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