Fixing build for changes in clippy for Rust 1.61 (#2082)

This fixes the CI after the upgrade to Rust 1.61. I had to "allow" the `use_self` lint, due to rust-lang/rust-clippy#8845 and rust-lang/rust-clippy#6902.

It removed some false negatives, though, so I fixed some of the usage.

boa_engine/src/builtins/intl/tests.rs

@@ -28,7 +28,7 @@ fn best_avail_loc() {
     );
 
     let locale_part = "fr".to_string();
-    let no_extensions_locale = JsString::new(locale_part.clone() + &"-CA".to_string());
+    let no_extensions_locale = JsString::new(locale_part.clone() + "-CA");
     let available_locales = vec![JsString::new(locale_part.clone())];
     assert_eq!(
         best_available_locale(&available_locales, &no_extensions_locale,),
@@ -38,7 +38,7 @@ fn best_avail_loc() {
     let ja_kana_t = JsString::new("ja-Kana-JP-t");
     let ja_kana = JsString::new("ja-Kana-JP");
     let no_extensions_locale = JsString::new("ja-Kana-JP-t-it-latn-it");
-    let available_locales = vec![ja_kana_t.clone(), ja_kana.clone()];
+    let available_locales = vec![ja_kana_t, ja_kana.clone()];
     assert_eq!(
         best_available_locale(&available_locales, &no_extensions_locale,),
         Some(ja_kana)
@@ -108,7 +108,7 @@ fn insert_unicode_ext() {
 fn uni_ext_comp() {
     let ext = JsString::new("-u-ca-japanese-hc-h12");
     let components = unicode_extension_components(&ext);
-    assert_eq!(components.attributes.is_empty(), true);
+    assert!(components.attributes.is_empty());
     assert_eq!(components.keywords.len(), 2);
     assert_eq!(components.keywords[0].key, "ca");
     assert_eq!(components.keywords[0].value, "japanese");
@@ -126,7 +126,7 @@ fn uni_ext_comp() {
 
     let ext = JsString::new("-u-ca-buddhist-kk-nu-thai");
     let components = unicode_extension_components(&ext);
-    assert_eq!(components.attributes.is_empty(), true);
+    assert!(components.attributes.is_empty());
     assert_eq!(components.keywords.len(), 3);
     assert_eq!(components.keywords[0].key, "ca");
     assert_eq!(components.keywords[0].value, "buddhist");
@@ -137,7 +137,7 @@ fn uni_ext_comp() {
 
     let ext = JsString::new("-u-ca-islamic-civil");
     let components = unicode_extension_components(&ext);
-    assert_eq!(components.attributes.is_empty(), true);
+    assert!(components.attributes.is_empty());
     assert_eq!(components.keywords.len(), 1);
     assert_eq!(components.keywords[0].key, "ca");
     assert_eq!(components.keywords[0].value, "islamic-civil");
@@ -167,7 +167,7 @@ fn locale_resolution() {
     );
     assert_eq!(locale_record.locale, default_locale());
     assert_eq!(locale_record.data_locale, default_locale());
-    assert_eq!(locale_record.properties.is_empty(), true);
+    assert!(locale_record.properties.is_empty());
 
     // test best fit
     let available_locales = Vec::<JsString>::new();
@@ -189,7 +189,7 @@ fn locale_resolution() {
     );
     assert_eq!(locale_record.locale, default_locale());
     assert_eq!(locale_record.data_locale, default_locale());
-    assert_eq!(locale_record.properties.is_empty(), true);
+    assert!(locale_record.properties.is_empty());
 
     // available: [es-ES], requested: [es-ES]
     let available_locales = vec![JsString::new("es-ES")];
@@ -211,7 +211,7 @@ fn locale_resolution() {
     );
     assert_eq!(locale_record.locale, "es-ES");
     assert_eq!(locale_record.data_locale, "es-ES");
-    assert_eq!(locale_record.properties.is_empty(), true);
+    assert!(locale_record.properties.is_empty());
 
     // available: [zh-CN], requested: []
     let available_locales = vec![JsString::new("zh-CN")];
@@ -233,7 +233,7 @@ fn locale_resolution() {
     );
     assert_eq!(locale_record.locale, default_locale());
     assert_eq!(locale_record.data_locale, default_locale());
-    assert_eq!(locale_record.properties.is_empty(), true);
+    assert!(locale_record.properties.is_empty());
 }
 
 #[test]
@@ -319,7 +319,7 @@ fn get_opt() {
     let other_locale_str = JsString::new("de-DE");
     let values = vec![other_locale_str];
     options_obj
-        .set("Locale", locale_value.clone(), true, &mut context)
+        .set("Locale", locale_value, true, &mut context)
         .expect("Setting a property should not fail");
     let option_type = GetOptionType::String;
     let get_option_result = get_option(
@@ -330,7 +330,7 @@ fn get_opt() {
         &fallback,
         &mut context,
     );
-    assert_eq!(get_option_result.is_err(), true);
+    assert!(get_option_result.is_err());
 
     let value = JsValue::undefined();
     let minimum = 1.0;
@@ -345,21 +345,21 @@ fn get_opt() {
     let maximum = 10.0;
     let fallback = Some(5.0);
     let get_option_result = default_number_option(&value, minimum, maximum, fallback, &mut context);
-    assert_eq!(get_option_result.is_err(), true);
+    assert!(get_option_result.is_err());
 
     let value = JsValue::new(0);
     let minimum = 1.0;
     let maximum = 10.0;
     let fallback = Some(5.0);
     let get_option_result = default_number_option(&value, minimum, maximum, fallback, &mut context);
-    assert_eq!(get_option_result.is_err(), true);
+    assert!(get_option_result.is_err());
 
     let value = JsValue::new(11);
     let minimum = 1.0;
     let maximum = 10.0;
     let fallback = Some(5.0);
     let get_option_result = default_number_option(&value, minimum, maximum, fallback, &mut context);
-    assert_eq!(get_option_result.is_err(), true);
+    assert!(get_option_result.is_err());
 
     let value_f64 = 7.0;
     let value = JsValue::new(value_f64);
@@ -375,34 +375,22 @@ fn get_opt() {
     let maximum = 10.0;
     let fallback_val = 5.0;
     let fallback = Some(fallback_val);
-    let get_option_result = get_number_option(
-        &options,
-        &property,
-        minimum,
-        maximum,
-        fallback,
-        &mut context,
-    );
+    let get_option_result =
+        get_number_option(&options, property, minimum, maximum, fallback, &mut context);
     assert_eq!(get_option_result, Ok(fallback));
 
     let options = JsObject::empty();
     let value_f64 = 8.0;
     let value = JsValue::new(value_f64);
     let property = "fractionalSecondDigits";
     options
-        .set(property, value.clone(), true, &mut context)
+        .set(property, value, true, &mut context)
         .expect("Setting a property should not fail");
     let minimum = 1.0;
     let maximum = 10.0;
     let fallback = Some(5.0);
-    let get_option_result = get_number_option(
-        &options,
-        &property,
-        minimum,
-        maximum,
-        fallback,
-        &mut context,
-    );
+    let get_option_result =
+        get_number_option(&options, property, minimum, maximum, fallback, &mut context);
     assert_eq!(get_option_result, Ok(Some(value_f64)));
 }
 
@@ -420,7 +408,7 @@ fn to_date_time_opts() {
         &DateTimeReqs::Date,
         &mut context,
     );
-    assert_eq!(date_time_opts.is_err(), true);
+    assert!(date_time_opts.is_err());
 
     let options_obj = JsObject::empty();
     options_obj
@@ -432,7 +420,7 @@ fn to_date_time_opts() {
         &DateTimeReqs::Time,
         &mut context,
     );
-    assert_eq!(date_time_opts.is_err(), true);
+    assert!(date_time_opts.is_err());
 
     let date_time_opts = to_date_time_options(
         &JsValue::undefined(),
@@ -453,7 +441,7 @@ fn to_date_time_opts() {
     );
     assert_eq!(
         date_time_opts.get("day", &mut context),
-        Ok(numeric_jsstring.clone())
+        Ok(numeric_jsstring)
     );
 
     let date_time_opts = to_date_time_options(
@@ -475,7 +463,7 @@ fn to_date_time_opts() {
     );
     assert_eq!(
         date_time_opts.get("second", &mut context),
-        Ok(numeric_jsstring.clone())
+        Ok(numeric_jsstring)
     );
 
     let date_time_opts = to_date_time_options(
@@ -509,6 +497,6 @@ fn to_date_time_opts() {
     );
     assert_eq!(
         date_time_opts.get("second", &mut context),
-        Ok(numeric_jsstring.clone())
+        Ok(numeric_jsstring)
     );
 }

boa_engine/src/builtins/typed_array/mod.rs

@@ -3438,22 +3438,22 @@ impl TypedArrayKind {
     #[inline]
     pub(crate) const fn name(&self) -> &str {
         match self {
-            TypedArrayKind::Int8 => "Int8Array",
-            TypedArrayKind::Uint8 => "Uint8Array",
-            TypedArrayKind::Uint8Clamped => "Uint8ClampedArray",
-            TypedArrayKind::Int16 => "Int16Array",
-            TypedArrayKind::Uint16 => "Uint16Array",
-            TypedArrayKind::Int32 => "Int32Array",
-            TypedArrayKind::Uint32 => "Uint32Array",
-            TypedArrayKind::BigInt64 => "BigInt64Array",
-            TypedArrayKind::BigUint64 => "BigUint64Array",
-            TypedArrayKind::Float32 => "Float32Array",
-            TypedArrayKind::Float64 => "Float64Array",
+            Self::Int8 => "Int8Array",
+            Self::Uint8 => "Uint8Array",
+            Self::Uint8Clamped => "Uint8ClampedArray",
+            Self::Int16 => "Int16Array",
+            Self::Uint16 => "Uint16Array",
+            Self::Int32 => "Int32Array",
+            Self::Uint32 => "Uint32Array",
+            Self::BigInt64 => "BigInt64Array",
+            Self::BigUint64 => "BigUint64Array",
+            Self::Float32 => "Float32Array",
+            Self::Float64 => "Float64Array",
         }
     }
 
     pub(crate) fn is_big_int_element_type(self) -> bool {
-        matches!(self, TypedArrayKind::BigUint64 | TypedArrayKind::BigInt64)
+        matches!(self, Self::BigUint64 | Self::BigInt64)
     }
 }
 

boa_engine/src/lib.rs

@@ -26,7 +26,6 @@
     clippy::all,
     clippy::cast_lossless,
     clippy::redundant_closure_for_method_calls,
-    clippy::use_self,
     clippy::unnested_or_patterns,
     clippy::trivially_copy_pass_by_ref,
     clippy::needless_pass_by_value,
@@ -49,6 +48,7 @@
     nonstandard_style,
 )]
 #![allow(
+    clippy::use_self, // TODO: deny once false positives are fixed
     clippy::module_name_repetitions,
     clippy::cast_possible_truncation,
     clippy::cast_sign_loss,
@@ -99,7 +99,6 @@ pub use crate::{
 };
 
 /// The result of a Javascript expression is represented like this so it can succeed (`Ok`) or fail (`Err`)
-#[must_use]
 pub type JsResult<T> = StdResult<T, JsValue>;
 
 /// Execute the code using an existing `Context`.

boa_engine/src/syntax/ast/keyword.rs

@@ -485,8 +485,8 @@ impl Keyword {
     /// Gets the keyword as a binary operation, if this keyword is the `in` keyword.
     pub fn as_binop(self) -> Option<BinOp> {
         match self {
-            Keyword::In => Some(BinOp::Comp(CompOp::In)),
-            Keyword::InstanceOf => Some(BinOp::Comp(CompOp::InstanceOf)),
+            Self::In => Some(BinOp::Comp(CompOp::In)),
+            Self::InstanceOf => Some(BinOp::Comp(CompOp::InstanceOf)),
             _ => None,
         }
     }

boa_engine/src/syntax/ast/node/declaration/mod.rs

@@ -546,8 +546,8 @@ pub enum BindingPatternTypeObject {
 impl ToInternedString for BindingPatternTypeObject {
     fn to_interned_string(&self, interner: &Interner) -> String {
         match self {
-            BindingPatternTypeObject::Empty => String::new(),
-            BindingPatternTypeObject::SingleName {
+            Self::Empty => String::new(),
+            Self::SingleName {
                 ident,
                 property_name,
                 default_init,
@@ -576,18 +576,18 @@ impl ToInternedString for BindingPatternTypeObject {
                 }
                 buf
             }
-            BindingPatternTypeObject::RestProperty {
+            Self::RestProperty {
                 ident: property_name,
                 excluded_keys: _,
             } => {
                 format!(" ... {}", interner.resolve_expect(*property_name))
             }
-            BindingPatternTypeObject::RestGetConstField {
+            Self::RestGetConstField {
                 get_const_field, ..
             } => {
                 format!(" ... {}", get_const_field.to_interned_string(interner))
             }
-            BindingPatternTypeObject::BindingPattern {
+            Self::BindingPattern {
                 ident: property_name,
                 pattern,
                 default_init,
@@ -733,9 +733,9 @@ pub enum BindingPatternTypeArray {
 impl ToInternedString for BindingPatternTypeArray {
     fn to_interned_string(&self, interner: &Interner) -> String {
         match self {
-            BindingPatternTypeArray::Empty => String::new(),
-            BindingPatternTypeArray::Elision => " ".to_owned(),
-            BindingPatternTypeArray::SingleName {
+            Self::Empty => String::new(),
+            Self::Elision => " ".to_owned(),
+            Self::SingleName {
                 ident,
                 default_init,
             } => {
@@ -745,25 +745,25 @@ impl ToInternedString for BindingPatternTypeArray {
                 }
                 buf
             }
-            BindingPatternTypeArray::GetField { get_field } => {
+            Self::GetField { get_field } => {
                 format!(" {}", get_field.to_interned_string(interner))
             }
-            BindingPatternTypeArray::GetConstField { get_const_field } => {
+            Self::GetConstField { get_const_field } => {
                 format!(" {}", get_const_field.to_interned_string(interner))
             }
-            BindingPatternTypeArray::BindingPattern { pattern } => {
+            Self::BindingPattern { pattern } => {
                 format!(" {}", pattern.to_interned_string(interner))
             }
-            BindingPatternTypeArray::SingleNameRest { ident } => {
+            Self::SingleNameRest { ident } => {
                 format!(" ... {}", interner.resolve_expect(*ident))
             }
-            BindingPatternTypeArray::GetFieldRest { get_field } => {
+            Self::GetFieldRest { get_field } => {
                 format!(" ... {}", get_field.to_interned_string(interner))
             }
-            BindingPatternTypeArray::GetConstFieldRest { get_const_field } => {
+            Self::GetConstFieldRest { get_const_field } => {
                 format!(" ... {}", get_const_field.to_interned_string(interner))
             }
-            BindingPatternTypeArray::BindingPatternRest { pattern } => {
+            Self::BindingPatternRest { pattern } => {
                 format!(" ... {}", pattern.to_interned_string(interner))
             }
         }

boa_engine/src/value/equality.rs

@@ -189,11 +189,11 @@ impl JsValue {
     fn same_value_non_numeric(x: &Self, y: &Self) -> bool {
         debug_assert!(x.get_type() == y.get_type());
         match (x, y) {
-            (JsValue::Null, JsValue::Null) | (JsValue::Undefined, JsValue::Undefined) => true,
-            (JsValue::String(ref x), JsValue::String(ref y)) => x == y,
-            (JsValue::Boolean(x), JsValue::Boolean(y)) => x == y,
-            (JsValue::Object(ref x), JsValue::Object(ref y)) => JsObject::equals(x, y),
-            (JsValue::Symbol(ref x), JsValue::Symbol(ref y)) => x == y,
+            (Self::Null, Self::Null) | (Self::Undefined, Self::Undefined) => true,
+            (Self::String(ref x), Self::String(ref y)) => x == y,
+            (Self::Boolean(x), Self::Boolean(y)) => x == y,
+            (Self::Object(ref x), Self::Object(ref y)) => JsObject::equals(x, y),
+            (Self::Symbol(ref x), Self::Symbol(ref y)) => x == y,
             _ => false,
         }
     }