| use crate::context::{EarlyContext, LateContext}; |
| |
| use rustc_ast::ast; |
| use rustc_data_structures::sync; |
| use rustc_hir as hir; |
| use rustc_session::lint::builtin::HardwiredLints; |
| use rustc_session::lint::LintPass; |
| use rustc_span::symbol::{Ident, Symbol}; |
| use rustc_span::Span; |
| |
| #[macro_export] |
| macro_rules! late_lint_methods { |
| ($macro:path, $args:tt, [$hir:tt]) => ( |
| $macro!($args, [$hir], [ |
| fn check_param(a: &$hir hir::Param<$hir>); |
| fn check_body(a: &$hir hir::Body<$hir>); |
| fn check_body_post(a: &$hir hir::Body<$hir>); |
| fn check_name(a: Span, b: Symbol); |
| fn check_crate(a: &$hir hir::Crate<$hir>); |
| fn check_crate_post(a: &$hir hir::Crate<$hir>); |
| fn check_mod(a: &$hir hir::Mod<$hir>, b: Span, c: hir::HirId); |
| fn check_mod_post(a: &$hir hir::Mod<$hir>, b: Span, c: hir::HirId); |
| fn check_foreign_item(a: &$hir hir::ForeignItem<$hir>); |
| fn check_foreign_item_post(a: &$hir hir::ForeignItem<$hir>); |
| fn check_item(a: &$hir hir::Item<$hir>); |
| fn check_item_post(a: &$hir hir::Item<$hir>); |
| fn check_local(a: &$hir hir::Local<$hir>); |
| fn check_block(a: &$hir hir::Block<$hir>); |
| fn check_block_post(a: &$hir hir::Block<$hir>); |
| fn check_stmt(a: &$hir hir::Stmt<$hir>); |
| fn check_arm(a: &$hir hir::Arm<$hir>); |
| fn check_pat(a: &$hir hir::Pat<$hir>); |
| fn check_expr(a: &$hir hir::Expr<$hir>); |
| fn check_expr_post(a: &$hir hir::Expr<$hir>); |
| fn check_ty(a: &$hir hir::Ty<$hir>); |
| fn check_generic_param(a: &$hir hir::GenericParam<$hir>); |
| fn check_generics(a: &$hir hir::Generics<$hir>); |
| fn check_where_predicate(a: &$hir hir::WherePredicate<$hir>); |
| fn check_poly_trait_ref(a: &$hir hir::PolyTraitRef<$hir>, b: hir::TraitBoundModifier); |
| fn check_fn( |
| a: rustc_hir::intravisit::FnKind<$hir>, |
| b: &$hir hir::FnDecl<$hir>, |
| c: &$hir hir::Body<$hir>, |
| d: Span, |
| e: hir::HirId); |
| fn check_fn_post( |
| a: rustc_hir::intravisit::FnKind<$hir>, |
| b: &$hir hir::FnDecl<$hir>, |
| c: &$hir hir::Body<$hir>, |
| d: Span, |
| e: hir::HirId |
| ); |
| fn check_trait_item(a: &$hir hir::TraitItem<$hir>); |
| fn check_trait_item_post(a: &$hir hir::TraitItem<$hir>); |
| fn check_impl_item(a: &$hir hir::ImplItem<$hir>); |
| fn check_impl_item_post(a: &$hir hir::ImplItem<$hir>); |
| fn check_struct_def(a: &$hir hir::VariantData<$hir>); |
| fn check_struct_def_post(a: &$hir hir::VariantData<$hir>); |
| fn check_struct_field(a: &$hir hir::StructField<$hir>); |
| fn check_variant(a: &$hir hir::Variant<$hir>); |
| fn check_variant_post(a: &$hir hir::Variant<$hir>); |
| fn check_lifetime(a: &$hir hir::Lifetime); |
| fn check_path(a: &$hir hir::Path<$hir>, b: hir::HirId); |
| fn check_attribute(a: &$hir ast::Attribute); |
| |
| /// Called when entering a syntax node that can have lint attributes such |
| /// as `#[allow(...)]`. Called with *all* the attributes of that node. |
| fn enter_lint_attrs(a: &$hir [ast::Attribute]); |
| |
| /// Counterpart to `enter_lint_attrs`. |
| fn exit_lint_attrs(a: &$hir [ast::Attribute]); |
| ]); |
| ) |
| } |
| |
| /// Trait for types providing lint checks. |
| /// |
| /// Each `check` method checks a single syntax node, and should not |
| /// invoke methods recursively (unlike `Visitor`). By default they |
| /// do nothing. |
| // |
| // FIXME: eliminate the duplication with `Visitor`. But this also |
| // contains a few lint-specific methods with no equivalent in `Visitor`. |
| |
| macro_rules! expand_lint_pass_methods { |
| ($context:ty, [$($(#[$attr:meta])* fn $name:ident($($param:ident: $arg:ty),*);)*]) => ( |
| $(#[inline(always)] fn $name(&mut self, _: $context, $(_: $arg),*) {})* |
| ) |
| } |
| |
| macro_rules! declare_late_lint_pass { |
| ([], [$hir:tt], [$($methods:tt)*]) => ( |
| pub trait LateLintPass<$hir>: LintPass { |
| expand_lint_pass_methods!(&LateContext<$hir>, [$($methods)*]); |
| } |
| ) |
| } |
| |
| late_lint_methods!(declare_late_lint_pass, [], ['tcx]); |
| |
| impl LateLintPass<'_> for HardwiredLints {} |
| |
| #[macro_export] |
| macro_rules! expand_combined_late_lint_pass_method { |
| ([$($passes:ident),*], $self: ident, $name: ident, $params:tt) => ({ |
| $($self.$passes.$name $params;)* |
| }) |
| } |
| |
| #[macro_export] |
| macro_rules! expand_combined_late_lint_pass_methods { |
| ($passes:tt, [$($(#[$attr:meta])* fn $name:ident($($param:ident: $arg:ty),*);)*]) => ( |
| $(fn $name(&mut self, context: &LateContext<'tcx>, $($param: $arg),*) { |
| expand_combined_late_lint_pass_method!($passes, self, $name, (context, $($param),*)); |
| })* |
| ) |
| } |
| |
| #[macro_export] |
| macro_rules! declare_combined_late_lint_pass { |
| ([$v:vis $name:ident, [$($passes:ident: $constructor:expr,)*]], [$hir:tt], $methods:tt) => ( |
| #[allow(non_snake_case)] |
| $v struct $name { |
| $($passes: $passes,)* |
| } |
| |
| impl $name { |
| $v fn new() -> Self { |
| Self { |
| $($passes: $constructor,)* |
| } |
| } |
| |
| $v fn get_lints() -> LintArray { |
| let mut lints = Vec::new(); |
| $(lints.extend_from_slice(&$passes::get_lints());)* |
| lints |
| } |
| } |
| |
| impl<'tcx> LateLintPass<'tcx> for $name { |
| expand_combined_late_lint_pass_methods!([$($passes),*], $methods); |
| } |
| |
| #[allow(rustc::lint_pass_impl_without_macro)] |
| impl LintPass for $name { |
| fn name(&self) -> &'static str { |
| panic!() |
| } |
| } |
| ) |
| } |
| |
| #[macro_export] |
| macro_rules! early_lint_methods { |
| ($macro:path, $args:tt) => ( |
| $macro!($args, [ |
| fn check_param(a: &ast::Param); |
| fn check_ident(a: Ident); |
| fn check_crate(a: &ast::Crate); |
| fn check_crate_post(a: &ast::Crate); |
| fn check_mod(a: &ast::Mod, b: Span, c: ast::NodeId); |
| fn check_mod_post(a: &ast::Mod, b: Span, c: ast::NodeId); |
| fn check_foreign_item(a: &ast::ForeignItem); |
| fn check_foreign_item_post(a: &ast::ForeignItem); |
| fn check_item(a: &ast::Item); |
| fn check_item_post(a: &ast::Item); |
| fn check_local(a: &ast::Local); |
| fn check_block(a: &ast::Block); |
| fn check_block_post(a: &ast::Block); |
| fn check_stmt(a: &ast::Stmt); |
| fn check_arm(a: &ast::Arm); |
| fn check_pat(a: &ast::Pat); |
| fn check_anon_const(a: &ast::AnonConst); |
| fn check_pat_post(a: &ast::Pat); |
| fn check_expr(a: &ast::Expr); |
| fn check_expr_post(a: &ast::Expr); |
| fn check_ty(a: &ast::Ty); |
| fn check_generic_param(a: &ast::GenericParam); |
| fn check_generics(a: &ast::Generics); |
| fn check_where_predicate(a: &ast::WherePredicate); |
| fn check_poly_trait_ref(a: &ast::PolyTraitRef, |
| b: &ast::TraitBoundModifier); |
| fn check_fn(a: rustc_ast::visit::FnKind<'_>, c: Span, d_: ast::NodeId); |
| fn check_fn_post( |
| a: rustc_ast::visit::FnKind<'_>, |
| c: Span, |
| d: ast::NodeId |
| ); |
| fn check_trait_item(a: &ast::AssocItem); |
| fn check_trait_item_post(a: &ast::AssocItem); |
| fn check_impl_item(a: &ast::AssocItem); |
| fn check_impl_item_post(a: &ast::AssocItem); |
| fn check_struct_def(a: &ast::VariantData); |
| fn check_struct_def_post(a: &ast::VariantData); |
| fn check_struct_field(a: &ast::StructField); |
| fn check_variant(a: &ast::Variant); |
| fn check_variant_post(a: &ast::Variant); |
| fn check_lifetime(a: &ast::Lifetime); |
| fn check_path(a: &ast::Path, b: ast::NodeId); |
| fn check_attribute(a: &ast::Attribute); |
| fn check_mac_def(a: &ast::MacroDef, b: ast::NodeId); |
| fn check_mac(a: &ast::MacCall); |
| |
| /// Called when entering a syntax node that can have lint attributes such |
| /// as `#[allow(...)]`. Called with *all* the attributes of that node. |
| fn enter_lint_attrs(a: &[ast::Attribute]); |
| |
| /// Counterpart to `enter_lint_attrs`. |
| fn exit_lint_attrs(a: &[ast::Attribute]); |
| ]); |
| ) |
| } |
| |
| macro_rules! expand_early_lint_pass_methods { |
| ($context:ty, [$($(#[$attr:meta])* fn $name:ident($($param:ident: $arg:ty),*);)*]) => ( |
| $(#[inline(always)] fn $name(&mut self, _: $context, $(_: $arg),*) {})* |
| ) |
| } |
| |
| macro_rules! declare_early_lint_pass { |
| ([], [$($methods:tt)*]) => ( |
| pub trait EarlyLintPass: LintPass { |
| expand_early_lint_pass_methods!(&EarlyContext<'_>, [$($methods)*]); |
| } |
| ) |
| } |
| |
| early_lint_methods!(declare_early_lint_pass, []); |
| |
| #[macro_export] |
| macro_rules! expand_combined_early_lint_pass_method { |
| ([$($passes:ident),*], $self: ident, $name: ident, $params:tt) => ({ |
| $($self.$passes.$name $params;)* |
| }) |
| } |
| |
| #[macro_export] |
| macro_rules! expand_combined_early_lint_pass_methods { |
| ($passes:tt, [$($(#[$attr:meta])* fn $name:ident($($param:ident: $arg:ty),*);)*]) => ( |
| $(fn $name(&mut self, context: &EarlyContext<'_>, $($param: $arg),*) { |
| expand_combined_early_lint_pass_method!($passes, self, $name, (context, $($param),*)); |
| })* |
| ) |
| } |
| |
| #[macro_export] |
| macro_rules! declare_combined_early_lint_pass { |
| ([$v:vis $name:ident, [$($passes:ident: $constructor:expr,)*]], $methods:tt) => ( |
| #[allow(non_snake_case)] |
| $v struct $name { |
| $($passes: $passes,)* |
| } |
| |
| impl $name { |
| $v fn new() -> Self { |
| Self { |
| $($passes: $constructor,)* |
| } |
| } |
| |
| $v fn get_lints() -> LintArray { |
| let mut lints = Vec::new(); |
| $(lints.extend_from_slice(&$passes::get_lints());)* |
| lints |
| } |
| } |
| |
| impl EarlyLintPass for $name { |
| expand_combined_early_lint_pass_methods!([$($passes),*], $methods); |
| } |
| |
| #[allow(rustc::lint_pass_impl_without_macro)] |
| impl LintPass for $name { |
| fn name(&self) -> &'static str { |
| panic!() |
| } |
| } |
| ) |
| } |
| |
| /// A lint pass boxed up as a trait object. |
| pub type EarlyLintPassObject = Box<dyn EarlyLintPass + sync::Send + sync::Sync + 'static>; |
| pub type LateLintPassObject = |
| Box<dyn for<'tcx> LateLintPass<'tcx> + sync::Send + sync::Sync + 'static>; |
