//! `LintPass` (also, note that such lints will need to be defined in
//! `rustc::lint::builtin`, not here).
//!
-//! If you define a new `LintPass`, you will also need to add it to the
-//! `add_builtin!` or `add_builtin_with_new!` invocation in `lib.rs`.
-//! Use the former for unit-like structs and the latter for structs with
-//! a `pub fn new()`.
+//! If you define a new `EarlyLintPass`, you will also need to add it to the
+//! `add_early_builtin!` or `add_early_builtin_with_new!` invocation in
+//! `lib.rs`. Use the former for unit-like structs and the latter for structs
+//! with a `pub fn new()`.
+//!
+//! If you define a new `LateLintPass`, you will also need to add it to the
+//! `late_lint_methods!` invocation in `lib.rs`.
use rustc::hir::def::Def;
use rustc::hir::def_id::{DefId, LOCAL_CRATE};
use rustc::ty::{self, Ty};
+use rustc::{lint, util};
use hir::Node;
use util::nodemap::NodeSet;
use lint::{LateContext, LintContext, LintArray};
use syntax::errors::{Applicability, DiagnosticBuilder};
use syntax::print::pprust::expr_to_string;
use syntax::visit::FnKind;
+use syntax::struct_span_err;
use rustc::hir::{self, GenericParamKind, PatKind};
-use nonstandard_style::{MethodLateContext, method_context};
+use crate::nonstandard_style::{MethodLateContext, method_context};
+
+use log::debug;
// hardwired lints from librustc
pub use lint::builtin::*;
}
impl<'a, 'tcx> LateLintPass<'a, 'tcx> for WhileTrue {
- fn check_expr(&mut self, cx: &LateContext, e: &hir::Expr) {
+ fn check_expr(&mut self, cx: &LateContext<'_, '_>, e: &hir::Expr) {
if let hir::ExprKind::While(ref cond, ..) = e.node {
if let hir::ExprKind::Lit(ref lit) = cond.node {
if let ast::LitKind::Bool(true) = lit.node {
pub struct BoxPointers;
impl BoxPointers {
- fn check_heap_type<'a, 'tcx>(&self, cx: &LateContext, span: Span, ty: Ty) {
+ fn check_heap_type<'a, 'tcx>(&self, cx: &LateContext<'_, '_>, span: Span, ty: Ty<'_>) {
for leaf_ty in ty.walk() {
if leaf_ty.is_box() {
let m = format!("type uses owned (Box type) pointers: {}", ty);
}
impl<'a, 'tcx> LateLintPass<'a, 'tcx> for BoxPointers {
- fn check_item(&mut self, cx: &LateContext, it: &hir::Item) {
+ fn check_item(&mut self, cx: &LateContext<'_, '_>, it: &hir::Item) {
match it.node {
hir::ItemKind::Fn(..) |
hir::ItemKind::Ty(..) |
}
}
- fn check_expr(&mut self, cx: &LateContext, e: &hir::Expr) {
- let ty = cx.tables.node_id_to_type(e.hir_id);
+ fn check_expr(&mut self, cx: &LateContext<'_, '_>, e: &hir::Expr) {
+ let ty = cx.tables.node_type(e.hir_id);
self.check_heap_type(cx, e.span, ty);
}
}
}
impl<'a, 'tcx> LateLintPass<'a, 'tcx> for NonShorthandFieldPatterns {
- fn check_pat(&mut self, cx: &LateContext, pat: &hir::Pat) {
+ fn check_pat(&mut self, cx: &LateContext<'_, '_>, pat: &hir::Pat) {
if let PatKind::Struct(ref qpath, ref field_pats, _) = pat.node {
let variant = cx.tables.pat_ty(pat).ty_adt_def()
.expect("struct pattern type is not an ADT")
}
impl UnsafeCode {
- fn report_unsafe(&self, cx: &EarlyContext, span: Span, desc: &'static str) {
+ fn report_unsafe(&self, cx: &EarlyContext<'_>, span: Span, desc: &'static str) {
// This comes from a macro that has #[allow_internal_unsafe].
if span.allows_unsafe() {
return;
}
impl EarlyLintPass for UnsafeCode {
- fn check_attribute(&mut self, cx: &EarlyContext, attr: &ast::Attribute) {
+ fn check_attribute(&mut self, cx: &EarlyContext<'_>, attr: &ast::Attribute) {
if attr.check_name("allow_internal_unsafe") {
self.report_unsafe(cx, attr.span, "`allow_internal_unsafe` allows defining \
macros using unsafe without triggering \
}
}
- fn check_expr(&mut self, cx: &EarlyContext, e: &ast::Expr) {
+ fn check_expr(&mut self, cx: &EarlyContext<'_>, e: &ast::Expr) {
if let ast::ExprKind::Block(ref blk, _) = e.node {
// Don't warn about generated blocks, that'll just pollute the output.
if blk.rules == ast::BlockCheckMode::Unsafe(ast::UserProvided) {
}
}
- fn check_item(&mut self, cx: &EarlyContext, it: &ast::Item) {
+ fn check_item(&mut self, cx: &EarlyContext<'_>, it: &ast::Item) {
match it.node {
ast::ItemKind::Trait(_, ast::Unsafety::Unsafe, ..) => {
self.report_unsafe(cx, it.span, "declaration of an `unsafe` trait")
}
fn check_fn(&mut self,
- cx: &EarlyContext,
- fk: FnKind,
+ cx: &EarlyContext<'_>,
+ fk: FnKind<'_>,
_: &ast::FnDecl,
span: Span,
_: ast::NodeId) {
}
}
- fn check_trait_item(&mut self, cx: &EarlyContext, item: &ast::TraitItem) {
+ fn check_trait_item(&mut self, cx: &EarlyContext<'_>, item: &ast::TraitItem) {
if let ast::TraitItemKind::Method(ref sig, None) = item.node {
if sig.header.unsafety == ast::Unsafety::Unsafe {
self.report_unsafe(cx, item.span, "declaration of an `unsafe` method")
}
pub struct MissingDoc {
- /// Stack of whether #[doc(hidden)] is set
- /// at each level which has lint attributes.
+ /// Stack of whether `#[doc(hidden)]` is set at each level which has lint attributes.
doc_hidden_stack: Vec<bool>,
/// Private traits or trait items that leaked through. Don't check their methods.
}
fn check_missing_docs_attrs(&self,
- cx: &LateContext,
+ cx: &LateContext<'_, '_>,
id: Option<ast::NodeId>,
attrs: &[ast::Attribute],
sp: Span,
}
impl<'a, 'tcx> LateLintPass<'a, 'tcx> for MissingDoc {
- fn enter_lint_attrs(&mut self, _: &LateContext, attrs: &[ast::Attribute]) {
+ fn enter_lint_attrs(&mut self, _: &LateContext<'_, '_>, attrs: &[ast::Attribute]) {
let doc_hidden = self.doc_hidden() ||
attrs.iter().any(|attr| {
attr.check_name("doc") &&
self.doc_hidden_stack.push(doc_hidden);
}
- fn exit_lint_attrs(&mut self, _: &LateContext, _attrs: &[ast::Attribute]) {
+ fn exit_lint_attrs(&mut self, _: &LateContext<'_, '_>, _attrs: &[ast::Attribute]) {
self.doc_hidden_stack.pop().expect("empty doc_hidden_stack");
}
- fn check_crate(&mut self, cx: &LateContext, krate: &hir::Crate) {
+ fn check_crate(&mut self, cx: &LateContext<'_, '_>, krate: &hir::Crate) {
self.check_missing_docs_attrs(cx, None, &krate.attrs, krate.span, "crate");
for macro_def in &krate.exported_macros {
}
}
- fn check_item(&mut self, cx: &LateContext, it: &hir::Item) {
+ fn check_item(&mut self, cx: &LateContext<'_, '_>, it: &hir::Item) {
let desc = match it.node {
hir::ItemKind::Fn(..) => "a function",
hir::ItemKind::Mod(..) => "a module",
self.check_missing_docs_attrs(cx, Some(it.id), &it.attrs, it.span, desc);
}
- fn check_trait_item(&mut self, cx: &LateContext, trait_item: &hir::TraitItem) {
+ fn check_trait_item(&mut self, cx: &LateContext<'_, '_>, trait_item: &hir::TraitItem) {
if self.private_traits.contains(&trait_item.id) {
return;
}
desc);
}
- fn check_impl_item(&mut self, cx: &LateContext, impl_item: &hir::ImplItem) {
+ fn check_impl_item(&mut self, cx: &LateContext<'_, '_>, impl_item: &hir::ImplItem) {
// If the method is an impl for a trait, don't doc.
if method_context(cx, impl_item.id) == MethodLateContext::TraitImpl {
return;
desc);
}
- fn check_struct_field(&mut self, cx: &LateContext, sf: &hir::StructField) {
+ fn check_struct_field(&mut self, cx: &LateContext<'_, '_>, sf: &hir::StructField) {
if !sf.is_positional() {
self.check_missing_docs_attrs(cx,
Some(sf.id),
}
}
- fn check_variant(&mut self, cx: &LateContext, v: &hir::Variant, _: &hir::Generics) {
+ fn check_variant(&mut self, cx: &LateContext<'_, '_>, v: &hir::Variant, _: &hir::Generics) {
self.check_missing_docs_attrs(cx,
Some(v.node.data.id()),
&v.node.attrs,
}
impl<'a, 'tcx> LateLintPass<'a, 'tcx> for MissingCopyImplementations {
- fn check_item(&mut self, cx: &LateContext, item: &hir::Item) {
+ fn check_item(&mut self, cx: &LateContext<'_, '_>, item: &hir::Item) {
if !cx.access_levels.is_reachable(item.id) {
return;
}
}
impl<'a, 'tcx> LateLintPass<'a, 'tcx> for MissingDebugImplementations {
- fn check_item(&mut self, cx: &LateContext, item: &hir::Item) {
+ fn check_item(&mut self, cx: &LateContext<'_, '_>, item: &hir::Item) {
if !cx.access_levels.is_reachable(item.id) {
return;
}
"detects anonymous parameters"
}
-/// Checks for use of anonymous parameters (RFC 1685)
-#[derive(Clone)]
+/// Checks for use of anonymous parameters (RFC 1685).
+#[derive(Copy, Clone)]
pub struct AnonymousParameters;
impl LintPass for AnonymousParameters {
}
impl EarlyLintPass for AnonymousParameters {
- fn check_trait_item(&mut self, cx: &EarlyContext, it: &ast::TraitItem) {
+ fn check_trait_item(&mut self, cx: &EarlyContext<'_>, it: &ast::TraitItem) {
match it.node {
ast::TraitItemKind::Method(ref sig, _) => {
for arg in sig.decl.inputs.iter() {
}
}
-/// Checks for use of attributes which have been deprecated.
+/// Check for use of attributes which have been deprecated.
#[derive(Clone)]
pub struct DeprecatedAttr {
// This is not free to compute, so we want to keep it around, rather than
}
impl EarlyLintPass for DeprecatedAttr {
- fn check_attribute(&mut self, cx: &EarlyContext, attr: &ast::Attribute) {
+ fn check_attribute(&mut self, cx: &EarlyContext<'_>, attr: &ast::Attribute) {
for &&(n, _, _, ref g) in &self.depr_attrs {
if attr.name() == n {
if let &AttributeGate::Gated(Stability::Deprecated(link, suggestion),
}
impl EarlyLintPass for UnusedDocComment {
- fn check_local(&mut self, cx: &EarlyContext, decl: &ast::Local) {
+ fn check_local(&mut self, cx: &EarlyContext<'_>, decl: &ast::Local) {
self.warn_if_doc(decl.attrs.iter(), cx);
}
- fn check_arm(&mut self, cx: &EarlyContext, arm: &ast::Arm) {
+ fn check_arm(&mut self, cx: &EarlyContext<'_>, arm: &ast::Arm) {
self.warn_if_doc(arm.attrs.iter(), cx);
}
- fn check_expr(&mut self, cx: &EarlyContext, expr: &ast::Expr) {
+ fn check_expr(&mut self, cx: &EarlyContext<'_>, expr: &ast::Expr) {
self.warn_if_doc(expr.attrs.iter(), cx);
}
}
}
impl<'a, 'tcx> LateLintPass<'a, 'tcx> for PluginAsLibrary {
- fn check_item(&mut self, cx: &LateContext, it: &hir::Item) {
+ fn check_item(&mut self, cx: &LateContext<'_, '_>, it: &hir::Item) {
if cx.tcx.plugin_registrar_fn(LOCAL_CRATE).is_some() {
// We're compiling a plugin; it's fine to link other plugins.
return;
}
impl<'a, 'tcx> LateLintPass<'a, 'tcx> for InvalidNoMangleItems {
- fn check_item(&mut self, cx: &LateContext, it: &hir::Item) {
+ fn check_item(&mut self, cx: &LateContext<'_, '_>, it: &hir::Item) {
match it.node {
hir::ItemKind::Fn(.., ref generics, _) => {
if let Some(no_mangle_attr) = attr::find_by_name(&it.attrs, "no_mangle") {
for param in &generics.params {
match param.kind {
GenericParamKind::Lifetime { .. } => {}
- GenericParamKind::Type { .. } => {
- let mut err = cx.struct_span_lint(NO_MANGLE_GENERIC_ITEMS,
- it.span,
- "functions generic over \
- types must be mangled");
+ GenericParamKind::Type { .. } |
+ GenericParamKind::Const { .. } => {
+ let mut err = cx.struct_span_lint(
+ NO_MANGLE_GENERIC_ITEMS,
+ it.span,
+ "functions generic over types or consts must be mangled",
+ );
err.span_suggestion_short(
no_mangle_attr.span,
"remove this attribute",
}
impl<'a, 'tcx> LateLintPass<'a, 'tcx> for MutableTransmutes {
- fn check_expr(&mut self, cx: &LateContext, expr: &hir::Expr) {
+ fn check_expr(&mut self, cx: &LateContext<'_, '_>, expr: &hir::Expr) {
use rustc_target::spec::abi::Abi::RustIntrinsic;
let msg = "mutating transmuted &mut T from &T may cause undefined behavior, \
if !def_id_is_transmute(cx, did) {
return None;
}
- let sig = cx.tables.node_id_to_type(expr.hir_id).fn_sig(cx.tcx);
+ let sig = cx.tables.node_type(expr.hir_id).fn_sig(cx.tcx);
let from = sig.inputs().skip_binder()[0];
let to = *sig.output().skip_binder();
return Some((&from.sty, &to.sty));
None
}
- fn def_id_is_transmute(cx: &LateContext, def_id: DefId) -> bool {
+ fn def_id_is_transmute(cx: &LateContext<'_, '_>, def_id: DefId) -> bool {
cx.tcx.fn_sig(def_id).abi() == RustIntrinsic &&
cx.tcx.item_name(def_id) == "transmute"
}
}
impl<'a, 'tcx> LateLintPass<'a, 'tcx> for UnstableFeatures {
- fn check_attribute(&mut self, ctx: &LateContext, attr: &ast::Attribute) {
+ fn check_attribute(&mut self, ctx: &LateContext<'_, '_>, attr: &ast::Attribute) {
if attr.check_name("feature") {
if let Some(items) = attr.meta_item_list() {
for item in items {
}
impl<'a, 'tcx> LateLintPass<'a, 'tcx> for UnionsWithDropFields {
- fn check_item(&mut self, ctx: &LateContext, item: &hir::Item) {
+ fn check_item(&mut self, ctx: &LateContext<'_, '_>, item: &hir::Item) {
if let hir::ItemKind::Union(ref vdata, _) = item.node {
for field in vdata.fields() {
let field_ty = ctx.tcx.type_of(ctx.tcx.hir().local_def_id(field.id));
}
}
-/// Lint for items marked `pub` that aren't reachable from other crates
+/// Lint for items marked `pub` that aren't reachable from other crates.
+#[derive(Copy, Clone)]
pub struct UnreachablePub;
declare_lint! {
}
impl UnreachablePub {
- fn perform_lint(&self, cx: &LateContext, what: &str, id: ast::NodeId,
+ fn perform_lint(&self, cx: &LateContext<'_, '_>, what: &str, id: ast::NodeId,
vis: &hir::Visibility, span: Span, exportable: bool) {
let mut applicability = Applicability::MachineApplicable;
match vis.node {
impl<'a, 'tcx> LateLintPass<'a, 'tcx> for UnreachablePub {
- fn check_item(&mut self, cx: &LateContext, item: &hir::Item) {
+ fn check_item(&mut self, cx: &LateContext<'_, '_>, item: &hir::Item) {
self.perform_lint(cx, "item", item.id, &item.vis, item.span, true);
}
- fn check_foreign_item(&mut self, cx: &LateContext, foreign_item: &hir::ForeignItem) {
+ fn check_foreign_item(&mut self, cx: &LateContext<'_, '_>, foreign_item: &hir::ForeignItem) {
self.perform_lint(cx, "item", foreign_item.id, &foreign_item.vis,
foreign_item.span, true);
}
- fn check_struct_field(&mut self, cx: &LateContext, field: &hir::StructField) {
+ fn check_struct_field(&mut self, cx: &LateContext<'_, '_>, field: &hir::StructField) {
self.perform_lint(cx, "field", field.id, &field.vis, field.span, false);
}
- fn check_impl_item(&mut self, cx: &LateContext, impl_item: &hir::ImplItem) {
+ fn check_impl_item(&mut self, cx: &LateContext<'_, '_>, impl_item: &hir::ImplItem) {
self.perform_lint(cx, "item", impl_item.id, &impl_item.vis, impl_item.span, false);
}
}
-/// Lint for trait and lifetime bounds in type aliases being mostly ignored:
+/// Lint for trait and lifetime bounds in type aliases being mostly ignored.
/// They are relevant when using associated types, but otherwise neither checked
/// at definition site nor enforced at use site.
}
}
- fn suggest_changing_assoc_types(ty: &hir::Ty, err: &mut DiagnosticBuilder) {
+ fn suggest_changing_assoc_types(ty: &hir::Ty, err: &mut DiagnosticBuilder<'_>) {
// Access to associates types should use `<T as Bound>::Assoc`, which does not need a
// bound. Let's see if this type does that.
}
impl<'a, 'tcx> LateLintPass<'a, 'tcx> for TypeAliasBounds {
- fn check_item(&mut self, cx: &LateContext, item: &hir::Item) {
+ fn check_item(&mut self, cx: &LateContext<'_, '_>, item: &hir::Item) {
let (ty, type_alias_generics) = match item.node {
hir::ItemKind::Ty(ref ty, ref generics) => (&*ty, generics),
_ => return,
lint_array!()
}
}
-fn check_const(cx: &LateContext, body_id: hir::BodyId) {
+fn check_const(cx: &LateContext<'_, '_>, body_id: hir::BodyId) {
let def_id = cx.tcx.hir().body_owner_def_id(body_id);
let is_static = cx.tcx.is_static(def_id).is_some();
let param_env = if is_static {
}
impl<'a, 'tcx> LateLintPass<'a, 'tcx> for UnusedBrokenConst {
- fn check_item(&mut self, cx: &LateContext, it: &hir::Item) {
+ fn check_item(&mut self, cx: &LateContext<'_, '_>, it: &hir::Item) {
match it.node {
hir::ItemKind::Const(_, body_id) => {
check_const(cx, body_id);
}
impl EarlyLintPass for EllipsisInclusiveRangePatterns {
- fn check_pat(&mut self, cx: &EarlyContext, pat: &ast::Pat, visit_subpats: &mut bool) {
+ fn check_pat(&mut self, cx: &EarlyContext<'_>, pat: &ast::Pat, visit_subpats: &mut bool) {
use self::ast::{PatKind, RangeEnd, RangeSyntax::DotDotDot};
/// If `pat` is a `...` pattern, return the start and end of the range, as well as the span
}
impl<'a, 'tcx> LateLintPass<'a, 'tcx> for UnnameableTestItems {
- fn check_item(&mut self, cx: &LateContext, it: &hir::Item) {
+ fn check_item(&mut self, cx: &LateContext<'_, '_>, it: &hir::Item) {
if self.items_nameable {
if let hir::ItemKind::Mod(..) = it.node {}
else {
}
}
- fn check_item_post(&mut self, _cx: &LateContext, it: &hir::Item) {
+ fn check_item_post(&mut self, _cx: &LateContext<'_, '_>, it: &hir::Item) {
if !self.items_nameable && self.boundary == it.id {
self.items_nameable = true;
}
"detects edition keywords being used as an identifier"
}
-/// Checks for uses of edition keywords used as an identifier
-#[derive(Clone)]
+/// Check for uses of edition keywords used as an identifier.
+#[derive(Copy, Clone)]
pub struct KeywordIdents;
impl LintPass for KeywordIdents {
}
impl KeywordIdents {
- fn check_tokens(&mut self, cx: &EarlyContext, tokens: TokenStream) {
+ fn check_tokens(&mut self, cx: &EarlyContext<'_>, tokens: TokenStream) {
for tt in tokens.into_trees() {
match tt {
TokenTree::Token(span, tok) => match tok.ident() {
}
impl EarlyLintPass for KeywordIdents {
- fn check_mac_def(&mut self, cx: &EarlyContext, mac_def: &ast::MacroDef, _id: ast::NodeId) {
+ fn check_mac_def(&mut self, cx: &EarlyContext<'_>, mac_def: &ast::MacroDef, _id: ast::NodeId) {
self.check_tokens(cx, mac_def.stream());
}
- fn check_mac(&mut self, cx: &EarlyContext, mac: &ast::Mac) {
+ fn check_mac(&mut self, cx: &EarlyContext<'_>, mac: &ast::Mac) {
self.check_tokens(cx, mac.node.tts.clone().into());
}
- fn check_ident(&mut self, cx: &EarlyContext, ident: ast::Ident) {
+ fn check_ident(&mut self, cx: &EarlyContext<'_>, ident: ast::Ident) {
let ident_str = &ident.as_str()[..];
let cur_edition = cx.sess.edition();
let is_raw_ident = |ident: ast::Ident| {
impl ExplicitOutlivesRequirements {
fn collect_outlives_bound_spans(
&self,
- cx: &LateContext,
+ cx: &LateContext<'_, '_>,
item_def_id: DefId,
param_name: &str,
bounds: &hir::GenericBounds,
for param in &generics.params {
let param_name = match param.kind {
- hir::GenericParamKind::Lifetime { .. } => { continue; },
+ hir::GenericParamKind::Lifetime { .. } => continue,
hir::GenericParamKind::Type { .. } => {
match param.name {
- hir::ParamName::Fresh(_) => { continue; },
- hir::ParamName::Error => { continue; },
- hir::ParamName::Plain(name) => name.to_string()
+ hir::ParamName::Fresh(_) => continue,
+ hir::ParamName::Error => continue,
+ hir::ParamName::Plain(name) => name.to_string(),
}
}
+ hir::GenericParamKind::Const { .. } => continue,
};
let bound_spans = self.collect_outlives_bound_spans(
cx, def_id, ¶m_name, ¶m.bounds, infer_static
projects / rust.git / blobdiff