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Merge branch 'rust-lang:master' into clear-with-drain

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3
.cargo/config.toml
View file

@ -11,3 +11,6 @@ target-dir = "target"
[unstable]
binary-dep-depinfo = true
[profile.dev]
split-debuginfo = "unpacked"

2
.github/workflows/clippy_bors.yml vendored
View file

@ -180,6 +180,8 @@ jobs:
# Run
- name: Build Integration Test
env:
CARGO_PROFILE_DEV_SPLIT_DEBUGINFO: off
run: cargo test --test integration --features integration --no-run
# Upload

1
CHANGELOG.md
View file

@ -4988,6 +4988,7 @@ Released 2018-09-13
[`unnecessary_safety_doc`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_safety_doc
[`unnecessary_self_imports`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_self_imports
[`unnecessary_sort_by`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_sort_by
[`unnecessary_struct_initialization`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_struct_initialization
[`unnecessary_to_owned`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_to_owned
[`unnecessary_unwrap`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_unwrap
[`unnecessary_wraps`]: https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_wraps

4
COPYRIGHT
View file

@ -1,3 +1,5 @@
// REUSE-IgnoreStart
Copyright 2014-2022 The Rust Project Developers
Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
@ -5,3 +7,5 @@ http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
<LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
option. All files in the project carrying such notice may not be
copied, modified, or distributed except according to those terms.
// REUSE-IgnoreEnd

4
README.md
View file

@ -275,6 +275,8 @@ If you want to contribute to Clippy, you can find more information in [CONTRIBUT
## License
<!-- REUSE-IgnoreStart -->
Copyright 2014-2022 The Rust Project Developers
Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
@ -282,3 +284,5 @@ Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
<LICENSE-MIT or [https://opensource.org/licenses/MIT](https://opensource.org/licenses/MIT)>, at your
option. Files in the project may not be
copied, modified, or distributed except according to those terms.
<!-- REUSE-IgnoreEnd -->

10
book/src/development/adding_lints.md
View file

@ -18,6 +18,7 @@ because that's clearly a non-descriptive name.
- [Cargo lints](#cargo-lints)
- [Rustfix tests](#rustfix-tests)
- [Testing manually](#testing-manually)
- [Running directly](#running-directly)
- [Lint declaration](#lint-declaration)
- [Lint registration](#lint-registration)
- [Lint passes](#lint-passes)
@ -186,6 +187,15 @@ cargo dev lint input.rs
from the working copy root. With tests in place, let's have a look at
implementing our lint now.
## Running directly
While it's easier to just use `cargo dev lint`, it might be desirable to get
`target/release/cargo-clippy` and `target/release/clippy-driver` to work as well in some cases.
By default, they don't work because clippy dynamically links rustc. To help them find rustc,
add the path printed by`rustc --print target-libdir` (ran inside this workspace so that the rustc version matches)
to your library search path.
On linux, this can be done by setting the `LD_LIBRARY_PATH` environment variable to that path.
## Lint declaration
Let's start by opening the new file created in the `clippy_lints` crate at

7
clippy_lints/src/booleans.rs
View file

@ -495,8 +495,10 @@ struct NotSimplificationVisitor<'a, 'tcx> {
impl<'a, 'tcx> Visitor<'tcx> for NotSimplificationVisitor<'a, 'tcx> {
fn visit_expr(&mut self, expr: &'tcx Expr<'_>) {
if let ExprKind::Unary(UnOp::Not, inner) = &expr.kind {
if let Some(suggestion) = simplify_not(self.cx, inner) {
if let ExprKind::Unary(UnOp::Not, inner) = &expr.kind &&
!inner.span.from_expansion() &&
let Some(suggestion) = simplify_not(self.cx, inner)
{
span_lint_and_sugg(
self.cx,
NONMINIMAL_BOOL,
@ -507,7 +509,6 @@ impl<'a, 'tcx> Visitor<'tcx> for NotSimplificationVisitor<'a, 'tcx> {
Applicability::MachineApplicable,
);
}
}
walk_expr(self, expr);
}

28
clippy_lints/src/casts/cast_possible_truncation.rs
View file

@ -2,8 +2,9 @@ use clippy_utils::consts::{constant, Constant};
use clippy_utils::diagnostics::{span_lint, span_lint_and_then};
use clippy_utils::expr_or_init;
use clippy_utils::source::snippet;
use clippy_utils::sugg::Sugg;
use clippy_utils::ty::{get_discriminant_value, is_isize_or_usize};
use rustc_errors::{Applicability, SuggestionStyle};
use rustc_errors::{Applicability, Diagnostic, SuggestionStyle};
use rustc_hir::def::{DefKind, Res};
use rustc_hir::{BinOpKind, Expr, ExprKind};
use rustc_lint::LateContext;
@ -163,12 +164,28 @@ pub(super) fn check(
_ => return,
};
let name_of_cast_from = snippet(cx, cast_expr.span, "..");
let cast_to_snip = snippet(cx, cast_to_span, "..");
let suggestion = format!("{cast_to_snip}::try_from({name_of_cast_from})");
span_lint_and_then(cx, CAST_POSSIBLE_TRUNCATION, expr.span, &msg, |diag| {
diag.help("if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...");
if !cast_from.is_floating_point() {
offer_suggestion(cx, expr, cast_expr, cast_to_span, diag);
}
});
}
fn offer_suggestion(
cx: &LateContext<'_>,
expr: &Expr<'_>,
cast_expr: &Expr<'_>,
cast_to_span: Span,
diag: &mut Diagnostic,
) {
let cast_to_snip = snippet(cx, cast_to_span, "..");
let suggestion = if cast_to_snip == "_" {
format!("{}.try_into()", Sugg::hir(cx, cast_expr, "..").maybe_par())
} else {
format!("{cast_to_snip}::try_from({})", Sugg::hir(cx, cast_expr, ".."))
};
diag.span_suggestion_with_style(
expr.span,
"... or use `try_from` and handle the error accordingly",
@ -177,5 +194,4 @@ pub(super) fn check(
// always show the suggestion in a separate line
SuggestionStyle::ShowAlways,
);
});
}

2
clippy_lints/src/cognitive_complexity.rs
View file

@ -143,7 +143,7 @@ impl<'tcx> LateLintPass<'tcx> for CognitiveComplexity {
span: Span,
def_id: LocalDefId,
) {
if !cx.tcx.has_attr(def_id.to_def_id(), sym::test) {
if !cx.tcx.has_attr(def_id, sym::test) {
let expr = if is_async_fn(kind) {
match get_async_fn_body(cx.tcx, body) {
Some(b) => b,

1
clippy_lints/src/declared_lints.rs
View file

@ -619,6 +619,7 @@ pub(crate) static LINTS: &[&crate::LintInfo] = &[
crate::unnamed_address::VTABLE_ADDRESS_COMPARISONS_INFO,
crate::unnecessary_owned_empty_strings::UNNECESSARY_OWNED_EMPTY_STRINGS_INFO,
crate::unnecessary_self_imports::UNNECESSARY_SELF_IMPORTS_INFO,
crate::unnecessary_struct_initialization::UNNECESSARY_STRUCT_INITIALIZATION_INFO,
crate::unnecessary_wraps::UNNECESSARY_WRAPS_INFO,
crate::unnested_or_patterns::UNNESTED_OR_PATTERNS_INFO,
crate::unsafe_removed_from_name::UNSAFE_REMOVED_FROM_NAME_INFO,

2
clippy_lints/src/derivable_impls.rs
View file

@ -181,7 +181,7 @@ impl<'tcx> LateLintPass<'tcx> for DerivableImpls {
self_ty,
..
}) = item.kind;
if !cx.tcx.has_attr(item.owner_id.to_def_id(), sym::automatically_derived);
if !cx.tcx.has_attr(item.owner_id, sym::automatically_derived);
if !item.span.from_expansion();
if let Some(def_id) = trait_ref.trait_def_id();
if cx.tcx.is_diagnostic_item(sym::Default, def_id);

2
clippy_lints/src/derive.rs
View file

@ -212,7 +212,7 @@ impl<'tcx> LateLintPass<'tcx> for Derive {
}) = item.kind
{
let ty = cx.tcx.type_of(item.owner_id).subst_identity();
let is_automatically_derived = cx.tcx.has_attr(item.owner_id.to_def_id(), sym::automatically_derived);
let is_automatically_derived = cx.tcx.has_attr(item.owner_id, sym::automatically_derived);
check_hash_peq(cx, item.span, trait_ref, ty, is_automatically_derived);
check_ord_partial_ord(cx, item.span, trait_ref, ty, is_automatically_derived);

2
clippy_lints/src/disallowed_script_idents.rs
View file

@ -32,7 +32,7 @@ declare_clippy_lint! {
/// ### Example
/// ```rust
/// // Assuming that `clippy.toml` contains the following line:
/// // allowed-locales = ["Latin", "Cyrillic"]
/// // allowed-scripts = ["Latin", "Cyrillic"]
/// let counter = 10; // OK, latin is allowed.
/// let счётчик = 10; // OK, cyrillic is allowed.
/// let zähler = 10; // OK, it's still latin.

15
clippy_lints/src/functions/must_use.rs
View file

@ -22,13 +22,13 @@ use super::{DOUBLE_MUST_USE, MUST_USE_CANDIDATE, MUST_USE_UNIT};
pub(super) fn check_item<'tcx>(cx: &LateContext<'tcx>, item: &'tcx hir::Item<'_>) {
let attrs = cx.tcx.hir().attrs(item.hir_id());
let attr = cx.tcx.get_attr(item.owner_id.to_def_id(), sym::must_use);
let attr = cx.tcx.get_attr(item.owner_id, sym::must_use);
if let hir::ItemKind::Fn(ref sig, _generics, ref body_id) = item.kind {
let is_public = cx.effective_visibilities.is_exported(item.owner_id.def_id);
let fn_header_span = item.span.with_hi(sig.decl.output.span().hi());
if let Some(attr) = attr {
check_needless_must_use(cx, sig.decl, item.owner_id, item.span, fn_header_span, attr);
} else if is_public && !is_proc_macro(cx.sess(), attrs) && !attrs.iter().any(|a| a.has_name(sym::no_mangle)) {
} else if is_public && !is_proc_macro(attrs) && !attrs.iter().any(|a| a.has_name(sym::no_mangle)) {
check_must_use_candidate(
cx,
sig.decl,
@ -47,13 +47,10 @@ pub(super) fn check_impl_item<'tcx>(cx: &LateContext<'tcx>, item: &'tcx hir::Imp
let is_public = cx.effective_visibilities.is_exported(item.owner_id.def_id);
let fn_header_span = item.span.with_hi(sig.decl.output.span().hi());
let attrs = cx.tcx.hir().attrs(item.hir_id());
let attr = cx.tcx.get_attr(item.owner_id.to_def_id(), sym::must_use);
let attr = cx.tcx.get_attr(item.owner_id, sym::must_use);
if let Some(attr) = attr {
check_needless_must_use(cx, sig.decl, item.owner_id, item.span, fn_header_span, attr);
} else if is_public
&& !is_proc_macro(cx.sess(), attrs)
&& trait_ref_of_method(cx, item.owner_id.def_id).is_none()
{
} else if is_public && !is_proc_macro(attrs) && trait_ref_of_method(cx, item.owner_id.def_id).is_none() {
check_must_use_candidate(
cx,
sig.decl,
@ -73,12 +70,12 @@ pub(super) fn check_trait_item<'tcx>(cx: &LateContext<'tcx>, item: &'tcx hir::Tr
let fn_header_span = item.span.with_hi(sig.decl.output.span().hi());
let attrs = cx.tcx.hir().attrs(item.hir_id());
let attr = cx.tcx.get_attr(item.owner_id.to_def_id(), sym::must_use);
let attr = cx.tcx.get_attr(item.owner_id, sym::must_use);
if let Some(attr) = attr {
check_needless_must_use(cx, sig.decl, item.owner_id, item.span, fn_header_span, attr);
} else if let hir::TraitFn::Provided(eid) = *eid {
let body = cx.tcx.hir().body(eid);
if attr.is_none() && is_public && !is_proc_macro(cx.sess(), attrs) {
if attr.is_none() && is_public && !is_proc_macro(attrs) {
check_must_use_candidate(
cx,
sig.decl,

6
clippy_lints/src/future_not_send.rs
View file

@ -9,7 +9,7 @@ use rustc_session::{declare_lint_pass, declare_tool_lint};
use rustc_span::def_id::LocalDefId;
use rustc_span::{sym, Span};
use rustc_trait_selection::traits::error_reporting::suggestions::TypeErrCtxtExt;
use rustc_trait_selection::traits::{self, FulfillmentError};
use rustc_trait_selection::traits::{self, FulfillmentError, ObligationCtxt};
declare_clippy_lint! {
/// ### What it does
@ -79,8 +79,10 @@ impl<'tcx> LateLintPass<'tcx> for FutureNotSend {
let send_trait = cx.tcx.get_diagnostic_item(sym::Send).unwrap();
let span = decl.output.span();
let infcx = cx.tcx.infer_ctxt().build();
let ocx = ObligationCtxt::new(&infcx);
let cause = traits::ObligationCause::misc(span, fn_def_id);
let send_errors = traits::fully_solve_bound(&infcx, cause, cx.param_env, ret_ty, send_trait);
ocx.register_bound(cause, cx.param_env, ret_ty, send_trait);
let send_errors = ocx.select_all_or_error();
if !send_errors.is_empty() {
span_lint_and_then(
cx,

2
clippy_lints/src/infinite_iter.rs
View file

@ -167,7 +167,7 @@ fn is_infinite(cx: &LateContext<'_>, expr: &Expr<'_>) -> Finiteness {
Finite
},
ExprKind::Block(block, _) => block.expr.as_ref().map_or(Finite, |e| is_infinite(cx, e)),
ExprKind::Box(e) | ExprKind::AddrOf(BorrowKind::Ref, _, e) => is_infinite(cx, e),
ExprKind::AddrOf(BorrowKind::Ref, _, e) => is_infinite(cx, e),
ExprKind::Call(path, _) => {
if let ExprKind::Path(ref qpath) = path.kind {
cx.qpath_res(qpath, path.hir_id)

2
clippy_lints/src/lib.rs
View file

@ -302,6 +302,7 @@ mod unit_types;
mod unnamed_address;
mod unnecessary_owned_empty_strings;
mod unnecessary_self_imports;
mod unnecessary_struct_initialization;
mod unnecessary_wraps;
mod unnested_or_patterns;
mod unsafe_removed_from_name;
@ -938,6 +939,7 @@ pub fn register_plugins(store: &mut rustc_lint::LintStore, sess: &Session, conf:
store.register_late_pass(|_| Box::new(let_with_type_underscore::UnderscoreTyped));
store.register_late_pass(|_| Box::new(allow_attributes::AllowAttribute));
store.register_late_pass(move |_| Box::new(manual_main_separator_str::ManualMainSeparatorStr::new(msrv())));
store.register_late_pass(|_| Box::new(unnecessary_struct_initialization::UnnecessaryStruct));
// add lints here, do not remove this comment, it's used in `new_lint`
}

3
clippy_lints/src/loops/never_loop.rs
View file

@ -124,8 +124,7 @@ fn stmt_to_expr<'tcx>(stmt: &Stmt<'tcx>) -> Option<(&'tcx Expr<'tcx>, Option<&'t
#[allow(clippy::too_many_lines)]
fn never_loop_expr(expr: &Expr<'_>, ignore_ids: &mut Vec<HirId>, main_loop_id: HirId) -> NeverLoopResult {
match expr.kind {
ExprKind::Box(e)
| ExprKind::Unary(_, e)
ExprKind::Unary(_, e)
| ExprKind::Cast(e, _)
| ExprKind::Type(e, _)
| ExprKind::Field(e, _)

9
clippy_lints/src/manual_async_fn.rs
View file

@ -1,5 +1,4 @@
use clippy_utils::diagnostics::span_lint_and_then;
use clippy_utils::match_function_call_with_def_id;
use clippy_utils::source::{position_before_rarrow, snippet_block, snippet_opt};
use if_chain::if_chain;
use rustc_errors::Applicability;
@ -184,16 +183,10 @@ fn captures_all_lifetimes(inputs: &[Ty<'_>], output_lifetimes: &[LifetimeName])
fn desugared_async_block<'tcx>(cx: &LateContext<'tcx>, block: &'tcx Block<'tcx>) -> Option<&'tcx Body<'tcx>> {
if_chain! {
if let Some(block_expr) = block.expr;
if let Some(args) = cx
.tcx
.lang_items()
.identity_future_fn()
.and_then(|def_id| match_function_call_with_def_id(cx, block_expr, def_id));
if args.len() == 1;
if let Expr {
kind: ExprKind::Closure(&Closure { body, .. }),
..
} = args[0];
} = block_expr;
let closure_body = cx.tcx.hir().body(body);
if closure_body.generator_kind == Some(GeneratorKind::Async(AsyncGeneratorKind::Block));
then {

1
clippy_lints/src/matches/significant_drop_in_scrutinee.rs
View file

@ -321,7 +321,6 @@ impl<'a, 'tcx> Visitor<'tcx> for SigDropHelper<'a, 'tcx> {
self.has_significant_drop = true;
}
}
ExprKind::Box(..) |
ExprKind::Array(..) |
ExprKind::Call(..) |
ExprKind::Unary(..) |

4
clippy_lints/src/methods/unnecessary_sort_by.rs
View file

@ -33,10 +33,6 @@ struct SortByKeyDetection {
/// contains a and the other replaces it with b)
fn mirrored_exprs(a_expr: &Expr<'_>, a_ident: &Ident, b_expr: &Expr<'_>, b_ident: &Ident) -> bool {
match (&a_expr.kind, &b_expr.kind) {
// Two boxes with mirrored contents
(ExprKind::Box(left_expr), ExprKind::Box(right_expr)) => {
mirrored_exprs(left_expr, a_ident, right_expr, b_ident)
},
// Two arrays with mirrored contents
(ExprKind::Array(left_exprs), ExprKind::Array(right_exprs)) => {
iter::zip(*left_exprs, *right_exprs).all(|(left, right)| mirrored_exprs(left, a_ident, right, b_ident))

8
clippy_lints/src/methods/unnecessary_to_owned.rs
View file

@ -369,10 +369,10 @@ fn can_change_type<'a>(cx: &LateContext<'a>, mut expr: &'a Expr<'a>, mut ty: Ty<
Node::Item(item) => {
if let ItemKind::Fn(_, _, body_id) = &item.kind
&& let output_ty = return_ty(cx, item.owner_id)
&& Inherited::build(cx.tcx, item.owner_id.def_id).enter(|inherited| {
let fn_ctxt = FnCtxt::new(inherited, cx.param_env, item.owner_id.def_id);
fn_ctxt.can_coerce(ty, output_ty)
}) {
&& let inherited = Inherited::new(cx.tcx, item.owner_id.def_id)
&& let fn_ctxt = FnCtxt::new(&inherited, cx.param_env, item.owner_id.def_id)
&& fn_ctxt.can_coerce(ty, output_ty)
{
if has_lifetime(output_ty) && has_lifetime(ty) {
return false;
}

6
clippy_lints/src/no_effect.rs
View file

@ -127,8 +127,7 @@ fn has_no_effect(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool {
| ExprKind::Type(inner, _)
| ExprKind::Unary(_, inner)
| ExprKind::Field(inner, _)
| ExprKind::AddrOf(_, _, inner)
| ExprKind::Box(inner) => has_no_effect(cx, inner),
| ExprKind::AddrOf(_, _, inner) => has_no_effect(cx, inner),
ExprKind::Struct(_, fields, ref base) => {
!has_drop(cx, cx.typeck_results().expr_ty(expr))
&& fields.iter().all(|field| has_no_effect(cx, field.expr))
@ -234,8 +233,7 @@ fn reduce_expression<'a>(cx: &LateContext<'_>, expr: &'a Expr<'a>) -> Option<Vec
| ExprKind::Type(inner, _)
| ExprKind::Unary(_, inner)
| ExprKind::Field(inner, _)
| ExprKind::AddrOf(_, _, inner)
| ExprKind::Box(inner) => reduce_expression(cx, inner).or_else(|| Some(vec![inner])),
| ExprKind::AddrOf(_, _, inner) => reduce_expression(cx, inner).or_else(|| Some(vec![inner])),
ExprKind::Struct(_, fields, ref base) => {
if has_drop(cx, cx.typeck_results().expr_ty(expr)) {
None

2
clippy_lints/src/partialeq_ne_impl.rs
View file

@ -36,7 +36,7 @@ impl<'tcx> LateLintPass<'tcx> for PartialEqNeImpl {
fn check_item(&mut self, cx: &LateContext<'tcx>, item: &'tcx Item<'_>) {
if_chain! {
if let ItemKind::Impl(Impl { of_trait: Some(ref trait_ref), items: impl_items, .. }) = item.kind;
if !cx.tcx.has_attr(item.owner_id.to_def_id(), sym::automatically_derived);
if !cx.tcx.has_attr(item.owner_id, sym::automatically_derived);
if let Some(eq_trait) = cx.tcx.lang_items().eq_trait();
if trait_ref.path.res.def_id() == eq_trait;
then {

3
clippy_lints/src/shadow.rs
View file

@ -213,8 +213,7 @@ fn is_self_shadow(cx: &LateContext<'_>, pat: &Pat<'_>, mut expr: &Expr<'_>, hir_
}
loop {
expr = match expr.kind {
ExprKind::Box(e)
| ExprKind::AddrOf(_, _, e)
ExprKind::AddrOf(_, _, e)
| ExprKind::Block(
&Block {
stmts: [],

39
clippy_lints/src/significant_drop_tightening.rs
View file

@ -1,9 +1,9 @@
use crate::FxHashSet;
use clippy_utils::{
diagnostics::span_lint_and_then,
get_attr,
source::{indent_of, snippet},
};
use rustc_data_structures::fx::{FxHashMap, FxHashSet};
use rustc_errors::{Applicability, Diagnostic};
use rustc_hir::{
self as hir,
@ -58,6 +58,7 @@ impl_lint_pass!(SignificantDropTightening<'_> => [SIGNIFICANT_DROP_TIGHTENING]);
pub struct SignificantDropTightening<'tcx> {
/// Auxiliary structure used to avoid having to verify the same type multiple times.
seen_types: FxHashSet<Ty<'tcx>>,
type_cache: FxHashMap<Ty<'tcx>, bool>,
}
impl<'tcx> SignificantDropTightening<'tcx> {
@ -118,7 +119,7 @@ impl<'tcx> SignificantDropTightening<'tcx> {
stmt: &hir::Stmt<'_>,
cb: impl Fn(&mut SigDropAuxParams),
) {
let mut sig_drop_finder = SigDropFinder::new(cx, &mut self.seen_types);
let mut sig_drop_finder = SigDropFinder::new(cx, &mut self.seen_types, &mut self.type_cache);
sig_drop_finder.visit_expr(expr);
if sig_drop_finder.has_sig_drop {
cb(sdap);
@ -296,15 +297,24 @@ impl Default for SigDropAuxParams {
struct SigDropChecker<'cx, 'sdt, 'tcx> {
cx: &'cx LateContext<'tcx>,
seen_types: &'sdt mut FxHashSet<Ty<'tcx>>,
type_cache: &'sdt mut FxHashMap<Ty<'tcx>, bool>,
}
impl<'cx, 'sdt, 'tcx> SigDropChecker<'cx, 'sdt, 'tcx> {
pub(crate) fn new(cx: &'cx LateContext<'tcx>, seen_types: &'sdt mut FxHashSet<Ty<'tcx>>) -> Self {
pub(crate) fn new(
cx: &'cx LateContext<'tcx>,
seen_types: &'sdt mut FxHashSet<Ty<'tcx>>,
type_cache: &'sdt mut FxHashMap<Ty<'tcx>, bool>,
) -> Self {
seen_types.clear();
Self { cx, seen_types }
Self {
cx,
seen_types,
type_cache,
}
}
pub(crate) fn has_sig_drop_attr(&mut self, ty: Ty<'tcx>) -> bool {
pub(crate) fn has_sig_drop_attr_uncached(&mut self, ty: Ty<'tcx>) -> bool {
if let Some(adt) = ty.ty_adt_def() {
let mut iter = get_attr(
self.cx.sess(),
@ -340,6 +350,16 @@ impl<'cx, 'sdt, 'tcx> SigDropChecker<'cx, 'sdt, 'tcx> {
}
}
pub(crate) fn has_sig_drop_attr(&mut self, ty: Ty<'tcx>) -> bool {
// The borrow checker prevents us from using something fancier like or_insert_with.
if let Some(ty) = self.type_cache.get(&ty) {
return *ty;
}
let value = self.has_sig_drop_attr_uncached(ty);
self.type_cache.insert(ty, value);
value
}
fn has_seen_ty(&mut self, ty: Ty<'tcx>) -> bool {
!self.seen_types.insert(ty)
}
@ -353,11 +373,15 @@ struct SigDropFinder<'cx, 'sdt, 'tcx> {
}
impl<'cx, 'sdt, 'tcx> SigDropFinder<'cx, 'sdt, 'tcx> {
fn new(cx: &'cx LateContext<'tcx>, seen_types: &'sdt mut FxHashSet<Ty<'tcx>>) -> Self {
fn new(
cx: &'cx LateContext<'tcx>,
seen_types: &'sdt mut FxHashSet<Ty<'tcx>>,
type_cache: &'sdt mut FxHashMap<Ty<'tcx>, bool>,
) -> Self {
Self {
cx,
has_sig_drop: false,
sig_drop_checker: SigDropChecker::new(cx, seen_types),
sig_drop_checker: SigDropChecker::new(cx, seen_types, type_cache),
}
}
}
@ -380,7 +404,6 @@ impl<'cx, 'sdt, 'tcx> Visitor<'tcx> for SigDropFinder<'cx, 'sdt, 'tcx> {
| hir::ExprKind::Assign(..)
| hir::ExprKind::AssignOp(..)
| hir::ExprKind::Binary(..)
| hir::ExprKind::Box(..)
| hir::ExprKind::Call(..)
| hir::ExprKind::Field(..)
| hir::ExprKind::If(..)

3
clippy_lints/src/suspicious_operation_groupings.rs
View file

@ -596,8 +596,7 @@ fn ident_difference_expr_with_base_location(
| (MethodCall(_), MethodCall(_))
| (Call(_, _), Call(_, _))
| (ConstBlock(_), ConstBlock(_))
| (Array(_), Array(_))
| (Box(_), Box(_)) => {
| (Array(_), Array(_)) => {
// keep going
},
_ => {

11
clippy_lints/src/transmute/transmutes_expressible_as_ptr_casts.rs
View file

@ -2,8 +2,9 @@ use super::utils::check_cast;
use super::TRANSMUTES_EXPRESSIBLE_AS_PTR_CASTS;
use clippy_utils::diagnostics::span_lint_and_sugg;
use clippy_utils::sugg::Sugg;
use rustc_ast::ExprPrecedence;
use rustc_errors::Applicability;
use rustc_hir::Expr;
use rustc_hir::{Expr, Node};
use rustc_lint::LateContext;
use rustc_middle::ty::{cast::CastKind, Ty};
@ -19,7 +20,7 @@ pub(super) fn check<'tcx>(
) -> bool {
use CastKind::{AddrPtrCast, ArrayPtrCast, FnPtrAddrCast, FnPtrPtrCast, PtrAddrCast, PtrPtrCast};
let mut app = Applicability::MachineApplicable;
let sugg = match check_cast(cx, e, from_ty, to_ty) {
let mut sugg = match check_cast(cx, e, from_ty, to_ty) {
Some(PtrPtrCast | AddrPtrCast | ArrayPtrCast | FnPtrPtrCast | FnPtrAddrCast) => {
Sugg::hir_with_context(cx, arg, e.span.ctxt(), "..", &mut app)
.as_ty(to_ty.to_string())
@ -39,6 +40,12 @@ pub(super) fn check<'tcx>(
_ => return false,
};
if let Node::Expr(parent) = cx.tcx.hir().get_parent(e.hir_id)
&& parent.precedence().order() > ExprPrecedence::Cast.order()
{
sugg = format!("({sugg})");
}
span_lint_and_sugg(
cx,
TRANSMUTES_EXPRESSIBLE_AS_PTR_CASTS,

5
clippy_lints/src/transmute/utils.rs
View file

@ -33,8 +33,8 @@ pub(super) fn check_cast<'tcx>(
let hir_id = e.hir_id;
let local_def_id = hir_id.owner.def_id;
Inherited::build(cx.tcx, local_def_id).enter(|inherited| {
let fn_ctxt = FnCtxt::new(inherited, cx.param_env, local_def_id);
let inherited = Inherited::new(cx.tcx, local_def_id);
let fn_ctxt = FnCtxt::new(&inherited, cx.param_env, local_def_id);
// If we already have errors, we can't be sure we can pointer cast.
assert!(
@ -66,5 +66,4 @@ pub(super) fn check_cast<'tcx>(
} else {
None
}
})
}

84
clippy_lints/src/unnecessary_struct_initialization.rs Normal file
View file

@ -0,0 +1,84 @@
use clippy_utils::{diagnostics::span_lint_and_sugg, get_parent_expr, path_to_local, source::snippet, ty::is_copy};
use rustc_hir::{BindingAnnotation, Expr, ExprKind, Node, PatKind, UnOp};
use rustc_lint::{LateContext, LateLintPass};
use rustc_session::{declare_lint_pass, declare_tool_lint};
declare_clippy_lint! {
/// ### What it does
/// Checks for initialization of a `struct` by copying a base without setting
/// any field.
///
/// ### Why is this bad?
/// Readibility suffers from unnecessary struct building.
///
/// ### Example
/// ```rust
/// struct S { s: String }
///
/// let a = S { s: String::from("Hello, world!") };
/// let b = S { ..a };
/// ```
/// Use instead:
/// ```rust
/// struct S { s: String }
///
/// let a = S { s: String::from("Hello, world!") };
/// let b = a;
/// ```
#[clippy::version = "1.70.0"]
pub UNNECESSARY_STRUCT_INITIALIZATION,
complexity,
"struct built from a base that can be written mode concisely"
}
declare_lint_pass!(UnnecessaryStruct => [UNNECESSARY_STRUCT_INITIALIZATION]);
impl LateLintPass<'_> for UnnecessaryStruct {
fn check_expr(&mut self, cx: &LateContext<'_>, expr: &Expr<'_>) {
if let ExprKind::Struct(_, &[], Some(base)) = expr.kind {
if let Some(parent) = get_parent_expr(cx, expr) &&
let parent_ty = cx.typeck_results().expr_ty_adjusted(parent) &&
parent_ty.is_any_ptr()
{
if is_copy(cx, cx.typeck_results().expr_ty(expr)) && path_to_local(base).is_some() {
// When the type implements `Copy`, a reference to the new struct works on the
// copy. Using the original would borrow it.
return;
}
if parent_ty.is_mutable_ptr() && !is_mutable(cx, base) {
// The original can be used in a mutable reference context only if it is mutable.
return;
}
}
// TODO: do not propose to replace *XX if XX is not Copy
if let ExprKind::Unary(UnOp::Deref, target) = base.kind &&
matches!(target.kind, ExprKind::Path(..)) &&
!is_copy(cx, cx.typeck_results().expr_ty(expr))
{
// `*base` cannot be used instead of the struct in the general case if it is not Copy.
return;
}
span_lint_and_sugg(
cx,
UNNECESSARY_STRUCT_INITIALIZATION,
expr.span,
"unnecessary struct building",
"replace with",
snippet(cx, base.span, "..").into_owned(),
rustc_errors::Applicability::MachineApplicable,
);
}
}
}
fn is_mutable(cx: &LateContext<'_>, expr: &Expr<'_>) -> bool {
if let Some(hir_id) = path_to_local(expr) &&
let Node::Pat(pat) = cx.tcx.hir().get(hir_id)
{
matches!(pat.kind, PatKind::Binding(BindingAnnotation::MUT, ..))
} else {
true
}
}

5
clippy_lints/src/utils/author.rs
View file

@ -395,11 +395,6 @@ impl<'a, 'tcx> PrintVisitor<'a, 'tcx> {
}
self.expr(field!(let_expr.init));
},
ExprKind::Box(inner) => {
bind!(self, inner);
kind!("Box({inner})");
self.expr(inner);
},
ExprKind::Array(elements) => {
bind!(self, elements);
kind!("Array({elements})");

2
clippy_utils/src/ast_utils.rs
View file

@ -143,7 +143,7 @@ pub fn eq_expr(l: &Expr, r: &Expr) -> bool {
(Paren(l), _) => eq_expr(l, r),
(_, Paren(r)) => eq_expr(l, r),
(Err, Err) => true,
(Box(l), Box(r)) | (Try(l), Try(r)) | (Await(l), Await(r)) => eq_expr(l, r),
(Try(l), Try(r)) | (Await(l), Await(r)) => eq_expr(l, r),
(Array(l), Array(r)) => over(l, r, |l, r| eq_expr(l, r)),
(Tup(l), Tup(r)) => over(l, r, |l, r| eq_expr(l, r)),
(Repeat(le, ls), Repeat(re, rs)) => eq_expr(le, re) && eq_expr(&ls.value, &rs.value),

4
clippy_utils/src/attrs.rs
View file

@ -145,8 +145,8 @@ pub fn get_unique_attr<'a>(
/// Return true if the attributes contain any of `proc_macro`,
/// `proc_macro_derive` or `proc_macro_attribute`, false otherwise
pub fn is_proc_macro(sess: &Session, attrs: &[ast::Attribute]) -> bool {
attrs.iter().any(|attr| sess.is_proc_macro_attr(attr))
pub fn is_proc_macro(attrs: &[ast::Attribute]) -> bool {
attrs.iter().any(rustc_ast::Attribute::is_proc_macro_attr)
}
/// Return true if the attributes contain `#[doc(hidden)]`

1
clippy_utils/src/check_proc_macro.rs
View file

@ -112,7 +112,6 @@ fn qpath_search_pat(path: &QPath<'_>) -> (Pat, Pat) {
/// Get the search patterns to use for the given expression
fn expr_search_pat(tcx: TyCtxt<'_>, e: &Expr<'_>) -> (Pat, Pat) {
match e.kind {
ExprKind::Box(e) => (Pat::Str("box"), expr_search_pat(tcx, e).1),
ExprKind::ConstBlock(_) => (Pat::Str("const"), Pat::Str("}")),
ExprKind::Tup([]) => (Pat::Str(")"), Pat::Str("(")),
ExprKind::Unary(UnOp::Deref, e) => (Pat::Str("*"), expr_search_pat(tcx, e).1),

8
clippy_utils/src/eager_or_lazy.rs
View file

@ -199,11 +199,9 @@ fn expr_eagerness<'tcx>(cx: &LateContext<'tcx>, e: &'tcx Expr<'_>) -> EagernessS
},
// Memory allocation, custom operator, loop, or call to an unknown function
ExprKind::Box(_)
| ExprKind::Unary(..)
| ExprKind::Binary(..)
| ExprKind::Loop(..)
| ExprKind::Call(..) => self.eagerness = Lazy,
ExprKind::Unary(..) | ExprKind::Binary(..) | ExprKind::Loop(..) | ExprKind::Call(..) => {
self.eagerness = Lazy;
},
ExprKind::ConstBlock(_)
| ExprKind::Array(_)

3
clippy_utils/src/hir_utils.rs
View file

@ -249,7 +249,6 @@ impl HirEqInterExpr<'_, '_, '_> {
both(&li.label, &ri.label, |l, r| l.ident.name == r.ident.name)
&& both(le, re, |l, r| self.eq_expr(l, r))
},
(&ExprKind::Box(l), &ExprKind::Box(r)) => self.eq_expr(l, r),
(&ExprKind::Call(l_fun, l_args), &ExprKind::Call(r_fun, r_args)) => {
self.inner.allow_side_effects && self.eq_expr(l_fun, r_fun) && self.eq_exprs(l_args, r_args)
},
@ -628,7 +627,7 @@ impl<'a, 'tcx> SpanlessHash<'a, 'tcx> {
self.hash_expr(j);
}
},
ExprKind::Box(e) | ExprKind::DropTemps(e) | ExprKind::Yield(e, _) => {
ExprKind::DropTemps(e) | ExprKind::Yield(e, _) => {
self.hash_expr(e);
},
ExprKind::Call(fun, args) => {

11
clippy_utils/src/lib.rs
View file

@ -1923,16 +1923,7 @@ pub fn is_async_fn(kind: FnKind<'_>) -> bool {
/// Peels away all the compiler generated code surrounding the body of an async function,
pub fn get_async_fn_body<'tcx>(tcx: TyCtxt<'tcx>, body: &Body<'_>) -> Option<&'tcx Expr<'tcx>> {
if let ExprKind::Call(
_,
&[
Expr {
kind: ExprKind::Closure(&Closure { body, .. }),
..
},
],
) = body.value.kind
{
if let ExprKind::Closure(&Closure { body, .. }) = body.value.kind {
if let ExprKind::Block(
Block {
stmts: [],

21
clippy_utils/src/macros.rs
View file

@ -533,6 +533,14 @@ struct FormatArgsValues<'tcx> {
}
impl<'tcx> FormatArgsValues<'tcx> {
fn new_empty(format_string_span: SpanData) -> Self {
Self {
value_args: Vec::new(),
pos_to_value_index: Vec::new(),
format_string_span,
}
}
fn new(args: &'tcx Expr<'tcx>, format_string_span: SpanData) -> Self {
let mut pos_to_value_index = Vec::new();
let mut value_args = Vec::new();
@ -997,12 +1005,13 @@ impl<'tcx> FormatArgsExpn<'tcx> {
.find(|&name| matches!(name, sym::const_format_args | sym::format_args | sym::format_args_nl))?;
let newline = macro_name == sym::format_args_nl;
// ::core::fmt::Arguments::new_const(pieces)
// ::core::fmt::Arguments::new_v1(pieces, args)
// ::core::fmt::Arguments::new_v1_formatted(pieces, args, fmt, _unsafe_arg)
if let ExprKind::Call(callee, [pieces, args, rest @ ..]) = expr.kind
if let ExprKind::Call(callee, [pieces, rest @ ..]) = expr.kind
&& let ExprKind::Path(QPath::TypeRelative(ty, seg)) = callee.kind
&& let TyKind::Path(QPath::LangItem(LangItem::FormatArguments, _, _)) = ty.kind
&& matches!(seg.ident.as_str(), "new_v1" | "new_v1_formatted")
&& matches!(seg.ident.as_str(), "new_const" | "new_v1" | "new_v1_formatted")
{
let format_string = FormatString::new(cx, pieces)?;
@ -1026,7 +1035,7 @@ impl<'tcx> FormatArgsExpn<'tcx> {
return None;
}
let positions = if let Some(fmt_arg) = rest.first() {
let positions = if let Some(fmt_arg) = rest.get(1) {
// If the argument contains format specs, `new_v1_formatted(_, _, fmt, _)`, parse
// them.
@ -1042,7 +1051,11 @@ impl<'tcx> FormatArgsExpn<'tcx> {
}))
};
let values = FormatArgsValues::new(args, format_string.span.data());
let values = if let Some(args) = rest.first() {
FormatArgsValues::new(args, format_string.span.data())
} else {
FormatArgsValues::new_empty(format_string.span.data())
};
let args = izip!(positions, parsed_args, parser.arg_places)
.map(|(position, parsed_arg, arg_span)| {

7
clippy_utils/src/qualify_min_const_fn.rs
View file

@ -37,7 +37,7 @@ pub fn is_min_const_fn<'tcx>(tcx: TyCtxt<'tcx>, body: &Body<'tcx>, msrv: &Msrv)
| ty::PredicateKind::ConstEvaluatable(..)
| ty::PredicateKind::ConstEquate(..)
| ty::PredicateKind::TypeWellFormedFromEnv(..) => continue,
ty::PredicateKind::AliasEq(..) => panic!("alias eq predicate on function: {predicate:#?}"),
ty::PredicateKind::AliasRelate(..) => panic!("alias relate predicate on function: {predicate:#?}"),
ty::PredicateKind::ObjectSafe(_) => panic!("object safe predicate on function: {predicate:#?}"),
ty::PredicateKind::ClosureKind(..) => panic!("closure kind predicate on function: {predicate:#?}"),
ty::PredicateKind::Subtype(_) => panic!("subtype predicate on function: {predicate:#?}"),
@ -176,6 +176,10 @@ fn check_rvalue<'tcx>(
// FIXME(dyn-star)
unimplemented!()
},
Rvalue::Cast(CastKind::Transmute, _, _) => Err((
span,
"transmute can attempt to turn pointers into integers, so is unstable in const fn".into(),
)),
// binops are fine on integers
Rvalue::BinaryOp(_, box (lhs, rhs)) | Rvalue::CheckedBinaryOp(_, box (lhs, rhs)) => {
check_operand(tcx, lhs, span, body)?;
@ -241,6 +245,7 @@ fn check_statement<'tcx>(
| StatementKind::StorageDead(_)
| StatementKind::Retag { .. }
| StatementKind::AscribeUserType(..)
| StatementKind::PlaceMention(..)
| StatementKind::Coverage(..)
| StatementKind::ConstEvalCounter
| StatementKind::Nop => Ok(()),

2
clippy_utils/src/sugg.rs
View file

@ -125,7 +125,6 @@ impl<'a> Sugg<'a> {
match expr.kind {
hir::ExprKind::AddrOf(..)
| hir::ExprKind::Box(..)
| hir::ExprKind::If(..)
| hir::ExprKind::Let(..)
| hir::ExprKind::Closure { .. }
@ -180,7 +179,6 @@ impl<'a> Sugg<'a> {
match expr.kind {
_ if expr.span.ctxt() != ctxt => Sugg::NonParen(snippet_with_context(cx, expr.span, ctxt, default, app).0),
ast::ExprKind::AddrOf(..)
| ast::ExprKind::Box(..)
| ast::ExprKind::Closure { .. }
| ast::ExprKind::If(..)
| ast::ExprKind::Let(..)

5
clippy_utils/src/visitors.rs
View file

@ -599,10 +599,7 @@ pub fn for_each_unconsumed_temporary<'tcx, B>(
| ExprKind::Let(&Let { init: e, .. }) => {
helper(typeck, false, e, f)?;
},
ExprKind::Block(&Block { expr: Some(e), .. }, _)
| ExprKind::Box(e)
| ExprKind::Cast(e, _)
| ExprKind::Unary(_, e) => {
ExprKind::Block(&Block { expr: Some(e), .. }, _) | ExprKind::Cast(e, _) | ExprKind::Unary(_, e) => {
helper(typeck, true, e, f)?;
},
ExprKind::Call(callee, args) => {

2
rust-toolchain
View file

@ -1,3 +1,3 @@
[toolchain]
channel = "nightly-2023-03-10"
channel = "nightly-2023-03-24"
components = ["cargo", "llvm-tools", "rust-src", "rust-std", "rustc", "rustc-dev", "rustfmt"]

4
rustc_tools_util/README.md
View file

@ -49,6 +49,8 @@ The changelog for `rustc_tools_util` is available under:
## License
<!-- REUSE-IgnoreStart -->
Copyright 2014-2022 The Rust Project Developers
Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
@ -56,3 +58,5 @@ http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
<LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
option. All files in the project carrying such notice may not be
copied, modified, or distributed except according to those terms.
<!-- REUSE-IgnoreEnd -->

1
tests/ui-internal/custom_ice_message.stderr
View file

@ -9,3 +9,4 @@ note: we would appreciate a bug report: https://github.com/rust-lang/rust-clippy
note: Clippy version: foo
thread panicked while panicking. aborting.

6
tests/ui/author/blocks.stdout
View file

@ -43,11 +43,7 @@ if let ExprKind::Block(block, None) = expr.kind
if let ExprKind::Closure(CaptureBy::Value, fn_decl, body_id, _, None) = expr.kind
&& let FnRetTy::DefaultReturn(_) = fn_decl.output
&& expr1 = &cx.tcx.hir().body(body_id).value
&& let ExprKind::Call(func, args) = expr1.kind
&& let ExprKind::Path(ref qpath) = func.kind
&& matches!(qpath, QPath::LangItem(LangItem::IdentityFuture, _))
&& args.len() == 1
&& let ExprKind::Closure(CaptureBy::Value, fn_decl1, body_id1, _, Some(Movability::Static)) = args[0].kind
&& let ExprKind::Closure(CaptureBy::Value, fn_decl1, body_id1, _, Some(Movability::Static)) = expr1.kind
&& let FnRetTy::DefaultReturn(_) = fn_decl1.output
&& expr2 = &cx.tcx.hir().body(body_id1).value
&& let ExprKind::Block(block, None) = expr2.kind

35
tests/ui/boxed_local.rs
View file

@ -1,4 +1,3 @@
#![feature(box_syntax)]
#![feature(lint_reasons)]
#![allow(
clippy::borrowed_box,
@ -34,7 +33,7 @@ fn ok_box_trait(boxed_trait: &Box<dyn Z>) {
}
fn warn_call() {
let x = box A;
let x = Box::new(A);
x.foo();
}
@ -43,41 +42,41 @@ fn warn_arg(x: Box<A>) {
}
fn nowarn_closure_arg() {
let x = Some(box A);
let x = Some(Box::new(A));
x.map_or((), |x| take_ref(&x));
}
fn warn_rename_call() {
let x = box A;
let x = Box::new(A);
let y = x;
y.foo(); // via autoderef
}
fn warn_notuse() {
let bz = box A;
let bz = Box::new(A);
}
fn warn_pass() {
let bz = box A;
let bz = Box::new(A);
take_ref(&bz); // via deref coercion
}
fn nowarn_return() -> Box<A> {
box A // moved out, "escapes"
Box::new(A) // moved out, "escapes"
}
fn nowarn_move() {
let bx = box A;
let bx = Box::new(A);
drop(bx) // moved in, "escapes"
}
fn nowarn_call() {
let bx = box A;
let bx = Box::new(A);
bx.clone(); // method only available to Box, not via autoderef
}
fn nowarn_pass() {
let bx = box A;
let bx = Box::new(A);
take_box(&bx); // fn needs &Box
}
@ -86,30 +85,20 @@ fn take_ref(x: &A) {}
fn nowarn_ref_take() {
// false positive, should actually warn
let x = box A;
let x = Box::new(A);
let y = &x;
take_box(y);
}
fn nowarn_match() {
let x = box A; // moved into a match
let x = Box::new(A); // moved into a match
match x {
y => drop(y),
}
}
fn warn_match() {
let x = box A;
match &x {
// not moved
y => (),
}
}
fn nowarn_large_array() {
// should not warn, is large array
// and should not be on stack
let x = box [1; 10000];
let x = Box::new(A);
match &x {
// not moved
y => (),

8
tests/ui/boxed_local.stderr
View file

@ -1,5 +1,5 @@
error: local variable doesn't need to be boxed here
--> $DIR/boxed_local.rs:41:13
--> $DIR/boxed_local.rs:40:13
|
LL | fn warn_arg(x: Box<A>) {
| ^
@ -7,19 +7,19 @@ LL | fn warn_arg(x: Box<A>) {
= note: `-D clippy::boxed-local` implied by `-D warnings`
error: local variable doesn't need to be boxed here
--> $DIR/boxed_local.rs:132:12
--> $DIR/boxed_local.rs:121:12
|
LL | pub fn new(_needs_name: Box<PeekableSeekable<&()>>) -> () {}
| ^^^^^^^^^^^
error: local variable doesn't need to be boxed here
--> $DIR/boxed_local.rs:196:44
--> $DIR/boxed_local.rs:185:44
|
LL | fn default_impl_x(self: Box<Self>, x: Box<u32>) -> u32 {
| ^
error: local variable doesn't need to be boxed here
--> $DIR/boxed_local.rs:203:16
--> $DIR/boxed_local.rs:192:16
|
LL | fn foo(x: Box<u32>) {}
| ^

6
tests/ui/cast.rs
View file

@ -29,6 +29,12 @@ fn main() {
1f64 as isize;
1f64 as usize;
1f32 as u32 as u16;
{
let _x: i8 = 1i32 as _;
1f32 as i32;
1f64 as i32;
1f32 as u8;
}
// Test clippy::cast_possible_wrap
1u8 as i8;
1u16 as i16;

112
tests/ui/cast.stderr
View file

@ -44,10 +44,6 @@ LL | 1f32 as i32;
|
= help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
= note: `-D clippy::cast-possible-truncation` implied by `-D warnings`
help: ... or use `try_from` and handle the error accordingly
|
LL | i32::try_from(1f32);
| ~~~~~~~~~~~~~~~~~~~
error: casting `f32` to `u32` may truncate the value
--> $DIR/cast.rs:25:5
@ -56,10 +52,6 @@ LL | 1f32 as u32;
| ^^^^^^^^^^^
|
= help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
help: ... or use `try_from` and handle the error accordingly
|
LL | u32::try_from(1f32);
| ~~~~~~~~~~~~~~~~~~~
error: casting `f32` to `u32` may lose the sign of the value
--> $DIR/cast.rs:25:5
@ -76,10 +68,6 @@ LL | 1f64 as f32;
| ^^^^^^^^^^^
|
= help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
help: ... or use `try_from` and handle the error accordingly
|
LL | f32::try_from(1f64);
| ~~~~~~~~~~~~~~~~~~~
error: casting `i32` to `i8` may truncate the value
--> $DIR/cast.rs:27:5
@ -112,10 +100,6 @@ LL | 1f64 as isize;
| ^^^^^^^^^^^^^
|
= help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
help: ... or use `try_from` and handle the error accordingly
|
LL | isize::try_from(1f64);
| ~~~~~~~~~~~~~~~~~~~~~
error: casting `f64` to `usize` may truncate the value
--> $DIR/cast.rs:30:5
@ -124,10 +108,6 @@ LL | 1f64 as usize;
| ^^^^^^^^^^^^^
|
= help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
help: ... or use `try_from` and handle the error accordingly
|
LL | usize::try_from(1f64);
| ~~~~~~~~~~~~~~~~~~~~~
error: casting `f64` to `usize` may lose the sign of the value
--> $DIR/cast.rs:30:5
@ -154,10 +134,6 @@ LL | 1f32 as u32 as u16;
| ^^^^^^^^^^^
|
= help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
help: ... or use `try_from` and handle the error accordingly
|
LL | u32::try_from(1f32) as u16;
| ~~~~~~~~~~~~~~~~~~~
error: casting `f32` to `u32` may lose the sign of the value
--> $DIR/cast.rs:31:5
@ -165,8 +141,50 @@ error: casting `f32` to `u32` may lose the sign of the value
LL | 1f32 as u32 as u16;
| ^^^^^^^^^^^
error: casting `i32` to `i8` may truncate the value
--> $DIR/cast.rs:33:22
|
LL | let _x: i8 = 1i32 as _;
| ^^^^^^^^^
|
= help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
help: ... or use `try_from` and handle the error accordingly
|
LL | let _x: i8 = 1i32.try_into();
| ~~~~~~~~~~~~~~~
error: casting `f32` to `i32` may truncate the value
--> $DIR/cast.rs:34:9
|
LL | 1f32 as i32;
| ^^^^^^^^^^^
|
= help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
error: casting `f64` to `i32` may truncate the value
--> $DIR/cast.rs:35:9
|
LL | 1f64 as i32;
| ^^^^^^^^^^^
|
= help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
error: casting `f32` to `u8` may truncate the value
--> $DIR/cast.rs:36:9
|
LL | 1f32 as u8;
| ^^^^^^^^^^
|
= help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
error: casting `f32` to `u8` may lose the sign of the value
--> $DIR/cast.rs:36:9
|
LL | 1f32 as u8;
| ^^^^^^^^^^
error: casting `u8` to `i8` may wrap around the value
--> $DIR/cast.rs:33:5
--> $DIR/cast.rs:39:5
|
LL | 1u8 as i8;
| ^^^^^^^^^
@ -174,43 +192,43 @@ LL | 1u8 as i8;
= note: `-D clippy::cast-possible-wrap` implied by `-D warnings`
error: casting `u16` to `i16` may wrap around the value
--> $DIR/cast.rs:34:5
--> $DIR/cast.rs:40:5
|
LL | 1u16 as i16;
| ^^^^^^^^^^^
error: casting `u32` to `i32` may wrap around the value
--> $DIR/cast.rs:35:5
--> $DIR/cast.rs:41:5
|
LL | 1u32 as i32;
| ^^^^^^^^^^^
error: casting `u64` to `i64` may wrap around the value
--> $DIR/cast.rs:36:5
--> $DIR/cast.rs:42:5
|
LL | 1u64 as i64;
| ^^^^^^^^^^^
error: casting `usize` to `isize` may wrap around the value
--> $DIR/cast.rs:37:5
--> $DIR/cast.rs:43:5
|
LL | 1usize as isize;
| ^^^^^^^^^^^^^^^
error: casting `i32` to `u32` may lose the sign of the value
--> $DIR/cast.rs:40:5
--> $DIR/cast.rs:46:5
|
LL | -1i32 as u32;
| ^^^^^^^^^^^^
error: casting `isize` to `usize` may lose the sign of the value
--> $DIR/cast.rs:42:5
--> $DIR/cast.rs:48:5
|
LL | -1isize as usize;
| ^^^^^^^^^^^^^^^^
error: casting `i64` to `i8` may truncate the value
--> $DIR/cast.rs:109:5
--> $DIR/cast.rs:115:5
|
LL | (-99999999999i64).min(1) as i8; // should be linted because signed
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -222,7 +240,7 @@ LL | i8::try_from((-99999999999i64).min(1)); // should be linted because sig
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
error: casting `u64` to `u8` may truncate the value
--> $DIR/cast.rs:121:5
--> $DIR/cast.rs:127:5
|
LL | 999999u64.clamp(0, 256) as u8; // should still be linted
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@ -234,7 +252,7 @@ LL | u8::try_from(999999u64.clamp(0, 256)); // should still be linted
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
error: casting `main::E2` to `u8` may truncate the value
--> $DIR/cast.rs:142:21
--> $DIR/cast.rs:148:21
|
LL | let _ = self as u8;
| ^^^^^^^^^^
@ -246,7 +264,7 @@ LL | let _ = u8::try_from(self);
| ~~~~~~~~~~~~~~~~~~
error: casting `main::E2::B` to `u8` will truncate the value
--> $DIR/cast.rs:143:21
--> $DIR/cast.rs:149:21
|
LL | let _ = Self::B as u8;
| ^^^^^^^^^^^^^
@ -254,7 +272,7 @@ LL | let _ = Self::B as u8;
= note: `-D clippy::cast-enum-truncation` implied by `-D warnings`
error: casting `main::E5` to `i8` may truncate the value
--> $DIR/cast.rs:179:21
--> $DIR/cast.rs:185:21
|
LL | let _ = self as i8;
| ^^^^^^^^^^
@ -266,13 +284,13 @@ LL | let _ = i8::try_from(self);
| ~~~~~~~~~~~~~~~~~~
error: casting `main::E5::A` to `i8` will truncate the value
--> $DIR/cast.rs:180:21
--> $DIR/cast.rs:186:21
|
LL | let _ = Self::A as i8;
| ^^^^^^^^^^^^^
error: casting `main::E6` to `i16` may truncate the value
--> $DIR/cast.rs:194:21
--> $DIR/cast.rs:200:21
|
LL | let _ = self as i16;
| ^^^^^^^^^^^
@ -284,7 +302,7 @@ LL | let _ = i16::try_from(self);
| ~~~~~~~~~~~~~~~~~~~
error: casting `main::E7` to `usize` may truncate the value on targets with 32-bit wide pointers
--> $DIR/cast.rs:209:21
--> $DIR/cast.rs:215:21
|
LL | let _ = self as usize;
| ^^^^^^^^^^^^^
@ -296,7 +314,7 @@ LL | let _ = usize::try_from(self);
| ~~~~~~~~~~~~~~~~~~~~~
error: casting `main::E10` to `u16` may truncate the value
--> $DIR/cast.rs:250:21
--> $DIR/cast.rs:256:21
|
LL | let _ = self as u16;
| ^^^^^^^^^^^
@ -308,7 +326,7 @@ LL | let _ = u16::try_from(self);
| ~~~~~~~~~~~~~~~~~~~
error: casting `u32` to `u8` may truncate the value
--> $DIR/cast.rs:258:13
--> $DIR/cast.rs:264:13
|
LL | let c = (q >> 16) as u8;
| ^^^^^^^^^^^^^^^
@ -316,11 +334,11 @@ LL | let c = (q >> 16) as u8;
= help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
help: ... or use `try_from` and handle the error accordingly
|
LL | let c = u8::try_from((q >> 16));
| ~~~~~~~~~~~~~~~~~~~~~~~
LL | let c = u8::try_from(q >> 16);
| ~~~~~~~~~~~~~~~~~~~~~
error: casting `u32` to `u8` may truncate the value
--> $DIR/cast.rs:261:13
--> $DIR/cast.rs:267:13
|
LL | let c = (q / 1000) as u8;
| ^^^^^^^^^^^^^^^^
@ -328,8 +346,8 @@ LL | let c = (q / 1000) as u8;
= help: if this is intentional allow the lint with `#[allow(clippy::cast_possible_truncation)]` ...
help: ... or use `try_from` and handle the error accordingly
|
LL | let c = u8::try_from((q / 1000));
| ~~~~~~~~~~~~~~~~~~~~~~~~
LL | let c = u8::try_from(q / 1000);
| ~~~~~~~~~~~~~~~~~~~~~~
error: aborting due to 36 previous errors
error: aborting due to 41 previous errors

8
tests/ui/erasing_op.rs
View file

@ -31,9 +31,7 @@ impl core::ops::Mul<i32> for Vec1 {
#[allow(clippy::no_effect)]
#[warn(clippy::erasing_op)]
fn main() {
let x: u8 = 0;
fn test(x: u8) {
x * 0;
0 & x;
0 / x;
@ -41,3 +39,7 @@ fn main() {
0 * Vec1 { x: 5 };
Vec1 { x: 5 } * 0;
}
fn main() {
test(0)
}

10
tests/ui/erasing_op.stderr
View file

@ -1,5 +1,5 @@
error: this operation will always return zero. This is likely not the intended outcome
--> $DIR/erasing_op.rs:37:5
--> $DIR/erasing_op.rs:35:5
|
LL | x * 0;
| ^^^^^
@ -7,25 +7,25 @@ LL | x * 0;
= note: `-D clippy::erasing-op` implied by `-D warnings`
error: this operation will always return zero. This is likely not the intended outcome
--> $DIR/erasing_op.rs:38:5
--> $DIR/erasing_op.rs:36:5
|
LL | 0 & x;
| ^^^^^
error: this operation will always return zero. This is likely not the intended outcome
--> $DIR/erasing_op.rs:39:5
--> $DIR/erasing_op.rs:37:5
|
LL | 0 / x;
| ^^^^^
error: this operation will always return zero. This is likely not the intended outcome
--> $DIR/erasing_op.rs:41:5
--> $DIR/erasing_op.rs:39:5
|
LL | 0 * Vec1 { x: 5 };
| ^^^^^^^^^^^^^^^^^
error: this operation will always return zero. This is likely not the intended outcome
--> $DIR/erasing_op.rs:42:5
--> $DIR/erasing_op.rs:40:5
|
LL | Vec1 { x: 5 } * 0;
| ^^^^^^^^^^^^^^^^^

2
tests/ui/integer_arithmetic.rs
View file

@ -4,7 +4,7 @@
#[rustfmt::skip]
fn main() {
let mut i = 1i32;
let mut var1 = 0i32;
let mut var1 = 13i32;
let mut var2 = -1i32;
1 + i;
i * 2;

2
tests/ui/needless_update.rs
View file

@ -1,5 +1,5 @@
#![warn(clippy::needless_update)]
#![allow(clippy::no_effect)]
#![allow(clippy::no_effect, clippy::unnecessary_struct_initialization)]
struct S {
pub a: i32,

10
tests/ui/no_effect.rs
View file

@ -1,7 +1,12 @@
#![feature(box_syntax, fn_traits, unboxed_closures)]
#![feature(fn_traits, unboxed_closures)]
#![warn(clippy::no_effect_underscore_binding)]
#![allow(dead_code, path_statements)]
#![allow(clippy::deref_addrof, clippy::redundant_field_names, clippy::uninlined_format_args)]
#![allow(
clippy::deref_addrof,
clippy::redundant_field_names,
clippy::uninlined_format_args,
clippy::unnecessary_struct_initialization
)]
struct Unit;
struct Tuple(i32);
@ -102,7 +107,6 @@ fn main() {
*&42;
&6;
(5, 6, 7);
box 42;
..;
5..;
..5;

66
tests/ui/no_effect.stderr
View file

@ -1,5 +1,5 @@
error: statement with no effect
--> $DIR/no_effect.rs:92:5
--> $DIR/no_effect.rs:97:5
|
LL | 0;
| ^^
@ -7,157 +7,151 @@ LL | 0;
= note: `-D clippy::no-effect` implied by `-D warnings`
error: statement with no effect
--> $DIR/no_effect.rs:93:5
--> $DIR/no_effect.rs:98:5
|
LL | s2;
| ^^^
error: statement with no effect
--> $DIR/no_effect.rs:94:5
--> $DIR/no_effect.rs:99:5
|
LL | Unit;
| ^^^^^
error: statement with no effect
--> $DIR/no_effect.rs:95:5
--> $DIR/no_effect.rs:100:5
|
LL | Tuple(0);
| ^^^^^^^^^
error: statement with no effect
--> $DIR/no_effect.rs:96:5
--> $DIR/no_effect.rs:101:5
|
LL | Struct { field: 0 };
| ^^^^^^^^^^^^^^^^^^^^
error: statement with no effect
--> $DIR/no_effect.rs:97:5
--> $DIR/no_effect.rs:102:5
|
LL | Struct { ..s };
| ^^^^^^^^^^^^^^^
error: statement with no effect
--> $DIR/no_effect.rs:98:5
--> $DIR/no_effect.rs:103:5
|
LL | Union { a: 0 };
| ^^^^^^^^^^^^^^^
error: statement with no effect
--> $DIR/no_effect.rs:99:5
--> $DIR/no_effect.rs:104:5
|
LL | Enum::Tuple(0);
| ^^^^^^^^^^^^^^^
error: statement with no effect
--> $DIR/no_effect.rs:100:5
--> $DIR/no_effect.rs:105:5
|
LL | Enum::Struct { field: 0 };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
error: statement with no effect
--> $DIR/no_effect.rs:101:5
--> $DIR/no_effect.rs:106:5
|
LL | 5 + 6;
| ^^^^^^
error: statement with no effect
--> $DIR/no_effect.rs:102:5
--> $DIR/no_effect.rs:107:5
|
LL | *&42;
| ^^^^^
error: statement with no effect
--> $DIR/no_effect.rs:103:5
--> $DIR/no_effect.rs:108:5
|
LL | &6;
| ^^^
error: statement with no effect
--> $DIR/no_effect.rs:104:5
--> $DIR/no_effect.rs:109:5
|
LL | (5, 6, 7);
| ^^^^^^^^^^
error: statement with no effect
--> $DIR/no_effect.rs:105:5
|
LL | box 42;
| ^^^^^^^
error: statement with no effect
--> $DIR/no_effect.rs:106:5
--> $DIR/no_effect.rs:110:5
|
LL | ..;
| ^^^
error: statement with no effect
--> $DIR/no_effect.rs:107:5
--> $DIR/no_effect.rs:111:5
|
LL | 5..;
| ^^^^
error: statement with no effect
--> $DIR/no_effect.rs:108:5
--> $DIR/no_effect.rs:112:5
|
LL | ..5;
| ^^^^
error: statement with no effect
--> $DIR/no_effect.rs:109:5
--> $DIR/no_effect.rs:113:5
|
LL | 5..6;
| ^^^^^
error: statement with no effect
--> $DIR/no_effect.rs:110:5
--> $DIR/no_effect.rs:114:5
|
LL | 5..=6;
| ^^^^^^
error: statement with no effect
--> $DIR/no_effect.rs:111:5
--> $DIR/no_effect.rs:115:5
|
LL | [42, 55];
| ^^^^^^^^^
error: statement with no effect
--> $DIR/no_effect.rs:112:5
--> $DIR/no_effect.rs:116:5
|
LL | [42, 55][1];
| ^^^^^^^^^^^^
error: statement with no effect
--> $DIR/no_effect.rs:113:5
--> $DIR/no_effect.rs:117:5
|
LL | (42, 55).1;
| ^^^^^^^^^^^
error: statement with no effect
--> $DIR/no_effect.rs:114:5
--> $DIR/no_effect.rs:118:5
|
LL | [42; 55];
| ^^^^^^^^^
error: statement with no effect
--> $DIR/no_effect.rs:115:5
--> $DIR/no_effect.rs:119:5
|
LL | [42; 55][13];
| ^^^^^^^^^^^^^
error: statement with no effect
--> $DIR/no_effect.rs:117:5
--> $DIR/no_effect.rs:121:5
|
LL | || x += 5;
| ^^^^^^^^^^
error: statement with no effect
--> $DIR/no_effect.rs:119:5
--> $DIR/no_effect.rs:123:5
|
LL | FooString { s: s };
| ^^^^^^^^^^^^^^^^^^^
error: binding to `_` prefixed variable with no side-effect
--> $DIR/no_effect.rs:120:5
--> $DIR/no_effect.rs:124:5
|
LL | let _unused = 1;
| ^^^^^^^^^^^^^^^^
@ -165,22 +159,22 @@ LL | let _unused = 1;
= note: `-D clippy::no-effect-underscore-binding` implied by `-D warnings`
error: binding to `_` prefixed variable with no side-effect
--> $DIR/no_effect.rs:121:5
--> $DIR/no_effect.rs:125:5
|
LL | let _penguin = || println!("Some helpful closure");
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: binding to `_` prefixed variable with no side-effect
--> $DIR/no_effect.rs:122:5
--> $DIR/no_effect.rs:126:5
|
LL | let _duck = Struct { field: 0 };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: binding to `_` prefixed variable with no side-effect
--> $DIR/no_effect.rs:123:5
--> $DIR/no_effect.rs:127:5
|
LL | let _cat = [2, 4, 6, 8][2];
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^
error: aborting due to 30 previous errors
error: aborting due to 29 previous errors

29
tests/ui/nonminimal_bool.rs
View file

@ -63,3 +63,32 @@ fn issue9428() {
println!("foo");
}
}
fn issue_10523() {
macro_rules! a {
($v:expr) => {
$v.is_some()
};
}
let x: Option<u32> = None;
if !a!(x) {}
}
fn issue_10523_1() {
macro_rules! a {
($v:expr) => {
!$v.is_some()
};
}
let x: Option<u32> = None;
if a!(x) {}
}
fn issue_10523_2() {
macro_rules! a {
() => {
!None::<u32>.is_some()
};
}
if a!() {}
}

9
tests/ui/overflow_check_conditional.rs
View file

@ -1,9 +1,6 @@
#![warn(clippy::overflow_check_conditional)]
fn main() {
let a: u32 = 1;
let b: u32 = 2;
let c: u32 = 3;
fn test(a: u32, b: u32, c: u32) {
if a + b < a {}
if a > a + b {}
if a + b < b {}
@ -23,3 +20,7 @@ fn main() {
if i > i + j {}
if i - j < i {}
}
fn main() {
test(1, 2, 3)
}

16
tests/ui/overflow_check_conditional.stderr
View file

@ -1,5 +1,5 @@
error: you are trying to use classic C overflow conditions that will fail in Rust
--> $DIR/overflow_check_conditional.rs:7:8
--> $DIR/overflow_check_conditional.rs:4:8
|
LL | if a + b < a {}
| ^^^^^^^^^
@ -7,43 +7,43 @@ LL | if a + b < a {}
= note: `-D clippy::overflow-check-conditional` implied by `-D warnings`
error: you are trying to use classic C overflow conditions that will fail in Rust
--> $DIR/overflow_check_conditional.rs:8:8
--> $DIR/overflow_check_conditional.rs:5:8
|
LL | if a > a + b {}
| ^^^^^^^^^
error: you are trying to use classic C overflow conditions that will fail in Rust
--> $DIR/overflow_check_conditional.rs:9:8
--> $DIR/overflow_check_conditional.rs:6:8
|
LL | if a + b < b {}
| ^^^^^^^^^
error: you are trying to use classic C overflow conditions that will fail in Rust
--> $DIR/overflow_check_conditional.rs:10:8
--> $DIR/overflow_check_conditional.rs:7:8
|
LL | if b > a + b {}
| ^^^^^^^^^
error: you are trying to use classic C underflow conditions that will fail in Rust
--> $DIR/overflow_check_conditional.rs:11:8
--> $DIR/overflow_check_conditional.rs:8:8
|
LL | if a - b > b {}
| ^^^^^^^^^
error: you are trying to use classic C underflow conditions that will fail in Rust
--> $DIR/overflow_check_conditional.rs:12:8
--> $DIR/overflow_check_conditional.rs:9:8
|
LL | if b < a - b {}
| ^^^^^^^^^
error: you are trying to use classic C underflow conditions that will fail in Rust
--> $DIR/overflow_check_conditional.rs:13:8
--> $DIR/overflow_check_conditional.rs:10:8
|
LL | if a - b > a {}
| ^^^^^^^^^
error: you are trying to use classic C underflow conditions that will fail in Rust
--> $DIR/overflow_check_conditional.rs:14:8
--> $DIR/overflow_check_conditional.rs:11:8
|
LL | if a < a - b {}
| ^^^^^^^^^

8
tests/ui/transmutes_expressible_as_ptr_casts.fixed
View file

@ -4,7 +4,7 @@
// would otherwise be responsible for
#![warn(clippy::useless_transmute)]
#![warn(clippy::transmute_ptr_to_ptr)]
#![allow(dead_code, unused_unsafe, clippy::borrow_as_ptr)]
#![allow(unused, clippy::borrow_as_ptr)]
use std::mem::{size_of, transmute};
@ -77,3 +77,9 @@ fn cannot_be_expressed_as_pointer_cast(in_param: Single) -> Pair {
unsafe { transmute::<Single, Pair>(in_param) }
}
fn issue_10449() {
fn f() {}
let _x: u8 = unsafe { *(f as *const u8) };
}

8
tests/ui/transmutes_expressible_as_ptr_casts.rs
View file

@ -4,7 +4,7 @@
// would otherwise be responsible for
#![warn(clippy::useless_transmute)]
#![warn(clippy::transmute_ptr_to_ptr)]
#![allow(dead_code, unused_unsafe, clippy::borrow_as_ptr)]
#![allow(unused, clippy::borrow_as_ptr)]
use std::mem::{size_of, transmute};
@ -77,3 +77,9 @@ fn cannot_be_expressed_as_pointer_cast(in_param: Single) -> Pair {
unsafe { transmute::<Single, Pair>(in_param) }
}
fn issue_10449() {
fn f() {}
let _x: u8 = unsafe { *std::mem::transmute::<fn(), *const u8>(f) };
}

8
tests/ui/transmutes_expressible_as_ptr_casts.stderr
View file

@ -58,5 +58,11 @@ error: transmute from a reference to a pointer
LL | unsafe { transmute::<&[i32; 1], *const u8>(in_param) }
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `in_param as *const [i32; 1] as *const u8`
error: aborting due to 9 previous errors
error: transmute from `fn()` to `*const u8` which could be expressed as a pointer cast instead
--> $DIR/transmutes_expressible_as_ptr_casts.rs:84:28
|
LL | let _x: u8 = unsafe { *std::mem::transmute::<fn(), *const u8>(f) };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `(f as *const u8)`
error: aborting due to 10 previous errors

10
tests/ui/unnecessary_operation.fixed
View file

@ -1,7 +1,12 @@
// run-rustfix
#![feature(box_syntax)]
#![allow(clippy::deref_addrof, dead_code, unused, clippy::no_effect)]
#![allow(
clippy::deref_addrof,
dead_code,
unused,
clippy::no_effect,
clippy::unnecessary_struct_initialization
)]
#![warn(clippy::unnecessary_operation)]
struct Tuple(i32);
@ -59,7 +64,6 @@ fn main() {
5;6;get_number();
get_number();
get_number();
get_number();
5;get_number();
42;get_number();
assert!([42, 55].len() > get_usize());

10
tests/ui/unnecessary_operation.rs
View file

@ -1,7 +1,12 @@
// run-rustfix
#![feature(box_syntax)]
#![allow(clippy::deref_addrof, dead_code, unused, clippy::no_effect)]
#![allow(
clippy::deref_addrof,
dead_code,
unused,
clippy::no_effect,
clippy::unnecessary_struct_initialization
)]
#![warn(clippy::unnecessary_operation)]
struct Tuple(i32);
@ -57,7 +62,6 @@ fn main() {
*&get_number();
&get_number();
(5, 6, get_number());
box get_number();
get_number()..;
..get_number();
5..get_number();

46
tests/ui/unnecessary_operation.stderr
View file

@ -1,5 +1,5 @@
error: unnecessary operation
--> $DIR/unnecessary_operation.rs:51:5
--> $DIR/unnecessary_operation.rs:56:5
|
LL | Tuple(get_number());
| ^^^^^^^^^^^^^^^^^^^^ help: statement can be reduced to: `get_number();`
@ -7,109 +7,103 @@ LL | Tuple(get_number());
= note: `-D clippy::unnecessary-operation` implied by `-D warnings`
error: unnecessary operation
--> $DIR/unnecessary_operation.rs:52:5
--> $DIR/unnecessary_operation.rs:57:5
|
LL | Struct { field: get_number() };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: statement can be reduced to: `get_number();`
error: unnecessary operation
--> $DIR/unnecessary_operation.rs:53:5
--> $DIR/unnecessary_operation.rs:58:5
|
LL | Struct { ..get_struct() };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: statement can be reduced to: `get_struct();`
error: unnecessary operation
--> $DIR/unnecessary_operation.rs:54:5
--> $DIR/unnecessary_operation.rs:59:5
|
LL | Enum::Tuple(get_number());
| ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: statement can be reduced to: `get_number();`
error: unnecessary operation
--> $DIR/unnecessary_operation.rs:55:5
--> $DIR/unnecessary_operation.rs:60:5
|
LL | Enum::Struct { field: get_number() };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: statement can be reduced to: `get_number();`
error: unnecessary operation
--> $DIR/unnecessary_operation.rs:56:5
--> $DIR/unnecessary_operation.rs:61:5
|
LL | 5 + get_number();
| ^^^^^^^^^^^^^^^^^ help: statement can be reduced to: `5;get_number();`
error: unnecessary operation
--> $DIR/unnecessary_operation.rs:57:5
--> $DIR/unnecessary_operation.rs:62:5
|
LL | *&get_number();
| ^^^^^^^^^^^^^^^ help: statement can be reduced to: `get_number();`
error: unnecessary operation
--> $DIR/unnecessary_operation.rs:58:5
--> $DIR/unnecessary_operation.rs:63:5
|
LL | &get_number();
| ^^^^^^^^^^^^^^ help: statement can be reduced to: `get_number();`
error: unnecessary operation
--> $DIR/unnecessary_operation.rs:59:5
--> $DIR/unnecessary_operation.rs:64:5
|
LL | (5, 6, get_number());
| ^^^^^^^^^^^^^^^^^^^^^ help: statement can be reduced to: `5;6;get_number();`
error: unnecessary operation
--> $DIR/unnecessary_operation.rs:60:5
|
LL | box get_number();
| ^^^^^^^^^^^^^^^^^ help: statement can be reduced to: `get_number();`
error: unnecessary operation
--> $DIR/unnecessary_operation.rs:61:5
--> $DIR/unnecessary_operation.rs:65:5
|
LL | get_number()..;
| ^^^^^^^^^^^^^^^ help: statement can be reduced to: `get_number();`
error: unnecessary operation
--> $DIR/unnecessary_operation.rs:62:5
--> $DIR/unnecessary_operation.rs:66:5
|
LL | ..get_number();
| ^^^^^^^^^^^^^^^ help: statement can be reduced to: `get_number();`
error: unnecessary operation
--> $DIR/unnecessary_operation.rs:63:5
--> $DIR/unnecessary_operation.rs:67:5
|
LL | 5..get_number();
| ^^^^^^^^^^^^^^^^ help: statement can be reduced to: `5;get_number();`
error: unnecessary operation
--> $DIR/unnecessary_operation.rs:64:5
--> $DIR/unnecessary_operation.rs:68:5
|
LL | [42, get_number()];
| ^^^^^^^^^^^^^^^^^^^ help: statement can be reduced to: `42;get_number();`
error: unnecessary operation
--> $DIR/unnecessary_operation.rs:65:5
--> $DIR/unnecessary_operation.rs:69:5
|
LL | [42, 55][get_usize()];
| ^^^^^^^^^^^^^^^^^^^^^^ help: statement can be written as: `assert!([42, 55].len() > get_usize());`
error: unnecessary operation
--> $DIR/unnecessary_operation.rs:66:5
--> $DIR/unnecessary_operation.rs:70:5
|
LL | (42, get_number()).1;
| ^^^^^^^^^^^^^^^^^^^^^ help: statement can be reduced to: `42;get_number();`
error: unnecessary operation
--> $DIR/unnecessary_operation.rs:67:5
--> $DIR/unnecessary_operation.rs:71:5
|
LL | [get_number(); 55];
| ^^^^^^^^^^^^^^^^^^^ help: statement can be reduced to: `get_number();`
error: unnecessary operation
--> $DIR/unnecessary_operation.rs:68:5
--> $DIR/unnecessary_operation.rs:72:5
|
LL | [42; 55][get_usize()];
| ^^^^^^^^^^^^^^^^^^^^^^ help: statement can be written as: `assert!([42; 55].len() > get_usize());`
error: unnecessary operation
--> $DIR/unnecessary_operation.rs:69:5
--> $DIR/unnecessary_operation.rs:73:5
|
LL | / {
LL | | get_number()
@ -117,12 +111,12 @@ LL | | };
| |______^ help: statement can be reduced to: `get_number();`
error: unnecessary operation
--> $DIR/unnecessary_operation.rs:72:5
--> $DIR/unnecessary_operation.rs:76:5
|
LL | / FooString {
LL | | s: String::from("blah"),
LL | | };
| |______^ help: statement can be reduced to: `String::from("blah");`
error: aborting due to 20 previous errors
error: aborting due to 19 previous errors

73
tests/ui/unnecessary_struct_initialization.fixed Normal file
View file

@ -0,0 +1,73 @@
// run-rustfix
#![allow(unused)]
#![warn(clippy::unnecessary_struct_initialization)]
struct S {
f: String,
}
#[derive(Clone, Copy)]
struct T {
f: u32,
}
struct U {
f: u32,
}
impl Clone for U {
fn clone(&self) -> Self {
// Do not lint: `Self` does not implement `Copy`
Self { ..*self }
}
}
#[derive(Copy)]
struct V {
f: u32,
}
impl Clone for V {
fn clone(&self) -> Self {
// Lint: `Self` implements `Copy`
*self
}
}
fn main() {
// Should lint: `a` would be consumed anyway
let a = S { f: String::from("foo") };
let mut b = a;
// Should lint: `b` would be consumed, and is mutable
let c = &mut b;
// Should not lint as `d` is not mutable
let d = S { f: String::from("foo") };
let e = &mut S { ..d };
// Should lint as `f` would be consumed anyway
let f = S { f: String::from("foo") };
let g = &f;
// Should lint: the result of an expression is mutable
let h = &mut *Box::new(S { f: String::from("foo") });
// Should not lint: `m` would be both alive and borrowed
let m = T { f: 17 };
let n = &T { ..m };
// Should not lint: `m` should not be modified
let o = &mut T { ..m };
o.f = 32;
assert_eq!(m.f, 17);
// Should not lint: `m` should not be modified
let o = &mut T { ..m } as *mut T;
unsafe { &mut *o }.f = 32;
assert_eq!(m.f, 17);
// Should lint: the result of an expression is mutable and temporary
let p = &mut *Box::new(T { f: 5 });
}

77
tests/ui/unnecessary_struct_initialization.rs Normal file
View file

@ -0,0 +1,77 @@
// run-rustfix
#![allow(unused)]
#![warn(clippy::unnecessary_struct_initialization)]
struct S {
f: String,
}
#[derive(Clone, Copy)]
struct T {
f: u32,
}
struct U {
f: u32,
}
impl Clone for U {
fn clone(&self) -> Self {
// Do not lint: `Self` does not implement `Copy`
Self { ..*self }
}
}
#[derive(Copy)]
struct V {
f: u32,
}
impl Clone for V {
fn clone(&self) -> Self {
// Lint: `Self` implements `Copy`
Self { ..*self }
}
}
fn main() {
// Should lint: `a` would be consumed anyway
let a = S { f: String::from("foo") };
let mut b = S { ..a };
// Should lint: `b` would be consumed, and is mutable
let c = &mut S { ..b };
// Should not lint as `d` is not mutable
let d = S { f: String::from("foo") };
let e = &mut S { ..d };
// Should lint as `f` would be consumed anyway
let f = S { f: String::from("foo") };
let g = &S { ..f };
// Should lint: the result of an expression is mutable
let h = &mut S {
..*Box::new(S { f: String::from("foo") })
};
// Should not lint: `m` would be both alive and borrowed
let m = T { f: 17 };
let n = &T { ..m };
// Should not lint: `m` should not be modified
let o = &mut T { ..m };
o.f = 32;
assert_eq!(m.f, 17);
// Should not lint: `m` should not be modified
let o = &mut T { ..m } as *mut T;
unsafe { &mut *o }.f = 32;
assert_eq!(m.f, 17);
// Should lint: the result of an expression is mutable and temporary
let p = &mut T {
..*Box::new(T { f: 5 })
};
}

46
tests/ui/unnecessary_struct_initialization.stderr Normal file
View file

@ -0,0 +1,46 @@
error: unnecessary struct building
--> $DIR/unnecessary_struct_initialization.rs:34:9
|
LL | Self { ..*self }
| ^^^^^^^^^^^^^^^^ help: replace with: `*self`
|
= note: `-D clippy::unnecessary-struct-initialization` implied by `-D warnings`
error: unnecessary struct building
--> $DIR/unnecessary_struct_initialization.rs:41:17
|
LL | let mut b = S { ..a };
| ^^^^^^^^^ help: replace with: `a`
error: unnecessary struct building
--> $DIR/unnecessary_struct_initialization.rs:44:18
|
LL | let c = &mut S { ..b };
| ^^^^^^^^^ help: replace with: `b`
error: unnecessary struct building
--> $DIR/unnecessary_struct_initialization.rs:52:14
|
LL | let g = &S { ..f };
| ^^^^^^^^^ help: replace with: `f`
error: unnecessary struct building
--> $DIR/unnecessary_struct_initialization.rs:55:18
|
LL | let h = &mut S {
| __________________^
LL | | ..*Box::new(S { f: String::from("foo") })
LL | | };
| |_____^ help: replace with: `*Box::new(S { f: String::from("foo") })`
error: unnecessary struct building
--> $DIR/unnecessary_struct_initialization.rs:74:18
|
LL | let p = &mut T {
| __________________^
LL | | ..*Box::new(T { f: 5 })
LL | | };
| |_____^ help: replace with: `*Box::new(T { f: 5 })`
error: aborting due to 6 previous errors