1 use rustc::hir::intravisit;
2 use rustc::lint::{LintLevelMap, LintLevelSets, LintLevelsBuilder, LintStore};
3 use rustc::ty::query::Providers;
6 use rustc_hir::def_id::{CrateNum, LOCAL_CRATE};
9 pub use rustc_session::lint::{FutureIncompatibleInfo, Level, Lint, LintId};
11 fn lint_levels(tcx: TyCtxt<'_>, cnum: CrateNum) -> &LintLevelMap {
12 assert_eq!(cnum, LOCAL_CRATE);
13 let store = &tcx.lint_store;
14 let mut builder = LintLevelMapBuilder {
15 levels: LintLevelSets::builder(tcx.sess, false, &store),
19 let krate = tcx.hir().krate();
21 let push = builder.levels.push(&krate.attrs, &store);
22 builder.levels.register_id(hir::CRATE_HIR_ID);
23 for macro_def in krate.exported_macros {
24 builder.levels.register_id(macro_def.hir_id);
26 intravisit::walk_crate(&mut builder, krate);
27 builder.levels.pop(push);
29 tcx.arena.alloc(builder.levels.build_map())
32 struct LintLevelMapBuilder<'a, 'tcx> {
33 levels: LintLevelsBuilder<'tcx>,
38 impl LintLevelMapBuilder<'_, '_> {
39 fn with_lint_attrs<F>(&mut self, id: hir::HirId, attrs: &[ast::Attribute], f: F)
43 let push = self.levels.push(attrs, self.store);
45 self.levels.register_id(id);
48 self.levels.pop(push);
52 impl<'tcx> intravisit::Visitor<'tcx> for LintLevelMapBuilder<'_, 'tcx> {
53 fn nested_visit_map<'this>(&'this mut self) -> intravisit::NestedVisitorMap<'this, 'tcx> {
54 intravisit::NestedVisitorMap::All(&self.tcx.hir())
57 fn visit_param(&mut self, param: &'tcx hir::Param<'tcx>) {
58 self.with_lint_attrs(param.hir_id, ¶m.attrs, |builder| {
59 intravisit::walk_param(builder, param);
63 fn visit_item(&mut self, it: &'tcx hir::Item<'tcx>) {
64 self.with_lint_attrs(it.hir_id, &it.attrs, |builder| {
65 intravisit::walk_item(builder, it);
69 fn visit_foreign_item(&mut self, it: &'tcx hir::ForeignItem<'tcx>) {
70 self.with_lint_attrs(it.hir_id, &it.attrs, |builder| {
71 intravisit::walk_foreign_item(builder, it);
75 fn visit_expr(&mut self, e: &'tcx hir::Expr<'tcx>) {
76 self.with_lint_attrs(e.hir_id, &e.attrs, |builder| {
77 intravisit::walk_expr(builder, e);
81 fn visit_struct_field(&mut self, s: &'tcx hir::StructField<'tcx>) {
82 self.with_lint_attrs(s.hir_id, &s.attrs, |builder| {
83 intravisit::walk_struct_field(builder, s);
89 v: &'tcx hir::Variant<'tcx>,
90 g: &'tcx hir::Generics<'tcx>,
93 self.with_lint_attrs(v.id, &v.attrs, |builder| {
94 intravisit::walk_variant(builder, v, g, item_id);
98 fn visit_local(&mut self, l: &'tcx hir::Local<'tcx>) {
99 self.with_lint_attrs(l.hir_id, &l.attrs, |builder| {
100 intravisit::walk_local(builder, l);
104 fn visit_arm(&mut self, a: &'tcx hir::Arm<'tcx>) {
105 self.with_lint_attrs(a.hir_id, &a.attrs, |builder| {
106 intravisit::walk_arm(builder, a);
110 fn visit_trait_item(&mut self, trait_item: &'tcx hir::TraitItem<'tcx>) {
111 self.with_lint_attrs(trait_item.hir_id, &trait_item.attrs, |builder| {
112 intravisit::walk_trait_item(builder, trait_item);
116 fn visit_impl_item(&mut self, impl_item: &'tcx hir::ImplItem<'tcx>) {
117 self.with_lint_attrs(impl_item.hir_id, &impl_item.attrs, |builder| {
118 intravisit::walk_impl_item(builder, impl_item);
123 pub fn provide(providers: &mut Providers<'_>) {
124 providers.lint_levels = lint_levels;