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Merge commit 'd7b5cbf065' into clippyup

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This commit is contained in:
flip1995 2022-06-16 17:39:06 +02:00
parent bd071bf5b2
commit f8f9d01c2a
199 changed files with 4158 additions and 1931 deletions
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40
clippy_lints/src/loops/for_loops_over_fallibles.rs
View file

@ -7,9 +7,22 @@ use rustc_lint::LateContext;
use rustc_span::symbol::sym;
/// Checks for `for` loops over `Option`s and `Result`s.
pub(super) fn check(cx: &LateContext<'_>, pat: &Pat<'_>, arg: &Expr<'_>) {
pub(super) fn check(cx: &LateContext<'_>, pat: &Pat<'_>, arg: &Expr<'_>, method_name: Option<&str>) {
let ty = cx.typeck_results().expr_ty(arg);
if is_type_diagnostic_item(cx, ty, sym::Option) {
let help_string = if let Some(method_name) = method_name {
format!(
"consider replacing `for {0} in {1}.{method_name}()` with `if let Some({0}) = {1}`",
snippet(cx, pat.span, "_"),
snippet(cx, arg.span, "_")
)
} else {
format!(
"consider replacing `for {0} in {1}` with `if let Some({0}) = {1}`",
snippet(cx, pat.span, "_"),
snippet(cx, arg.span, "_")
)
};
span_lint_and_help(
cx,
FOR_LOOPS_OVER_FALLIBLES,
@ -20,13 +33,22 @@ pub(super) fn check(cx: &LateContext<'_>, pat: &Pat<'_>, arg: &Expr<'_>) {
snippet(cx, arg.span, "_")
),
None,
&format!(
"consider replacing `for {0} in {1}` with `if let Some({0}) = {1}`",
snippet(cx, pat.span, "_"),
snippet(cx, arg.span, "_")
),
&help_string,
);
} else if is_type_diagnostic_item(cx, ty, sym::Result) {
let help_string = if let Some(method_name) = method_name {
format!(
"consider replacing `for {0} in {1}.{method_name}()` with `if let Ok({0}) = {1}`",
snippet(cx, pat.span, "_"),
snippet(cx, arg.span, "_")
)
} else {
format!(
"consider replacing `for {0} in {1}` with `if let Ok({0}) = {1}`",
snippet(cx, pat.span, "_"),
snippet(cx, arg.span, "_")
)
};
span_lint_and_help(
cx,
FOR_LOOPS_OVER_FALLIBLES,
@ -37,11 +59,7 @@ pub(super) fn check(cx: &LateContext<'_>, pat: &Pat<'_>, arg: &Expr<'_>) {
snippet(cx, arg.span, "_")
),
None,
&format!(
"consider replacing `for {0} in {1}` with `if let Ok({0}) = {1}`",
snippet(cx, pat.span, "_"),
snippet(cx, arg.span, "_")
),
&help_string,
);
}
}

34
clippy_lints/src/loops/mod.rs
View file

@ -42,7 +42,8 @@ declare_clippy_lint! {
/// dst[i + 64] = src[i];
/// }
/// ```
/// Could be written as:
///
/// Use instead:
/// ```rust
/// # let src = vec![1];
/// # let mut dst = vec![0; 65];
@ -70,7 +71,8 @@ declare_clippy_lint! {
/// println!("{}", vec[i]);
/// }
/// ```
/// Could be written as:
///
/// Use instead:
/// ```rust
/// let vec = vec!['a', 'b', 'c'];
/// for i in vec {
@ -103,7 +105,8 @@ declare_clippy_lint! {
/// // ..
/// }
/// ```
/// can be rewritten to
///
/// Use instead:
/// ```rust
/// # let y = vec![1];
/// for x in &y {
@ -188,6 +191,10 @@ declare_clippy_lint! {
/// for x in &res {
/// // ..
/// }
///
/// for x in res.iter() {
/// // ..
/// }
/// ```
///
/// Use instead:
@ -282,7 +289,8 @@ declare_clippy_lint! {
/// i += 1;
/// }
/// ```
/// Could be written as
///
/// Use instead:
/// ```rust
/// # let v = vec![1];
/// # fn bar(bar: usize, baz: usize) {}
@ -469,7 +477,7 @@ declare_clippy_lint! {
///
/// ### Why is this bad?
/// This kind of operation can be expressed more succinctly with
/// `vec![item;SIZE]` or `vec.resize(NEW_SIZE, item)` and using these alternatives may also
/// `vec![item; SIZE]` or `vec.resize(NEW_SIZE, item)` and using these alternatives may also
/// have better performance.
///
/// ### Example
@ -484,7 +492,8 @@ declare_clippy_lint! {
/// vec.push(item2);
/// }
/// ```
/// could be written as
///
/// Use instead:
/// ```rust
/// let item1 = 2;
/// let item2 = 3;
@ -512,7 +521,8 @@ declare_clippy_lint! {
/// println!("{}", item);
/// }
/// ```
/// could be written as
///
/// Use instead:
/// ```rust
/// let item1 = 2;
/// let item = &item1;
@ -586,7 +596,7 @@ declare_clippy_lint! {
/// std::hint::spin_loop()
/// }
/// ```
#[clippy::version = "1.59.0"]
#[clippy::version = "1.61.0"]
pub MISSING_SPIN_LOOP,
perf,
"An empty busy waiting loop"
@ -695,10 +705,14 @@ fn check_for_loop_arg(cx: &LateContext<'_>, pat: &Pat<'_>, arg: &Expr<'_>) {
let method_name = method.ident.as_str();
// check for looping over x.iter() or x.iter_mut(), could use &x or &mut x
match method_name {
"iter" | "iter_mut" => explicit_iter_loop::check(cx, self_arg, arg, method_name),
"iter" | "iter_mut" => {
explicit_iter_loop::check(cx, self_arg, arg, method_name);
for_loops_over_fallibles::check(cx, pat, self_arg, Some(method_name));
},
"into_iter" => {
explicit_iter_loop::check(cx, self_arg, arg, method_name);
explicit_into_iter_loop::check(cx, self_arg, arg);
for_loops_over_fallibles::check(cx, pat, self_arg, Some(method_name));
},
"next" => {
next_loop_linted = iter_next_loop::check(cx, arg);
@ -708,6 +722,6 @@ fn check_for_loop_arg(cx: &LateContext<'_>, pat: &Pat<'_>, arg: &Expr<'_>) {
}
if !next_loop_linted {
for_loops_over_fallibles::check(cx, pat, arg);
for_loops_over_fallibles::check(cx, pat, arg, None);
}
}

12
clippy_lints/src/loops/never_loop.rs
View file

@ -117,13 +117,20 @@ fn never_loop_expr(expr: &Expr<'_>, main_loop_id: HirId) -> NeverLoopResult {
| ExprKind::Type(e, _)
| ExprKind::Field(e, _)
| ExprKind::AddrOf(_, _, e)
| ExprKind::Struct(_, _, Some(e))
| ExprKind::Repeat(e, _)
| ExprKind::DropTemps(e) => never_loop_expr(e, main_loop_id),
ExprKind::Let(let_expr) => never_loop_expr(let_expr.init, main_loop_id),
ExprKind::Array(es) | ExprKind::MethodCall(_, es, _) | ExprKind::Tup(es) => {
never_loop_expr_all(&mut es.iter(), main_loop_id)
},
ExprKind::Struct(_, fields, base) => {
let fields = never_loop_expr_all(&mut fields.iter().map(|f| f.expr), main_loop_id);
if let Some(base) = base {
combine_both(fields, never_loop_expr(base, main_loop_id))
} else {
fields
}
},
ExprKind::Call(e, es) => never_loop_expr_all(&mut once(e).chain(es.iter()), main_loop_id),
ExprKind::Binary(_, e1, e2)
| ExprKind::Assign(e1, e2, _)
@ -180,8 +187,7 @@ fn never_loop_expr(expr: &Expr<'_>, main_loop_id: HirId) -> NeverLoopResult {
| InlineAsmOperand::SymStatic { .. } => NeverLoopResult::Otherwise,
})
.fold(NeverLoopResult::Otherwise, combine_both),
ExprKind::Struct(_, _, None)
| ExprKind::Yield(_, _)
ExprKind::Yield(_, _)
| ExprKind::Closure { .. }
| ExprKind::Path(_)
| ExprKind::ConstBlock(_)