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Merge remote-tracking branch 'upstream/master' into rustup

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Philipp Krones 2023-08-24 21:04:57 +02:00
commit ef4d64f1bd
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1888 changed files with 16725 additions and 9914 deletions
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1
clippy_lints/src/methods/implicit_clone.rs
View file

@ -17,6 +17,7 @@ pub fn check(cx: &LateContext<'_>, method_name: &str, expr: &hir::Expr<'_>, recv
let return_type = cx.typeck_results().expr_ty(expr);
let input_type = cx.typeck_results().expr_ty(recv);
let (input_type, ref_count) = peel_mid_ty_refs(input_type);
if !(ref_count > 0 && is_diag_trait_item(cx, method_def_id, sym::ToOwned));
if let Some(ty_name) = input_type.ty_adt_def().map(|adt_def| cx.tcx.item_name(adt_def.did()));
if return_type == input_type;
if let Some(clone_trait) = cx.tcx.lang_items().clone_trait();

126
clippy_lints/src/methods/iter_overeager_cloned.rs
View file

@ -1,21 +1,45 @@
use clippy_utils::diagnostics::span_lint_and_then;
use clippy_utils::source::snippet_opt;
use clippy_utils::ty::{implements_trait, is_copy};
use rustc_ast::BindingAnnotation;
use rustc_errors::Applicability;
use rustc_hir::Expr;
use rustc_hir::{Body, Expr, ExprKind, HirId, HirIdSet, PatKind};
use rustc_hir_typeck::expr_use_visitor::{Delegate, ExprUseVisitor, PlaceBase, PlaceWithHirId};
use rustc_lint::LateContext;
use rustc_middle::ty;
use rustc_middle::mir::{FakeReadCause, Mutability};
use rustc_middle::ty::{self, BorrowKind};
use rustc_span::sym;
use super::ITER_OVEREAGER_CLONED;
use crate::redundant_clone::REDUNDANT_CLONE;
use crate::rustc_trait_selection::infer::TyCtxtInferExt;
#[derive(Clone, Copy)]
pub(super) enum Op<'a> {
// rm `.cloned()`
// e.g. `count`
RmCloned,
// rm `.cloned()`
// e.g. `map` `for_each`
NeedlessMove(&'a str, &'a Expr<'a>),
// later `.cloned()`
// and add `&` to the parameter of closure parameter
// e.g. `find` `filter`
FixClosure(&'a str, &'a Expr<'a>),
// later `.cloned()`
// e.g. `skip` `take`
LaterCloned,
}
pub(super) fn check<'tcx>(
cx: &LateContext<'tcx>,
expr: &'tcx Expr<'_>,
cloned_call: &'tcx Expr<'_>,
cloned_recv: &'tcx Expr<'_>,
is_count: bool,
op: Op<'tcx>,
needs_into_iter: bool,
) {
let typeck = cx.typeck_results();
@ -35,10 +59,47 @@ pub(super) fn check<'tcx>(
return;
}
let (lint, msg, trailing_clone) = if is_count {
(REDUNDANT_CLONE, "unneeded cloning of iterator items", "")
} else {
(ITER_OVEREAGER_CLONED, "unnecessarily eager cloning of iterator items", ".cloned()")
if let Op::NeedlessMove(_, expr) = op {
let rustc_hir::ExprKind::Closure(closure) = expr.kind else { return } ;
let body @ Body { params: [p], .. } = cx.tcx.hir().body(closure.body) else { return };
let mut delegate = MoveDelegate {used_move : HirIdSet::default()};
let infcx = cx.tcx.infer_ctxt().build();
ExprUseVisitor::new(
&mut delegate,
&infcx,
closure.body.hir_id.owner.def_id,
cx.param_env,
cx.typeck_results(),
)
.consume_body(body);
let mut to_be_discarded = false;
p.pat.walk(|it| {
if delegate.used_move.contains(&it.hir_id){
to_be_discarded = true;
return false;
}
match it.kind {
PatKind::Binding(BindingAnnotation(_, Mutability::Mut), _, _, _)
| PatKind::Ref(_, Mutability::Mut) => {
to_be_discarded = true;
false
}
_ => { true }
}
});
if to_be_discarded {
return;
}
}
let (lint, msg, trailing_clone) = match op {
Op::RmCloned | Op::NeedlessMove(_, _) => (REDUNDANT_CLONE, "unneeded cloning of iterator items", ""),
Op::LaterCloned | Op::FixClosure(_, _) => (ITER_OVEREAGER_CLONED, "unnecessarily eager cloning of iterator items", ".cloned()"),
};
span_lint_and_then(
@ -47,13 +108,54 @@ pub(super) fn check<'tcx>(
expr.span,
msg,
|diag| {
let method_span = expr.span.with_lo(cloned_call.span.hi());
if let Some(mut snip) = snippet_opt(cx, method_span) {
snip.push_str(trailing_clone);
let replace_span = expr.span.with_lo(cloned_recv.span.hi());
diag.span_suggestion(replace_span, "try", snip, Applicability::MachineApplicable);
match op {
Op::RmCloned | Op::LaterCloned => {
let method_span = expr.span.with_lo(cloned_call.span.hi());
if let Some(mut snip) = snippet_opt(cx, method_span) {
snip.push_str(trailing_clone);
let replace_span = expr.span.with_lo(cloned_recv.span.hi());
diag.span_suggestion(replace_span, "try", snip, Applicability::MachineApplicable);
}
}
Op::FixClosure(name, predicate_expr) => {
if let Some(predicate) = snippet_opt(cx, predicate_expr.span) {
let new_closure = if let ExprKind::Closure(_) = predicate_expr.kind {
predicate.replacen('|', "|&", 1)
} else {
format!("|&x| {predicate}(x)")
};
let snip = format!(".{name}({new_closure}).cloned()" );
let replace_span = expr.span.with_lo(cloned_recv.span.hi());
diag.span_suggestion(replace_span, "try", snip, Applicability::MachineApplicable);
}
}
Op::NeedlessMove(_, _) => {
let method_span = expr.span.with_lo(cloned_call.span.hi());
if let Some(snip) = snippet_opt(cx, method_span) {
let replace_span = expr.span.with_lo(cloned_recv.span.hi());
diag.span_suggestion(replace_span, "try", snip, Applicability::MaybeIncorrect);
}
}
}
}
);
}
}
struct MoveDelegate {
used_move: HirIdSet,
}
impl<'tcx> Delegate<'tcx> for MoveDelegate {
fn consume(&mut self, place_with_id: &PlaceWithHirId<'tcx>, _: HirId) {
if let PlaceBase::Local(l) = place_with_id.place.base {
self.used_move.insert(l);
}
}
fn borrow(&mut self, _: &PlaceWithHirId<'tcx>, _: HirId, _: BorrowKind) {}
fn mutate(&mut self, _: &PlaceWithHirId<'tcx>, _: HirId) {}
fn fake_read(&mut self, _: &PlaceWithHirId<'tcx>, _: FakeReadCause, _: HirId) {}
}

42
clippy_lints/src/methods/mod.rs
View file

@ -301,7 +301,7 @@ declare_clippy_lint! {
/// let val2 = 1;
/// let val3 = 1;
/// ```
#[clippy::version = "1.69.0"]
#[clippy::version = "1.72.0"]
pub UNNECESSARY_LITERAL_UNWRAP,
complexity,
"using `unwrap()` related calls on `Result` and `Option` constructors"
@ -3328,7 +3328,7 @@ declare_clippy_lint! {
/// mem::take(v)
/// }
/// ```
#[clippy::version = "1.71.0"]
#[clippy::version = "1.72.0"]
pub DRAIN_COLLECT,
perf,
"calling `.drain(..).collect()` to move all elements into a new collection"
@ -3919,7 +3919,7 @@ impl Methods {
}
},
("count", []) if is_trait_method(cx, expr, sym::Iterator) => match method_call(recv) {
Some(("cloned", recv2, [], _, _)) => iter_overeager_cloned::check(cx, expr, recv, recv2, true, false),
Some(("cloned", recv2, [], _, _)) => iter_overeager_cloned::check(cx, expr, recv, recv2, iter_overeager_cloned::Op::RmCloned , false),
Some((name2 @ ("into_iter" | "iter" | "iter_mut"), recv2, [], _, _)) => {
iter_count::check(cx, expr, recv2, name2);
},
@ -3973,6 +3973,13 @@ impl Methods {
string_extend_chars::check(cx, expr, recv, arg);
extend_with_drain::check(cx, expr, recv, arg);
},
(name @ ( "filter" | "find" ) , [arg]) => {
if let Some(("cloned", recv2, [], _span2, _)) = method_call(recv) {
// if `arg` has side-effect, the semantic will change
iter_overeager_cloned::check(cx, expr, recv, recv2,
iter_overeager_cloned::Op::FixClosure(name, arg), false);
}
}
("filter_map", [arg]) => {
unnecessary_filter_map::check(cx, expr, arg, name);
filter_map_bool_then::check(cx, expr, arg, call_span);
@ -3987,16 +3994,18 @@ impl Methods {
},
("flatten", []) => match method_call(recv) {
Some(("map", recv, [map_arg], map_span, _)) => map_flatten::check(cx, expr, recv, map_arg, map_span),
Some(("cloned", recv2, [], _, _)) => iter_overeager_cloned::check(cx, expr, recv, recv2, false, true),
Some(("cloned", recv2, [], _, _)) => iter_overeager_cloned::check(cx, expr, recv, recv2, iter_overeager_cloned::Op::LaterCloned , true),
_ => {},
},
("fold", [init, acc]) => {
manual_try_fold::check(cx, expr, init, acc, call_span, &self.msrv);
unnecessary_fold::check(cx, expr, init, acc, span);
},
("for_each", [_]) => {
if let Some(("inspect", _, [_], span2, _)) = method_call(recv) {
inspect_for_each::check(cx, expr, span2);
("for_each", [arg]) => {
match method_call(recv) {
Some(("inspect", _, [_], span2, _)) => inspect_for_each::check(cx, expr, span2),
Some(("cloned", recv2, [], _, _)) => iter_overeager_cloned::check(cx, expr, recv, recv2, iter_overeager_cloned::Op::NeedlessMove(name, arg), false),
_ => {}
}
},
("get", [arg]) => {
@ -4021,7 +4030,8 @@ impl Methods {
},
("last", []) => {
if let Some(("cloned", recv2, [], _span2, _)) = method_call(recv) {
iter_overeager_cloned::check(cx, expr, recv, recv2, false, false);
iter_overeager_cloned::check(cx, expr, recv, recv2,
iter_overeager_cloned::Op::LaterCloned , false);
}
},
("lock", []) => {
@ -4030,8 +4040,10 @@ impl Methods {
(name @ ("map" | "map_err"), [m_arg]) => {
if name == "map" {
map_clone::check(cx, expr, recv, m_arg, &self.msrv);
if let Some((map_name @ ("iter" | "into_iter"), recv2, _, _, _)) = method_call(recv) {
iter_kv_map::check(cx, map_name, expr, recv2, m_arg);
match method_call(recv) {
Some((map_name @ ("iter" | "into_iter"), recv2, _, _, _)) => iter_kv_map::check(cx, map_name, expr, recv2, m_arg),
Some(("cloned", recv2, [], _, _)) => iter_overeager_cloned::check(cx, expr, recv, recv2, iter_overeager_cloned::Op::NeedlessMove(name, m_arg), false),
_ => {}
}
} else {
map_err_ignore::check(cx, expr, m_arg);
@ -4058,7 +4070,7 @@ impl Methods {
("next", []) => {
if let Some((name2, recv2, args2, _, _)) = method_call(recv) {
match (name2, args2) {
("cloned", []) => iter_overeager_cloned::check(cx, expr, recv, recv2, false, false),
("cloned", []) => iter_overeager_cloned::check(cx, expr, recv, recv2, iter_overeager_cloned::Op::LaterCloned, false),
("filter", [arg]) => filter_next::check(cx, expr, recv2, arg),
("filter_map", [arg]) => filter_map_next::check(cx, expr, recv2, arg, &self.msrv),
("iter", []) => iter_next_slice::check(cx, expr, recv2),
@ -4071,7 +4083,7 @@ impl Methods {
},
("nth", [n_arg]) => match method_call(recv) {
Some(("bytes", recv2, [], _, _)) => bytes_nth::check(cx, expr, recv2, n_arg),
Some(("cloned", recv2, [], _, _)) => iter_overeager_cloned::check(cx, expr, recv, recv2, false, false),
Some(("cloned", recv2, [], _, _)) => iter_overeager_cloned::check(cx, expr, recv, recv2, iter_overeager_cloned::Op::LaterCloned , false),
Some(("iter", recv2, [], _, _)) => iter_nth::check(cx, expr, recv2, recv, n_arg, false),
Some(("iter_mut", recv2, [], _, _)) => iter_nth::check(cx, expr, recv2, recv, n_arg, true),
_ => iter_nth_zero::check(cx, expr, recv, n_arg),
@ -4126,7 +4138,8 @@ impl Methods {
iter_skip_zero::check(cx, expr, arg);
if let Some(("cloned", recv2, [], _span2, _)) = method_call(recv) {
iter_overeager_cloned::check(cx, expr, recv, recv2, false, false);
iter_overeager_cloned::check(cx, expr, recv, recv2,
iter_overeager_cloned::Op::LaterCloned , false);
}
}
("sort", []) => {
@ -4152,7 +4165,8 @@ impl Methods {
("step_by", [arg]) => iterator_step_by_zero::check(cx, expr, arg),
("take", [_arg]) => {
if let Some(("cloned", recv2, [], _span2, _)) = method_call(recv) {
iter_overeager_cloned::check(cx, expr, recv, recv2, false, false);
iter_overeager_cloned::check(cx, expr, recv, recv2,
iter_overeager_cloned::Op::LaterCloned, false);
}
},
("take", []) => needless_option_take::check(cx, expr, recv),

19
clippy_lints/src/methods/or_fun_call.rs
View file

@ -65,11 +65,26 @@ pub(super) fn check<'tcx>(
};
let sugg = match (name, call_expr.is_some()) {
("unwrap_or", true) | ("unwrap_or_else", false) => "unwrap_or_default",
("or_insert", true) | ("or_insert_with", false) => "or_default",
("unwrap_or", true) | ("unwrap_or_else", false) => sym!(unwrap_or_default),
("or_insert", true) | ("or_insert_with", false) => sym!(or_default),
_ => return false,
};
let receiver_ty = cx.typeck_results().expr_ty_adjusted(receiver).peel_refs();
let has_suggested_method = receiver_ty.ty_adt_def().is_some_and(|adt_def| {
cx.tcx
.inherent_impls(adt_def.did())
.iter()
.flat_map(|impl_id| cx.tcx.associated_items(impl_id).filter_by_name_unhygienic(sugg))
.any(|assoc| {
assoc.fn_has_self_parameter
&& cx.tcx.fn_sig(assoc.def_id).skip_binder().inputs().skip_binder().len() == 1
})
});
if !has_suggested_method {
return false;
}
// needs to target Default::default in particular or be *::new and have a Default impl
// available
if (is_new(fun) && output_type_implements_default(fun))

3
clippy_lints/src/methods/unnecessary_sort_by.rs
View file

@ -6,7 +6,8 @@ use if_chain::if_chain;
use rustc_errors::Applicability;
use rustc_hir::{Closure, Expr, ExprKind, Mutability, Param, Pat, PatKind, Path, PathSegment, QPath};
use rustc_lint::LateContext;
use rustc_middle::ty::{self, GenericArgKind};
use rustc_middle::ty;
use rustc_middle::ty::GenericArgKind;
use rustc_span::sym;
use rustc_span::symbol::Ident;
use std::iter;