Fix rust 1.67 lints (#2567)

This Pull Request changes the following:

- Fix rust 1.67 lints

boa_ast/src/expression/literal/array.rs

@@ -60,9 +60,7 @@ impl ArrayLiteral {
 
         let mut bindings = Vec::new();
         for (i, expr) in self.arr.iter().enumerate() {
-            let expr = if let Some(expr) = expr {
-                expr
-            } else {
+            let Some(expr) = expr else {
                 bindings.push(ArrayPatternElement::Elision);
                 continue;
             };

boa_ast/src/lib.rs

@@ -91,8 +91,7 @@
 #![allow(
     clippy::module_name_repetitions,
     clippy::too_many_lines,
-    clippy::option_if_let_else,
-    clippy::use_self
+    clippy::option_if_let_else
 )]
 
 mod position;

boa_engine/src/builtins/date/mod.rs

@@ -207,7 +207,7 @@ impl Date {
             // 3. If numberOfArgs = 0, then
             [] => {
                 // a. Let dv be the time value (UTC) identifying the current time.
-                Date::default()
+                Self::default()
             }
             // 4. Else if numberOfArgs = 1, then
             // a. Let value be values[0].
@@ -229,7 +229,7 @@ impl Date {
                             // 1. Assert: The next step never returns an abrupt completion because v is a String.
                             // 2. Let tv be the result of parsing v as a date, in exactly the same manner as for the
                             // parse method (21.4.3.2).
-                            Date(
+                            Self(
                                 str.to_std_string()
                                     .ok()
                                     .and_then(|s| {
@@ -242,7 +242,7 @@ impl Date {
                         v => {
                             // Directly convert to integer
                             // 1. Let tv be ? ToNumber(v).
-                            Date(
+                            Self(
                                 v.to_integer_or_nan(context)?
                                     .as_integer()
                                     // d. Let dv be TimeClip(tv).
@@ -256,7 +256,7 @@ impl Date {
             // 5. Else,
             _ => {
                 // Separating this into its own function to simplify the logic.
-                Date(
+                Self(
                     Self::construct_date(args, context)?
                         .and_then(|dt| Local.from_local_datetime(&dt).earliest())
                         .map(|dt| dt.naive_utc()),
@@ -717,7 +717,7 @@ impl Date {
         );
 
         // 7. Set the [[DateValue]] internal slot of this Date object to u.
-        *t = Date(datetime);
+        *t = Self(datetime);
 
         // 8. Return u.
         Ok(t.as_value())
@@ -748,7 +748,7 @@ impl Date {
                     .earliest()
                     .as_ref()
                     .map(DateTime::naive_utc) else {
-                        *t = Date(None);
+                        *t = Self(None);
                         return Ok(t.as_value())
                     };
                 datetime
@@ -785,7 +785,7 @@ impl Date {
         );
 
         // 8. Set the [[DateValue]] internal slot of this Date object to u.
-        *t = Date(datetime);
+        *t = Self(datetime);
 
         // 9. Return u.
         Ok(t.as_value())
@@ -851,7 +851,7 @@ impl Date {
         );
 
         // 13. Set the [[DateValue]] internal slot of this Date object to u.
-        *t = Date(datetime);
+        *t = Self(datetime);
 
         // 14. Return u.
         Ok(t.as_value())
@@ -892,7 +892,7 @@ impl Date {
         );
 
         // 7. Set the [[DateValue]] internal slot of this Date object to u.
-        *t = Date(datetime);
+        *t = Self(datetime);
 
         // 8. Return u.
         Ok(t.as_value())
@@ -948,7 +948,7 @@ impl Date {
         );
 
         // 11. Set the [[DateValue]] internal slot of this Date object to u.
-        *t = Date(datetime);
+        *t = Self(datetime);
 
         // 12. Return u.
         Ok(t.as_value())
@@ -997,7 +997,7 @@ impl Date {
         );
 
         // 9. Set the [[DateValue]] internal slot of this Date object to u.
-        *t = Date(datetime);
+        *t = Self(datetime);
 
         // 10. Return u.
         Ok(t.as_value())
@@ -1045,7 +1045,7 @@ impl Date {
         );
 
         // 9. Set the [[DateValue]] internal slot of this Date object to u.
-        *t = Date(datetime);
+        *t = Self(datetime);
 
         // 10. Return u.
         Ok(t.as_value())
@@ -1085,14 +1085,14 @@ impl Date {
                 .as_ref()
                 .map(DateTime::naive_utc)
         }) else {
-            *t = Date(None);
+            *t = Self(None);
             return Ok(t.as_value());
         };
 
         // 4. If y is NaN, then
         let Some(mut year) = year.as_integer() else {
             // a. Set the [[DateValue]] internal slot of this Date object to NaN.
-            *t = Date(None);
+            *t = Self(None);
 
             // b. Return NaN.
             return Ok(t.as_value());
@@ -1116,7 +1116,7 @@ impl Date {
         );
 
         // 10. Set the [[DateValue]] internal slot of this Date object to TimeClip(date).
-        *t = Date(datetime);
+        *t = Self(datetime);
 
         // 11. Return the value of the [[DateValue]] internal slot of this Date object.
         Ok(t.as_value())
@@ -1150,7 +1150,7 @@ impl Date {
             .and_then(NaiveDateTime::from_timestamp_millis);
 
         // 4. Set the [[DateValue]] internal slot of this Date object to v.
-        *t = Date(timestamp);
+        *t = Self(timestamp);
 
         // 5. Return v.
         Ok(t.as_value())
@@ -1410,7 +1410,7 @@ impl Date {
         _context: &mut Context<'_>,
     ) -> JsResult<JsValue> {
         // 1. Return ? thisTimeValue(this value).
-        Ok(Date(this_time_value(this)?).as_value())
+        Ok(Self(this_time_value(this)?).as_value())
     }
 
     /// [`Date.prototype [ @@toPrimitive ] ( hint )`][spec].

boa_engine/src/builtins/function/mod.rs

@@ -781,7 +781,9 @@ impl BuiltInFunctionObject {
         let target_name = target.get("name", context)?;
 
         // 9. If Type(targetName) is not String, set targetName to the empty String.
-        let target_name = target_name.as_string().map_or(js_string!(), Clone::clone);
+        let target_name = target_name
+            .as_string()
+            .map_or_else(JsString::default, Clone::clone);
 
         // 10. Perform SetFunctionName(F, targetName, "bound").
         set_function_name(&f, &target_name.into(), Some(js_string!("bound")), context);

boa_engine/src/builtins/intl/collator/mod.rs

@@ -343,7 +343,7 @@ impl Collator {
             get_prototype_from_constructor(new_target, StandardConstructors::collator, context)?;
         let collator = JsObject::from_proto_and_data(
             prototype,
-            ObjectData::collator(Collator {
+            ObjectData::collator(Self {
                 locale,
                 collation,
                 numeric,

boa_engine/src/builtins/intl/collator/options.rs

@@ -16,10 +16,10 @@ impl Sensitivity {
     /// Converts the sensitivity option to the equivalent ICU4X collator options.
     pub(crate) const fn to_collator_options(self) -> (Strength, CaseLevel) {
         match self {
-            Sensitivity::Base => (Strength::Primary, CaseLevel::Off),
-            Sensitivity::Accent => (Strength::Secondary, CaseLevel::Off),
-            Sensitivity::Case => (Strength::Primary, CaseLevel::On),
-            Sensitivity::Variant => (Strength::Tertiary, CaseLevel::On),
+            Self::Base => (Strength::Primary, CaseLevel::Off),
+            Self::Accent => (Strength::Secondary, CaseLevel::Off),
+            Self::Case => (Strength::Primary, CaseLevel::On),
+            Self::Variant => (Strength::Tertiary, CaseLevel::On),
         }
     }
 }

boa_engine/src/builtins/intl/date_time_format.rs

@@ -27,10 +27,10 @@ use super::options::OptionType;
 impl OptionType for HourCycle {
     fn from_value(value: JsValue, context: &mut Context<'_>) -> JsResult<Self> {
         match value.to_string(context)?.to_std_string_escaped().as_str() {
-            "h11" => Ok(HourCycle::H11),
-            "h12" => Ok(HourCycle::H12),
-            "h23" => Ok(HourCycle::H23),
-            "h24" => Ok(HourCycle::H24),
+            "h11" => Ok(Self::H11),
+            "h12" => Ok(Self::H12),
+            "h23" => Ok(Self::H23),
+            "h24" => Ok(Self::H24),
             _ => Err(JsNativeError::range()
                 .with_message("provided string was not `h11`, `h12`, `h23` or `h24`")
                 .into()),

boa_engine/src/builtins/intl/list_format/mod.rs

@@ -148,7 +148,7 @@ impl ListFormat {
             get_prototype_from_constructor(new_target, StandardConstructors::list_format, context)?;
         let list_format = JsObject::from_proto_and_data(
             prototype,
-            ObjectData::list_format(ListFormat {
+            ObjectData::list_format(Self {
                 formatter: context
                     .icu()
                     .provider()
@@ -249,15 +249,15 @@ impl ListFormat {
         impl Part {
             const fn typ(&self) -> &'static str {
                 match self {
-                    Part::Literal(_) => "literal",
-                    Part::Element(_) => "element",
+                    Self::Literal(_) => "literal",
+                    Self::Element(_) => "element",
                 }
             }
 
             #[allow(clippy::missing_const_for_fn)]
             fn value(self) -> String {
                 match self {
-                    Part::Literal(s) | Part::Element(s) => s,
+                    Self::Literal(s) | Self::Element(s) => s,
                 }
             }
         }
@@ -276,7 +276,7 @@ impl ListFormat {
         }
 
         impl PartsWrite for WriteString {
-            type SubPartsWrite = WriteString;
+            type SubPartsWrite = Self;
 
             fn with_part(
                 &mut self,

boa_engine/src/builtins/intl/locale/options.rs

@@ -7,7 +7,7 @@ impl OptionType for Value {
         let val = value
             .to_string(context)?
             .to_std_string_escaped()
-            .parse::<Value>()
+            .parse::<Self>()
             .map_err(|e| JsNativeError::range().with_message(e.to_string()))?;
 
         if val.as_tinystr_slice().is_empty() {

boa_engine/src/builtins/intl/options.rs

@@ -94,9 +94,9 @@ impl OptionTypeParsable for LocaleMatcher {}
 impl OptionType for CaseFirst {
     fn from_value(value: JsValue, context: &mut Context<'_>) -> JsResult<Self> {
         match value.to_string(context)?.to_std_string_escaped().as_str() {
-            "upper" => Ok(CaseFirst::UpperFirst),
-            "lower" => Ok(CaseFirst::LowerFirst),
-            "false" => Ok(CaseFirst::Off),
+            "upper" => Ok(Self::UpperFirst),
+            "lower" => Ok(Self::LowerFirst),
+            "false" => Ok(Self::Off),
             _ => Err(JsNativeError::range()
                 .with_message("provided string was not `upper`, `lower` or `false`")
                 .into()),

boa_engine/src/builtins/math/tests.rs

@@ -93,7 +93,7 @@ fn asinh() {
     let a = forward_val(&mut context, "a").unwrap();
     let b = forward_val(&mut context, "b").unwrap();
 
-    assert_eq!(a.to_number(&mut context).unwrap(), 0.881_373_587_019_542_9);
+    assert_eq!(a.to_number(&mut context).unwrap(), 0.881_373_587_019_543);
     assert_eq!(b.to_number(&mut context).unwrap(), 0_f64);
 }
 

boa_engine/src/builtins/object/mod.rs

@@ -203,9 +203,8 @@ impl Object {
         };
 
         // 3. If Type(O) is not Object, return undefined.
-        let object = match this {
-            JsValue::Object(object) => object,
-            _ => return Ok(JsValue::undefined()),
+        let JsValue::Object(object) = this else {
+            return Ok(JsValue::undefined());
         };
 
         // 4. Let status be ? O.[[SetPrototypeOf]](proto).
@@ -517,9 +516,7 @@ impl Object {
         context: &mut Context<'_>,
     ) -> JsValue {
         // 1. If Desc is undefined, return undefined.
-        let desc = if let Some(desc) = desc {
-            desc
-        } else {
+        let Some(desc)= desc else {
             return JsValue::undefined();
         };
 
@@ -892,9 +889,8 @@ impl Object {
         args: &[JsValue],
         context: &mut Context<'_>,
     ) -> JsResult<JsValue> {
-        let key = match args.get(0) {
-            None => return Ok(JsValue::new(false)),
-            Some(key) => key,
+        let Some(key) = args.get(0) else {
+            return Ok(JsValue::new(false));
         };
 
         let key = key.to_property_key(context)?;

boa_engine/src/builtins/promise/mod.rs

@@ -235,7 +235,7 @@ impl PromiseCapability {
 
         // 9. Set promiseCapability.[[Promise]] to promise.
         // 10. Return promiseCapability.
-        Ok(PromiseCapability {
+        Ok(Self {
             promise,
             resolve,
             reject,

boa_engine/src/builtins/regexp/mod.rs

@@ -609,9 +609,7 @@ impl RegExp {
     ) -> JsResult<JsValue> {
         // 1. Let R be the this value.
         // 2. If Type(R) is not Object, throw a TypeError exception.
-        let object = if let Some(object) = this.as_object() {
-            object
-        } else {
+        let Some(object) = this.as_object() else {
             return Err(JsNativeError::typ()
                 .with_message("RegExp.prototype.source method called on incompatible value")
                 .into());

boa_engine/src/builtins/string/mod.rs

@@ -2355,9 +2355,8 @@ pub(crate) fn get_substitution(
 /// [spec]: https://tc39.es/ecma262/#sec-isregexp
 fn is_reg_exp(argument: &JsValue, context: &mut Context<'_>) -> JsResult<bool> {
     // 1. If Type(argument) is not Object, return false.
-    let argument = match argument {
-        JsValue::Object(o) => o,
-        _ => return Ok(false),
+    let JsValue::Object(argument) = argument else {
+        return Ok(false);
     };
 
     is_reg_exp_object(argument, context)

boa_engine/src/builtins/weak/weak_ref.rs

@@ -35,7 +35,7 @@ impl BuiltIn for WeakRef {
         let _timer = Profiler::global().start_event(Self::NAME, "init");
         ConstructorBuilder::with_standard_constructor(
             context,
-            WeakRef::constructor,
+            Self::constructor,
             context.intrinsics().constructors().weak_ref().clone(),
         )
         .name(Self::NAME)
@@ -45,7 +45,7 @@ impl BuiltIn for WeakRef {
             "WeakRef",
             Attribute::CONFIGURABLE,
         )
-        .method(WeakRef::deref, "deref", 0)
+        .method(Self::deref, "deref", 0)
         .build()
         .conv::<JsValue>()
         .pipe(Some)

boa_engine/src/bytecompiler/jump_control.rs

@@ -44,7 +44,7 @@ bitflags! {
 
 impl Default for JumpControlInfoFlags {
     fn default() -> Self {
-        JumpControlInfoFlags::empty()
+        Self::empty()
     }
 }
 

boa_engine/src/job.rs

@@ -107,7 +107,7 @@ impl Debug for JobCallback {
 impl JobCallback {
     /// Creates a new `JobCallback`.
     pub fn new<T: Any + Trace>(callback: JsFunction, host_defined: T) -> Self {
-        JobCallback {
+        Self {
             callback,
             host_defined: Box::new(host_defined),
         }

boa_engine/src/lib.rs

@@ -95,7 +95,7 @@
     clippy::missing_errors_doc,
     clippy::let_unit_value,
     clippy::option_if_let_else,
-    // Currently derive macros are linted. Should be fixed in 1.66. See https://github.com/rust-lang/rust-clippy/pull/9454
+    // Currently lints in places where `Self` would have a type parameter.
     clippy::use_self,
 
     // It may be worth to look if we can fix the issues highlighted by these lints.
@@ -223,18 +223,14 @@ pub(crate) fn check_output(actions: &[TestAction]) {
                 assert_eq!(
                     &forward(&mut context, case),
                     expected,
-                    "Test case {} ('{}')",
-                    i,
-                    case
+                    "Test case {i} ('{case}')"
                 );
                 i += 1;
             }
             TestAction::TestStartsWith(case, expected) => {
                 assert!(
                     &forward(&mut context, case).starts_with(expected),
-                    "Test case {} ('{}')",
-                    i,
-                    case
+                    "Test case {i} ('{case}')",
                 );
                 i += 1;
             }

boa_engine/src/object/internal_methods/array.rs

@@ -111,12 +111,9 @@ fn array_set_length(
     context: &mut Context<'_>,
 ) -> JsResult<bool> {
     // 1. If Desc.[[Value]] is absent, then
-    let new_len_val = match desc.value() {
-        Some(value) => value,
-        _ => {
-            // a. Return OrdinaryDefineOwnProperty(A, "length", Desc).
-            return super::ordinary_define_own_property(obj, "length".into(), desc, context);
-        }
+    let Some(new_len_val) = desc.value() else {
+        // a. Return OrdinaryDefineOwnProperty(A, "length", Desc).
+        return super::ordinary_define_own_property(obj, "length".into(), desc, context);
     };
 
     // 3. Let newLen be ? ToUint32(Desc.[[Value]]).

boa_engine/src/object/internal_methods/mod.rs

@@ -608,10 +608,9 @@ pub(crate) fn ordinary_set(
             return Ok(false);
         }
 
-        let receiver = match receiver.as_object() {
-            Some(obj) => obj,
-            // b. If Type(Receiver) is not Object, return false.
-            _ => return Ok(false),
+        // b. If Type(Receiver) is not Object, return false.
+        let Some(receiver) = receiver.as_object() else {
+            return Ok(false);
         };
 
         // c. Let existingDescriptor be ? Receiver.[[GetOwnProperty]](P).

boa_engine/src/object/operations.rs

@@ -938,7 +938,7 @@ impl JsObject {
     /// [spec]: https://tc39.es/ecma262/#sec-initializeinstanceelements
     pub(crate) fn initialize_instance_elements(
         &self,
-        constructor: &JsObject,
+        constructor: &Self,
         context: &mut Context<'_>,
     ) -> JsResult<()> {
         let constructor_borrow = constructor.borrow();
@@ -1110,10 +1110,10 @@ impl JsValue {
     #[inline]
     pub(crate) fn call(
         &self,
-        this: &JsValue,
-        args: &[JsValue],
+        this: &Self,
+        args: &[Self],
         context: &mut Context<'_>,
-    ) -> JsResult<JsValue> {
+    ) -> JsResult<Self> {
         self.as_callable()
             .ok_or_else(|| {
                 JsNativeError::typ().with_message(format!(

boa_engine/src/string/mod.rs

@@ -781,7 +781,7 @@ impl FromStr for JsString {
     type Err = Infallible;
 
     fn from_str(s: &str) -> Result<Self, Self::Err> {
-        Ok(JsString::from(s))
+        Ok(Self::from(s))
     }
 }
 

boa_engine/src/symbol.rs

@@ -80,19 +80,19 @@ enum WellKnown {
 impl WellKnown {
     const fn description(self) -> JsString {
         match self {
-            WellKnown::AsyncIterator => StaticJsStrings::symbol_async_iterator(),
-            WellKnown::HasInstance => StaticJsStrings::symbol_has_instance(),
-            WellKnown::IsConcatSpreadable => StaticJsStrings::symbol_is_concat_spreadable(),
-            WellKnown::Iterator => StaticJsStrings::symbol_iterator(),
-            WellKnown::Match => StaticJsStrings::symbol_match(),
-            WellKnown::MatchAll => StaticJsStrings::symbol_match_all(),
-            WellKnown::Replace => StaticJsStrings::symbol_replace(),
-            WellKnown::Search => StaticJsStrings::symbol_search(),
-            WellKnown::Species => StaticJsStrings::symbol_species(),
-            WellKnown::Split => StaticJsStrings::symbol_split(),
-            WellKnown::ToPrimitive => StaticJsStrings::symbol_to_primitive(),
-            WellKnown::ToStringTag => StaticJsStrings::symbol_to_string_tag(),
-            WellKnown::Unscopables => StaticJsStrings::symbol_unscopables(),
+            Self::AsyncIterator => StaticJsStrings::symbol_async_iterator(),
+            Self::HasInstance => StaticJsStrings::symbol_has_instance(),
+            Self::IsConcatSpreadable => StaticJsStrings::symbol_is_concat_spreadable(),
+            Self::Iterator => StaticJsStrings::symbol_iterator(),
+            Self::Match => StaticJsStrings::symbol_match(),
+            Self::MatchAll => StaticJsStrings::symbol_match_all(),
+            Self::Replace => StaticJsStrings::symbol_replace(),
+            Self::Search => StaticJsStrings::symbol_search(),
+            Self::Species => StaticJsStrings::symbol_species(),
+            Self::Split => StaticJsStrings::symbol_split(),
+            Self::ToPrimitive => StaticJsStrings::symbol_to_primitive(),
+            Self::ToStringTag => StaticJsStrings::symbol_to_string_tag(),
+            Self::Unscopables => StaticJsStrings::symbol_unscopables(),
         }
     }
 

boa_engine/src/tagged.rs

@@ -50,7 +50,7 @@ impl<T> Tagged<T> {
         debug_assert!(std::mem::align_of::<T>() >= 2);
         let addr = (tag << 1) | 1;
         // SAFETY: `addr` is never zero, since we always set its LSB to 1
-        unsafe { Tagged(NonNull::new_unchecked(sptr::invalid_mut(addr))) }
+        unsafe { Self(NonNull::new_unchecked(sptr::invalid_mut(addr))) }
     }
 
     /// Creates a new `Tagged` pointer from a raw pointer.
@@ -65,7 +65,7 @@ impl<T> Tagged<T> {
     pub(crate) const unsafe fn from_ptr(ptr: *mut T) -> Tagged<T> {
         debug_assert!(std::mem::align_of::<T>() >= 2);
         // SAFETY: the caller must ensure the invariants hold.
-        unsafe { Tagged(NonNull::new_unchecked(ptr)) }
+        unsafe { Self(NonNull::new_unchecked(ptr)) }
     }
 
     /// Creates a new `Tagged` pointer from a `NonNull` pointer.
@@ -75,7 +75,7 @@ impl<T> Tagged<T> {
     /// - `T` must have an alignment of at least 2.
     pub(crate) const fn from_non_null(ptr: NonNull<T>) -> Tagged<T> {
         debug_assert!(std::mem::align_of::<T>() >= 2);
-        Tagged(ptr)
+        Self(ptr)
     }
 
     /// Unwraps the `Tagged` pointer.

boa_engine/src/value/integer.rs

@@ -121,7 +121,6 @@ impl IntegerOrNan {
 
 impl From<IntegerOrInfinity> for IntegerOrNan {
     fn from(ior: IntegerOrInfinity) -> Self {
-        ior.as_integer()
-            .map_or(IntegerOrNan::Nan, IntegerOrNan::Integer)
+        ior.as_integer().map_or(Self::Nan, IntegerOrNan::Integer)
     }
 }

boa_engine/src/vm/flowgraph/color.rs

@@ -77,13 +77,13 @@ impl Color {
 impl Display for Color {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         match self {
-            Color::None => f.write_str(""),
-            Color::Red => f.write_str("red"),
-            Color::Green => f.write_str("green"),
-            Color::Blue => f.write_str("blue"),
-            Color::Yellow => f.write_str("yellow"),
-            Color::Purple => f.write_str("purple"),
-            Color::Rgb { r, g, b } => write!(f, "#{r:02X}{b:02X}{g:02X}"),
+            Self::None => f.write_str(""),
+            Self::Red => f.write_str("red"),
+            Self::Green => f.write_str("green"),
+            Self::Blue => f.write_str("blue"),
+            Self::Yellow => f.write_str("yellow"),
+            Self::Purple => f.write_str("purple"),
+            Self::Rgb { r, g, b } => write!(f, "#{r:02X}{b:02X}{g:02X}"),
         }
     }
 }

boa_engine/src/vm/flowgraph/graph.rs

@@ -83,8 +83,8 @@ impl SubGraph {
 
     /// Create a subgraph in this subgraph.
     #[inline]
-    pub fn subgraph(&mut self, label: String) -> &mut SubGraph {
-        self.subgraphs.push(SubGraph::new(label));
+    pub fn subgraph(&mut self, label: String) -> &mut Self {
+        self.subgraphs.push(Self::new(label));
         let result = self
             .subgraphs
             .last_mut()
@@ -248,7 +248,7 @@ impl Graph {
     #[inline]
     #[must_use]
     pub fn new(direction: Direction) -> Self {
-        Graph {
+        Self {
             subgraphs: Vec::default(),
             direction,
         }

boa_examples/src/bin/loadfile.rs

@@ -26,6 +26,6 @@ fn main() {
                 }
             };
         }
-        Err(msg) => eprintln!("Error: {}", msg),
+        Err(msg) => eprintln!("Error: {msg}"),
     }
 }

boa_examples/src/bin/modulehandler.rs

@@ -45,7 +45,7 @@ fn require(_: &JsValue, args: &[JsValue], ctx: &mut Context<'_>) -> JsResult<JsV
         .to_std_string_escaped();
 
     // Read the module source file
-    println!("Loading: {}", libfile);
+    println!("Loading: {libfile}");
     let buffer = read_to_string(libfile);
     if let Err(..) = buffer {
         println!("Error: {}", buffer.unwrap_err());

boa_gc/src/cell.rs

@@ -12,7 +12,7 @@ use std::{
 /// `BorrowFlag` represent the internal state of a `GcCell` and
 /// keeps track of the amount of current borrows.
 #[derive(Copy, Clone)]
-pub(crate) struct BorrowFlag(usize);
+struct BorrowFlag(usize);
 
 /// `BorrowState` represents the various states of a `BorrowFlag`
 ///
@@ -20,7 +20,7 @@ pub(crate) struct BorrowFlag(usize);
 ///  - Writing: the value is currently being written/borrowed mutably.
 ///  - Unused: the value is currently unrooted.
 #[derive(Copy, Clone, Debug, Eq, PartialEq)]
-pub(crate) enum BorrowState {
+enum BorrowState {
     Reading,
     Writing,
     Unused,
@@ -31,11 +31,11 @@ const WRITING: usize = !1;
 const UNUSED: usize = 0;
 
 /// The base borrowflag init is rooted, and has no outstanding borrows.
-pub(crate) const BORROWFLAG_INIT: BorrowFlag = BorrowFlag(ROOT);
+const BORROWFLAG_INIT: BorrowFlag = BorrowFlag(ROOT);
 
 impl BorrowFlag {
     /// Check the current `BorrowState` of `BorrowFlag`.
-    pub(crate) const fn borrowed(self) -> BorrowState {
+    const fn borrowed(self) -> BorrowState {
         match self.0 & !ROOT {
             UNUSED => BorrowState::Unused,
             WRITING => BorrowState::Writing,
@@ -44,18 +44,18 @@ impl BorrowFlag {
     }
 
     /// Check whether the borrow bit is flagged.
-    pub(crate) const fn rooted(self) -> bool {
+    const fn rooted(self) -> bool {
         self.0 & ROOT > 0
     }
 
     /// Set the `BorrowFlag`'s state to writing.
-    pub(crate) const fn set_writing(self) -> Self {
+    const fn set_writing(self) -> Self {
         // Set every bit other than the root bit, which is preserved
         Self(self.0 | WRITING)
     }
 
     /// Remove the root flag on `BorrowFlag`
-    pub(crate) const fn set_unused(self) -> Self {
+    const fn set_unused(self) -> Self {
         // Clear every bit other than the root bit, which is preserved
         Self(self.0 & ROOT)
     }
@@ -65,7 +65,7 @@ impl BorrowFlag {
     /// # Panic
     ///  - This method will panic if the current `BorrowState` is writing.
     ///  - This method will panic after incrementing if the borrow count overflows.
-    pub(crate) fn add_reading(self) -> Self {
+    fn add_reading(self) -> Self {
         assert!(self.borrowed() != BorrowState::Writing);
         // Add 1 to the integer starting at the second binary digit. As our
         // borrowstate is not writing, we know that overflow cannot happen, so
@@ -86,7 +86,7 @@ impl BorrowFlag {
     ///
     /// # Panic
     ///  - This method will panic if the current `BorrowState` is not reading.
-    pub(crate) fn sub_reading(self) -> Self {
+    fn sub_reading(self) -> Self {
         assert!(self.borrowed() == BorrowState::Reading);
         // Subtract 1 from the integer starting at the second binary digit. As
         // our borrowstate is not writing or unused, we know that overflow or
@@ -98,7 +98,7 @@ impl BorrowFlag {
     }
 
     /// Set the root flag on the `BorrowFlag`.
-    pub(crate) fn set_rooted(self, rooted: bool) -> Self {
+    fn set_rooted(self, rooted: bool) -> Self {
         // Preserve the non-root bits
         Self((self.0 & !ROOT) | (usize::from(rooted)))
     }
@@ -118,8 +118,8 @@ impl Debug for BorrowFlag {
 ///
 /// This object is a `RefCell` that can be used inside of a `Gc<T>`.
 pub struct GcRefCell<T: ?Sized + 'static> {
-    pub(crate) flags: Cell<BorrowFlag>,
-    pub(crate) cell: UnsafeCell<T>,
+    flags: Cell<BorrowFlag>,
+    cell: UnsafeCell<T>,
 }
 
 impl<T: Trace> GcRefCell<T> {
@@ -296,8 +296,8 @@ unsafe impl<T: Trace + ?Sized> Trace for GcRefCell<T> {
 
 /// A wrapper type for an immutably borrowed value from a `GcCell<T>`.
 pub struct GcRef<'a, T: ?Sized + 'static> {
-    pub(crate) flags: &'a Cell<BorrowFlag>,
-    pub(crate) value: &'a T,
+    flags: &'a Cell<BorrowFlag>,
+    value: &'a T,
 }
 
 impl<'a, T: ?Sized> GcRef<'a, T> {

boa_parser/src/parser/cursor/buffered_lexer/mod.rs

@@ -215,8 +215,7 @@ where
     ) -> ParseResult<Option<&Token>> {
         assert!(
             skip_n <= MAX_PEEK_SKIP,
-            "you cannot skip more than {} elements",
-            MAX_PEEK_SKIP
+            "you cannot skip more than {MAX_PEEK_SKIP} elements",
         );
 
         let mut read_index = self.read_index;

boa_parser/src/parser/expression/assignment/arrow_function.rs

@@ -81,8 +81,8 @@ where
         let _timer = Profiler::global().start_event("ArrowFunction", "Parsing");
         let next_token = cursor.peek(0, interner).or_abrupt()?;
 
-        let (params, params_start_position) = if let TokenKind::Punctuator(Punctuator::OpenParen) =
-            &next_token.kind()
+        let (params, params_start_position) = if next_token.kind()
+            == &TokenKind::Punctuator(Punctuator::OpenParen)
         {
             // CoverParenthesizedExpressionAndArrowParameterList
             let params_start_position = cursor

boa_parser/src/parser/expression/assignment/async_arrow_function.rs

@@ -77,8 +77,8 @@ where
         cursor.peek_expect_no_lineterminator(0, "async arrow function", interner)?;
 
         let next_token = cursor.peek(0, interner).or_abrupt()?;
-        let (params, params_start_position) = if let TokenKind::Punctuator(Punctuator::OpenParen) =
-            &next_token.kind()
+        let (params, params_start_position) = if next_token.kind()
+            == &TokenKind::Punctuator(Punctuator::OpenParen)
         {
             let params_start_position = cursor
                 .expect(Punctuator::OpenParen, "async arrow function", interner)?

boa_parser/src/parser/expression/assignment/exponentiation.rs

@@ -88,7 +88,7 @@ where
         let lhs = UpdateExpression::new(self.name, self.allow_yield, self.allow_await)
             .parse(cursor, interner)?;
         if let Some(tok) = cursor.peek(0, interner)? {
-            if let TokenKind::Punctuator(Punctuator::Exp) = tok.kind() {
+            if tok.kind() == &TokenKind::Punctuator(Punctuator::Exp) {
                 cursor.advance(interner);
                 return Ok(Binary::new(
                     ArithmeticOp::Exp.into(),

boa_parser/src/parser/expression/primary/object_initializer/mod.rs

@@ -213,7 +213,7 @@ where
                 let token = cursor.peek(0, interner).or_abrupt()?;
                 let position = token.span().start();
 
-                if let TokenKind::Punctuator(Punctuator::Mul) = token.kind() {
+                if token.kind() == &TokenKind::Punctuator(Punctuator::Mul) {
                     let (class_element_name, method) =
                         AsyncGeneratorMethod::new(self.allow_yield, self.allow_await)
                             .parse(cursor, interner)?;
@@ -223,17 +223,12 @@ where
                         return Err(Error::general("invalid super usage", position));
                     }
 
-                    let property_name =
-                        if let property::ClassElementName::PropertyName(property_name) =
-                            class_element_name
-                        {
-                            property_name
-                        } else {
-                            return Err(Error::general(
-                                "private identifiers not allowed in object literal",
-                                position,
-                            ));
-                        };
+                    let property::ClassElementName::PropertyName(property_name) = class_element_name else {
+                        return Err(Error::general(
+                            "private identifiers not allowed in object literal",
+                            position,
+                        ));
+                    };
 
                     return Ok(property::PropertyDefinition::MethodDefinition(
                         property_name,

boa_parser/src/parser/statement/declaration/hoistable/mod.rs

@@ -90,7 +90,7 @@ where
             }
             TokenKind::Keyword((Keyword::Function, false)) => {
                 let next_token = cursor.peek(1, interner).or_abrupt()?;
-                if let TokenKind::Punctuator(Punctuator::Mul) = next_token.kind() {
+                if next_token.kind() == &TokenKind::Punctuator(Punctuator::Mul) {
                     GeneratorDeclaration::new(self.allow_yield, self.allow_await, self.is_default)
                         .parse(cursor, interner)
                         .map(Declaration::from)
@@ -102,7 +102,7 @@ where
             }
             TokenKind::Keyword((Keyword::Async, false)) => {
                 let next_token = cursor.peek(2, interner).or_abrupt()?;
-                if let TokenKind::Punctuator(Punctuator::Mul) = next_token.kind() {
+                if next_token.kind() == &TokenKind::Punctuator(Punctuator::Mul) {
                     AsyncGeneratorDeclaration::new(
                         self.allow_yield,
                         self.allow_await,

boa_parser/src/parser/statement/mod.rs

@@ -632,7 +632,7 @@ where
             }
 
             if let Some(peek_token) = cursor.peek(0, interner)? {
-                if let TokenKind::Punctuator(Punctuator::Comma) = peek_token.kind() {
+                if peek_token.kind() == &TokenKind::Punctuator(Punctuator::Comma) {
                     cursor.expect(
                         TokenKind::Punctuator(Punctuator::Comma),
                         "object binding pattern",
@@ -830,7 +830,7 @@ where
             }
 
             if let Some(peek_token) = cursor.peek(0, interner)? {
-                if let TokenKind::Punctuator(Punctuator::Comma) = peek_token.kind() {
+                if peek_token.kind() == &TokenKind::Punctuator(Punctuator::Comma) {
                     cursor.expect(
                         TokenKind::Punctuator(Punctuator::Comma),
                         "array binding pattern",

boa_tester/src/main.rs

@@ -60,7 +60,6 @@
     clippy::nursery,
 )]
 #![allow(
-    clippy::use_self,
     clippy::too_many_lines,
     clippy::redundant_pub_crate,
     clippy::cast_precision_loss,