Move early lint machanism in librustc_lint.
This commit is contained in:
Camille GILLOT
parent
9e6fb538f9
commit
3a350e1a39
5 changed files with 399 additions and 370 deletions
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@ -23,7 +23,7 @@ use crate::hir::intravisit::Visitor;
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use crate::hir::map::{definitions::DisambiguatedDefPathData, DefPathData};
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use crate::hir::map::{definitions::DisambiguatedDefPathData, DefPathData};
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use crate::lint::builtin::BuiltinLintDiagnostics;
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use crate::lint::builtin::BuiltinLintDiagnostics;
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use crate::lint::levels::{LintLevelSets, LintLevelsBuilder};
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use crate::lint::levels::{LintLevelSets, LintLevelsBuilder};
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use crate::lint::{EarlyLintPass, EarlyLintPassObject, LateLintPass, LateLintPassObject};
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use crate::lint::{EarlyLintPassObject, LateLintPass, LateLintPassObject};
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use crate::lint::{FutureIncompatibleInfo, Level, Lint, LintBuffer, LintId, LintPass};
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use crate::lint::{FutureIncompatibleInfo, Level, Lint, LintBuffer, LintId, LintPass};
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use crate::middle::privacy::AccessLevels;
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use crate::middle::privacy::AccessLevels;
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use crate::session::Session;
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use crate::session::Session;
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@ -38,7 +38,6 @@ use rustc_span::{symbol::Symbol, MultiSpan, Span};
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use std::slice;
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use std::slice;
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use syntax::ast;
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use syntax::ast;
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use syntax::util::lev_distance::find_best_match_for_name;
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use syntax::util::lev_distance::find_best_match_for_name;
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use syntax::visit as ast_visit;
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use rustc_error_codes::*;
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use rustc_error_codes::*;
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@ -56,8 +55,8 @@ pub struct LintStore {
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/// interior mutability, we don't enforce this (and lints should, in theory,
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/// interior mutability, we don't enforce this (and lints should, in theory,
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/// be compatible with being constructed more than once, though not
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/// be compatible with being constructed more than once, though not
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/// necessarily in a sane manner. This is safe though.)
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/// necessarily in a sane manner. This is safe though.)
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pre_expansion_passes: Vec<Box<dyn Fn() -> EarlyLintPassObject + sync::Send + sync::Sync>>,
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pub pre_expansion_passes: Vec<Box<dyn Fn() -> EarlyLintPassObject + sync::Send + sync::Sync>>,
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early_passes: Vec<Box<dyn Fn() -> EarlyLintPassObject + sync::Send + sync::Sync>>,
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pub early_passes: Vec<Box<dyn Fn() -> EarlyLintPassObject + sync::Send + sync::Sync>>,
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late_passes: Vec<Box<dyn Fn() -> LateLintPassObject + sync::Send + sync::Sync>>,
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late_passes: Vec<Box<dyn Fn() -> LateLintPassObject + sync::Send + sync::Sync>>,
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/// This is unique in that we construct them per-module, so not once.
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/// This is unique in that we construct them per-module, so not once.
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late_module_passes: Vec<Box<dyn Fn() -> LateLintPassObject + sync::Send + sync::Sync>>,
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late_module_passes: Vec<Box<dyn Fn() -> LateLintPassObject + sync::Send + sync::Sync>>,
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@ -455,7 +454,7 @@ pub struct LateContext<'a, 'tcx> {
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pub generics: Option<&'tcx hir::Generics<'tcx>>,
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pub generics: Option<&'tcx hir::Generics<'tcx>>,
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/// We are only looking at one module
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/// We are only looking at one module
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only_module: bool,
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pub only_module: bool,
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}
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}
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pub struct LateContextAndPass<'a, 'tcx, T: LateLintPass<'a, 'tcx>> {
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pub struct LateContextAndPass<'a, 'tcx, T: LateLintPass<'a, 'tcx>> {
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@ -472,17 +471,12 @@ pub struct EarlyContext<'a> {
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/// The crate being checked.
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/// The crate being checked.
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pub krate: &'a ast::Crate,
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pub krate: &'a ast::Crate,
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builder: LintLevelsBuilder<'a>,
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pub builder: LintLevelsBuilder<'a>,
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/// The store of registered lints and the lint levels.
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/// The store of registered lints and the lint levels.
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lint_store: &'a LintStore,
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pub lint_store: &'a LintStore,
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buffered: LintBuffer,
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pub buffered: LintBuffer,
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}
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pub struct EarlyContextAndPass<'a, T: EarlyLintPass> {
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context: EarlyContext<'a>,
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pass: T,
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}
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}
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pub trait LintPassObject: Sized {}
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pub trait LintPassObject: Sized {}
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@ -567,7 +561,7 @@ pub trait LintContext: Sized {
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}
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}
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impl<'a> EarlyContext<'a> {
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impl<'a> EarlyContext<'a> {
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fn new(
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pub fn new(
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sess: &'a Session,
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sess: &'a Session,
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lint_store: &'a LintStore,
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lint_store: &'a LintStore,
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krate: &'a ast::Crate,
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krate: &'a ast::Crate,
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@ -588,48 +582,6 @@ macro_rules! lint_callback { ($cx:expr, $f:ident, $($args:expr),*) => ({
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$cx.pass.$f(&$cx.context, $($args),*);
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$cx.pass.$f(&$cx.context, $($args),*);
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}) }
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}) }
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macro_rules! run_early_pass { ($cx:expr, $f:ident, $($args:expr),*) => ({
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$cx.pass.$f(&$cx.context, $($args),*);
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}) }
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impl<'a, T: EarlyLintPass> EarlyContextAndPass<'a, T> {
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fn check_id(&mut self, id: ast::NodeId) {
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for early_lint in self.context.buffered.take(id) {
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self.context.lookup_and_emit_with_diagnostics(
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early_lint.lint_id.lint,
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Some(early_lint.span.clone()),
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&early_lint.msg,
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early_lint.diagnostic,
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);
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}
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}
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/// Merge the lints specified by any lint attributes into the
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/// current lint context, call the provided function, then reset the
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/// lints in effect to their previous state.
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fn with_lint_attrs<F>(&mut self, id: ast::NodeId, attrs: &'a [ast::Attribute], f: F)
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where
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F: FnOnce(&mut Self),
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{
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let push = self.context.builder.push(attrs, &self.context.lint_store);
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self.check_id(id);
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self.enter_attrs(attrs);
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f(self);
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self.exit_attrs(attrs);
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self.context.builder.pop(push);
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}
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fn enter_attrs(&mut self, attrs: &'a [ast::Attribute]) {
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debug!("early context: enter_attrs({:?})", attrs);
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run_early_pass!(self, enter_lint_attrs, attrs);
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}
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fn exit_attrs(&mut self, attrs: &'a [ast::Attribute]) {
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debug!("early context: exit_attrs({:?})", attrs);
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run_early_pass!(self, exit_lint_attrs, attrs);
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}
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}
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impl LintContext for LateContext<'_, '_> {
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impl LintContext for LateContext<'_, '_> {
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type PassObject = LateLintPassObject;
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type PassObject = LateLintPassObject;
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@ -1103,195 +1055,6 @@ impl<'a, 'tcx, T: LateLintPass<'a, 'tcx>> hir_visit::Visitor<'tcx>
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}
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}
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}
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}
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impl<'a, T: EarlyLintPass> ast_visit::Visitor<'a> for EarlyContextAndPass<'a, T> {
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fn visit_param(&mut self, param: &'a ast::Param) {
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self.with_lint_attrs(param.id, ¶m.attrs, |cx| {
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run_early_pass!(cx, check_param, param);
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ast_visit::walk_param(cx, param);
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});
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}
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fn visit_item(&mut self, it: &'a ast::Item) {
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self.with_lint_attrs(it.id, &it.attrs, |cx| {
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run_early_pass!(cx, check_item, it);
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ast_visit::walk_item(cx, it);
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run_early_pass!(cx, check_item_post, it);
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})
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}
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fn visit_foreign_item(&mut self, it: &'a ast::ForeignItem) {
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self.with_lint_attrs(it.id, &it.attrs, |cx| {
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run_early_pass!(cx, check_foreign_item, it);
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ast_visit::walk_foreign_item(cx, it);
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run_early_pass!(cx, check_foreign_item_post, it);
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})
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}
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fn visit_pat(&mut self, p: &'a ast::Pat) {
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run_early_pass!(self, check_pat, p);
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self.check_id(p.id);
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ast_visit::walk_pat(self, p);
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run_early_pass!(self, check_pat_post, p);
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}
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fn visit_expr(&mut self, e: &'a ast::Expr) {
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self.with_lint_attrs(e.id, &e.attrs, |cx| {
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run_early_pass!(cx, check_expr, e);
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ast_visit::walk_expr(cx, e);
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})
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}
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fn visit_stmt(&mut self, s: &'a ast::Stmt) {
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run_early_pass!(self, check_stmt, s);
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self.check_id(s.id);
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ast_visit::walk_stmt(self, s);
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}
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fn visit_fn(
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&mut self,
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fk: ast_visit::FnKind<'a>,
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decl: &'a ast::FnDecl,
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span: Span,
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id: ast::NodeId,
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) {
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run_early_pass!(self, check_fn, fk, decl, span, id);
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self.check_id(id);
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ast_visit::walk_fn(self, fk, decl, span);
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run_early_pass!(self, check_fn_post, fk, decl, span, id);
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}
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fn visit_variant_data(&mut self, s: &'a ast::VariantData) {
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run_early_pass!(self, check_struct_def, s);
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if let Some(ctor_hir_id) = s.ctor_id() {
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self.check_id(ctor_hir_id);
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}
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ast_visit::walk_struct_def(self, s);
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run_early_pass!(self, check_struct_def_post, s);
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}
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fn visit_struct_field(&mut self, s: &'a ast::StructField) {
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self.with_lint_attrs(s.id, &s.attrs, |cx| {
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run_early_pass!(cx, check_struct_field, s);
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ast_visit::walk_struct_field(cx, s);
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})
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}
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fn visit_variant(&mut self, v: &'a ast::Variant) {
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self.with_lint_attrs(v.id, &v.attrs, |cx| {
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run_early_pass!(cx, check_variant, v);
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ast_visit::walk_variant(cx, v);
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run_early_pass!(cx, check_variant_post, v);
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})
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}
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fn visit_ty(&mut self, t: &'a ast::Ty) {
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run_early_pass!(self, check_ty, t);
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self.check_id(t.id);
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ast_visit::walk_ty(self, t);
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}
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fn visit_ident(&mut self, ident: ast::Ident) {
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run_early_pass!(self, check_ident, ident);
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}
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fn visit_mod(&mut self, m: &'a ast::Mod, s: Span, _a: &[ast::Attribute], n: ast::NodeId) {
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run_early_pass!(self, check_mod, m, s, n);
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self.check_id(n);
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ast_visit::walk_mod(self, m);
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run_early_pass!(self, check_mod_post, m, s, n);
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}
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fn visit_local(&mut self, l: &'a ast::Local) {
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self.with_lint_attrs(l.id, &l.attrs, |cx| {
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run_early_pass!(cx, check_local, l);
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ast_visit::walk_local(cx, l);
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})
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}
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fn visit_block(&mut self, b: &'a ast::Block) {
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run_early_pass!(self, check_block, b);
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self.check_id(b.id);
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ast_visit::walk_block(self, b);
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run_early_pass!(self, check_block_post, b);
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}
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fn visit_arm(&mut self, a: &'a ast::Arm) {
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run_early_pass!(self, check_arm, a);
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ast_visit::walk_arm(self, a);
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}
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fn visit_expr_post(&mut self, e: &'a ast::Expr) {
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run_early_pass!(self, check_expr_post, e);
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}
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fn visit_generic_param(&mut self, param: &'a ast::GenericParam) {
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run_early_pass!(self, check_generic_param, param);
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ast_visit::walk_generic_param(self, param);
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}
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fn visit_generics(&mut self, g: &'a ast::Generics) {
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run_early_pass!(self, check_generics, g);
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ast_visit::walk_generics(self, g);
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}
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fn visit_where_predicate(&mut self, p: &'a ast::WherePredicate) {
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run_early_pass!(self, check_where_predicate, p);
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ast_visit::walk_where_predicate(self, p);
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}
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fn visit_poly_trait_ref(&mut self, t: &'a ast::PolyTraitRef, m: &'a ast::TraitBoundModifier) {
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run_early_pass!(self, check_poly_trait_ref, t, m);
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ast_visit::walk_poly_trait_ref(self, t, m);
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}
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fn visit_trait_item(&mut self, trait_item: &'a ast::AssocItem) {
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self.with_lint_attrs(trait_item.id, &trait_item.attrs, |cx| {
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run_early_pass!(cx, check_trait_item, trait_item);
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ast_visit::walk_trait_item(cx, trait_item);
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run_early_pass!(cx, check_trait_item_post, trait_item);
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});
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}
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fn visit_impl_item(&mut self, impl_item: &'a ast::AssocItem) {
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self.with_lint_attrs(impl_item.id, &impl_item.attrs, |cx| {
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run_early_pass!(cx, check_impl_item, impl_item);
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ast_visit::walk_impl_item(cx, impl_item);
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run_early_pass!(cx, check_impl_item_post, impl_item);
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});
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}
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fn visit_lifetime(&mut self, lt: &'a ast::Lifetime) {
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run_early_pass!(self, check_lifetime, lt);
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self.check_id(lt.id);
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}
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fn visit_path(&mut self, p: &'a ast::Path, id: ast::NodeId) {
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run_early_pass!(self, check_path, p, id);
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self.check_id(id);
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ast_visit::walk_path(self, p);
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}
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fn visit_attribute(&mut self, attr: &'a ast::Attribute) {
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run_early_pass!(self, check_attribute, attr);
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}
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fn visit_mac_def(&mut self, mac: &'a ast::MacroDef, id: ast::NodeId) {
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run_early_pass!(self, check_mac_def, mac, id);
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self.check_id(id);
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}
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fn visit_mac(&mut self, mac: &'a ast::Mac) {
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// FIXME(#54110): So, this setup isn't really right. I think
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// that (a) the libsyntax visitor ought to be doing this as
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// part of `walk_mac`, and (b) we should be calling
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// `visit_path`, *but* that would require a `NodeId`, and I
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// want to get #53686 fixed quickly. -nmatsakis
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ast_visit::walk_path(self, &mac.path);
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run_early_pass!(self, check_mac, mac);
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}
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}
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struct LateLintPassObjects<'a> {
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struct LateLintPassObjects<'a> {
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lints: &'a mut [LateLintPassObject],
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lints: &'a mut [LateLintPassObject],
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}
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}
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@ -1451,122 +1214,3 @@ pub fn check_crate<'tcx, T: for<'a> LateLintPass<'a, 'tcx>>(
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},
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},
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);
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);
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}
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}
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struct EarlyLintPassObjects<'a> {
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lints: &'a mut [EarlyLintPassObject],
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}
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#[allow(rustc::lint_pass_impl_without_macro)]
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impl LintPass for EarlyLintPassObjects<'_> {
|
|
||||||
fn name(&self) -> &'static str {
|
|
||||||
panic!()
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
macro_rules! expand_early_lint_pass_impl_methods {
|
|
||||||
([$($(#[$attr:meta])* fn $name:ident($($param:ident: $arg:ty),*);)*]) => (
|
|
||||||
$(fn $name(&mut self, context: &EarlyContext<'_>, $($param: $arg),*) {
|
|
||||||
for obj in self.lints.iter_mut() {
|
|
||||||
obj.$name(context, $($param),*);
|
|
||||||
}
|
|
||||||
})*
|
|
||||||
)
|
|
||||||
}
|
|
||||||
|
|
||||||
macro_rules! early_lint_pass_impl {
|
|
||||||
([], [$($methods:tt)*]) => (
|
|
||||||
impl EarlyLintPass for EarlyLintPassObjects<'_> {
|
|
||||||
expand_early_lint_pass_impl_methods!([$($methods)*]);
|
|
||||||
}
|
|
||||||
)
|
|
||||||
}
|
|
||||||
|
|
||||||
early_lint_methods!(early_lint_pass_impl, []);
|
|
||||||
|
|
||||||
fn early_lint_crate<T: EarlyLintPass>(
|
|
||||||
sess: &Session,
|
|
||||||
lint_store: &LintStore,
|
|
||||||
krate: &ast::Crate,
|
|
||||||
pass: T,
|
|
||||||
buffered: LintBuffer,
|
|
||||||
warn_about_weird_lints: bool,
|
|
||||||
) -> LintBuffer {
|
|
||||||
let mut cx = EarlyContextAndPass {
|
|
||||||
context: EarlyContext::new(sess, lint_store, krate, buffered, warn_about_weird_lints),
|
|
||||||
pass,
|
|
||||||
};
|
|
||||||
|
|
||||||
// Visit the whole crate.
|
|
||||||
cx.with_lint_attrs(ast::CRATE_NODE_ID, &krate.attrs, |cx| {
|
|
||||||
// since the root module isn't visited as an item (because it isn't an
|
|
||||||
// item), warn for it here.
|
|
||||||
run_early_pass!(cx, check_crate, krate);
|
|
||||||
|
|
||||||
ast_visit::walk_crate(cx, krate);
|
|
||||||
|
|
||||||
run_early_pass!(cx, check_crate_post, krate);
|
|
||||||
});
|
|
||||||
cx.context.buffered
|
|
||||||
}
|
|
||||||
|
|
||||||
pub fn check_ast_crate<T: EarlyLintPass>(
|
|
||||||
sess: &Session,
|
|
||||||
lint_store: &LintStore,
|
|
||||||
krate: &ast::Crate,
|
|
||||||
pre_expansion: bool,
|
|
||||||
lint_buffer: Option<LintBuffer>,
|
|
||||||
builtin_lints: T,
|
|
||||||
) {
|
|
||||||
let mut passes: Vec<_> = if pre_expansion {
|
|
||||||
lint_store.pre_expansion_passes.iter().map(|p| (p)()).collect()
|
|
||||||
} else {
|
|
||||||
lint_store.early_passes.iter().map(|p| (p)()).collect()
|
|
||||||
};
|
|
||||||
let mut buffered = lint_buffer.unwrap_or_default();
|
|
||||||
|
|
||||||
if !sess.opts.debugging_opts.no_interleave_lints {
|
|
||||||
buffered =
|
|
||||||
early_lint_crate(sess, lint_store, krate, builtin_lints, buffered, pre_expansion);
|
|
||||||
|
|
||||||
if !passes.is_empty() {
|
|
||||||
buffered = early_lint_crate(
|
|
||||||
sess,
|
|
||||||
lint_store,
|
|
||||||
krate,
|
|
||||||
EarlyLintPassObjects { lints: &mut passes[..] },
|
|
||||||
buffered,
|
|
||||||
pre_expansion,
|
|
||||||
);
|
|
||||||
}
|
|
||||||
} else {
|
|
||||||
for pass in &mut passes {
|
|
||||||
buffered = time(sess, &format!("running lint: {}", pass.name()), || {
|
|
||||||
early_lint_crate(
|
|
||||||
sess,
|
|
||||||
lint_store,
|
|
||||||
krate,
|
|
||||||
EarlyLintPassObjects { lints: slice::from_mut(pass) },
|
|
||||||
buffered,
|
|
||||||
pre_expansion,
|
|
||||||
)
|
|
||||||
});
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
// All of the buffered lints should have been emitted at this point.
|
|
||||||
// If not, that means that we somehow buffered a lint for a node id
|
|
||||||
// that was not lint-checked (perhaps it doesn't exist?). This is a bug.
|
|
||||||
//
|
|
||||||
// Rustdoc runs everybody-loops before the early lints and removes
|
|
||||||
// function bodies, so it's totally possible for linted
|
|
||||||
// node ids to not exist (e.g., macros defined within functions for the
|
|
||||||
// unused_macro lint) anymore. So we only run this check
|
|
||||||
// when we're not in rustdoc mode. (see issue #47639)
|
|
||||||
if !sess.opts.actually_rustdoc {
|
|
||||||
for (_id, lints) in buffered.map {
|
|
||||||
for early_lint in lints {
|
|
||||||
sess.delay_span_bug(early_lint.span, "failed to process buffered lint here");
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
|
||||||
|
|
@ -39,8 +39,8 @@ use syntax::source_map::{DesugaringKind, ExpnKind, MultiSpan};
|
||||||
use syntax::symbol::Symbol;
|
use syntax::symbol::Symbol;
|
||||||
|
|
||||||
pub use crate::lint::context::{
|
pub use crate::lint::context::{
|
||||||
check_ast_crate, check_crate, late_lint_mod, BufferedEarlyLint, CheckLintNameResult,
|
check_crate, late_lint_mod, BufferedEarlyLint, CheckLintNameResult, EarlyContext, LateContext,
|
||||||
EarlyContext, LateContext, LintContext, LintStore,
|
LintContext, LintStore,
|
||||||
};
|
};
|
||||||
|
|
||||||
pub use rustc_session::lint::{FutureIncompatibleInfo, Level, Lint, LintId};
|
pub use rustc_session::lint::{FutureIncompatibleInfo, Level, Lint, LintId};
|
||||||
|
|
@ -380,7 +380,7 @@ pub use self::levels::{LintLevelMap, LintLevelSets};
|
||||||
|
|
||||||
#[derive(Default)]
|
#[derive(Default)]
|
||||||
pub struct LintBuffer {
|
pub struct LintBuffer {
|
||||||
map: NodeMap<Vec<BufferedEarlyLint>>,
|
pub map: NodeMap<Vec<BufferedEarlyLint>>,
|
||||||
}
|
}
|
||||||
|
|
||||||
impl LintBuffer {
|
impl LintBuffer {
|
||||||
|
|
@ -405,7 +405,7 @@ impl LintBuffer {
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
fn take(&mut self, id: ast::NodeId) -> Vec<BufferedEarlyLint> {
|
pub fn take(&mut self, id: ast::NodeId) -> Vec<BufferedEarlyLint> {
|
||||||
self.map.remove(&id).unwrap_or_default()
|
self.map.remove(&id).unwrap_or_default()
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
|
||||||
|
|
@ -231,7 +231,7 @@ fn configure_and_expand_inner<'a>(
|
||||||
metadata_loader: &'a MetadataLoaderDyn,
|
metadata_loader: &'a MetadataLoaderDyn,
|
||||||
) -> Result<(ast::Crate, Resolver<'a>)> {
|
) -> Result<(ast::Crate, Resolver<'a>)> {
|
||||||
time(sess, "pre-AST-expansion lint checks", || {
|
time(sess, "pre-AST-expansion lint checks", || {
|
||||||
lint::check_ast_crate(
|
rustc_lint::check_ast_crate(
|
||||||
sess,
|
sess,
|
||||||
lint_store,
|
lint_store,
|
||||||
&krate,
|
&krate,
|
||||||
|
|
@ -458,7 +458,7 @@ pub fn lower_to_hir<'res, 'tcx>(
|
||||||
});
|
});
|
||||||
|
|
||||||
time(sess, "early lint checks", || {
|
time(sess, "early lint checks", || {
|
||||||
lint::check_ast_crate(
|
rustc_lint::check_ast_crate(
|
||||||
sess,
|
sess,
|
||||||
lint_store,
|
lint_store,
|
||||||
&krate,
|
&krate,
|
||||||
|
|
|
||||||
383
src/librustc_lint/early.rs
Normal file
383
src/librustc_lint/early.rs
Normal file
|
|
@ -0,0 +1,383 @@
|
||||||
|
//! Implementation of lint checking.
|
||||||
|
//!
|
||||||
|
//! The lint checking is mostly consolidated into one pass which runs
|
||||||
|
//! after all other analyses. Throughout compilation, lint warnings
|
||||||
|
//! can be added via the `add_lint` method on the Session structure. This
|
||||||
|
//! requires a span and an ID of the node that the lint is being added to. The
|
||||||
|
//! lint isn't actually emitted at that time because it is unknown what the
|
||||||
|
//! actual lint level at that location is.
|
||||||
|
//!
|
||||||
|
//! To actually emit lint warnings/errors, a separate pass is used.
|
||||||
|
//! A context keeps track of the current state of all lint levels.
|
||||||
|
//! Upon entering a node of the ast which can modify the lint settings, the
|
||||||
|
//! previous lint state is pushed onto a stack and the ast is then recursed
|
||||||
|
//! upon. As the ast is traversed, this keeps track of the current lint level
|
||||||
|
//! for all lint attributes.
|
||||||
|
|
||||||
|
use rustc::lint::{EarlyContext, LintStore};
|
||||||
|
use rustc::lint::{EarlyLintPass, EarlyLintPassObject};
|
||||||
|
use rustc::lint::{LintBuffer, LintContext, LintPass};
|
||||||
|
use rustc::session::Session;
|
||||||
|
use rustc::util::common::time;
|
||||||
|
|
||||||
|
use rustc_span::Span;
|
||||||
|
use std::slice;
|
||||||
|
use syntax::ast;
|
||||||
|
use syntax::visit as ast_visit;
|
||||||
|
|
||||||
|
use log::debug;
|
||||||
|
|
||||||
|
macro_rules! run_early_pass { ($cx:expr, $f:ident, $($args:expr),*) => ({
|
||||||
|
$cx.pass.$f(&$cx.context, $($args),*);
|
||||||
|
}) }
|
||||||
|
|
||||||
|
struct EarlyContextAndPass<'a, T: EarlyLintPass> {
|
||||||
|
context: EarlyContext<'a>,
|
||||||
|
pass: T,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl<'a, T: EarlyLintPass> EarlyContextAndPass<'a, T> {
|
||||||
|
fn check_id(&mut self, id: ast::NodeId) {
|
||||||
|
for early_lint in self.context.buffered.take(id) {
|
||||||
|
self.context.lookup_and_emit_with_diagnostics(
|
||||||
|
early_lint.lint_id.lint,
|
||||||
|
Some(early_lint.span.clone()),
|
||||||
|
&early_lint.msg,
|
||||||
|
early_lint.diagnostic,
|
||||||
|
);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Merge the lints specified by any lint attributes into the
|
||||||
|
/// current lint context, call the provided function, then reset the
|
||||||
|
/// lints in effect to their previous state.
|
||||||
|
fn with_lint_attrs<F>(&mut self, id: ast::NodeId, attrs: &'a [ast::Attribute], f: F)
|
||||||
|
where
|
||||||
|
F: FnOnce(&mut Self),
|
||||||
|
{
|
||||||
|
let push = self.context.builder.push(attrs, &self.context.lint_store);
|
||||||
|
self.check_id(id);
|
||||||
|
self.enter_attrs(attrs);
|
||||||
|
f(self);
|
||||||
|
self.exit_attrs(attrs);
|
||||||
|
self.context.builder.pop(push);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn enter_attrs(&mut self, attrs: &'a [ast::Attribute]) {
|
||||||
|
debug!("early context: enter_attrs({:?})", attrs);
|
||||||
|
run_early_pass!(self, enter_lint_attrs, attrs);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn exit_attrs(&mut self, attrs: &'a [ast::Attribute]) {
|
||||||
|
debug!("early context: exit_attrs({:?})", attrs);
|
||||||
|
run_early_pass!(self, exit_lint_attrs, attrs);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl<'a, T: EarlyLintPass> ast_visit::Visitor<'a> for EarlyContextAndPass<'a, T> {
|
||||||
|
fn visit_param(&mut self, param: &'a ast::Param) {
|
||||||
|
self.with_lint_attrs(param.id, ¶m.attrs, |cx| {
|
||||||
|
run_early_pass!(cx, check_param, param);
|
||||||
|
ast_visit::walk_param(cx, param);
|
||||||
|
});
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_item(&mut self, it: &'a ast::Item) {
|
||||||
|
self.with_lint_attrs(it.id, &it.attrs, |cx| {
|
||||||
|
run_early_pass!(cx, check_item, it);
|
||||||
|
ast_visit::walk_item(cx, it);
|
||||||
|
run_early_pass!(cx, check_item_post, it);
|
||||||
|
})
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_foreign_item(&mut self, it: &'a ast::ForeignItem) {
|
||||||
|
self.with_lint_attrs(it.id, &it.attrs, |cx| {
|
||||||
|
run_early_pass!(cx, check_foreign_item, it);
|
||||||
|
ast_visit::walk_foreign_item(cx, it);
|
||||||
|
run_early_pass!(cx, check_foreign_item_post, it);
|
||||||
|
})
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_pat(&mut self, p: &'a ast::Pat) {
|
||||||
|
run_early_pass!(self, check_pat, p);
|
||||||
|
self.check_id(p.id);
|
||||||
|
ast_visit::walk_pat(self, p);
|
||||||
|
run_early_pass!(self, check_pat_post, p);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_expr(&mut self, e: &'a ast::Expr) {
|
||||||
|
self.with_lint_attrs(e.id, &e.attrs, |cx| {
|
||||||
|
run_early_pass!(cx, check_expr, e);
|
||||||
|
ast_visit::walk_expr(cx, e);
|
||||||
|
})
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_stmt(&mut self, s: &'a ast::Stmt) {
|
||||||
|
run_early_pass!(self, check_stmt, s);
|
||||||
|
self.check_id(s.id);
|
||||||
|
ast_visit::walk_stmt(self, s);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_fn(
|
||||||
|
&mut self,
|
||||||
|
fk: ast_visit::FnKind<'a>,
|
||||||
|
decl: &'a ast::FnDecl,
|
||||||
|
span: Span,
|
||||||
|
id: ast::NodeId,
|
||||||
|
) {
|
||||||
|
run_early_pass!(self, check_fn, fk, decl, span, id);
|
||||||
|
self.check_id(id);
|
||||||
|
ast_visit::walk_fn(self, fk, decl, span);
|
||||||
|
run_early_pass!(self, check_fn_post, fk, decl, span, id);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_variant_data(&mut self, s: &'a ast::VariantData) {
|
||||||
|
run_early_pass!(self, check_struct_def, s);
|
||||||
|
if let Some(ctor_hir_id) = s.ctor_id() {
|
||||||
|
self.check_id(ctor_hir_id);
|
||||||
|
}
|
||||||
|
ast_visit::walk_struct_def(self, s);
|
||||||
|
run_early_pass!(self, check_struct_def_post, s);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_struct_field(&mut self, s: &'a ast::StructField) {
|
||||||
|
self.with_lint_attrs(s.id, &s.attrs, |cx| {
|
||||||
|
run_early_pass!(cx, check_struct_field, s);
|
||||||
|
ast_visit::walk_struct_field(cx, s);
|
||||||
|
})
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_variant(&mut self, v: &'a ast::Variant) {
|
||||||
|
self.with_lint_attrs(v.id, &v.attrs, |cx| {
|
||||||
|
run_early_pass!(cx, check_variant, v);
|
||||||
|
ast_visit::walk_variant(cx, v);
|
||||||
|
run_early_pass!(cx, check_variant_post, v);
|
||||||
|
})
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_ty(&mut self, t: &'a ast::Ty) {
|
||||||
|
run_early_pass!(self, check_ty, t);
|
||||||
|
self.check_id(t.id);
|
||||||
|
ast_visit::walk_ty(self, t);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_ident(&mut self, ident: ast::Ident) {
|
||||||
|
run_early_pass!(self, check_ident, ident);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_mod(&mut self, m: &'a ast::Mod, s: Span, _a: &[ast::Attribute], n: ast::NodeId) {
|
||||||
|
run_early_pass!(self, check_mod, m, s, n);
|
||||||
|
self.check_id(n);
|
||||||
|
ast_visit::walk_mod(self, m);
|
||||||
|
run_early_pass!(self, check_mod_post, m, s, n);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_local(&mut self, l: &'a ast::Local) {
|
||||||
|
self.with_lint_attrs(l.id, &l.attrs, |cx| {
|
||||||
|
run_early_pass!(cx, check_local, l);
|
||||||
|
ast_visit::walk_local(cx, l);
|
||||||
|
})
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_block(&mut self, b: &'a ast::Block) {
|
||||||
|
run_early_pass!(self, check_block, b);
|
||||||
|
self.check_id(b.id);
|
||||||
|
ast_visit::walk_block(self, b);
|
||||||
|
run_early_pass!(self, check_block_post, b);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_arm(&mut self, a: &'a ast::Arm) {
|
||||||
|
run_early_pass!(self, check_arm, a);
|
||||||
|
ast_visit::walk_arm(self, a);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_expr_post(&mut self, e: &'a ast::Expr) {
|
||||||
|
run_early_pass!(self, check_expr_post, e);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_generic_param(&mut self, param: &'a ast::GenericParam) {
|
||||||
|
run_early_pass!(self, check_generic_param, param);
|
||||||
|
ast_visit::walk_generic_param(self, param);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_generics(&mut self, g: &'a ast::Generics) {
|
||||||
|
run_early_pass!(self, check_generics, g);
|
||||||
|
ast_visit::walk_generics(self, g);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_where_predicate(&mut self, p: &'a ast::WherePredicate) {
|
||||||
|
run_early_pass!(self, check_where_predicate, p);
|
||||||
|
ast_visit::walk_where_predicate(self, p);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_poly_trait_ref(&mut self, t: &'a ast::PolyTraitRef, m: &'a ast::TraitBoundModifier) {
|
||||||
|
run_early_pass!(self, check_poly_trait_ref, t, m);
|
||||||
|
ast_visit::walk_poly_trait_ref(self, t, m);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_trait_item(&mut self, trait_item: &'a ast::AssocItem) {
|
||||||
|
self.with_lint_attrs(trait_item.id, &trait_item.attrs, |cx| {
|
||||||
|
run_early_pass!(cx, check_trait_item, trait_item);
|
||||||
|
ast_visit::walk_trait_item(cx, trait_item);
|
||||||
|
run_early_pass!(cx, check_trait_item_post, trait_item);
|
||||||
|
});
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_impl_item(&mut self, impl_item: &'a ast::AssocItem) {
|
||||||
|
self.with_lint_attrs(impl_item.id, &impl_item.attrs, |cx| {
|
||||||
|
run_early_pass!(cx, check_impl_item, impl_item);
|
||||||
|
ast_visit::walk_impl_item(cx, impl_item);
|
||||||
|
run_early_pass!(cx, check_impl_item_post, impl_item);
|
||||||
|
});
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_lifetime(&mut self, lt: &'a ast::Lifetime) {
|
||||||
|
run_early_pass!(self, check_lifetime, lt);
|
||||||
|
self.check_id(lt.id);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_path(&mut self, p: &'a ast::Path, id: ast::NodeId) {
|
||||||
|
run_early_pass!(self, check_path, p, id);
|
||||||
|
self.check_id(id);
|
||||||
|
ast_visit::walk_path(self, p);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_attribute(&mut self, attr: &'a ast::Attribute) {
|
||||||
|
run_early_pass!(self, check_attribute, attr);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_mac_def(&mut self, mac: &'a ast::MacroDef, id: ast::NodeId) {
|
||||||
|
run_early_pass!(self, check_mac_def, mac, id);
|
||||||
|
self.check_id(id);
|
||||||
|
}
|
||||||
|
|
||||||
|
fn visit_mac(&mut self, mac: &'a ast::Mac) {
|
||||||
|
// FIXME(#54110): So, this setup isn't really right. I think
|
||||||
|
// that (a) the libsyntax visitor ought to be doing this as
|
||||||
|
// part of `walk_mac`, and (b) we should be calling
|
||||||
|
// `visit_path`, *but* that would require a `NodeId`, and I
|
||||||
|
// want to get #53686 fixed quickly. -nmatsakis
|
||||||
|
ast_visit::walk_path(self, &mac.path);
|
||||||
|
|
||||||
|
run_early_pass!(self, check_mac, mac);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
struct EarlyLintPassObjects<'a> {
|
||||||
|
lints: &'a mut [EarlyLintPassObject],
|
||||||
|
}
|
||||||
|
|
||||||
|
#[allow(rustc::lint_pass_impl_without_macro)]
|
||||||
|
impl LintPass for EarlyLintPassObjects<'_> {
|
||||||
|
fn name(&self) -> &'static str {
|
||||||
|
panic!()
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
macro_rules! expand_early_lint_pass_impl_methods {
|
||||||
|
([$($(#[$attr:meta])* fn $name:ident($($param:ident: $arg:ty),*);)*]) => (
|
||||||
|
$(fn $name(&mut self, context: &EarlyContext<'_>, $($param: $arg),*) {
|
||||||
|
for obj in self.lints.iter_mut() {
|
||||||
|
obj.$name(context, $($param),*);
|
||||||
|
}
|
||||||
|
})*
|
||||||
|
)
|
||||||
|
}
|
||||||
|
|
||||||
|
macro_rules! early_lint_pass_impl {
|
||||||
|
([], [$($methods:tt)*]) => (
|
||||||
|
impl EarlyLintPass for EarlyLintPassObjects<'_> {
|
||||||
|
expand_early_lint_pass_impl_methods!([$($methods)*]);
|
||||||
|
}
|
||||||
|
)
|
||||||
|
}
|
||||||
|
|
||||||
|
early_lint_methods!(early_lint_pass_impl, []);
|
||||||
|
|
||||||
|
fn early_lint_crate<T: EarlyLintPass>(
|
||||||
|
sess: &Session,
|
||||||
|
lint_store: &LintStore,
|
||||||
|
krate: &ast::Crate,
|
||||||
|
pass: T,
|
||||||
|
buffered: LintBuffer,
|
||||||
|
warn_about_weird_lints: bool,
|
||||||
|
) -> LintBuffer {
|
||||||
|
let mut cx = EarlyContextAndPass {
|
||||||
|
context: EarlyContext::new(sess, lint_store, krate, buffered, warn_about_weird_lints),
|
||||||
|
pass,
|
||||||
|
};
|
||||||
|
|
||||||
|
// Visit the whole crate.
|
||||||
|
cx.with_lint_attrs(ast::CRATE_NODE_ID, &krate.attrs, |cx| {
|
||||||
|
// since the root module isn't visited as an item (because it isn't an
|
||||||
|
// item), warn for it here.
|
||||||
|
run_early_pass!(cx, check_crate, krate);
|
||||||
|
|
||||||
|
ast_visit::walk_crate(cx, krate);
|
||||||
|
|
||||||
|
run_early_pass!(cx, check_crate_post, krate);
|
||||||
|
});
|
||||||
|
cx.context.buffered
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn check_ast_crate<T: EarlyLintPass>(
|
||||||
|
sess: &Session,
|
||||||
|
lint_store: &LintStore,
|
||||||
|
krate: &ast::Crate,
|
||||||
|
pre_expansion: bool,
|
||||||
|
lint_buffer: Option<LintBuffer>,
|
||||||
|
builtin_lints: T,
|
||||||
|
) {
|
||||||
|
let mut passes: Vec<_> = if pre_expansion {
|
||||||
|
lint_store.pre_expansion_passes.iter().map(|p| (p)()).collect()
|
||||||
|
} else {
|
||||||
|
lint_store.early_passes.iter().map(|p| (p)()).collect()
|
||||||
|
};
|
||||||
|
let mut buffered = lint_buffer.unwrap_or_default();
|
||||||
|
|
||||||
|
if !sess.opts.debugging_opts.no_interleave_lints {
|
||||||
|
buffered =
|
||||||
|
early_lint_crate(sess, lint_store, krate, builtin_lints, buffered, pre_expansion);
|
||||||
|
|
||||||
|
if !passes.is_empty() {
|
||||||
|
buffered = early_lint_crate(
|
||||||
|
sess,
|
||||||
|
lint_store,
|
||||||
|
krate,
|
||||||
|
EarlyLintPassObjects { lints: &mut passes[..] },
|
||||||
|
buffered,
|
||||||
|
pre_expansion,
|
||||||
|
);
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
for pass in &mut passes {
|
||||||
|
buffered = time(sess, &format!("running lint: {}", pass.name()), || {
|
||||||
|
early_lint_crate(
|
||||||
|
sess,
|
||||||
|
lint_store,
|
||||||
|
krate,
|
||||||
|
EarlyLintPassObjects { lints: slice::from_mut(pass) },
|
||||||
|
buffered,
|
||||||
|
pre_expansion,
|
||||||
|
)
|
||||||
|
});
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// All of the buffered lints should have been emitted at this point.
|
||||||
|
// If not, that means that we somehow buffered a lint for a node id
|
||||||
|
// that was not lint-checked (perhaps it doesn't exist?). This is a bug.
|
||||||
|
//
|
||||||
|
// Rustdoc runs everybody-loops before the early lints and removes
|
||||||
|
// function bodies, so it's totally possible for linted
|
||||||
|
// node ids to not exist (e.g., macros defined within functions for the
|
||||||
|
// unused_macro lint) anymore. So we only run this check
|
||||||
|
// when we're not in rustdoc mode. (see issue #47639)
|
||||||
|
if !sess.opts.actually_rustdoc {
|
||||||
|
for (_id, lints) in buffered.map {
|
||||||
|
for early_lint in lints {
|
||||||
|
sess.delay_span_bug(early_lint.span, "failed to process buffered lint here");
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
@ -24,6 +24,7 @@ extern crate rustc_session;
|
||||||
|
|
||||||
mod array_into_iter;
|
mod array_into_iter;
|
||||||
pub mod builtin;
|
pub mod builtin;
|
||||||
|
mod early;
|
||||||
mod non_ascii_idents;
|
mod non_ascii_idents;
|
||||||
mod nonstandard_style;
|
mod nonstandard_style;
|
||||||
mod redundant_semicolon;
|
mod redundant_semicolon;
|
||||||
|
|
@ -57,6 +58,7 @@ use unused::*;
|
||||||
|
|
||||||
/// Useful for other parts of the compiler.
|
/// Useful for other parts of the compiler.
|
||||||
pub use builtin::SoftLints;
|
pub use builtin::SoftLints;
|
||||||
|
pub use early::check_ast_crate;
|
||||||
|
|
||||||
pub fn provide(providers: &mut Providers<'_>) {
|
pub fn provide(providers: &mut Providers<'_>) {
|
||||||
*providers = Providers { lint_mod, ..*providers };
|
*providers = Providers { lint_mod, ..*providers };
|
||||||
|
|
|
||||||
Loading…
Add table
Add a link
Reference in a new issue