1 use crate::context::{EarlyContext, LateContext};
3 use rustc_data_structures::sync;
5 use rustc_session::lint::builtin::HardwiredLints;
6 use rustc_session::lint::LintPass;
11 macro_rules! late_lint_methods {
12 ($macro:path, $args:tt, [$hir:tt]) => (
13 $macro!($args, [$hir], [
14 fn check_param(a: &$hir hir::Param<$hir>);
15 fn check_body(a: &$hir hir::Body<$hir>);
16 fn check_body_post(a: &$hir hir::Body<$hir>);
17 fn check_name(a: Span, b: ast::Name);
18 fn check_crate(a: &$hir hir::Crate<$hir>);
19 fn check_crate_post(a: &$hir hir::Crate<$hir>);
20 fn check_mod(a: &$hir hir::Mod<$hir>, b: Span, c: hir::HirId);
21 fn check_mod_post(a: &$hir hir::Mod<$hir>, b: Span, c: hir::HirId);
22 fn check_foreign_item(a: &$hir hir::ForeignItem<$hir>);
23 fn check_foreign_item_post(a: &$hir hir::ForeignItem<$hir>);
24 fn check_item(a: &$hir hir::Item<$hir>);
25 fn check_item_post(a: &$hir hir::Item<$hir>);
26 fn check_local(a: &$hir hir::Local<$hir>);
27 fn check_block(a: &$hir hir::Block<$hir>);
28 fn check_block_post(a: &$hir hir::Block<$hir>);
29 fn check_stmt(a: &$hir hir::Stmt<$hir>);
30 fn check_arm(a: &$hir hir::Arm<$hir>);
31 fn check_pat(a: &$hir hir::Pat<$hir>);
32 fn check_expr(a: &$hir hir::Expr<$hir>);
33 fn check_expr_post(a: &$hir hir::Expr<$hir>);
34 fn check_ty(a: &$hir hir::Ty<$hir>);
35 fn check_generic_param(a: &$hir hir::GenericParam<$hir>);
36 fn check_generics(a: &$hir hir::Generics<$hir>);
37 fn check_where_predicate(a: &$hir hir::WherePredicate<$hir>);
38 fn check_poly_trait_ref(a: &$hir hir::PolyTraitRef<$hir>, b: hir::TraitBoundModifier);
40 a: rustc_hir::intravisit::FnKind<$hir>,
41 b: &$hir hir::FnDecl<$hir>,
42 c: &$hir hir::Body<$hir>,
46 a: rustc_hir::intravisit::FnKind<$hir>,
47 b: &$hir hir::FnDecl<$hir>,
48 c: &$hir hir::Body<$hir>,
52 fn check_trait_item(a: &$hir hir::TraitItem<$hir>);
53 fn check_trait_item_post(a: &$hir hir::TraitItem<$hir>);
54 fn check_impl_item(a: &$hir hir::ImplItem<$hir>);
55 fn check_impl_item_post(a: &$hir hir::ImplItem<$hir>);
56 fn check_struct_def(a: &$hir hir::VariantData<$hir>);
57 fn check_struct_def_post(a: &$hir hir::VariantData<$hir>);
58 fn check_struct_field(a: &$hir hir::StructField<$hir>);
59 fn check_variant(a: &$hir hir::Variant<$hir>);
60 fn check_variant_post(a: &$hir hir::Variant<$hir>);
61 fn check_lifetime(a: &$hir hir::Lifetime);
62 fn check_path(a: &$hir hir::Path<$hir>, b: hir::HirId);
63 fn check_attribute(a: &$hir ast::Attribute);
65 /// Called when entering a syntax node that can have lint attributes such
66 /// as `#[allow(...)]`. Called with *all* the attributes of that node.
67 fn enter_lint_attrs(a: &$hir [ast::Attribute]);
69 /// Counterpart to `enter_lint_attrs`.
70 fn exit_lint_attrs(a: &$hir [ast::Attribute]);
75 /// Trait for types providing lint checks.
77 /// Each `check` method checks a single syntax node, and should not
78 /// invoke methods recursively (unlike `Visitor`). By default they
81 // FIXME: eliminate the duplication with `Visitor`. But this also
82 // contains a few lint-specific methods with no equivalent in `Visitor`.
84 macro_rules! expand_lint_pass_methods {
85 ($context:ty, [$($(#[$attr:meta])* fn $name:ident($($param:ident: $arg:ty),*);)*]) => (
86 $(#[inline(always)] fn $name(&mut self, _: $context, $(_: $arg),*) {})*
90 macro_rules! declare_late_lint_pass {
91 ([], [$hir:tt], [$($methods:tt)*]) => (
92 pub trait LateLintPass<'a, $hir>: LintPass {
93 expand_lint_pass_methods!(&LateContext<'a, $hir>, [$($methods)*]);
98 late_lint_methods!(declare_late_lint_pass, [], ['tcx]);
100 impl LateLintPass<'_, '_> for HardwiredLints {}
103 macro_rules! expand_combined_late_lint_pass_method {
104 ([$($passes:ident),*], $self: ident, $name: ident, $params:tt) => ({
105 $($self.$passes.$name $params;)*
110 macro_rules! expand_combined_late_lint_pass_methods {
111 ($passes:tt, [$($(#[$attr:meta])* fn $name:ident($($param:ident: $arg:ty),*);)*]) => (
112 $(fn $name(&mut self, context: &LateContext<'a, 'tcx>, $($param: $arg),*) {
113 expand_combined_late_lint_pass_method!($passes, self, $name, (context, $($param),*));
119 macro_rules! declare_combined_late_lint_pass {
120 ([$v:vis $name:ident, [$($passes:ident: $constructor:expr,)*]], [$hir:tt], $methods:tt) => (
121 #[allow(non_snake_case)]
123 $($passes: $passes,)*
127 $v fn new() -> Self {
129 $($passes: $constructor,)*
133 $v fn get_lints() -> LintArray {
134 let mut lints = Vec::new();
135 $(lints.extend_from_slice(&$passes::get_lints());)*
140 impl<'a, 'tcx> LateLintPass<'a, 'tcx> for $name {
141 expand_combined_late_lint_pass_methods!([$($passes),*], $methods);
144 #[allow(rustc::lint_pass_impl_without_macro)]
145 impl LintPass for $name {
146 fn name(&self) -> &'static str {
154 macro_rules! early_lint_methods {
155 ($macro:path, $args:tt) => (
157 fn check_param(a: &ast::Param);
158 fn check_ident(a: ast::Ident);
159 fn check_crate(a: &ast::Crate);
160 fn check_crate_post(a: &ast::Crate);
161 fn check_mod(a: &ast::Mod, b: Span, c: ast::NodeId);
162 fn check_mod_post(a: &ast::Mod, b: Span, c: ast::NodeId);
163 fn check_foreign_item(a: &ast::ForeignItem);
164 fn check_foreign_item_post(a: &ast::ForeignItem);
165 fn check_item(a: &ast::Item);
166 fn check_item_post(a: &ast::Item);
167 fn check_local(a: &ast::Local);
168 fn check_block(a: &ast::Block);
169 fn check_block_post(a: &ast::Block);
170 fn check_stmt(a: &ast::Stmt);
171 fn check_arm(a: &ast::Arm);
172 fn check_pat(a: &ast::Pat);
173 fn check_pat_post(a: &ast::Pat);
174 fn check_expr(a: &ast::Expr);
175 fn check_expr_post(a: &ast::Expr);
176 fn check_ty(a: &ast::Ty);
177 fn check_generic_param(a: &ast::GenericParam);
178 fn check_generics(a: &ast::Generics);
179 fn check_where_predicate(a: &ast::WherePredicate);
180 fn check_poly_trait_ref(a: &ast::PolyTraitRef,
181 b: &ast::TraitBoundModifier);
182 fn check_fn(a: syntax::visit::FnKind<'_>, c: Span, d_: ast::NodeId);
184 a: syntax::visit::FnKind<'_>,
188 fn check_trait_item(a: &ast::AssocItem);
189 fn check_trait_item_post(a: &ast::AssocItem);
190 fn check_impl_item(a: &ast::AssocItem);
191 fn check_impl_item_post(a: &ast::AssocItem);
192 fn check_struct_def(a: &ast::VariantData);
193 fn check_struct_def_post(a: &ast::VariantData);
194 fn check_struct_field(a: &ast::StructField);
195 fn check_variant(a: &ast::Variant);
196 fn check_variant_post(a: &ast::Variant);
197 fn check_lifetime(a: &ast::Lifetime);
198 fn check_path(a: &ast::Path, b: ast::NodeId);
199 fn check_attribute(a: &ast::Attribute);
200 fn check_mac_def(a: &ast::MacroDef, b: ast::NodeId);
201 fn check_mac(a: &ast::Mac);
203 /// Called when entering a syntax node that can have lint attributes such
204 /// as `#[allow(...)]`. Called with *all* the attributes of that node.
205 fn enter_lint_attrs(a: &[ast::Attribute]);
207 /// Counterpart to `enter_lint_attrs`.
208 fn exit_lint_attrs(a: &[ast::Attribute]);
213 macro_rules! expand_early_lint_pass_methods {
214 ($context:ty, [$($(#[$attr:meta])* fn $name:ident($($param:ident: $arg:ty),*);)*]) => (
215 $(#[inline(always)] fn $name(&mut self, _: $context, $(_: $arg),*) {})*
219 macro_rules! declare_early_lint_pass {
220 ([], [$($methods:tt)*]) => (
221 pub trait EarlyLintPass: LintPass {
222 expand_early_lint_pass_methods!(&EarlyContext<'_>, [$($methods)*]);
227 early_lint_methods!(declare_early_lint_pass, []);
230 macro_rules! expand_combined_early_lint_pass_method {
231 ([$($passes:ident),*], $self: ident, $name: ident, $params:tt) => ({
232 $($self.$passes.$name $params;)*
237 macro_rules! expand_combined_early_lint_pass_methods {
238 ($passes:tt, [$($(#[$attr:meta])* fn $name:ident($($param:ident: $arg:ty),*);)*]) => (
239 $(fn $name(&mut self, context: &EarlyContext<'_>, $($param: $arg),*) {
240 expand_combined_early_lint_pass_method!($passes, self, $name, (context, $($param),*));
246 macro_rules! declare_combined_early_lint_pass {
247 ([$v:vis $name:ident, [$($passes:ident: $constructor:expr,)*]], $methods:tt) => (
248 #[allow(non_snake_case)]
250 $($passes: $passes,)*
254 $v fn new() -> Self {
256 $($passes: $constructor,)*
260 $v fn get_lints() -> LintArray {
261 let mut lints = Vec::new();
262 $(lints.extend_from_slice(&$passes::get_lints());)*
267 impl EarlyLintPass for $name {
268 expand_combined_early_lint_pass_methods!([$($passes),*], $methods);
271 #[allow(rustc::lint_pass_impl_without_macro)]
272 impl LintPass for $name {
273 fn name(&self) -> &'static str {
280 /// A lint pass boxed up as a trait object.
281 pub type EarlyLintPassObject = Box<dyn EarlyLintPass + sync::Send + sync::Sync + 'static>;
282 pub type LateLintPassObject =
283 Box<dyn for<'a, 'tcx> LateLintPass<'a, 'tcx> + sync::Send + sync::Sync + 'static>;