Fix rust 1.75 lints (#3540)

cli/src/debug/function.rs

@@ -52,7 +52,7 @@ fn flowgraph_parse_direction_option(value: &JsValue) -> JsResult<Direction> {
 
 /// Get functions instruction flowgraph
 fn flowgraph(_this: &JsValue, args: &[JsValue], context: &mut Context) -> JsResult<JsValue> {
-    let Some(value) = args.get(0) else {
+    let Some(value) = args.first() else {
         return Err(JsNativeError::typ()
             .with_message("expected function argument")
             .into());
@@ -100,7 +100,7 @@ fn flowgraph(_this: &JsValue, args: &[JsValue], context: &mut Context) -> JsResu
 }
 
 fn bytecode(_: &JsValue, args: &[JsValue], _: &mut Context) -> JsResult<JsValue> {
-    let Some(value) = args.get(0) else {
+    let Some(value) = args.first() else {
         return Err(JsNativeError::typ()
             .with_message("expected function argument")
             .into());

cli/src/debug/object.rs

@@ -5,7 +5,7 @@ use boa_engine::{
 
 /// Returns objects pointer in memory.
 fn id(_: &JsValue, args: &[JsValue], _: &mut Context) -> JsResult<JsValue> {
-    let Some(value) = args.get(0) else {
+    let Some(value) = args.first() else {
         return Err(JsNativeError::typ()
             .with_message("expected object argument")
             .into());

core/engine/src/builtins/array/mod.rs

@@ -1769,7 +1769,7 @@ impl Array {
         let mut depth_num = 1;
 
         // 4. If depth is not undefined, then set depthNum to IntegerOrInfinity(depth)
-        if let Some(depth) = args.get(0) {
+        if let Some(depth) = args.first() {
             // a. Set depthNum to ? ToIntegerOrInfinity(depth).
             // b. If depthNum < 0, set depthNum to 0.
             match depth.to_integer_or_infinity(context)? {
@@ -2270,7 +2270,7 @@ impl Array {
         // 2. Let len be ? LengthOfArrayLike(O).
         let len = o.length_of_array_like(context)?;
 
-        let start = args.get(0);
+        let start = args.first();
         let delete_count = args.get(1);
         let items = args.get(2..).unwrap_or_default();
 
@@ -2410,7 +2410,7 @@ impl Array {
         // 2. Let len be ? LengthOfArrayLike(O).
         let len = o.length_of_array_like(context)?;
 
-        let start = args.get(0);
+        let start = args.first();
         let skip_count = args.get(1);
         let items = args.get(2..).unwrap_or_default();
 

core/engine/src/builtins/boolean/mod.rs

@@ -64,7 +64,7 @@ impl BuiltInConstructor for Boolean {
         context: &mut Context,
     ) -> JsResult<JsValue> {
         // Get the argument, if any
-        let data = args.get(0).map_or(false, JsValue::to_boolean);
+        let data = args.first().map_or(false, JsValue::to_boolean);
         if new_target.is_undefined() {
             return Ok(JsValue::new(data));
         }

core/engine/src/builtins/date/mod.rs

@@ -448,7 +448,7 @@ impl Date {
         // This method is implementation-defined and discouraged, so we just require the same format as the string
         // constructor.
 
-        let date = some_or_nan!(args.get(0));
+        let date = some_or_nan!(args.first());
 
         let date = date.to_string(context)?;
 

core/engine/src/builtins/intl/collator/mod.rs

@@ -43,6 +43,7 @@ mod options;
 pub(crate) use options::*;
 
 #[derive(Debug, Finalize, JsData)]
+#[allow(clippy::struct_field_names)]
 pub(crate) struct Collator {
     locale: Locale,
     collation: Value,

core/engine/src/builtins/intl/date_time_format.rs

@@ -42,7 +42,7 @@ impl OptionType for HourCycle {
 /// JavaScript `Intl.DateTimeFormat` object.
 #[derive(Debug, Clone, Trace, Finalize, JsData)]
 pub(crate) struct DateTimeFormat {
-    initialized_date_time_format: bool,
+    initialized: bool,
     locale: JsString,
     calendar: JsString,
     numbering_system: JsString,
@@ -125,7 +125,7 @@ impl BuiltInConstructor for DateTimeFormat {
             context.root_shape(),
             prototype,
             Self {
-                initialized_date_time_format: true,
+                initialized: true,
                 locale: js_string!("en-US"),
                 calendar: js_string!("gregory"),
                 numbering_system: js_string!("arab"),

core/engine/src/builtins/iterable/async_from_sync_iterator.rs

@@ -121,7 +121,7 @@ impl AsyncFromSyncIterator {
         let result = next
             .call(
                 &iterator.into(),
-                args.get(0).map_or(&[], std::slice::from_ref),
+                args.first().map_or(&[], std::slice::from_ref),
                 context,
             )
             .and_then(IteratorResult::from_value);
@@ -164,7 +164,7 @@ impl AsyncFromSyncIterator {
         // 6. IfAbruptRejectPromise(return, promiseCapability).
         let r#return = if_abrupt_reject_promise!(r#return, promise_capability, context);
 
-        let result = match (r#return, args.get(0)) {
+        let result = match (r#return, args.first()) {
             // 7. If return is undefined, then
             (None, _) => {
                 // a. Let iterResult be CreateIterResultObject(value, true).
@@ -234,7 +234,7 @@ impl AsyncFromSyncIterator {
         // 6. IfAbruptRejectPromise(throw, promiseCapability).
         let throw = if_abrupt_reject_promise!(throw, promise_capability, context);
 
-        let result = match (throw, args.get(0)) {
+        let result = match (throw, args.first()) {
             // 7. If throw is undefined, then
             (None, _) => {
                 // a. Perform ! Call(promiseCapability.[[Reject]], undefined, « value »).

core/engine/src/builtins/json/mod.rs

@@ -84,7 +84,7 @@ impl Json {
     pub(crate) fn parse(_: &JsValue, args: &[JsValue], context: &mut Context) -> JsResult<JsValue> {
         // 1. Let jsonString be ? ToString(text).
         let json_string = args
-            .get(0)
+            .first()
             .cloned()
             .unwrap_or_default()
             .to_string(context)?

core/engine/src/builtins/number/globals.rs

@@ -26,7 +26,7 @@ use num_traits::Num;
 /// [spec]: https://tc39.es/ecma262/#sec-isfinite-number
 /// [mdn]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/isFinite
 fn is_finite(_: &JsValue, args: &[JsValue], context: &mut Context) -> JsResult<JsValue> {
-    if let Some(value) = args.get(0) {
+    if let Some(value) = args.first() {
         let number = value.to_number(context)?;
         Ok(number.is_finite().into())
     } else {
@@ -68,7 +68,7 @@ impl BuiltInObject for IsFinite {
 /// [spec]: https://tc39.es/ecma262/#sec-isnan-number
 /// [mdn]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/isNaN
 pub(crate) fn is_nan(_: &JsValue, args: &[JsValue], context: &mut Context) -> JsResult<JsValue> {
-    if let Some(value) = args.get(0) {
+    if let Some(value) = args.first() {
         let number = value.to_number(context)?;
         Ok(number.is_nan().into())
     } else {
@@ -110,7 +110,7 @@ impl BuiltInObject for IsNaN {
 /// [spec]: https://tc39.es/ecma262/#sec-parseint-string-radix
 /// [mdn]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/parseInt
 pub(crate) fn parse_int(_: &JsValue, args: &[JsValue], context: &mut Context) -> JsResult<JsValue> {
-    if let (Some(val), radix) = (args.get(0), args.get_or_undefined(1)) {
+    if let (Some(val), radix) = (args.first(), args.get_or_undefined(1)) {
         // 1. Let inputString be ? ToString(string).
         let input_string = val.to_string(context)?;
 
@@ -252,7 +252,7 @@ pub(crate) fn parse_float(
     args: &[JsValue],
     context: &mut Context,
 ) -> JsResult<JsValue> {
-    if let Some(val) = args.get(0) {
+    if let Some(val) = args.first() {
         // TODO: parse float with optimal utf16 algorithm
         let input_string = val.to_string(context)?.to_std_string_escaped();
         let s = input_string.trim_start_matches(is_trimmable_whitespace);

core/engine/src/builtins/number/mod.rs

@@ -117,7 +117,7 @@ impl BuiltInConstructor for Number {
         args: &[JsValue],
         context: &mut Context,
     ) -> JsResult<JsValue> {
-        let data = match args.get(0) {
+        let data = match args.first() {
             Some(value) => value.to_numeric_number(context)?,
             None => 0.0,
         };
@@ -221,7 +221,7 @@ impl Number {
     ) -> JsResult<JsValue> {
         // 1. Let x be ? thisNumberValue(this value).
         let this_num = Self::this_number_value(this)?;
-        let precision = match args.get(0) {
+        let precision = match args.first() {
             None | Some(JsValue::Undefined) => None,
             // 2. Let f be ? ToIntegerOrInfinity(fractionDigits).
             Some(n) => Some(n.to_integer_or_infinity(context)?),
@@ -748,7 +748,7 @@ impl Number {
         // 1. If number is not a Number, return false.
         // 2. If number is not finite, return false.
         // 3. Otherwise, return true.
-        Ok(JsValue::new(args.get(0).map_or(false, |val| match val {
+        Ok(JsValue::new(args.first().map_or(false, |val| match val {
             JsValue::Integer(_) => true,
             JsValue::Rational(number) => number.is_finite(),
             _ => false,
@@ -771,7 +771,7 @@ impl Number {
         args: &[JsValue],
         _ctx: &mut Context,
     ) -> JsResult<JsValue> {
-        Ok(args.get(0).map_or(false, Self::is_integer).into())
+        Ok(args.first().map_or(false, Self::is_integer).into())
     }
 
     /// `Number.isNaN( number )`
@@ -795,7 +795,7 @@ impl Number {
         _ctx: &mut Context,
     ) -> JsResult<JsValue> {
         Ok(JsValue::new(
-            if let Some(&JsValue::Rational(number)) = args.get(0) {
+            if let Some(&JsValue::Rational(number)) = args.first() {
                 number.is_nan()
             } else {
                 false
@@ -823,7 +823,7 @@ impl Number {
         args: &[JsValue],
         _ctx: &mut Context,
     ) -> JsResult<JsValue> {
-        Ok(JsValue::new(match args.get(0) {
+        Ok(JsValue::new(match args.first() {
             Some(JsValue::Integer(_)) => true,
             Some(JsValue::Rational(number)) if Self::is_float_integer(*number) => {
                 number.abs() <= Self::MAX_SAFE_INTEGER

core/engine/src/builtins/object/mod.rs

@@ -676,7 +676,7 @@ impl OrdinaryObject {
 
         // 1. Set O to ? RequireObjectCoercible(O).
         let o = args
-            .get(0)
+            .first()
             .cloned()
             .unwrap_or_default()
             .require_object_coercible()?
@@ -945,7 +945,7 @@ impl OrdinaryObject {
         args: &[JsValue],
         context: &mut Context,
     ) -> JsResult<JsValue> {
-        let Some(key) = args.get(0) else {
+        let Some(key) = args.first() else {
             return Ok(JsValue::new(false));
         };
 
@@ -1030,7 +1030,7 @@ impl OrdinaryObject {
     pub fn keys(_: &JsValue, args: &[JsValue], context: &mut Context) -> JsResult<JsValue> {
         // 1. Let obj be ? ToObject(target).
         let obj = args
-            .get(0)
+            .first()
             .cloned()
             .unwrap_or_default()
             .to_object(context)?;
@@ -1055,7 +1055,7 @@ impl OrdinaryObject {
     pub fn values(_: &JsValue, args: &[JsValue], context: &mut Context) -> JsResult<JsValue> {
         // 1. Let obj be ? ToObject(target).
         let obj = args
-            .get(0)
+            .first()
             .cloned()
             .unwrap_or_default()
             .to_object(context)?;
@@ -1084,7 +1084,7 @@ impl OrdinaryObject {
     pub fn entries(_: &JsValue, args: &[JsValue], context: &mut Context) -> JsResult<JsValue> {
         // 1. Let obj be ? ToObject(target).
         let obj = args
-            .get(0)
+            .first()
             .cloned()
             .unwrap_or_default()
             .to_object(context)?;

core/engine/src/builtins/reflect/mod.rs

@@ -84,7 +84,7 @@ impl Reflect {
     /// [mdn]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/apply
     pub(crate) fn apply(_: &JsValue, args: &[JsValue], context: &mut Context) -> JsResult<JsValue> {
         let target = args
-            .get(0)
+            .first()
             .and_then(JsValue::as_object)
             .ok_or_else(|| JsNativeError::typ().with_message("target must be a function"))?;
         let this_arg = args.get_or_undefined(1);
@@ -153,7 +153,7 @@ impl Reflect {
         context: &mut Context,
     ) -> JsResult<JsValue> {
         let target = args
-            .get(0)
+            .first()
             .and_then(JsValue::as_object)
             .ok_or_else(|| JsNativeError::typ().with_message("target must be an object"))?;
         let key = args.get_or_undefined(1).to_property_key(context)?;
@@ -188,7 +188,7 @@ impl Reflect {
         context: &mut Context,
     ) -> JsResult<JsValue> {
         let target = args
-            .get(0)
+            .first()
             .and_then(JsValue::as_object)
             .ok_or_else(|| JsNativeError::typ().with_message("target must be an object"))?;
         let key = args.get_or_undefined(1).to_property_key(context)?;
@@ -209,7 +209,7 @@ impl Reflect {
     pub(crate) fn get(_: &JsValue, args: &[JsValue], context: &mut Context) -> JsResult<JsValue> {
         // 1. If Type(target) is not Object, throw a TypeError exception.
         let target = args
-            .get(0)
+            .first()
             .and_then(JsValue::as_object)
             .ok_or_else(|| JsNativeError::typ().with_message("target must be an object"))?;
         // 2. Let key be ? ToPropertyKey(propertyKey).
@@ -267,7 +267,7 @@ impl Reflect {
         context: &mut Context,
     ) -> JsResult<JsValue> {
         let target = args
-            .get(0)
+            .first()
             .and_then(JsValue::as_object)
             .ok_or_else(|| JsNativeError::typ().with_message("target must be an object"))?;
         Ok(target
@@ -285,7 +285,7 @@ impl Reflect {
     /// [mdn]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/has
     pub(crate) fn has(_: &JsValue, args: &[JsValue], context: &mut Context) -> JsResult<JsValue> {
         let target = args
-            .get(0)
+            .first()
             .and_then(JsValue::as_object)
             .ok_or_else(|| JsNativeError::typ().with_message("target must be an object"))?;
         let key = args
@@ -312,7 +312,7 @@ impl Reflect {
         context: &mut Context,
     ) -> JsResult<JsValue> {
         let target = args
-            .get(0)
+            .first()
             .and_then(JsValue::as_object)
             .ok_or_else(|| JsNativeError::typ().with_message("target must be an object"))?;
         Ok(target
@@ -334,7 +334,7 @@ impl Reflect {
         context: &mut Context,
     ) -> JsResult<JsValue> {
         let target = args
-            .get(0)
+            .first()
             .and_then(JsValue::as_object)
             .ok_or_else(|| JsNativeError::typ().with_message("target must be an object"))?;
 
@@ -361,7 +361,7 @@ impl Reflect {
         context: &mut Context,
     ) -> JsResult<JsValue> {
         let target = args
-            .get(0)
+            .first()
             .and_then(JsValue::as_object)
             .ok_or_else(|| JsNativeError::typ().with_message("target must be an object"))?;
 
@@ -380,7 +380,7 @@ impl Reflect {
     /// [mdn]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Reflect/set
     pub(crate) fn set(_: &JsValue, args: &[JsValue], context: &mut Context) -> JsResult<JsValue> {
         let target = args
-            .get(0)
+            .first()
             .and_then(JsValue::as_object)
             .ok_or_else(|| JsNativeError::typ().with_message("target must be an object"))?;
         let key = args.get_or_undefined(1).to_property_key(context)?;
@@ -414,7 +414,7 @@ impl Reflect {
         context: &mut Context,
     ) -> JsResult<JsValue> {
         let target = args
-            .get(0)
+            .first()
             .and_then(JsValue::as_object)
             .ok_or_else(|| JsNativeError::typ().with_message("target must be an object"))?;
         let proto = match args.get_or_undefined(1) {

core/engine/src/builtins/regexp/mod.rs

@@ -760,7 +760,7 @@ impl RegExp {
 
         // 3. Let string be ? ToString(S).
         let arg_str = args
-            .get(0)
+            .first()
             .cloned()
             .unwrap_or_default()
             .to_string(context)?;

core/engine/src/builtins/string/mod.rs

@@ -209,7 +209,7 @@ impl BuiltInConstructor for String {
     ) -> JsResult<JsValue> {
         // This value is used by console.log and other routines to match Object type
         // to its Javascript Identifier (global constructor method name)
-        let string = match args.get(0) {
+        let string = match args.first() {
             // 2. Else,
             // a. If NewTarget is undefined and Type(value) is Symbol, return SymbolDescriptiveString(value).
             Some(JsValue::Symbol(ref sym)) if new_target.is_undefined() => {

core/engine/src/builtins/symbol/mod.rs

@@ -213,7 +213,7 @@ impl BuiltInConstructor for Symbol {
 
         // 2. If description is undefined, let descString be undefined.
         // 3. Else, let descString be ? ToString(description).
-        let description = match args.get(0) {
+        let description = match args.first() {
             Some(value) if !value.is_undefined() => Some(value.to_string(context)?),
             _ => None,
         };
@@ -315,7 +315,7 @@ impl Symbol {
     pub(crate) fn for_(_: &JsValue, args: &[JsValue], context: &mut Context) -> JsResult<JsValue> {
         // 1. Let stringKey be ? ToString(key).
         let string_key = args
-            .get(0)
+            .first()
             .cloned()
             .unwrap_or_default()
             .to_string(context)?;

core/engine/src/builtins/temporal/duration/mod.rs

@@ -186,7 +186,7 @@ impl BuiltInConstructor for Duration {
 
         // 2. If years is undefined, let y be 0; else let y be ? ToIntegerIfIntegral(years).
         let years = f64::from(
-            args.get(0)
+            args.first()
                 .map_or(Ok(0), |y| to_integer_if_integral(y, context))?,
         );
 

core/engine/src/builtins/typed_array/builtin.rs

@@ -2510,7 +2510,7 @@ impl BuiltinTypedArray {
         context: &mut Context,
     ) -> JsResult<JsValue> {
         // 1. If comparefn is not undefined and IsCallable(comparefn) is false, throw a TypeError exception.
-        let compare_fn = match args.get(0) {
+        let compare_fn = match args.first() {
             None | Some(JsValue::Undefined) => None,
             Some(JsValue::Object(obj)) if obj.is_callable() => Some(obj),
             _ => {
@@ -2577,7 +2577,7 @@ impl BuiltinTypedArray {
         context: &mut Context,
     ) -> JsResult<JsValue> {
         // 1. If comparefn is not undefined and IsCallable(comparefn) is false, throw a TypeError exception.
-        let compare_fn = match args.get(0) {
+        let compare_fn = match args.first() {
             None | Some(JsValue::Undefined) => None,
             Some(JsValue::Object(obj)) if obj.is_callable() => Some(obj),
             _ => {

core/engine/src/builtins/weak/weak_ref.rs

@@ -73,7 +73,7 @@ impl BuiltInConstructor for WeakRef {
         }
 
         // 2. If target is not an Object, throw a TypeError exception.
-        let target = args.get(0).and_then(JsValue::as_object).ok_or_else(|| {
+        let target = args.first().and_then(JsValue::as_object).ok_or_else(|| {
             JsNativeError::typ().with_message(format!(
                 "WeakRef: expected target argument of type `object`, got target of type `{}`",
                 args.get_or_undefined(0).type_of()

core/engine/src/module/synthetic.rs

@@ -97,7 +97,10 @@ impl SyntheticModuleInitializer {
     {
         // SAFETY: The caller must ensure the invariants of the closure hold.
         unsafe {
-            Self::from_closure_with_captures(move |module, _, context| closure(module, context), ())
+            Self::from_closure_with_captures(
+                move |module, (), context| closure(module, context),
+                (),
+            )
         }
     }
 

core/engine/src/native_function.rs

@@ -275,7 +275,7 @@ impl NativeFunction {
         // SAFETY: The caller must ensure the invariants of the closure hold.
         unsafe {
             Self::from_closure_with_captures(
-                move |this, args, _, context| closure(this, args, context),
+                move |this, args, (), context| closure(this, args, context),
                 (),
             )
         }

core/engine/src/object/internal_methods/mod.rs

@@ -324,7 +324,7 @@ pub(crate) static ORDINARY_INTERNAL_METHODS: InternalObjectMethods = InternalObj
 ///
 /// For a guide on how to implement exotic internal methods, see `ORDINARY_INTERNAL_METHODS`.
 #[derive(Debug, Clone, Copy)]
-#[allow(clippy::type_complexity)]
+#[allow(clippy::type_complexity, clippy::struct_field_names)]
 pub struct InternalObjectMethods {
     pub(crate) __get_prototype_of__: fn(&JsObject, &mut Context) -> JsResult<JsPrototype>,
     pub(crate) __set_prototype_of__: fn(&JsObject, JsPrototype, &mut Context) -> JsResult<bool>,

core/engine/src/small_map/mod.rs

@@ -173,6 +173,7 @@ impl<K, V, const ARRAY_SIZE: usize> SmallMap<K, V, ARRAY_SIZE> {
     ///
     /// The supplied key may be any borrowed form of the map's key type, but the ordering
     /// on the borrowed form *must* match the ordering on the key type.
+    #[allow(clippy::map_identity)]
     pub fn get_key_value<Q: ?Sized>(&self, key: &Q) -> Option<(&K, &V)>
     where
         K: Borrow<Q> + Ord + Eq,
@@ -371,6 +372,7 @@ impl<'a, K, V, const ARRAY_SIZE: usize> IntoIterator for &'a SmallMap<K, V, ARRA
 impl<'a, K, V> Iterator for Iter<'a, K, V> {
     type Item = (&'a K, &'a V);
 
+    #[allow(clippy::map_identity)]
     fn next(&mut self) -> Option<Self::Item> {
         match &mut self.inner {
             InnerIter::Inline(i) => i.next().map(|(k, v)| (k, v)),
@@ -385,6 +387,7 @@ impl<'a, K, V> Iterator for Iter<'a, K, V> {
         }
     }
 
+    #[allow(clippy::map_identity)]
     fn last(self) -> Option<(&'a K, &'a V)> {
         match self.inner {
             InnerIter::Inline(i) => i.last().map(|(k, v)| (k, v)),
@@ -396,6 +399,7 @@ impl<'a, K, V> Iterator for Iter<'a, K, V> {
 impl<K, V> FusedIterator for Iter<'_, K, V> {}
 
 impl<'a, K: 'a, V: 'a> DoubleEndedIterator for Iter<'a, K, V> {
+    #[allow(clippy::map_identity)]
     fn next_back(&mut self) -> Option<(&'a K, &'a V)> {
         match &mut self.inner {
             InnerIter::Inline(i) => i.next_back().map(|(k, v)| (k, v)),

core/engine/src/vm/flowgraph/graph.rs

@@ -1,9 +1,5 @@
-use std::{
-    collections::hash_map::RandomState,
-    hash::{BuildHasher, Hash, Hasher},
-};
-
 use crate::vm::flowgraph::{Color, Edge, EdgeStyle, EdgeType, Node, NodeShape};
+use std::{collections::hash_map::RandomState, hash::BuildHasher};
 
 /// This represents the direction of flow in the flowgraph.
 #[derive(Debug, Clone, Copy)]
@@ -100,9 +96,7 @@ impl SubGraph {
 
     /// Format into the graphviz format.
     fn graphviz_format(&self, result: &mut String, prefix: &str) {
-        let mut hasher = RandomState::new().build_hasher();
-        self.label.hash(&mut hasher);
-        let label = format!("{}", hasher.finish());
+        let label = format!("{}", RandomState::new().hash_one(&self.label));
         result.push_str(&format!("\tsubgraph cluster_{prefix}_{label} {{\n"));
         result.push_str("\t\tstyle = filled;\n");
         result.push_str(&format!(
@@ -164,9 +158,7 @@ impl SubGraph {
 
     /// Format into the mermaid format.
     fn mermaid_format(&self, result: &mut String, prefix: &str) {
-        let mut hasher = RandomState::new().build_hasher();
-        self.label.hash(&mut hasher);
-        let label = format!("{}", hasher.finish());
+        let label = format!("{}", RandomState::new().hash_one(&self.label));
         let rankdir = match self.direction {
             Direction::TopToBottom => "TB",
             Direction::BottomToTop => "BT",

core/engine/src/vm/opcode/call/mod.rs

@@ -37,7 +37,7 @@ impl CallEval {
             let arguments = context.vm.pop_n_values(argument_count);
             let _func = context.vm.pop();
             let _this = context.vm.pop();
-            if let Some(x) = arguments.get(0) {
+            if let Some(x) = arguments.first() {
                 // i. Let argList be ? ArgumentListEvaluation of arguments.
                 // ii. If argList has no elements, return undefined.
                 // iii. Let evalArg be the first element of argList.
@@ -130,7 +130,7 @@ impl Operation for CallEvalSpread {
         if JsObject::equals(object, &eval) {
             let _func = context.vm.pop();
             let _this = context.vm.pop();
-            if let Some(x) = arguments.get(0) {
+            if let Some(x) = arguments.first() {
                 // i. Let argList be ? ArgumentListEvaluation of arguments.
                 // ii. If argList has no elements, return undefined.
                 // iii. Let evalArg be the first element of argList.

core/parser/src/lib.rs

@@ -21,7 +21,8 @@
     clippy::too_many_lines,
     clippy::cognitive_complexity,
     clippy::let_unit_value,
-    clippy::redundant_pub_crate
+    clippy::redundant_pub_crate,
+    clippy::struct_field_names
 )]
 
 pub mod error;

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

@@ -81,33 +81,31 @@ where
         let _timer = Profiler::global().start_event("ArrowFunction", "Parsing");
         let next_token = cursor.peek(0, interner).or_abrupt()?;
 
-        let (params, params_start_position) = if next_token.kind()
-            == &TokenKind::Punctuator(Punctuator::OpenParen)
-        {
-            // CoverParenthesizedExpressionAndArrowParameterList
-            let params_start_position = cursor
-                .expect(Punctuator::OpenParen, "arrow function", interner)?
-                .span()
-                .end();
-
-            let params = FormalParameters::new(self.allow_yield, self.allow_await)
-                .parse(cursor, interner)?;
-            cursor.expect(Punctuator::CloseParen, "arrow function", interner)?;
-            (params, params_start_position)
-        } else {
-            let params_start_position = next_token.span().start();
-            let param = BindingIdentifier::new(self.allow_yield, self.allow_await)
-                .parse(cursor, interner)
-                .set_context("arrow function")?;
-            (
-                FormalParameterList::try_from(FormalParameter::new(
-                    Variable::from_identifier(param, None),
-                    false,
-                ))
-                .expect("a single binding identifier without init is always a valid param list"),
-                params_start_position,
-            )
-        };
+        let (params, params_start_position) =
+            if next_token.kind() == &TokenKind::Punctuator(Punctuator::OpenParen) {
+                // CoverParenthesizedExpressionAndArrowParameterList
+                let params_start_position = cursor
+                    .expect(Punctuator::OpenParen, "arrow function", interner)?
+                    .span()
+                    .end();
+
+                let params = FormalParameters::new(self.allow_yield, self.allow_await)
+                    .parse(cursor, interner)?;
+                cursor.expect(Punctuator::CloseParen, "arrow function", interner)?;
+                (params, params_start_position)
+            } else {
+                let params_start_position = next_token.span().start();
+                let param = BindingIdentifier::new(self.allow_yield, self.allow_await)
+                    .parse(cursor, interner)
+                    .set_context("arrow function")?;
+                (
+                    FormalParameterList::from(FormalParameter::new(
+                        Variable::from_identifier(param, None),
+                        false,
+                    )),
+                    params_start_position,
+                )
+            };
 
         cursor.peek_expect_no_lineterminator(0, "arrow function", interner)?;
 

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

@@ -77,31 +77,29 @@ 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 next_token.kind()
-            == &TokenKind::Punctuator(Punctuator::OpenParen)
-        {
-            let params_start_position = cursor
-                .expect(Punctuator::OpenParen, "async arrow function", interner)?
-                .span()
-                .end();
-
-            let params = FormalParameters::new(false, true).parse(cursor, interner)?;
-            cursor.expect(Punctuator::CloseParen, "async arrow function", interner)?;
-            (params, params_start_position)
-        } else {
-            let params_start_position = next_token.span().start();
-            let param = BindingIdentifier::new(self.allow_yield, true)
-                .parse(cursor, interner)
-                .set_context("async arrow function")?;
-            (
-                FormalParameterList::try_from(FormalParameter::new(
-                    Variable::from_identifier(param, None),
-                    false,
-                ))
-                .expect("a single binding identifier without init is always a valid param list"),
-                params_start_position,
-            )
-        };
+        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)?
+                    .span()
+                    .end();
+
+                let params = FormalParameters::new(false, true).parse(cursor, interner)?;
+                cursor.expect(Punctuator::CloseParen, "async arrow function", interner)?;
+                (params, params_start_position)
+            } else {
+                let params_start_position = next_token.span().start();
+                let param = BindingIdentifier::new(self.allow_yield, true)
+                    .parse(cursor, interner)
+                    .set_context("async arrow function")?;
+                (
+                    FormalParameterList::from(FormalParameter::new(
+                        Variable::from_identifier(param, None),
+                        false,
+                    )),
+                    params_start_position,
+                )
+            };
 
         cursor.peek_expect_no_lineterminator(0, "async arrow function", interner)?;
         cursor.expect(Punctuator::Arrow, "async arrow function", interner)?;

core/runtime/src/console/mod.rs

@@ -270,7 +270,7 @@ impl Console {
         console: &Self,
         context: &mut Context,
     ) -> JsResult<JsValue> {
-        let assertion = args.get(0).map_or(false, JsValue::to_boolean);
+        let assertion = args.first().map_or(false, JsValue::to_boolean);
 
         if !assertion {
             let mut args: Vec<JsValue> = args.iter().skip(1).cloned().collect();
@@ -456,7 +456,7 @@ impl Console {
         console: &mut Self,
         context: &mut Context,
     ) -> JsResult<JsValue> {
-        let label = match args.get(0) {
+        let label = match args.first() {
             Some(value) => value.to_string(context)?,
             None => "default".into(),
         };
@@ -485,7 +485,7 @@ impl Console {
         console: &mut Self,
         context: &mut Context,
     ) -> JsResult<JsValue> {
-        let label = match args.get(0) {
+        let label = match args.first() {
             Some(value) => value.to_string(context)?,
             None => "default".into(),
         };
@@ -524,7 +524,7 @@ impl Console {
         console: &mut Self,
         context: &mut Context,
     ) -> JsResult<JsValue> {
-        let label = match args.get(0) {
+        let label = match args.first() {
             Some(value) => value.to_string(context)?,
             None => "default".into(),
         };
@@ -561,7 +561,7 @@ impl Console {
         console: &Self,
         context: &mut Context,
     ) -> JsResult<JsValue> {
-        let label = match args.get(0) {
+        let label = match args.first() {
             Some(value) => value.to_string(context)?,
             None => "default".into(),
         };
@@ -605,7 +605,7 @@ impl Console {
         console: &mut Self,
         context: &mut Context,
     ) -> JsResult<JsValue> {
-        let label = match args.get(0) {
+        let label = match args.first() {
             Some(value) => value.to_string(context)?,
             None => "default".into(),
         };

core/temporal/src/components/duration.rs

@@ -361,6 +361,13 @@ impl Duration {
     pub fn is_time_within_range(&self) -> bool {
         self.time.is_within_range()
     }
+
+    /// Return an iterator over the `Duration`'s values.
+    #[inline]
+    #[must_use]
+    pub fn iter(&self) -> DurationIter<'_> {
+        <&Self as IntoIterator>::into_iter(self)
+    }
 }
 
 // ==== Public `Duration` Getters/Setters ====

examples/src/bin/classes.rs

@@ -107,7 +107,7 @@ impl Class for Person {
             js_string!("is"),
             1,
             NativeFunction::from_fn_ptr(|_this, args, _ctx| {
-                if let Some(arg) = args.get(0) {
+                if let Some(arg) = args.first() {
                     if let Some(object) = arg.as_object() {
                         // We check if the type of `args[0]` is `Person`
                         if object.is::<Person>() {

examples/src/bin/jsarray.rs

@@ -68,7 +68,7 @@ fn main() -> JsResult<()> {
     let filter_callback = FunctionObjectBuilder::new(
         context.realm(),
         NativeFunction::from_fn_ptr(|_this, args, _context| {
-            Ok(args.get(0).cloned().unwrap_or_default().is_number().into())
+            Ok(args.first().cloned().unwrap_or_default().is_number().into())
         }),
     )
     .build();
@@ -76,7 +76,7 @@ fn main() -> JsResult<()> {
     let map_callback = FunctionObjectBuilder::new(
         context.realm(),
         NativeFunction::from_fn_ptr(|_this, args, context| {
-            args.get(0)
+            args.first()
                 .cloned()
                 .unwrap_or_default()
                 .pow(&JsValue::new(2), context)
@@ -102,7 +102,7 @@ fn main() -> JsResult<()> {
     let reduce_callback = FunctionObjectBuilder::new(
         context.realm(),
         NativeFunction::from_fn_ptr(|_this, args, context| {
-            let accumulator = args.get(0).cloned().unwrap_or_default();
+            let accumulator = args.first().cloned().unwrap_or_default();
             let value = args.get(1).cloned().unwrap_or_default();
 
             accumulator.add(&value, context)

examples/src/bin/jstypedarray.rs

@@ -28,7 +28,7 @@ fn main() -> JsResult<()> {
     let callback = FunctionObjectBuilder::new(
         context.realm(),
         NativeFunction::from_fn_ptr(|_this, args, context| {
-            let accumulator = args.get(0).cloned().unwrap_or_default();
+            let accumulator = args.first().cloned().unwrap_or_default();
             let value = args.get(1).cloned().unwrap_or_default();
 
             accumulator.add(&value, context)

tests/tester/src/exec/js262.rs

@@ -136,7 +136,7 @@ fn detach_array_buffer(_: &JsValue, args: &[JsValue], _: &mut Context) -> JsResu
     }
 
     let array_buffer = args
-        .get(0)
+        .first()
         .and_then(JsValue::as_object)
         .ok_or_else(type_err)?;
     let mut array_buffer = array_buffer.borrow_mut();
@@ -162,7 +162,7 @@ fn detach_array_buffer(_: &JsValue, args: &[JsValue], _: &mut Context) -> JsResu
 ///
 /// Accepts a string value as its first argument and executes it as an ECMAScript script.
 fn eval_script(_this: &JsValue, args: &[JsValue], context: &mut Context) -> JsResult<JsValue> {
-    args.get(0).and_then(JsValue::as_string).map_or_else(
+    args.first().and_then(JsValue::as_string).map_or_else(
         || Ok(JsValue::undefined()),
         |source_text| context.eval(Source::from_bytes(&source_text.to_std_string_escaped())),
     )