252 lines
9.6 KiB
Rust
252 lines
9.6 KiB
Rust
use crate::context::{EarlyContext, LateContext};
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use rustc_session::lint::builtin::HardwiredLints;
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use rustc_session::lint::LintPass;
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#[macro_export]
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macro_rules! late_lint_methods {
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($macro:path, $args:tt) => (
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$macro!($args, [
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fn check_body(a: &'tcx rustc_hir::Body<'tcx>);
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fn check_body_post(a: &'tcx rustc_hir::Body<'tcx>);
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fn check_crate();
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fn check_crate_post();
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fn check_mod(a: &'tcx rustc_hir::Mod<'tcx>, b: rustc_hir::HirId);
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fn check_foreign_item(a: &'tcx rustc_hir::ForeignItem<'tcx>);
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fn check_item(a: &'tcx rustc_hir::Item<'tcx>);
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fn check_item_post(a: &'tcx rustc_hir::Item<'tcx>);
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fn check_local(a: &'tcx rustc_hir::Local<'tcx>);
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fn check_block(a: &'tcx rustc_hir::Block<'tcx>);
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fn check_block_post(a: &'tcx rustc_hir::Block<'tcx>);
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fn check_stmt(a: &'tcx rustc_hir::Stmt<'tcx>);
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fn check_arm(a: &'tcx rustc_hir::Arm<'tcx>);
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fn check_pat(a: &'tcx rustc_hir::Pat<'tcx>);
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fn check_expr(a: &'tcx rustc_hir::Expr<'tcx>);
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fn check_expr_post(a: &'tcx rustc_hir::Expr<'tcx>);
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fn check_ty(a: &'tcx rustc_hir::Ty<'tcx>);
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fn check_generic_param(a: &'tcx rustc_hir::GenericParam<'tcx>);
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fn check_generics(a: &'tcx rustc_hir::Generics<'tcx>);
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fn check_poly_trait_ref(a: &'tcx rustc_hir::PolyTraitRef<'tcx>);
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fn check_fn(
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a: rustc_hir::intravisit::FnKind<'tcx>,
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b: &'tcx rustc_hir::FnDecl<'tcx>,
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c: &'tcx rustc_hir::Body<'tcx>,
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d: rustc_span::Span,
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e: rustc_span::def_id::LocalDefId);
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fn check_trait_item(a: &'tcx rustc_hir::TraitItem<'tcx>);
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fn check_impl_item(a: &'tcx rustc_hir::ImplItem<'tcx>);
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fn check_impl_item_post(a: &'tcx rustc_hir::ImplItem<'tcx>);
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fn check_struct_def(a: &'tcx rustc_hir::VariantData<'tcx>);
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fn check_field_def(a: &'tcx rustc_hir::FieldDef<'tcx>);
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fn check_variant(a: &'tcx rustc_hir::Variant<'tcx>);
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fn check_path(a: &rustc_hir::Path<'tcx>, b: rustc_hir::HirId);
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fn check_attribute(a: &'tcx rustc_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: &'tcx [rustc_ast::Attribute]);
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/// Counterpart to `enter_lint_attrs`.
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fn exit_lint_attrs(a: &'tcx [rustc_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! declare_late_lint_pass {
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([], [$($(#[$attr:meta])* fn $name:ident($($param:ident: $arg:ty),*);)*]) => (
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pub trait LateLintPass<'tcx>: LintPass {
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$(#[inline(always)] fn $name(&mut self, _: &LateContext<'tcx>, $(_: $arg),*) {})*
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}
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)
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}
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// Declare the `LateLintPass` trait, which contains empty default definitions
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// for all the `check_*` methods.
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late_lint_methods!(declare_late_lint_pass, []);
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impl LateLintPass<'_> for HardwiredLints {}
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#[macro_export]
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macro_rules! expand_combined_late_lint_pass_method {
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([$($pass:ident),*], $self: ident, $name: ident, $params:tt) => ({
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$($self.$pass.$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 $name(&mut self, context: &$crate::LateContext<'tcx>, $($param: $arg),*) {
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$crate::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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/// Combines multiple lints passes into a single lint pass, at compile time,
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/// for maximum speed. Each `check_foo` method in `$methods` within this pass
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/// simply calls `check_foo` once per `$pass`. Compare with
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/// `LateLintPassObjects`, which is similar, but combines lint passes at
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/// runtime.
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#[macro_export]
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macro_rules! declare_combined_late_lint_pass {
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([$v:vis $name:ident, [$($pass:ident: $constructor:expr,)*]], $methods:tt) => (
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#[allow(non_snake_case)]
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$v struct $name {
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$($pass: $pass,)*
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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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$($pass: $constructor,)*
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}
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}
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$v fn get_lints() -> $crate::LintVec {
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let mut lints = Vec::new();
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$(lints.extend_from_slice(&$pass::get_lints());)*
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lints
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}
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}
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impl<'tcx> $crate::LateLintPass<'tcx> for $name {
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$crate::expand_combined_late_lint_pass_methods!([$($pass),*], $methods);
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}
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#[allow(rustc::lint_pass_impl_without_macro)]
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impl $crate::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: &rustc_ast::Param);
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fn check_ident(a: rustc_span::symbol::Ident);
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fn check_crate(a: &rustc_ast::Crate);
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fn check_crate_post(a: &rustc_ast::Crate);
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fn check_item(a: &rustc_ast::Item);
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fn check_item_post(a: &rustc_ast::Item);
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fn check_local(a: &rustc_ast::Local);
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fn check_block(a: &rustc_ast::Block);
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fn check_stmt(a: &rustc_ast::Stmt);
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fn check_arm(a: &rustc_ast::Arm);
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fn check_pat(a: &rustc_ast::Pat);
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fn check_pat_post(a: &rustc_ast::Pat);
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fn check_expr(a: &rustc_ast::Expr);
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fn check_expr_post(a: &rustc_ast::Expr);
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fn check_ty(a: &rustc_ast::Ty);
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fn check_generic_arg(a: &rustc_ast::GenericArg);
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fn check_generic_param(a: &rustc_ast::GenericParam);
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fn check_generics(a: &rustc_ast::Generics);
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fn check_poly_trait_ref(a: &rustc_ast::PolyTraitRef);
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fn check_fn(
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a: rustc_ast::visit::FnKind<'_>,
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c: rustc_span::Span,
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d_: rustc_ast::NodeId);
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fn check_trait_item(a: &rustc_ast::AssocItem);
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fn check_impl_item(a: &rustc_ast::AssocItem);
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fn check_variant(a: &rustc_ast::Variant);
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fn check_attribute(a: &rustc_ast::Attribute);
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fn check_mac_def(a: &rustc_ast::MacroDef);
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fn check_mac(a: &rustc_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: &[rustc_ast::Attribute]);
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/// Counterpart to `enter_lint_attrs`.
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fn exit_lint_attrs(a: &[rustc_ast::Attribute]);
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fn enter_where_predicate(a: &rustc_ast::WherePredicate);
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fn exit_where_predicate(a: &rustc_ast::WherePredicate);
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]);
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)
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}
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macro_rules! declare_early_lint_pass {
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([], [$($(#[$attr:meta])* fn $name:ident($($param:ident: $arg:ty),*);)*]) => (
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pub trait EarlyLintPass: LintPass {
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$(#[inline(always)] fn $name(&mut self, _: &EarlyContext<'_>, $(_: $arg),*) {})*
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}
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)
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}
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// Declare the `EarlyLintPass` trait, which contains empty default definitions
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// for all the `check_*` methods.
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early_lint_methods!(declare_early_lint_pass, []);
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#[macro_export]
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macro_rules! expand_combined_early_lint_pass_method {
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([$($pass:ident),*], $self: ident, $name: ident, $params:tt) => ({
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$($self.$pass.$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 $name(&mut self, context: &$crate::EarlyContext<'_>, $($param: $arg),*) {
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$crate::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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/// Combines multiple lints passes into a single lint pass, at compile time,
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/// for maximum speed. Each `check_foo` method in `$methods` within this pass
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/// simply calls `check_foo` once per `$pass`. Compare with
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/// `EarlyLintPassObjects`, which is similar, but combines lint passes at
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/// runtime.
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#[macro_export]
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macro_rules! declare_combined_early_lint_pass {
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([$v:vis $name:ident, [$($pass:ident: $constructor:expr,)*]], $methods:tt) => (
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#[allow(non_snake_case)]
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$v struct $name {
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$($pass: $pass,)*
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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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$($pass: $constructor,)*
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}
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}
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$v fn get_lints() -> $crate::LintVec {
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let mut lints = Vec::new();
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$(lints.extend_from_slice(&$pass::get_lints());)*
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lints
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}
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}
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impl $crate::EarlyLintPass for $name {
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$crate::expand_combined_early_lint_pass_methods!([$($pass),*], $methods);
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}
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#[allow(rustc::lint_pass_impl_without_macro)]
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impl $crate::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 + 'static>;
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pub type LateLintPassObject<'tcx> = Box<dyn LateLintPass<'tcx> + 'tcx>;
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