use crate::reexport::*;
use crate::utils::{
- in_macro, last_line_of_span, match_def_path, opt_def_id, paths, snippet_opt, span_lint, span_lint_and_sugg,
- span_lint_and_then, without_block_comments,
+ in_macro, last_line_of_span, paths, snippet_opt, span_lint, span_lint_and_sugg, span_lint_and_then,
+ without_block_comments,
};
use if_chain::if_chain;
use rustc::hir::*;
use rustc::lint::{
- CheckLintNameResult, EarlyContext, EarlyLintPass, LateContext, LateLintPass, LintArray, LintContext, LintPass,
+ in_external_macro, CheckLintNameResult, EarlyContext, EarlyLintPass, LateContext, LateLintPass, LintArray,
+ LintContext, LintPass,
};
-use rustc::ty::{self, TyCtxt};
-use rustc::{declare_tool_lint, lint_array};
+use rustc::ty;
+use rustc::{declare_lint_pass, declare_tool_lint};
use rustc_errors::Applicability;
use semver::Version;
-use syntax::ast::{AttrStyle, Attribute, Lit, LitKind, MetaItemKind, NestedMetaItem, NestedMetaItemKind};
+use syntax::ast::{AttrStyle, Attribute, Lit, LitKind, MetaItemKind, NestedMetaItem};
use syntax::source_map::Span;
-/// **What it does:** Checks for items annotated with `#[inline(always)]`,
-/// unless the annotated function is empty or simply panics.
-///
-/// **Why is this bad?** While there are valid uses of this annotation (and once
-/// you know when to use it, by all means `allow` this lint), it's a common
-/// newbie-mistake to pepper one's code with it.
-///
-/// As a rule of thumb, before slapping `#[inline(always)]` on a function,
-/// measure if that additional function call really affects your runtime profile
-/// sufficiently to make up for the increase in compile time.
-///
-/// **Known problems:** False positives, big time. This lint is meant to be
-/// deactivated by everyone doing serious performance work. This means having
-/// done the measurement.
-///
-/// **Example:**
-/// ```rust
-/// #[inline(always)]
-/// fn not_quite_hot_code(..) { ... }
-/// ```
declare_clippy_lint! {
+ /// **What it does:** Checks for items annotated with `#[inline(always)]`,
+ /// unless the annotated function is empty or simply panics.
+ ///
+ /// **Why is this bad?** While there are valid uses of this annotation (and once
+ /// you know when to use it, by all means `allow` this lint), it's a common
+ /// newbie-mistake to pepper one's code with it.
+ ///
+ /// As a rule of thumb, before slapping `#[inline(always)]` on a function,
+ /// measure if that additional function call really affects your runtime profile
+ /// sufficiently to make up for the increase in compile time.
+ ///
+ /// **Known problems:** False positives, big time. This lint is meant to be
+ /// deactivated by everyone doing serious performance work. This means having
+ /// done the measurement.
+ ///
+ /// **Example:**
+ /// ```ignore
+ /// #[inline(always)]
+ /// fn not_quite_hot_code(..) { ... }
+ /// ```
pub INLINE_ALWAYS,
pedantic,
"use of `#[inline(always)]`"
}
-/// **What it does:** Checks for `extern crate` and `use` items annotated with
-/// lint attributes.
-///
-/// This lint whitelists `#[allow(unused_imports)]` and `#[allow(deprecated)]` on
-/// `use` items and `#[allow(unused_imports)]` on `extern crate` items with a
-/// `#[macro_use]` attribute.
-///
-/// **Why is this bad?** Lint attributes have no effect on crate imports. Most
-/// likely a `!` was forgotten.
-///
-/// **Known problems:** None.
-///
-/// **Example:**
-/// ```rust
-/// // Bad
-/// #[deny(dead_code)]
-/// extern crate foo;
-/// #[forbid(dead_code)]
-/// use foo::bar;
-///
-/// // Ok
-/// #[allow(unused_imports)]
-/// use foo::baz;
-/// #[allow(unused_imports)]
-/// #[macro_use]
-/// extern crate baz;
-/// ```
declare_clippy_lint! {
+ /// **What it does:** Checks for `extern crate` and `use` items annotated with
+ /// lint attributes.
+ ///
+ /// This lint whitelists `#[allow(unused_imports)]` and `#[allow(deprecated)]` on
+ /// `use` items and `#[allow(unused_imports)]` on `extern crate` items with a
+ /// `#[macro_use]` attribute.
+ ///
+ /// **Why is this bad?** Lint attributes have no effect on crate imports. Most
+ /// likely a `!` was forgotten.
+ ///
+ /// **Known problems:** None.
+ ///
+ /// **Example:**
+ /// ```ignore
+ /// // Bad
+ /// #[deny(dead_code)]
+ /// extern crate foo;
+ /// #[forbid(dead_code)]
+ /// use foo::bar;
+ ///
+ /// // Ok
+ /// #[allow(unused_imports)]
+ /// use foo::baz;
+ /// #[allow(unused_imports)]
+ /// #[macro_use]
+ /// extern crate baz;
+ /// ```
pub USELESS_ATTRIBUTE,
correctness,
"use of lint attributes on `extern crate` items"
}
-/// **What it does:** Checks for `#[deprecated]` annotations with a `since`
-/// field that is not a valid semantic version.
-///
-/// **Why is this bad?** For checking the version of the deprecation, it must be
-/// a valid semver. Failing that, the contained information is useless.
-///
-/// **Known problems:** None.
-///
-/// **Example:**
-/// ```rust
-/// #[deprecated(since = "forever")]
-/// fn something_else(..) { ... }
-/// ```
declare_clippy_lint! {
+ /// **What it does:** Checks for `#[deprecated]` annotations with a `since`
+ /// field that is not a valid semantic version.
+ ///
+ /// **Why is this bad?** For checking the version of the deprecation, it must be
+ /// a valid semver. Failing that, the contained information is useless.
+ ///
+ /// **Known problems:** None.
+ ///
+ /// **Example:**
+ /// ```rust
+ /// #[deprecated(since = "forever")]
+ /// fn something_else() { /* ... */ }
+ /// ```
pub DEPRECATED_SEMVER,
correctness,
"use of `#[deprecated(since = \"x\")]` where x is not semver"
}
-/// **What it does:** Checks for empty lines after outer attributes
-///
-/// **Why is this bad?**
-/// Most likely the attribute was meant to be an inner attribute using a '!'.
-/// If it was meant to be an outer attribute, then the following item
-/// should not be separated by empty lines.
-///
-/// **Known problems:** Can cause false positives.
-///
-/// From the clippy side it's difficult to detect empty lines between an attributes and the
-/// following item because empty lines and comments are not part of the AST. The parsing
-/// currently works for basic cases but is not perfect.
-///
-/// **Example:**
-/// ```rust
-/// // Bad
-/// #[inline(always)]
-///
-/// fn not_quite_good_code(..) { ... }
-///
-/// // Good (as inner attribute)
-/// #![inline(always)]
-///
-/// fn this_is_fine(..) { ... }
-///
-/// // Good (as outer attribute)
-/// #[inline(always)]
-/// fn this_is_fine_too(..) { ... }
-/// ```
declare_clippy_lint! {
+ /// **What it does:** Checks for empty lines after outer attributes
+ ///
+ /// **Why is this bad?**
+ /// Most likely the attribute was meant to be an inner attribute using a '!'.
+ /// If it was meant to be an outer attribute, then the following item
+ /// should not be separated by empty lines.
+ ///
+ /// **Known problems:** Can cause false positives.
+ ///
+ /// From the clippy side it's difficult to detect empty lines between an attributes and the
+ /// following item because empty lines and comments are not part of the AST. The parsing
+ /// currently works for basic cases but is not perfect.
+ ///
+ /// **Example:**
+ /// ```rust
+ /// // Bad
+ /// #[inline(always)]
+ ///
+ /// fn not_quite_good_code(..) { ... }
+ ///
+ /// // Good (as inner attribute)
+ /// #![inline(always)]
+ ///
+ /// fn this_is_fine(..) { ... }
+ ///
+ /// // Good (as outer attribute)
+ /// #[inline(always)]
+ /// fn this_is_fine_too(..) { ... }
+ /// ```
pub EMPTY_LINE_AFTER_OUTER_ATTR,
nursery,
"empty line after outer attribute"
}
-/// **What it does:** Checks for `allow`/`warn`/`deny`/`forbid` attributes with scoped clippy
-/// lints and if those lints exist in clippy. If there is a uppercase letter in the lint name
-/// (not the tool name) and a lowercase version of this lint exists, it will suggest to lowercase
-/// the lint name.
-///
-/// **Why is this bad?** A lint attribute with a mistyped lint name won't have an effect.
-///
-/// **Known problems:** None.
-///
-/// **Example:**
-/// Bad:
-/// ```rust
-/// #![warn(if_not_els)]
-/// #![deny(clippy::All)]
-/// ```
-///
-/// Good:
-/// ```rust
-/// #![warn(if_not_else)]
-/// #![deny(clippy::all)]
-/// ```
declare_clippy_lint! {
+ /// **What it does:** Checks for `allow`/`warn`/`deny`/`forbid` attributes with scoped clippy
+ /// lints and if those lints exist in clippy. If there is a uppercase letter in the lint name
+ /// (not the tool name) and a lowercase version of this lint exists, it will suggest to lowercase
+ /// the lint name.
+ ///
+ /// **Why is this bad?** A lint attribute with a mistyped lint name won't have an effect.
+ ///
+ /// **Known problems:** None.
+ ///
+ /// **Example:**
+ /// Bad:
+ /// ```rust
+ /// #![warn(if_not_els)]
+ /// #![deny(clippy::All)]
+ /// ```
+ ///
+ /// Good:
+ /// ```rust
+ /// #![warn(if_not_else)]
+ /// #![deny(clippy::all)]
+ /// ```
pub UNKNOWN_CLIPPY_LINTS,
style,
"unknown_lints for scoped Clippy lints"
}
-/// **What it does:** Checks for `#[cfg_attr(rustfmt, rustfmt_skip)]` and suggests to replace it
-/// with `#[rustfmt::skip]`.
-///
-/// **Why is this bad?** Since tool_attributes ([rust-lang/rust#44690](https://github.com/rust-lang/rust/issues/44690))
-/// are stable now, they should be used instead of the old `cfg_attr(rustfmt)` attributes.
-///
-/// **Known problems:** This lint doesn't detect crate level inner attributes, because they get
-/// processed before the PreExpansionPass lints get executed. See
-/// [#3123](https://github.com/rust-lang/rust-clippy/pull/3123#issuecomment-422321765)
-///
-/// **Example:**
-///
-/// Bad:
-/// ```rust
-/// #[cfg_attr(rustfmt, rustfmt_skip)]
-/// fn main() { }
-/// ```
-///
-/// Good:
-/// ```rust
-/// #[rustfmt::skip]
-/// fn main() { }
-/// ```
declare_clippy_lint! {
+ /// **What it does:** Checks for `#[cfg_attr(rustfmt, rustfmt_skip)]` and suggests to replace it
+ /// with `#[rustfmt::skip]`.
+ ///
+ /// **Why is this bad?** Since tool_attributes ([rust-lang/rust#44690](https://github.com/rust-lang/rust/issues/44690))
+ /// are stable now, they should be used instead of the old `cfg_attr(rustfmt)` attributes.
+ ///
+ /// **Known problems:** This lint doesn't detect crate level inner attributes, because they get
+ /// processed before the PreExpansionPass lints get executed. See
+ /// [#3123](https://github.com/rust-lang/rust-clippy/pull/3123#issuecomment-422321765)
+ ///
+ /// **Example:**
+ ///
+ /// Bad:
+ /// ```rust
+ /// #[cfg_attr(rustfmt, rustfmt_skip)]
+ /// fn main() { }
+ /// ```
+ ///
+ /// Good:
+ /// ```rust
+ /// #[rustfmt::skip]
+ /// fn main() { }
+ /// ```
pub DEPRECATED_CFG_ATTR,
complexity,
"usage of `cfg_attr(rustfmt)` instead of `tool_attributes`"
}
-#[derive(Copy, Clone)]
-pub struct AttrPass;
+declare_lint_pass!(Attributes => [
+ INLINE_ALWAYS,
+ DEPRECATED_SEMVER,
+ USELESS_ATTRIBUTE,
+ EMPTY_LINE_AFTER_OUTER_ATTR,
+ UNKNOWN_CLIPPY_LINTS,
+]);
-impl LintPass for AttrPass {
- fn get_lints(&self) -> LintArray {
- lint_array!(
- INLINE_ALWAYS,
- DEPRECATED_SEMVER,
- USELESS_ATTRIBUTE,
- EMPTY_LINE_AFTER_OUTER_ATTR,
- UNKNOWN_CLIPPY_LINTS,
- )
- }
-
- fn name(&self) -> &'static str {
- "Attributes"
- }
-}
-
-impl<'a, 'tcx> LateLintPass<'a, 'tcx> for AttrPass {
+impl<'a, 'tcx> LateLintPass<'a, 'tcx> for Attributes {
fn check_attribute(&mut self, cx: &LateContext<'a, 'tcx>, attr: &'tcx Attribute) {
if let Some(items) = &attr.meta_item_list() {
- match &*attr.name().as_str() {
- "allow" | "warn" | "deny" | "forbid" => {
- check_clippy_lint_names(cx, items);
- },
- _ => {},
- }
- if items.is_empty() || attr.name() != "deprecated" {
- return;
- }
- for item in items {
- if_chain! {
- if let NestedMetaItemKind::MetaItem(mi) = &item.node;
- if let MetaItemKind::NameValue(lit) = &mi.node;
- if mi.name() == "since";
- then {
- check_semver(cx, item.span, lit);
+ if let Some(ident) = attr.ident() {
+ match &*ident.as_str() {
+ "allow" | "warn" | "deny" | "forbid" => {
+ check_clippy_lint_names(cx, items);
+ },
+ _ => {},
+ }
+ if items.is_empty() || !attr.check_name("deprecated") {
+ return;
+ }
+ for item in items {
+ if_chain! {
+ if let NestedMetaItem::MetaItem(mi) = &item;
+ if let MetaItemKind::NameValue(lit) = &mi.node;
+ if mi.check_name("since");
+ then {
+ check_semver(cx, item.span(), lit);
+ }
}
}
}
}
fn check_item(&mut self, cx: &LateContext<'a, 'tcx>, item: &'tcx Item) {
- if is_relevant_item(cx.tcx, item) {
+ if is_relevant_item(cx, item) {
check_attrs(cx, item.span, item.ident.name, &item.attrs)
}
match item.node {
ItemKind::ExternCrate(..) | ItemKind::Use(..) => {
- let skip_unused_imports = item.attrs.iter().any(|attr| attr.name() == "macro_use");
+ let skip_unused_imports = item.attrs.iter().any(|attr| attr.check_name("macro_use"));
for attr in &item.attrs {
+ if in_external_macro(cx.sess(), attr.span) {
+ return;
+ }
if let Some(lint_list) = &attr.meta_item_list() {
- match &*attr.name().as_str() {
- "allow" | "warn" | "deny" | "forbid" => {
- // whitelist `unused_imports` and `deprecated` for `use` items
- // and `unused_imports` for `extern crate` items with `macro_use`
- for lint in lint_list {
- match item.node {
- ItemKind::Use(..) => {
- if is_word(lint, "unused_imports") || is_word(lint, "deprecated") {
- return;
- }
- },
- ItemKind::ExternCrate(..) => {
- if is_word(lint, "unused_imports") && skip_unused_imports {
- return;
- }
- if is_word(lint, "unused_extern_crates") {
- return;
- }
- },
- _ => {},
- }
- }
- let line_span = last_line_of_span(cx, attr.span);
-
- if let Some(mut sugg) = snippet_opt(cx, line_span) {
- if sugg.contains("#[") {
- span_lint_and_then(
- cx,
- USELESS_ATTRIBUTE,
- line_span,
- "useless lint attribute",
- |db| {
- sugg = sugg.replacen("#[", "#![", 1);
- db.span_suggestion(
- line_span,
- "if you just forgot a `!`, use",
- sugg,
- Applicability::MachineApplicable,
- );
+ if let Some(ident) = attr.ident() {
+ match &*ident.as_str() {
+ "allow" | "warn" | "deny" | "forbid" => {
+ // whitelist `unused_imports` and `deprecated` for `use` items
+ // and `unused_imports` for `extern crate` items with `macro_use`
+ for lint in lint_list {
+ match item.node {
+ ItemKind::Use(..) => {
+ if is_word(lint, "unused_imports") || is_word(lint, "deprecated") {
+ return;
+ }
},
- );
+ ItemKind::ExternCrate(..) => {
+ if is_word(lint, "unused_imports") && skip_unused_imports {
+ return;
+ }
+ if is_word(lint, "unused_extern_crates") {
+ return;
+ }
+ },
+ _ => {},
+ }
}
- }
- },
- _ => {},
+ let line_span = last_line_of_span(cx, attr.span);
+
+ if let Some(mut sugg) = snippet_opt(cx, line_span) {
+ if sugg.contains("#[") {
+ span_lint_and_then(
+ cx,
+ USELESS_ATTRIBUTE,
+ line_span,
+ "useless lint attribute",
+ |db| {
+ sugg = sugg.replacen("#[", "#![", 1);
+ db.span_suggestion(
+ line_span,
+ "if you just forgot a `!`, use",
+ sugg,
+ Applicability::MachineApplicable,
+ );
+ },
+ );
+ }
+ }
+ },
+ _ => {},
+ }
}
}
}
}
fn check_impl_item(&mut self, cx: &LateContext<'a, 'tcx>, item: &'tcx ImplItem) {
- if is_relevant_impl(cx.tcx, item) {
+ if is_relevant_impl(cx, item) {
check_attrs(cx, item.span, item.ident.name, &item.attrs)
}
}
fn check_trait_item(&mut self, cx: &LateContext<'a, 'tcx>, item: &'tcx TraitItem) {
- if is_relevant_trait(cx.tcx, item) {
+ if is_relevant_trait(cx, item) {
check_attrs(cx, item.span, item.ident.name, &item.attrs)
}
}
let lint_store = cx.lints();
for lint in items {
if_chain! {
- if let Some(word) = lint.word();
- if let Some(tool_name) = word.is_scoped();
+ if let Some(meta_item) = lint.meta_item();
+ if meta_item.path.segments.len() > 1;
+ if let tool_name = meta_item.path.segments[0].ident;
if tool_name.as_str() == "clippy";
- let name = word.name();
+ let name = meta_item.path.segments.last().unwrap().ident.name;
if let CheckLintNameResult::Tool(Err((None, _))) = lint_store.check_lint_name(
&name.as_str(),
Some(tool_name.as_str()),
span_lint_and_then(
cx,
UNKNOWN_CLIPPY_LINTS,
- lint.span,
+ lint.span(),
&format!("unknown clippy lint: clippy::{}", name),
|db| {
if name.as_str().chars().any(char::is_uppercase) {
CheckLintNameResult::NoLint(None) => (),
_ => {
db.span_suggestion(
- lint.span,
+ lint.span(),
"lowercase the lint name",
name_lower,
Applicability::MaybeIncorrect,
}
}
-fn is_relevant_item(tcx: TyCtxt<'_, '_, '_>, item: &Item) -> bool {
+fn is_relevant_item(cx: &LateContext<'_, '_>, item: &Item) -> bool {
if let ItemKind::Fn(_, _, _, eid) = item.node {
- is_relevant_expr(tcx, tcx.body_tables(eid), &tcx.hir().body(eid).value)
+ is_relevant_expr(cx, cx.tcx.body_tables(eid), &cx.tcx.hir().body(eid).value)
} else {
true
}
}
-fn is_relevant_impl(tcx: TyCtxt<'_, '_, '_>, item: &ImplItem) -> bool {
+fn is_relevant_impl(cx: &LateContext<'_, '_>, item: &ImplItem) -> bool {
match item.node {
- ImplItemKind::Method(_, eid) => is_relevant_expr(tcx, tcx.body_tables(eid), &tcx.hir().body(eid).value),
+ ImplItemKind::Method(_, eid) => is_relevant_expr(cx, cx.tcx.body_tables(eid), &cx.tcx.hir().body(eid).value),
_ => false,
}
}
-fn is_relevant_trait(tcx: TyCtxt<'_, '_, '_>, item: &TraitItem) -> bool {
+fn is_relevant_trait(cx: &LateContext<'_, '_>, item: &TraitItem) -> bool {
match item.node {
TraitItemKind::Method(_, TraitMethod::Required(_)) => true,
TraitItemKind::Method(_, TraitMethod::Provided(eid)) => {
- is_relevant_expr(tcx, tcx.body_tables(eid), &tcx.hir().body(eid).value)
+ is_relevant_expr(cx, cx.tcx.body_tables(eid), &cx.tcx.hir().body(eid).value)
},
_ => false,
}
}
-fn is_relevant_block(tcx: TyCtxt<'_, '_, '_>, tables: &ty::TypeckTables<'_>, block: &Block) -> bool {
+fn is_relevant_block(cx: &LateContext<'_, '_>, tables: &ty::TypeckTables<'_>, block: &Block) -> bool {
if let Some(stmt) = block.stmts.first() {
match &stmt.node {
StmtKind::Local(_) => true,
- StmtKind::Expr(expr) | StmtKind::Semi(expr) => is_relevant_expr(tcx, tables, expr),
+ StmtKind::Expr(expr) | StmtKind::Semi(expr) => is_relevant_expr(cx, tables, expr),
_ => false,
}
} else {
- block.expr.as_ref().map_or(false, |e| is_relevant_expr(tcx, tables, e))
+ block.expr.as_ref().map_or(false, |e| is_relevant_expr(cx, tables, e))
}
}
-fn is_relevant_expr(tcx: TyCtxt<'_, '_, '_>, tables: &ty::TypeckTables<'_>, expr: &Expr) -> bool {
+fn is_relevant_expr(cx: &LateContext<'_, '_>, tables: &ty::TypeckTables<'_>, expr: &Expr) -> bool {
match &expr.node {
- ExprKind::Block(block, _) => is_relevant_block(tcx, tables, block),
- ExprKind::Ret(Some(e)) => is_relevant_expr(tcx, tables, e),
+ ExprKind::Block(block, _) => is_relevant_block(cx, tables, block),
+ ExprKind::Ret(Some(e)) => is_relevant_expr(cx, tables, e),
ExprKind::Ret(None) | ExprKind::Break(_, None) => false,
ExprKind::Call(path_expr, _) => {
if let ExprKind::Path(qpath) = &path_expr.node {
- if let Some(fun_id) = opt_def_id(tables.qpath_def(qpath, path_expr.hir_id)) {
- !match_def_path(tcx, fun_id, &paths::BEGIN_PANIC)
+ if let Some(fun_id) = tables.qpath_def(qpath, path_expr.hir_id).opt_def_id() {
+ !cx.match_def_path(fun_id, &paths::BEGIN_PANIC)
} else {
true
}
}
if let Some(values) = attr.meta_item_list() {
- if values.len() != 1 || attr.name() != "inline" {
+ if values.len() != 1 || !attr.check_name("inline") {
continue;
}
if is_word(&values[0], "always") {
}
fn is_word(nmi: &NestedMetaItem, expected: &str) -> bool {
- if let NestedMetaItemKind::MetaItem(mi) = &nmi.node {
- mi.is_word() && mi.name() == expected
+ if let NestedMetaItem::MetaItem(mi) = &nmi {
+ mi.is_word() && mi.check_name(expected)
} else {
false
}
true
}
-#[derive(Copy, Clone)]
-pub struct CfgAttrPass;
-
-impl LintPass for CfgAttrPass {
- fn get_lints(&self) -> LintArray {
- lint_array!(DEPRECATED_CFG_ATTR,)
- }
-
- fn name(&self) -> &'static str {
- "DeprecatedCfgAttribute"
- }
-}
+declare_lint_pass!(DeprecatedCfgAttribute => [DEPRECATED_CFG_ATTR]);
-impl EarlyLintPass for CfgAttrPass {
+impl EarlyLintPass for DeprecatedCfgAttribute {
fn check_attribute(&mut self, cx: &EarlyContext<'_>, attr: &Attribute) {
if_chain! {
// check cfg_attr
- if attr.name() == "cfg_attr";
+ if attr.check_name("cfg_attr");
if let Some(items) = attr.meta_item_list();
if items.len() == 2;
// check for `rustfmt`
if let Some(feature_item) = items[0].meta_item();
- if feature_item.name() == "rustfmt";
+ if feature_item.check_name("rustfmt");
// check for `rustfmt_skip` and `rustfmt::skip`
if let Some(skip_item) = &items[1].meta_item();
- if skip_item.name() == "rustfmt_skip" || skip_item.name() == "skip";
+ if skip_item.check_name("rustfmt_skip") ||
+ skip_item.path.segments.last().expect("empty path in attribute").ident.name == "skip";
// Only lint outer attributes, because custom inner attributes are unstable
// Tracking issue: https://github.com/rust-lang/rust/issues/54726
if let AttrStyle::Outer = attr.style;
projects / rust.git / blobdiff