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Rollup merge of #82578 - camsteffen:diag-items, r=oli-obk 

Add some diagnostic items for Clippy
This commit is contained in:
Joshua Nelson 2021-03-01 11:25:07 -05:00 committed by GitHub
parent 4f14f17485 6a3b834b39
commit efb9ee2df5
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GPG Key ID: 4AEE18F83AFDEB23
15 changed files with 55 additions and 41 deletions
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8
compiler/rustc_span/src/symbol.rs
View File

@ -126,6 +126,9 @@ symbols! {
Argument,
ArgumentV1,
Arguments,
BTreeMap,
BTreeSet,
BinaryHeap,
C,
CString,
Center,
@ -163,6 +166,7 @@ symbols! {
Iterator,
Layout,
Left,
LinkedList,
LintPass,
None,
Ok,
@ -191,6 +195,7 @@ symbols! {
RangeToInclusive,
Rc,
Ready,
Receiver,
Result,
Return,
Right,
@ -592,6 +597,8 @@ symbols! {
gt,
half_open_range_patterns,
hash,
hashmap_type,
hashset_type,
hexagon_target_feature,
hidden,
homogeneous_aggregate,
@ -1256,6 +1263,7 @@ symbols! {
variant_count,
vec,
vec_type,
vecdeque_type,
version,
vis,
visible_private_types,

1
library/alloc/src/collections/binary_heap.rs
View File

@ -247,6 +247,7 @@ use super::SpecExtend;
/// [peek]: BinaryHeap::peek
/// [peek\_mut]: BinaryHeap::peek_mut
#[stable(feature = "rust1", since = "1.0.0")]
#[cfg_attr(not(test), rustc_diagnostic_item = "BinaryHeap")]
pub struct BinaryHeap<T> {
data: Vec<T>,
}

1
library/alloc/src/collections/btree/map.rs
View File

@ -138,6 +138,7 @@ pub(super) const MIN_LEN: usize = node::MIN_LEN_AFTER_SPLIT;
/// *stat += random_stat_buff();
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[cfg_attr(not(test), rustc_diagnostic_item = "BTreeMap")]
pub struct BTreeMap<K, V> {
root: Option<Root<K, V>>,
length: usize,

1
library/alloc/src/collections/btree/set.rs
View File

@ -61,6 +61,7 @@ use super::Recover;
/// ```
#[derive(Hash, PartialEq, Eq, Ord, PartialOrd)]
#[stable(feature = "rust1", since = "1.0.0")]
#[cfg_attr(not(test), rustc_diagnostic_item = "BTreeSet")]
pub struct BTreeSet<T> {
map: BTreeMap<T, ()>,
}

1
library/alloc/src/collections/linked_list.rs
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@ -35,6 +35,7 @@ mod tests;
/// array-based containers are generally faster,
/// more memory efficient, and make better use of CPU cache.
#[stable(feature = "rust1", since = "1.0.0")]
#[cfg_attr(not(test), rustc_diagnostic_item = "LinkedList")]
pub struct LinkedList<T> {
head: Option<NonNull<Node<T>>>,
tail: Option<NonNull<Node<T>>>,

1
library/std/src/sync/mpsc/mod.rs
View File

@ -310,6 +310,7 @@ mod cache_aligned;
/// println!("{}", recv.recv().unwrap()); // Received after 2 seconds
/// ```
#[stable(feature = "rust1", since = "1.0.0")]
#[cfg_attr(not(test), rustc_diagnostic_item = "Receiver")]
pub struct Receiver<T> {
inner: UnsafeCell<Flavor<T>>,
}

3
src/tools/clippy/clippy_lints/src/entry.rs
View File

@ -9,6 +9,7 @@ use rustc_lint::{LateContext, LateLintPass};
use rustc_middle::hir::map::Map;
use rustc_session::{declare_lint_pass, declare_tool_lint};
use rustc_span::source_map::Span;
use rustc_span::sym;
declare_clippy_lint! {
/// **What it does:** Checks for uses of `contains_key` + `insert` on `HashMap`
@ -111,7 +112,7 @@ fn check_cond<'a>(cx: &LateContext<'_>, check: &'a Expr<'a>) -> Option<(&'static
return if match_type(cx, obj_ty, &paths::BTREEMAP) {
Some(("BTreeMap", map, key))
}
else if is_type_diagnostic_item(cx, obj_ty, sym!(hashmap_type)) {
else if is_type_diagnostic_item(cx, obj_ty, sym::hashmap_type) {
Some(("HashMap", map, key))
}
else {

16
src/tools/clippy/clippy_lints/src/loops.rs
View File

@ -1010,7 +1010,7 @@ fn is_slice_like<'tcx>(cx: &LateContext<'tcx>, ty: Ty<'_>) -> bool {
_ => false,
};
is_slice || is_type_diagnostic_item(cx, ty, sym::vec_type) || is_type_diagnostic_item(cx, ty, sym!(vecdeque_type))
is_slice || is_type_diagnostic_item(cx, ty, sym::vec_type) || is_type_diagnostic_item(cx, ty, sym::vecdeque_type)
}
fn fetch_cloned_expr<'tcx>(expr: &'tcx Expr<'tcx>) -> &'tcx Expr<'tcx> {
@ -1908,7 +1908,7 @@ fn check_for_loop_over_map_kv<'tcx>(
_ => arg,
};
if is_type_diagnostic_item(cx, ty, sym!(hashmap_type)) || match_type(cx, ty, &paths::BTREEMAP) {
if is_type_diagnostic_item(cx, ty, sym::hashmap_type) || match_type(cx, ty, &paths::BTREEMAP) {
span_lint_and_then(
cx,
FOR_KV_MAP,
@ -2386,9 +2386,9 @@ fn is_ref_iterable_type(cx: &LateContext<'_>, e: &Expr<'_>) -> bool {
is_iterable_array(ty, cx) ||
is_type_diagnostic_item(cx, ty, sym::vec_type) ||
match_type(cx, ty, &paths::LINKED_LIST) ||
is_type_diagnostic_item(cx, ty, sym!(hashmap_type)) ||
is_type_diagnostic_item(cx, ty, sym!(hashset_type)) ||
is_type_diagnostic_item(cx, ty, sym!(vecdeque_type)) ||
is_type_diagnostic_item(cx, ty, sym::hashmap_type) ||
is_type_diagnostic_item(cx, ty, sym::hashset_type) ||
is_type_diagnostic_item(cx, ty, sym::vecdeque_type) ||
match_type(cx, ty, &paths::BINARY_HEAP) ||
match_type(cx, ty, &paths::BTREEMAP) ||
match_type(cx, ty, &paths::BTREESET)
@ -2922,9 +2922,9 @@ fn check_needless_collect_direct_usage<'tcx>(expr: &'tcx Expr<'_>, cx: &LateCont
then {
let ty = cx.typeck_results().node_type(ty.hir_id);
if is_type_diagnostic_item(cx, ty, sym::vec_type) ||
is_type_diagnostic_item(cx, ty, sym!(vecdeque_type)) ||
is_type_diagnostic_item(cx, ty, sym::vecdeque_type) ||
match_type(cx, ty, &paths::BTREEMAP) ||
is_type_diagnostic_item(cx, ty, sym!(hashmap_type)) {
is_type_diagnostic_item(cx, ty, sym::hashmap_type) {
if method.ident.name == sym!(len) {
let span = shorten_needless_collect_span(expr);
span_lint_and_sugg(
@ -2992,7 +2992,7 @@ fn check_needless_collect_indirect_usage<'tcx>(expr: &'tcx Expr<'_>, cx: &LateCo
if let Some(GenericArg::Type(ref ty)) = generic_args.args.get(0);
if let ty = cx.typeck_results().node_type(ty.hir_id);
if is_type_diagnostic_item(cx, ty, sym::vec_type) ||
is_type_diagnostic_item(cx, ty, sym!(vecdeque_type)) ||
is_type_diagnostic_item(cx, ty, sym::vecdeque_type) ||
match_type(cx, ty, &paths::LINKED_LIST);
if let Some(iter_calls) = detect_iter_and_into_iters(block, *ident);
if iter_calls.len() == 1;

10
src/tools/clippy/clippy_lints/src/methods/mod.rs
View File

@ -24,7 +24,7 @@ use rustc_middle::ty::{self, TraitRef, Ty, TyS};
use rustc_semver::RustcVersion;
use rustc_session::{declare_tool_lint, impl_lint_pass};
use rustc_span::source_map::Span;
use rustc_span::symbol::{sym, SymbolStr};
use rustc_span::symbol::{sym, Symbol, SymbolStr};
use rustc_typeck::hir_ty_to_ty;
use crate::consts::{constant, Constant};
@ -2598,7 +2598,7 @@ fn lint_iter_nth<'tcx>(
"slice"
} else if is_type_diagnostic_item(cx, cx.typeck_results().expr_ty(&iter_args[0]), sym::vec_type) {
"Vec"
} else if is_type_diagnostic_item(cx, cx.typeck_results().expr_ty(&iter_args[0]), sym!(vecdeque_type)) {
} else if is_type_diagnostic_item(cx, cx.typeck_results().expr_ty(&iter_args[0]), sym::vecdeque_type) {
"VecDeque"
} else {
let nth_args = nth_and_iter_args[0];
@ -2652,10 +2652,10 @@ fn lint_get_unwrap<'tcx>(cx: &LateContext<'tcx>, expr: &hir::Expr<'_>, get_args:
} else if is_type_diagnostic_item(cx, expr_ty, sym::vec_type) {
needs_ref = get_args_str.parse::<usize>().is_ok();
"Vec"
} else if is_type_diagnostic_item(cx, expr_ty, sym!(vecdeque_type)) {
} else if is_type_diagnostic_item(cx, expr_ty, sym::vecdeque_type) {
needs_ref = get_args_str.parse::<usize>().is_ok();
"VecDeque"
} else if !is_mut && is_type_diagnostic_item(cx, expr_ty, sym!(hashmap_type)) {
} else if !is_mut && is_type_diagnostic_item(cx, expr_ty, sym::hashmap_type) {
needs_ref = true;
"HashMap"
} else if !is_mut && match_type(cx, expr_ty, &paths::BTREEMAP) {
@ -3619,7 +3619,7 @@ fn lint_asref(cx: &LateContext<'_>, expr: &hir::Expr<'_>, call_name: &str, as_re
}
}
fn ty_has_iter_method(cx: &LateContext<'_>, self_ref_ty: Ty<'_>) -> Option<(&'static str, &'static str)> {
fn ty_has_iter_method(cx: &LateContext<'_>, self_ref_ty: Ty<'_>) -> Option<(Symbol, &'static str)> {
has_iter_method(cx, self_ref_ty).map(|ty_name| {
let mutbl = match self_ref_ty.kind() {
ty::Ref(_, _, mutbl) => mutbl,

2
src/tools/clippy/clippy_lints/src/swap.rs
View File

@ -199,7 +199,7 @@ fn check_for_slice<'a>(cx: &LateContext<'_>, lhs1: &'a Expr<'_>, lhs2: &'a Expr<
if matches!(ty.kind(), ty::Slice(_))
|| matches!(ty.kind(), ty::Array(_, _))
|| is_type_diagnostic_item(cx, ty, sym::vec_type)
|| is_type_diagnostic_item(cx, ty, sym!(vecdeque_type))
|| is_type_diagnostic_item(cx, ty, sym::vecdeque_type)
{
return Slice::Swappable(lhs1, idx1, idx2);
}

4
src/tools/clippy/clippy_lints/src/types.rs
View File

@ -2680,14 +2680,14 @@ impl<'tcx> ImplicitHasherType<'tcx> {
let ty = hir_ty_to_ty(cx.tcx, hir_ty);
if is_type_diagnostic_item(cx, ty, sym!(hashmap_type)) && params_len == 2 {
if is_type_diagnostic_item(cx, ty, sym::hashmap_type) && params_len == 2 {
Some(ImplicitHasherType::HashMap(
hir_ty.span,
ty,
snippet(cx, params[0].span, "K"),
snippet(cx, params[1].span, "V"),
))
} else if is_type_diagnostic_item(cx, ty, sym!(hashset_type)) && params_len == 1 {
} else if is_type_diagnostic_item(cx, ty, sym::hashset_type) && params_len == 1 {
Some(ImplicitHasherType::HashSet(
hir_ty.span,
ty,

3
src/tools/clippy/clippy_lints/src/zero_sized_map_values.rs
View File

@ -5,6 +5,7 @@ use rustc_middle::ty::{Adt, Ty};
use rustc_session::{declare_lint_pass, declare_tool_lint};
use rustc_target::abi::LayoutOf as _;
use rustc_typeck::hir_ty_to_ty;
use rustc_span::sym;
use crate::utils::{is_normalizable, is_type_diagnostic_item, match_type, paths, span_lint_and_help};
@ -47,7 +48,7 @@ impl LateLintPass<'_> for ZeroSizedMapValues {
if !hir_ty.span.from_expansion();
if !in_trait_impl(cx, hir_ty.hir_id);
let ty = ty_from_hir_ty(cx, hir_ty);
if is_type_diagnostic_item(cx, ty, sym!(hashmap_type)) || match_type(cx, ty, &paths::BTREEMAP);
if is_type_diagnostic_item(cx, ty, sym::hashmap_type) || match_type(cx, ty, &paths::BTREEMAP);
if let Adt(_, ref substs) = ty.kind();
let ty = substs.type_at(1);
// Do this to prevent `layout_of` crashing, being unable to fully normalize `ty`.

3
src/tools/clippy/clippy_utils/src/eager_or_lazy.rs
View File

@ -18,6 +18,7 @@ use rustc_hir::intravisit::{NestedVisitorMap, Visitor};
use rustc_hir::{Block, Expr, ExprKind, Path, QPath};
use rustc_lint::LateContext;
use rustc_middle::hir::map::Map;
use rustc_span::sym;
/// Is the expr pure (is it free from side-effects)?
/// This function is named so to stress that it isn't exhaustive and returns FNs.
@ -99,7 +100,7 @@ fn identify_some_potentially_expensive_patterns<'tcx>(cx: &LateContext<'tcx>, ex
ExprKind::Call(..) => !is_ctor_or_promotable_const_function(self.cx, expr),
ExprKind::Index(obj, _) => {
let ty = self.cx.typeck_results().expr_ty(obj);
is_type_diagnostic_item(self.cx, ty, sym!(hashmap_type))
is_type_diagnostic_item(self.cx, ty, sym::hashmap_type)
|| match_type(self.cx, ty, &paths::BTREEMAP)
},
ExprKind::MethodCall(..) => true,

40
src/tools/clippy/clippy_utils/src/lib.rs
View File

@ -1295,24 +1295,24 @@ pub fn any_parent_is_automatically_derived(tcx: TyCtxt<'_>, node: HirId) -> bool
}
/// Returns true if ty has `iter` or `iter_mut` methods
pub fn has_iter_method(cx: &LateContext<'_>, probably_ref_ty: Ty<'_>) -> Option<&'static str> {
pub fn has_iter_method(cx: &LateContext<'_>, probably_ref_ty: Ty<'_>) -> Option<Symbol> {
// FIXME: instead of this hard-coded list, we should check if `<adt>::iter`
// exists and has the desired signature. Unfortunately FnCtxt is not exported
// so we can't use its `lookup_method` method.
let into_iter_collections: [&[&str]; 13] = [
&paths::VEC,
&paths::OPTION,
&paths::RESULT,
&paths::BTREESET,
&paths::BTREEMAP,
&paths::VEC_DEQUE,
&paths::LINKED_LIST,
&paths::BINARY_HEAP,
&paths::HASHSET,
&paths::HASHMAP,
&paths::PATH_BUF,
&paths::PATH,
&paths::RECEIVER,
let into_iter_collections: &[Symbol] = &[
sym::vec_type,
sym::option_type,
sym::result_type,
sym::BTreeMap,
sym::BTreeSet,
sym::vecdeque_type,
sym::LinkedList,
sym::BinaryHeap,
sym::hashset_type,
sym::hashmap_type,
sym::PathBuf,
sym::Path,
sym::Receiver,
];
let ty_to_check = match probably_ref_ty.kind() {
@ -1321,15 +1321,15 @@ pub fn has_iter_method(cx: &LateContext<'_>, probably_ref_ty: Ty<'_>) -> Option<
};
let def_id = match ty_to_check.kind() {
ty::Array(..) => return Some("array"),
ty::Slice(..) => return Some("slice"),
ty::Array(..) => return Some(sym::array),
ty::Slice(..) => return Some(sym::slice),
ty::Adt(adt, _) => adt.did,
_ => return None,
};
for path in &into_iter_collections {
if match_def_path(cx, def_id, path) {
return Some(*path.last().unwrap());
for &name in into_iter_collections {
if cx.tcx.is_diagnostic_item(name, def_id) {
return Some(cx.tcx.item_name(def_id));
}
}
None

2
src/tools/clippy/clippy_utils/src/paths.rs
View File

@ -99,7 +99,6 @@ pub(super) const PANIC_ANY: [&str; 3] = ["std", "panic", "panic_any"];
pub const PARKING_LOT_MUTEX_GUARD: [&str; 2] = ["parking_lot", "MutexGuard"];
pub const PARKING_LOT_RWLOCK_READ_GUARD: [&str; 2] = ["parking_lot", "RwLockReadGuard"];
pub const PARKING_LOT_RWLOCK_WRITE_GUARD: [&str; 2] = ["parking_lot", "RwLockWriteGuard"];
pub const PATH: [&str; 3] = ["std", "path", "Path"];
pub const PATH_BUF: [&str; 3] = ["std", "path", "PathBuf"];
pub const PATH_BUF_AS_PATH: [&str; 4] = ["std", "path", "PathBuf", "as_path"];
pub const PATH_TO_PATH_BUF: [&str; 4] = ["std", "path", "Path", "to_path_buf"];
@ -116,7 +115,6 @@ pub const PUSH_STR: [&str; 4] = ["alloc", "string", "String", "push_str"];
pub const RANGE_ARGUMENT_TRAIT: [&str; 3] = ["core", "ops", "RangeBounds"];
pub const RC: [&str; 3] = ["alloc", "rc", "Rc"];
pub const RC_PTR_EQ: [&str; 4] = ["alloc", "rc", "Rc", "ptr_eq"];
pub const RECEIVER: [&str; 4] = ["std", "sync", "mpsc", "Receiver"];
pub const REFCELL_REF: [&str; 3] = ["core", "cell", "Ref"];
pub const REFCELL_REFMUT: [&str; 3] = ["core", "cell", "RefMut"];
pub const REGEX_BUILDER_NEW: [&str; 5] = ["regex", "re_builder", "unicode", "RegexBuilder", "new"];