a particular span.

fn lint(&self, lint: &'static Lint, msg: &str)

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Emit a lint at the appropriate level, with no associated span.

impl<'a, 'tcx> LayoutOf<Ty<'tcx>> for &'a LateContext<'a, 'tcx>

type TyLayout = Result<TyLayout<'tcx>, LayoutError<'tcx>>

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fn layout_of(self, ty: Ty<'tcx>) -> Self::TyLayout

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impl<'a, 'tcx> Visitor<'tcx> for LateContext<'a, 'tcx>

fn nested_visit_map<'this>(&'this mut self) -> NestedVisitorMap<'this, 'tcx>

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Because lints are scoped lexically, we want to walk nested items in the context of the outer item, so enable deep-walking.

fn visit_nested_body(&mut self, body: BodyId)

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Invoked to visit the body of a function, method or closure. Like visit_nested_item, does nothing by default unless you override nested_visit_map to return Some(_), in which case it will walk the body.

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

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fn visit_item(&mut self, it: &'tcx Item)

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Visit the top-level item and (optionally) nested items / impl items. See visit_nested_item for details.

fn visit_foreign_item(&mut self, it: &'tcx ForeignItem)

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fn visit_pat(&mut self, p: &'tcx Pat)

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fn visit_expr(&mut self, e: &'tcx Expr)

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fn visit_stmt(&mut self, s: &'tcx Stmt)

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fn visit_fn(
    &mut self,
    fk: FnKind<'tcx>,
    decl: &'tcx FnDecl,
    body_id: BodyId,
    span: Span,
    id: NodeId
)

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fn visit_variant_data(
    &mut self,
    s: &'tcx VariantData,
    name: Name,
    g: &'tcx Generics,
    item_id: NodeId,
    _: Span
)

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fn visit_struct_field(&mut self, s: &'tcx StructField)

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fn visit_variant(
    &mut self,
    v: &'tcx Variant,
    g: &'tcx Generics,
    item_id: NodeId
)

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fn visit_ty(&mut self, t: &'tcx Ty)

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fn visit_name(&mut self, sp: Span, name: Name)

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fn visit_mod(&mut self, m: &'tcx Mod, s: Span, n: NodeId)

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fn visit_local(&mut self, l: &'tcx Local)

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fn visit_block(&mut self, b: &'tcx Block)

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fn visit_arm(&mut self, a: &'tcx Arm)

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fn visit_decl(&mut self, d: &'tcx Decl)

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fn visit_generics(&mut self, g: &'tcx Generics)

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fn visit_trait_item(&mut self, trait_item: &'tcx TraitItem)

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fn visit_impl_item(&mut self, impl_item: &'tcx ImplItem)

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fn visit_lifetime(&mut self, lt: &'tcx Lifetime)

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fn visit_lifetime_def(&mut self, lt: &'tcx LifetimeDef)

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fn visit_path(&mut self, p: &'tcx Path, id: NodeId)

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

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fn visit_nested_item(&mut self, id: ItemId)

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Invoked when a nested item is encountered. By default does nothing unless you override nested_visit_map to return Some(_), in which case it will walk the item. You probably don't want to override this method -- instead, override nested_visit_map or use the "shallow" or "deep" visit patterns described on itemlikevisit::ItemLikeVisitor. The only reason to override this method is if you want a nested pattern but cannot supply a Map; see nested_visit_map for advice.

fn visit_nested_trait_item(&mut self, id: TraitItemId)

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Like visit_nested_item(), but for trait items. See visit_nested_item() for advice on when to override this method.

fn visit_nested_impl_item(&mut self, id: ImplItemId)

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Like visit_nested_item(), but for impl items. See visit_nested_item() for advice on when to override this method.

fn as_deep_visitor<'s>(&'s mut self) -> DeepVisitor<'s, Self>

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When invoking visit_all_item_likes(), you need to supply an item-like visitor. This method converts a "intra-visit" visitor into an item-like visitor that walks the entire tree. If you use this, you probably don't want to process the contents of nested item-like things, since the outer loop will visit them as well.

fn visit_id(&mut self, _node_id: NodeId)

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fn visit_def_mention(&mut self, _def: Def)

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fn visit_where_predicate(&mut self, predicate: &'v WherePredicate)

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fn visit_fn_decl(&mut self, fd: &'v FnDecl)

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fn visit_trait_item_ref(&mut self, ii: &'v TraitItemRef)

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fn visit_impl_item_ref(&mut self, ii: &'v ImplItemRef)

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fn visit_trait_ref(&mut self, t: &'v TraitRef)

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fn visit_ty_param_bound(&mut self, bounds: &'v TyParamBound)

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fn visit_poly_trait_ref(&mut self, t: &'v PolyTraitRef, m: TraitBoundModifier)

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fn visit_enum_def(
    &mut self,
    enum_definition: &'v EnumDef,
    generics: &'v Generics,
    item_id: NodeId,
    _: Span
)

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fn visit_qpath(&mut self, qpath: &'v QPath, id: NodeId, span: Span)

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fn visit_path_segment(&mut self, path_span: Span, path_segment: &'v PathSegment)

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fn visit_path_parameters(
    &mut self,
    path_span: Span,
    path_parameters: &'v PathParameters
)

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fn visit_assoc_type_binding(&mut self, type_binding: &'v TypeBinding)

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fn visit_macro_def(&mut self, macro_def: &'v MacroDef)

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fn visit_vis(&mut self, vis: &'v Visibility)

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fn visit_associated_item_kind(&mut self, kind: &'v AssociatedItemKind)

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fn visit_defaultness(&mut self, defaultness: &'v Defaultness)

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