diff --git a/components/style/counter_style/mod.rs b/components/style/counter_style/mod.rs
index 59556a04a88..a346f9d21af 100644
--- a/components/style/counter_style/mod.rs
+++ b/components/style/counter_style/mod.rs
@@ -370,7 +370,7 @@ impl Parse for System {
             "symbolic" => Ok(System::Symbolic),
             "additive" => Ok(System::Additive),
             "fixed" => {
-                let first_symbol_value = input.r#try(|i| Integer::parse(context, i)).ok();
+                let first_symbol_value = input.try(|i| Integer::parse(context, i)).ok();
                 Ok(System::Fixed { first_symbol_value: first_symbol_value })
             }
             "extends" => {
@@ -457,7 +457,7 @@ impl Parse for Negative {
     ) -> Result<Self, ParseError<'i>> {
         Ok(Negative(
             Symbol::parse(context, input)?,
-            input.r#try(|input| Symbol::parse(context, input)).ok(),
+            input.try(|input| Symbol::parse(context, input)).ok(),
         ))
     }
 }
@@ -483,7 +483,7 @@ impl Parse for Ranges {
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
         if input
-            .r#try(|input| input.expect_ident_matching("auto"))
+            .try(|input| input.expect_ident_matching("auto"))
             .is_ok()
         {
             Ok(Ranges(Vec::new()))
@@ -512,7 +512,7 @@ fn parse_bound<'i, 't>(
     context: &ParserContext,
     input: &mut Parser<'i, 't>,
 ) -> Result<CounterBound, ParseError<'i>> {
-    if let Ok(integer) = input.r#try(|input| Integer::parse(context, input)) {
+    if let Ok(integer) = input.try(|input| Integer::parse(context, input)) {
         return Ok(CounterBound::Integer(integer));
     }
     input.expect_ident_matching("infinite")?;
@@ -556,7 +556,7 @@ impl Parse for Pad {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        let pad_with = input.r#try(|input| Symbol::parse(context, input));
+        let pad_with = input.try(|input| Symbol::parse(context, input));
         let min_length = Integer::parse_non_negative(context, input)?;
         let pad_with = pad_with.or_else(|_| Symbol::parse(context, input))?;
         Ok(Pad(min_length, pad_with))
@@ -588,7 +588,7 @@ impl Parse for Symbols {
     ) -> Result<Self, ParseError<'i>> {
         let mut symbols = Vec::new();
         loop {
-            if let Ok(s) = input.r#try(|input| Symbol::parse(context, input)) {
+            if let Ok(s) = input.try(|input| Symbol::parse(context, input)) {
                 symbols.push(s)
             } else {
                 if symbols.is_empty() {
@@ -640,7 +640,7 @@ impl Parse for AdditiveTuple {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        let symbol = input.r#try(|input| Symbol::parse(context, input));
+        let symbol = input.try(|input| Symbol::parse(context, input));
         let weight = Integer::parse_non_negative(context, input)?;
         let symbol = symbol.or_else(|_| Symbol::parse(context, input))?;
         Ok(AdditiveTuple {
@@ -673,7 +673,7 @@ impl Parse for SpeakAs {
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
         let mut is_spell_out = false;
-        let result = input.r#try(|input| {
+        let result = input.try(|input| {
             let ident = input.expect_ident().map_err(|_| ())?;
             match_ignore_ascii_case! { &*ident,
                 "auto" => Ok(SpeakAs::Auto),
diff --git a/components/style/custom_properties.rs b/components/style/custom_properties.rs
index 5bd97241b67..31c3dc207f5 100644
--- a/components/style/custom_properties.rs
+++ b/components/style/custom_properties.rs
@@ -553,7 +553,7 @@ fn parse_var_function<'i, 't>(
     let name = parse_name(&name).map_err(|()| {
         input.new_custom_error(SelectorParseErrorKind::UnexpectedIdent(name.clone()))
     })?;
-    if input.r#try(|input| input.expect_comma()).is_ok() {
+    if input.try(|input| input.expect_comma()).is_ok() {
         parse_fallback(input)?;
     }
     if let Some(refs) = references {
@@ -569,7 +569,7 @@ fn parse_env_function<'i, 't>(
     // TODO(emilio): This should be <custom-ident> per spec, but no other
     // browser does that, see https://github.com/w3c/csswg-drafts/issues/3262.
     input.expect_ident()?;
-    if input.r#try(|input| input.expect_comma()).is_ok() {
+    if input.try(|input| input.expect_comma()).is_ok() {
         parse_fallback(input)?;
     }
     if let Some(references) = references {
diff --git a/components/style/font_face.rs b/components/style/font_face.rs
index 92444b7b145..8b3e3c865cb 100644
--- a/components/style/font_face.rs
+++ b/components/style/font_face.rs
@@ -120,7 +120,7 @@ macro_rules! impl_range {
             ) -> Result<Self, ParseError<'i>> {
                 let first = $component::parse(context, input)?;
                 let second = input
-                    .r#try(|input| $component::parse(context, input))
+                    .try(|input| $component::parse(context, input))
                     .unwrap_or_else(|_| first.clone());
                 Ok($range(first, second))
             }
@@ -234,7 +234,7 @@ impl Parse for FontStyle {
             GenericFontStyle::Italic => FontStyle::Italic,
             GenericFontStyle::Oblique(angle) => {
                 let second_angle = input
-                    .r#try(|input| SpecifiedFontStyle::parse_angle(context, input))
+                    .try(|input| SpecifiedFontStyle::parse_angle(context, input))
                     .unwrap_or_else(|_| angle.clone());
 
                 FontStyle::Oblique(angle, second_angle)
@@ -380,7 +380,7 @@ impl Parse for Source {
         input: &mut Parser<'i, 't>,
     ) -> Result<Source, ParseError<'i>> {
         if input
-            .r#try(|input| input.expect_function_matching("local"))
+            .try(|input| input.expect_function_matching("local"))
             .is_ok()
         {
             return input
@@ -392,7 +392,7 @@ impl Parse for Source {
 
         // Parsing optional format()
         let format_hints = if input
-            .r#try(|input| input.expect_function_matching("format"))
+            .try(|input| input.expect_function_matching("format"))
             .is_ok()
         {
             input.parse_nested_block(|input| {
diff --git a/components/style/media_queries/media_condition.rs b/components/style/media_queries/media_condition.rs
index c0b8f49b566..b7da1503b33 100644
--- a/components/style/media_queries/media_condition.rs
+++ b/components/style/media_queries/media_condition.rs
@@ -114,7 +114,7 @@ impl MediaCondition {
 
         // ParenthesisBlock.
         let first_condition = Self::parse_paren_block(context, input)?;
-        let operator = match input.r#try(Operator::parse) {
+        let operator = match input.try(Operator::parse) {
             Ok(op) => op,
             Err(..) => return Ok(first_condition),
         };
@@ -133,7 +133,7 @@ impl MediaCondition {
         };
 
         loop {
-            if input.r#try(|i| i.expect_ident_matching(delim)).is_err() {
+            if input.try(|i| i.expect_ident_matching(delim)).is_err() {
                 return Ok(MediaCondition::Operation(
                     conditions.into_boxed_slice(),
                     operator,
@@ -159,7 +159,7 @@ impl MediaCondition {
     ) -> Result<Self, ParseError<'i>> {
         input.parse_nested_block(|input| {
             // Base case.
-            if let Ok(inner) = input.r#try(|i| Self::parse(context, i)) {
+            if let Ok(inner) = input.try(|i| Self::parse(context, i)) {
                 return Ok(MediaCondition::InParens(Box::new(inner)));
             }
             let expr = MediaFeatureExpression::parse_in_parenthesis_block(context, input)?;
diff --git a/components/style/media_queries/media_feature_expression.rs b/components/style/media_queries/media_feature_expression.rs
index 67c1f3b527a..b6bfc03179d 100644
--- a/components/style/media_queries/media_feature_expression.rs
+++ b/components/style/media_queries/media_feature_expression.rs
@@ -221,14 +221,14 @@ fn consume_operation_or_colon(input: &mut Parser) -> Result<Option<Operator>, ()
     Ok(Some(match first_delim {
         '=' => Operator::Equal,
         '>' => {
-            if input.r#try(|i| i.expect_delim('=')).is_ok() {
+            if input.try(|i| i.expect_delim('=')).is_ok() {
                 Operator::GreaterThanEqual
             } else {
                 Operator::GreaterThan
             }
         },
         '<' => {
-            if input.r#try(|i| i.expect_delim('=')).is_ok() {
+            if input.try(|i| i.expect_delim('=')).is_ok() {
                 Operator::LessThanEqual
             } else {
                 Operator::LessThan
@@ -350,7 +350,7 @@ impl MediaFeatureExpression {
             }
         }
 
-        let operator = input.r#try(consume_operation_or_colon);
+        let operator = input.try(consume_operation_or_colon);
         let operator = match operator {
             Err(..) => {
                 // If there's no colon, this is a media query of the
diff --git a/components/style/media_queries/media_query.rs b/components/style/media_queries/media_query.rs
index 61e2e06c573..88ad288bf3b 100644
--- a/components/style/media_queries/media_query.rs
+++ b/components/style/media_queries/media_query.rs
@@ -125,8 +125,8 @@ impl MediaQuery {
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
         let (qualifier, explicit_media_type) = input
-            .r#try(|input| -> Result<_, ()> {
-                let qualifier = input.r#try(Qualifier::parse).ok();
+            .try(|input| -> Result<_, ()> {
+                let qualifier = input.try(Qualifier::parse).ok();
                 let ident = input.expect_ident().map_err(|_| ())?;
                 let media_type = MediaQueryType::parse(&ident)?;
                 Ok((qualifier, Some(media_type)))
@@ -135,7 +135,7 @@ impl MediaQuery {
 
         let condition = if explicit_media_type.is_none() {
             Some(MediaCondition::parse(context, input)?)
-        } else if input.r#try(|i| i.expect_ident_matching("and")).is_ok() {
+        } else if input.try(|i| i.expect_ident_matching("and")).is_ok() {
             Some(MediaCondition::parse_disallow_or(context, input)?)
         } else {
             None
diff --git a/components/style/stylesheets/document_rule.rs b/components/style/stylesheets/document_rule.rs
index f0389b8fec9..6a3571910be 100644
--- a/components/style/stylesheets/document_rule.rs
+++ b/components/style/stylesheets/document_rule.rs
@@ -135,7 +135,7 @@ impl DocumentMatchingFunction {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(url) = input.r#try(|input| CssUrl::parse(context, input)) {
+        if let Ok(url) = input.try(|input| CssUrl::parse(context, input)) {
             return Ok(DocumentMatchingFunction::Url(url));
         }
 
diff --git a/components/style/stylesheets/rule_parser.rs b/components/style/stylesheets/rule_parser.rs
index afb6debc1e1..bb51536d3f1 100644
--- a/components/style/stylesheets/rule_parser.rs
+++ b/components/style/stylesheets/rule_parser.rs
@@ -202,7 +202,7 @@ impl<'a, 'i> AtRuleParser<'i> for TopLevelRuleParser<'a> {
                     return Err(input.new_custom_error(StyleParseErrorKind::UnexpectedNamespaceRule))
                 }
 
-                let prefix = input.r#try(|i| i.expect_ident_cloned())
+                let prefix = input.try(|i| i.expect_ident_cloned())
                                   .map(|s| Prefix::from(s.as_ref())).ok();
                 let maybe_namespace = match input.expect_url_or_string() {
                     Ok(url_or_string) => url_or_string,
diff --git a/components/style/stylesheets/supports_rule.rs b/components/style/stylesheets/supports_rule.rs
index 10033d324a4..bc49b95238b 100644
--- a/components/style/stylesheets/supports_rule.rs
+++ b/components/style/stylesheets/supports_rule.rs
@@ -103,7 +103,7 @@ impl SupportsCondition {
     ///
     /// <https://drafts.csswg.org/css-conditional/#supports_condition>
     pub fn parse<'i, 't>(input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i>> {
-        if input.r#try(|i| i.expect_ident_matching("not")).is_ok() {
+        if input.try(|i| i.expect_ident_matching("not")).is_ok() {
             let inner = SupportsCondition::parse_in_parens(input)?;
             return Ok(SupportsCondition::Not(Box::new(inner)));
         }
@@ -129,7 +129,7 @@ impl SupportsCondition {
         loop {
             conditions.push(SupportsCondition::parse_in_parens(input)?);
             if input
-                .r#try(|input| input.expect_ident_matching(keyword))
+                .try(|input| input.expect_ident_matching(keyword))
                 .is_err()
             {
                 // Did not find the expected keyword.
@@ -175,20 +175,20 @@ impl SupportsCondition {
     fn parse_in_parens<'i, 't>(input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i>> {
         // Whitespace is normally taken care of in `Parser::next`,
         // but we want to not include it in `pos` for the SupportsCondition::FutureSyntax cases.
-        while input.r#try(Parser::expect_whitespace).is_ok() {}
+        while input.try(Parser::expect_whitespace).is_ok() {}
         let pos = input.position();
         let location = input.current_source_location();
         // FIXME: remove clone() when lifetimes are non-lexical
         match input.next()?.clone() {
             Token::ParenthesisBlock => {
                 let nested =
-                    input.r#try(|input| input.parse_nested_block(parse_condition_or_declaration));
+                    input.try(|input| input.parse_nested_block(parse_condition_or_declaration));
                 if nested.is_ok() {
                     return nested;
                 }
             },
             Token::Function(ident) => {
-                let nested = input.r#try(|input| {
+                let nested = input.try(|input| {
                     input.parse_nested_block(|input| {
                         SupportsCondition::parse_functional(&ident, input)
                     })
@@ -240,7 +240,7 @@ fn eval_moz_bool_pref(_: &CStr, _: &ParserContext) -> bool {
 pub fn parse_condition_or_declaration<'i, 't>(
     input: &mut Parser<'i, 't>,
 ) -> Result<SupportsCondition, ParseError<'i>> {
-    if let Ok(condition) = input.r#try(SupportsCondition::parse) {
+    if let Ok(condition) = input.try(SupportsCondition::parse) {
         Ok(SupportsCondition::Parenthesized(Box::new(condition)))
     } else {
         Declaration::parse(input).map(SupportsCondition::Declaration)
@@ -418,7 +418,7 @@ impl Declaration {
                     PropertyDeclaration::parse_into(&mut declarations, id, &context, input)
                         .map_err(|_| input.new_custom_error(()))
                 })?;
-                let _ = input.r#try(parse_important);
+                let _ = input.try(parse_important);
                 Ok(())
             })
             .is_ok()
diff --git a/components/style/stylesheets/viewport_rule.rs b/components/style/stylesheets/viewport_rule.rs
index de2fd55fb7b..ef2d58ecf0d 100644
--- a/components/style/stylesheets/viewport_rule.rs
+++ b/components/style/stylesheets/viewport_rule.rs
@@ -265,7 +265,7 @@ fn parse_shorthand<'i, 't>(
     input: &mut Parser<'i, 't>,
 ) -> Result<(ViewportLength, ViewportLength), ParseError<'i>> {
     let min = ViewportLength::parse(context, input)?;
-    match input.r#try(|i| ViewportLength::parse(context, i)) {
+    match input.try(|i| ViewportLength::parse(context, i)) {
         Err(_) => Ok((min.clone(), min)),
         Ok(max) => Ok((min, max)),
     }
@@ -289,8 +289,8 @@ impl<'a, 'b, 'i> DeclarationParser<'i> for ViewportRuleParser<'a, 'b> {
     ) -> Result<Vec<ViewportDescriptorDeclaration>, ParseError<'i>> {
         macro_rules! declaration {
             ($declaration:ident($parse:expr)) => {
-                declaration!($declaration(value: r#try!($parse(input)),
-                                          important: input.r#try(parse_important).is_ok()))
+                declaration!($declaration(value: try!($parse(input)),
+                                          important: input.try(parse_important).is_ok()))
             };
             ($declaration:ident(value: $value:expr, important: $important:expr)) => {
                 ViewportDescriptorDeclaration::new(
@@ -306,7 +306,7 @@ impl<'a, 'b, 'i> DeclarationParser<'i> for ViewportRuleParser<'a, 'b> {
             };
             (shorthand -> [$min:ident, $max:ident]) => {{
                 let shorthand = parse_shorthand(self.context, input)?;
-                let important = input.r#try(parse_important).is_ok();
+                let important = input.try(parse_important).is_ok();
 
                 Ok(vec![
                     declaration!($min(value: shorthand.0, important: important)),
diff --git a/components/style/values/computed/font.rs b/components/style/values/computed/font.rs
index a60eb82f0d2..ec3305be277 100644
--- a/components/style/values/computed/font.rs
+++ b/components/style/values/computed/font.rs
@@ -374,7 +374,7 @@ impl SingleFontFamily {
 
     /// Parse a font-family value
     pub fn parse<'i, 't>(input: &mut Parser<'i, 't>) -> Result<Self, ParseError<'i>> {
-        if let Ok(value) = input.r#try(|i| i.expect_string_cloned()) {
+        if let Ok(value) = input.try(|i| i.expect_string_cloned()) {
             return Ok(SingleFontFamily::FamilyName(FamilyName {
                 name: Atom::from(&*value),
                 syntax: FamilyNameSyntax::Quoted,
@@ -419,7 +419,7 @@ impl SingleFontFamily {
             value.push(' ');
             value.push_str(&ident);
         }
-        while let Ok(ident) = input.r#try(|i| i.expect_ident_cloned()) {
+        while let Ok(ident) = input.try(|i| i.expect_ident_cloned()) {
             value.push(' ');
             value.push_str(&ident);
         }
diff --git a/components/style/values/generics/font.rs b/components/style/values/generics/font.rs
index 204de699db3..7f62b15dd3c 100644
--- a/components/style/values/generics/font.rs
+++ b/components/style/values/generics/font.rs
@@ -85,7 +85,7 @@ impl<T: Parse> Parse for FontSettings<T> {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if input.r#try(|i| i.expect_ident_matching("normal")).is_ok() {
+        if input.try(|i| i.expect_ident_matching("normal")).is_ok() {
             return Ok(Self::normal());
         }
 
diff --git a/components/style/values/generics/grid.rs b/components/style/values/generics/grid.rs
index c565ca6c320..8a26cbd2b16 100644
--- a/components/style/values/generics/grid.rs
+++ b/components/style/values/generics/grid.rs
@@ -86,7 +86,7 @@ impl Parse for GridLine<specified::Integer> {
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
         let mut grid_line = Self::auto();
-        if input.r#try(|i| i.expect_ident_matching("auto")).is_ok() {
+        if input.try(|i| i.expect_ident_matching("auto")).is_ok() {
             return Ok(grid_line);
         }
 
@@ -99,7 +99,7 @@ impl Parse for GridLine<specified::Integer> {
         for _ in 0..3 {
             // Maximum possible entities for <grid-line>
             let location = input.current_source_location();
-            if input.r#try(|i| i.expect_ident_matching("span")).is_ok() {
+            if input.try(|i| i.expect_ident_matching("span")).is_ok() {
                 if grid_line.is_span {
                     return Err(location.new_custom_error(StyleParseErrorKind::UnspecifiedError));
                 }
@@ -109,14 +109,14 @@ impl Parse for GridLine<specified::Integer> {
                 }
 
                 grid_line.is_span = true;
-            } else if let Ok(i) = input.r#try(|i| specified::Integer::parse(context, i)) {
+            } else if let Ok(i) = input.try(|i| specified::Integer::parse(context, i)) {
                 // FIXME(emilio): Probably shouldn't reject if it's calc()...
                 if i.value() == 0 || val_before_span || grid_line.line_num.is_some() {
                     return Err(location.new_custom_error(StyleParseErrorKind::UnspecifiedError));
                 }
 
                 grid_line.line_num = Some(i);
-            } else if let Ok(name) = input.r#try(|i| i.expect_ident_cloned()) {
+            } else if let Ok(name) = input.try(|i| i.expect_ident_cloned()) {
                 if val_before_span || grid_line.ident.is_some() {
                     return Err(location.new_custom_error(StyleParseErrorKind::UnspecifiedError));
                 }
@@ -375,7 +375,7 @@ impl Parse for RepeatCount<specified::Integer> {
     ) -> Result<Self, ParseError<'i>> {
         // Maximum number of repeat is 10000. The greater numbers should be clamped.
         const MAX_LINE: i32 = 10000;
-        if let Ok(mut i) = input.r#try(|i| specified::Integer::parse_positive(context, i)) {
+        if let Ok(mut i) = input.try(|i| specified::Integer::parse_positive(context, i)) {
             if i.value() > MAX_LINE {
                 i = specified::Integer::new(MAX_LINE);
             }
@@ -605,14 +605,14 @@ impl Parse for LineNameList {
         let mut fill_idx = None;
 
         loop {
-            let repeat_parse_result = input.r#try(|input| {
+            let repeat_parse_result = input.try(|input| {
                 input.expect_function_matching("repeat")?;
                 input.parse_nested_block(|input| {
                     let count = RepeatCount::parse(context, input)?;
                     input.expect_comma()?;
                     let mut names_list = vec![];
                     names_list.push(parse_line_names(input)?); // there should be at least one
-                    while let Ok(names) = input.r#try(parse_line_names) {
+                    while let Ok(names) = input.try(parse_line_names) {
                         names_list.push(names);
                     }
 
@@ -643,7 +643,7 @@ impl Parse for LineNameList {
                     },
                     _ => return Err(input.new_custom_error(StyleParseErrorKind::UnspecifiedError)),
                 }
-            } else if let Ok(names) = input.r#try(parse_line_names) {
+            } else if let Ok(names) = input.try(parse_line_names) {
                 line_names.push(names);
             } else {
                 break;
diff --git a/components/style/values/generics/mod.rs b/components/style/values/generics/mod.rs
index f1c5acd602e..862ebef459f 100644
--- a/components/style/values/generics/mod.rs
+++ b/components/style/values/generics/mod.rs
@@ -111,19 +111,16 @@ impl Parse for CounterStyleOrNone {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(name) = input.r#try(|i| parse_counter_style_name(i)) {
+        if let Ok(name) = input.try(|i| parse_counter_style_name(i)) {
             return Ok(CounterStyleOrNone::Name(name));
         }
-        if input.r#try(|i| i.expect_ident_matching("none")).is_ok() {
+        if input.try(|i| i.expect_ident_matching("none")).is_ok() {
             return Ok(CounterStyleOrNone::None);
         }
-        if input
-            .r#try(|i| i.expect_function_matching("symbols"))
-            .is_ok()
-        {
+        if input.try(|i| i.expect_function_matching("symbols")).is_ok() {
             return input.parse_nested_block(|input| {
                 let symbols_type = input
-                    .r#try(|i| SymbolsType::parse(i))
+                    .try(|i| SymbolsType::parse(i))
                     .unwrap_or(SymbolsType::Symbolic);
                 let symbols = Symbols::parse(context, input)?;
                 // There must be at least two symbols for alphabetic or
diff --git a/components/style/values/generics/rect.rs b/components/style/values/generics/rect.rs
index 6ba11570dfe..fa5caab3e4b 100644
--- a/components/style/values/generics/rect.rs
+++ b/components/style/values/generics/rect.rs
@@ -50,7 +50,7 @@ where
         Parse: Fn(&ParserContext, &mut Parser<'i, 't>) -> Result<T, ParseError<'i>>,
     {
         let first = parse(context, input)?;
-        let second = if let Ok(second) = input.r#try(|i| parse(context, i)) {
+        let second = if let Ok(second) = input.try(|i| parse(context, i)) {
             second
         } else {
             // <first>
@@ -61,13 +61,13 @@ where
                 first,
             ));
         };
-        let third = if let Ok(third) = input.r#try(|i| parse(context, i)) {
+        let third = if let Ok(third) = input.try(|i| parse(context, i)) {
             third
         } else {
             // <first> <second>
             return Ok(Self::new(first.clone(), second.clone(), first, second));
         };
-        let fourth = if let Ok(fourth) = input.r#try(|i| parse(context, i)) {
+        let fourth = if let Ok(fourth) = input.try(|i| parse(context, i)) {
             fourth
         } else {
             // <first> <second> <third>
diff --git a/components/style/values/generics/size.rs b/components/style/values/generics/size.rs
index 24fba15d59c..7271aaa3922 100644
--- a/components/style/values/generics/size.rs
+++ b/components/style/values/generics/size.rs
@@ -55,7 +55,7 @@ impl<L> Size<L> {
     {
         let first = parse_one(context, input)?;
         let second = input
-            .r#try(|i| parse_one(context, i))
+            .try(|i| parse_one(context, i))
             .unwrap_or_else(|_| first.clone());
         Ok(Self::new(first, second))
     }
diff --git a/components/style/values/generics/svg.rs b/components/style/values/generics/svg.rs
index cdbca333441..1b439657def 100644
--- a/components/style/values/generics/svg.rs
+++ b/components/style/values/generics/svg.rs
@@ -84,10 +84,10 @@ fn parse_fallback<'i, 't, ColorType: Parse>(
     context: &ParserContext,
     input: &mut Parser<'i, 't>,
 ) -> Option<Either<ColorType, None_>> {
-    if input.r#try(|i| i.expect_ident_matching("none")).is_ok() {
+    if input.try(|i| i.expect_ident_matching("none")).is_ok() {
         Some(Either::Second(None_))
     } else {
-        if let Ok(color) = input.r#try(|i| ColorType::parse(context, i)) {
+        if let Ok(color) = input.try(|i| ColorType::parse(context, i)) {
             Some(Either::First(color))
         } else {
             None
@@ -100,12 +100,12 @@ impl<ColorType: Parse, UrlPaintServer: Parse> Parse for SVGPaint<ColorType, UrlP
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(url) = input.r#try(|i| UrlPaintServer::parse(context, i)) {
+        if let Ok(url) = input.try(|i| UrlPaintServer::parse(context, i)) {
             Ok(SVGPaint {
                 kind: SVGPaintKind::PaintServer(url),
                 fallback: parse_fallback(context, input),
             })
-        } else if let Ok(kind) = input.r#try(SVGPaintKind::parse_ident) {
+        } else if let Ok(kind) = input.try(SVGPaintKind::parse_ident) {
             if let SVGPaintKind::None = kind {
                 Ok(SVGPaint {
                     kind: kind,
@@ -117,7 +117,7 @@ impl<ColorType: Parse, UrlPaintServer: Parse> Parse for SVGPaint<ColorType, UrlP
                     fallback: parse_fallback(context, input),
                 })
             }
-        } else if let Ok(color) = input.r#try(|i| ColorType::parse(context, i)) {
+        } else if let Ok(color) = input.try(|i| ColorType::parse(context, i)) {
             Ok(SVGPaint {
                 kind: SVGPaintKind::Color(color),
                 fallback: None,
@@ -158,7 +158,7 @@ impl<LengthOrPercentageType: Parse, NumberType: Parse> Parse
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(num) = input.r#try(|i| NumberType::parse(context, i)) {
+        if let Ok(num) = input.try(|i| NumberType::parse(context, i)) {
             return Ok(SvgLengthOrPercentageOrNumber::Number(num));
         }
 
diff --git a/components/style/values/generics/text.rs b/components/style/values/generics/text.rs
index 0be499c6933..ccd5c192270 100644
--- a/components/style/values/generics/text.rs
+++ b/components/style/values/generics/text.rs
@@ -58,7 +58,7 @@ impl<Value> Spacing<Value> {
     where
         F: FnOnce(&ParserContext, &mut Parser<'i, 't>) -> Result<Value, ParseError<'i>>,
     {
-        if input.r#try(|i| i.expect_ident_matching("normal")).is_ok() {
+        if input.try(|i| i.expect_ident_matching("normal")).is_ok() {
             return Ok(Spacing::Normal);
         }
         parse(context, input).map(Spacing::Value)
diff --git a/components/style/values/generics/url.rs b/components/style/values/generics/url.rs
index ccd50b235b9..51ad8055be1 100644
--- a/components/style/values/generics/url.rs
+++ b/components/style/values/generics/url.rs
@@ -44,7 +44,7 @@ where
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<UrlOrNone<Url>, ParseError<'i>> {
-        if let Ok(url) = input.r#try(|input| Url::parse(context, input)) {
+        if let Ok(url) = input.try(|input| Url::parse(context, input)) {
             return Ok(UrlOrNone::Url(url));
         }
         input.expect_ident_matching("none")?;
diff --git a/components/style/values/mod.rs b/components/style/values/mod.rs
index 9b78be371d3..a03875b96a8 100644
--- a/components/style/values/mod.rs
+++ b/components/style/values/mod.rs
@@ -155,7 +155,7 @@ impl<A: Parse, B: Parse> Parse for Either<A, B> {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Either<A, B>, ParseError<'i>> {
-        if let Ok(v) = input.r#try(|i| A::parse(context, i)) {
+        if let Ok(v) = input.try(|i| A::parse(context, i)) {
             Ok(Either::First(v))
         } else {
             B::parse(context, input).map(Either::Second)
diff --git a/components/style/values/specified/align.rs b/components/style/values/specified/align.rs
index 9e8fa8ecd40..8ab097c45bf 100644
--- a/components/style/values/specified/align.rs
+++ b/components/style/values/specified/align.rs
@@ -195,25 +195,25 @@ impl ContentDistribution {
         //      when this function is updated.
 
         // Try to parse normal first
-        if input.r#try(|i| i.expect_ident_matching("normal")).is_ok() {
+        if input.try(|i| i.expect_ident_matching("normal")).is_ok() {
             return Ok(ContentDistribution::normal());
         }
 
         // Parse <baseline-position>, but only on the block axis.
         if axis == AxisDirection::Block {
-            if let Ok(value) = input.r#try(parse_baseline) {
+            if let Ok(value) = input.try(parse_baseline) {
                 return Ok(ContentDistribution::new(value));
             }
         }
 
         // <content-distribution>
-        if let Ok(value) = input.r#try(parse_content_distribution) {
+        if let Ok(value) = input.try(parse_content_distribution) {
             return Ok(ContentDistribution::new(value));
         }
 
         // <overflow-position>? <content-position>
         let overflow_position = input
-            .r#try(parse_overflow_position)
+            .try(parse_overflow_position)
             .unwrap_or(AlignFlags::empty());
 
         let content_position = try_match_ident_ignore_ascii_case! { input,
@@ -358,18 +358,18 @@ impl SelfAlignment {
         //
         // It's weird that this accepts <baseline-position>, but not
         // justify-content...
-        if let Ok(value) = input.r#try(parse_baseline) {
+        if let Ok(value) = input.try(parse_baseline) {
             return Ok(SelfAlignment(value));
         }
 
         // auto | normal | stretch
-        if let Ok(value) = input.r#try(parse_auto_normal_stretch) {
+        if let Ok(value) = input.try(parse_auto_normal_stretch) {
             return Ok(SelfAlignment(value));
         }
 
         // <overflow-position>? <self-position>
         let overflow_position = input
-            .r#try(parse_overflow_position)
+            .try(parse_overflow_position)
             .unwrap_or(AlignFlags::empty());
         let self_position = parse_self_position(input, axis)?;
         Ok(SelfAlignment(overflow_position | self_position))
@@ -484,17 +484,17 @@ impl Parse for AlignItems {
         //      this function is updated.
 
         // <baseline-position>
-        if let Ok(baseline) = input.r#try(parse_baseline) {
+        if let Ok(baseline) = input.try(parse_baseline) {
             return Ok(AlignItems(baseline));
         }
 
         // normal | stretch
-        if let Ok(value) = input.r#try(parse_normal_stretch) {
+        if let Ok(value) = input.try(parse_normal_stretch) {
             return Ok(AlignItems(value));
         }
         // <overflow-position>? <self-position>
         let overflow = input
-            .r#try(parse_overflow_position)
+            .try(parse_overflow_position)
             .unwrap_or(AlignFlags::empty());
         let self_position = parse_self_position(input, AxisDirection::Block)?;
         Ok(AlignItems(self_position | overflow))
@@ -542,23 +542,23 @@ impl Parse for JustifyItems {
         //
         // It's weird that this accepts <baseline-position>, but not
         // justify-content...
-        if let Ok(baseline) = input.r#try(parse_baseline) {
+        if let Ok(baseline) = input.try(parse_baseline) {
             return Ok(JustifyItems(baseline));
         }
 
         // normal | stretch
-        if let Ok(value) = input.r#try(parse_normal_stretch) {
+        if let Ok(value) = input.try(parse_normal_stretch) {
             return Ok(JustifyItems(value));
         }
 
         // legacy | [ legacy && [ left | right | center ] ]
-        if let Ok(value) = input.r#try(parse_legacy) {
+        if let Ok(value) = input.try(parse_legacy) {
             return Ok(JustifyItems(value));
         }
 
         // <overflow-position>? <self-position>
         let overflow = input
-            .r#try(parse_overflow_position)
+            .try(parse_overflow_position)
             .unwrap_or(AlignFlags::empty());
         let self_position = parse_self_position(input, AxisDirection::Inline)?;
         Ok(JustifyItems(overflow | self_position))
@@ -714,7 +714,7 @@ fn parse_legacy<'i, 't>(input: &mut Parser<'i, 't>) -> Result<AlignFlags, ParseE
     //      when this function is updated.
     let flags = try_match_ident_ignore_ascii_case! { input,
         "legacy" => {
-            let flags = input.r#try(parse_left_right_center)
+            let flags = input.try(parse_left_right_center)
                 .unwrap_or(AlignFlags::empty());
 
             return Ok(AlignFlags::LEGACY | flags)
diff --git a/components/style/values/specified/background.rs b/components/style/values/specified/background.rs
index 29e1812dbbc..9aa47fb522c 100644
--- a/components/style/values/specified/background.rs
+++ b/components/style/values/specified/background.rs
@@ -19,9 +19,9 @@ impl Parse for BackgroundSize {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(width) = input.r#try(|i| NonNegativeLengthOrPercentageOrAuto::parse(context, i)) {
+        if let Ok(width) = input.try(|i| NonNegativeLengthOrPercentageOrAuto::parse(context, i)) {
             let height = input
-                .r#try(|i| NonNegativeLengthOrPercentageOrAuto::parse(context, i))
+                .try(|i| NonNegativeLengthOrPercentageOrAuto::parse(context, i))
                 .unwrap_or(NonNegativeLengthOrPercentageOrAuto::auto());
             return Ok(GenericBackgroundSize::Explicit { width, height });
         }
@@ -106,7 +106,7 @@ impl Parse for BackgroundRepeat {
             },
         };
 
-        let vertical = input.r#try(BackgroundRepeatKeyword::parse).ok();
+        let vertical = input.try(BackgroundRepeatKeyword::parse).ok();
         Ok(BackgroundRepeat::Keywords(horizontal, vertical))
     }
 }
diff --git a/components/style/values/specified/basic_shape.rs b/components/style/values/specified/basic_shape.rs
index 0631c7f0a7d..d394d8881dd 100644
--- a/components/style/values/specified/basic_shape.rs
+++ b/components/style/values/specified/basic_shape.rs
@@ -70,12 +70,12 @@ impl Parse for ClippingShape {
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
         if is_clip_path_path_enabled(context) {
-            if let Ok(p) = input.r#try(|i| Path::parse(context, i)) {
+            if let Ok(p) = input.try(|i| Path::parse(context, i)) {
                 return Ok(ShapeSource::Path(p));
             }
         }
 
-        if let Ok(url) = input.r#try(|i| SpecifiedUrl::parse(context, i)) {
+        if let Ok(url) = input.try(|i| SpecifiedUrl::parse(context, i)) {
             return Ok(ShapeSource::ImageOrUrl(url));
         }
 
@@ -89,7 +89,7 @@ impl Parse for FloatAreaShape {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(image) = input.r#try(|i| Image::parse_with_cors_anonymous(context, i)) {
+        if let Ok(image) = input.try(|i| Image::parse_with_cors_anonymous(context, i)) {
             return Ok(ShapeSource::ImageOrUrl(image));
         }
 
@@ -106,7 +106,7 @@ where
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if input.r#try(|i| i.expect_ident_matching("none")).is_ok() {
+        if input.try(|i| i.expect_ident_matching("none")).is_ok() {
             return Ok(ShapeSource::None);
         }
 
@@ -119,7 +119,7 @@ where
                 return false; // already parsed this component
             }
 
-            *component = input.r#try(|i| U::parse(context, i)).ok();
+            *component = input.try(|i| U::parse(context, i)).ok();
             component.is_some()
         }
 
@@ -147,7 +147,7 @@ impl Parse for GeometryBox {
         _context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(shape_box) = input.r#try(|i| ShapeBox::parse(i)) {
+        if let Ok(shape_box) = input.try(|i| ShapeBox::parse(i)) {
             return Ok(GeometryBox::ShapeBox(shape_box));
         }
 
@@ -197,7 +197,7 @@ impl InsetRect {
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
         let rect = Rect::parse_with(context, input, LengthOrPercentage::parse)?;
-        let round = if input.r#try(|i| i.expect_ident_matching("round")).is_ok() {
+        let round = if input.try(|i| i.expect_ident_matching("round")).is_ok() {
             Some(BorderRadius::parse(context, input)?)
         } else {
             None
@@ -225,9 +225,9 @@ impl Circle {
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
         let radius = input
-            .r#try(|i| ShapeRadius::parse(context, i))
+            .try(|i| ShapeRadius::parse(context, i))
             .unwrap_or_default();
-        let position = if input.r#try(|i| i.expect_ident_matching("at")).is_ok() {
+        let position = if input.try(|i| i.expect_ident_matching("at")).is_ok() {
             Position::parse(context, input)?
         } else {
             Position::center()
@@ -270,14 +270,14 @@ impl Ellipse {
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
         let (a, b) = input
-            .r#try(|i| -> Result<_, ParseError> {
+            .try(|i| -> Result<_, ParseError> {
                 Ok((
                     ShapeRadius::parse(context, i)?,
                     ShapeRadius::parse(context, i)?,
                 ))
             })
             .unwrap_or_default();
-        let position = if input.r#try(|i| i.expect_ident_matching("at")).is_ok() {
+        let position = if input.try(|i| i.expect_ident_matching("at")).is_ok() {
             Position::parse(context, input)?
         } else {
             Position::center()
@@ -315,7 +315,7 @@ impl Parse for ShapeRadius {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(lop) = input.r#try(|i| LengthOrPercentage::parse_non_negative(context, i)) {
+        if let Ok(lop) = input.try(|i| LengthOrPercentage::parse_non_negative(context, i)) {
             return Ok(generic::ShapeRadius::Length(lop));
         }
 
@@ -419,7 +419,7 @@ impl Polygon {
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
         let fill = input
-            .r#try(|i| -> Result<_, ParseError> {
+            .try(|i| -> Result<_, ParseError> {
                 let fill = FillRule::parse(i)?;
                 i.expect_comma()?; // only eat the comma if there is something before it
                 Ok(fill)
@@ -457,7 +457,7 @@ impl Path {
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
         let fill = input
-            .r#try(|i| -> Result<_, ParseError> {
+            .try(|i| -> Result<_, ParseError> {
                 let fill = FillRule::parse(i)?;
                 i.expect_comma()?;
                 Ok(fill)
diff --git a/components/style/values/specified/border.rs b/components/style/values/specified/border.rs
index 27b9355c21d..c64e5c99985 100644
--- a/components/style/values/specified/border.rs
+++ b/components/style/values/specified/border.rs
@@ -58,7 +58,7 @@ impl BorderSideWidth {
         allow_quirks: AllowQuirks,
     ) -> Result<Self, ParseError<'i>> {
         if let Ok(length) =
-            input.r#try(|i| Length::parse_non_negative_quirky(context, i, allow_quirks))
+            input.try(|i| Length::parse_non_negative_quirky(context, i, allow_quirks))
         {
             return Ok(BorderSideWidth::Length(length));
         }
@@ -115,11 +115,11 @@ impl Parse for BorderImageSideWidth {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if input.r#try(|i| i.expect_ident_matching("auto")).is_ok() {
+        if input.try(|i| i.expect_ident_matching("auto")).is_ok() {
             return Ok(GenericBorderImageSideWidth::Auto);
         }
 
-        if let Ok(len) = input.r#try(|i| LengthOrPercentage::parse_non_negative(context, i)) {
+        if let Ok(len) = input.try(|i| LengthOrPercentage::parse_non_negative(context, i)) {
             return Ok(GenericBorderImageSideWidth::Length(len));
         }
 
@@ -133,10 +133,10 @@ impl Parse for BorderImageSlice {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        let mut fill = input.r#try(|i| i.expect_ident_matching("fill")).is_ok();
+        let mut fill = input.try(|i| i.expect_ident_matching("fill")).is_ok();
         let offsets = Rect::parse_with(context, input, NumberOrPercentage::parse_non_negative)?;
         if !fill {
-            fill = input.r#try(|i| i.expect_ident_matching("fill")).is_ok();
+            fill = input.try(|i| i.expect_ident_matching("fill")).is_ok();
         }
         Ok(GenericBorderImageSlice {
             offsets: offsets,
@@ -151,7 +151,7 @@ impl Parse for BorderRadius {
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
         let widths = Rect::parse_with(context, input, LengthOrPercentage::parse_non_negative)?;
-        let heights = if input.r#try(|i| i.expect_delim('/')).is_ok() {
+        let heights = if input.try(|i| i.expect_delim('/')).is_ok() {
             Rect::parse_with(context, input, LengthOrPercentage::parse_non_negative)?
         } else {
             widths.clone()
@@ -236,7 +236,7 @@ impl Parse for BorderImageRepeat {
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
         let horizontal = BorderImageRepeatKeyword::parse(input)?;
-        let vertical = input.r#try(BorderImageRepeatKeyword::parse).ok();
+        let vertical = input.try(BorderImageRepeatKeyword::parse).ok();
         Ok(BorderImageRepeat(
             horizontal,
             vertical.unwrap_or(horizontal),
diff --git a/components/style/values/specified/box.rs b/components/style/values/specified/box.rs
index da7b5d98eee..d39aa547476 100644
--- a/components/style/values/specified/box.rs
+++ b/components/style/values/specified/box.rs
@@ -310,7 +310,7 @@ impl Parse for VerticalAlign {
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
         if let Ok(lop) =
-            input.r#try(|i| LengthOrPercentage::parse_quirky(context, i, AllowQuirks::Yes))
+            input.try(|i| LengthOrPercentage::parse_quirky(context, i, AllowQuirks::Yes))
         {
             return Ok(GenericVerticalAlign::Length(lop));
         }
@@ -341,7 +341,7 @@ impl Parse for AnimationIterationCount {
         input: &mut ::cssparser::Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
         if input
-            .r#try(|input| input.expect_ident_matching("infinite"))
+            .try(|input| input.expect_ident_matching("infinite"))
             .is_ok()
         {
             return Ok(GenericAnimationIterationCount::Infinite);
@@ -394,7 +394,7 @@ impl Parse for AnimationName {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(name) = input.r#try(|input| KeyframesName::parse(context, input)) {
+        if let Ok(name) = input.try(|input| KeyframesName::parse(context, input)) {
             return Ok(AnimationName(Some(name)));
         }
 
@@ -557,7 +557,7 @@ impl Parse for WillChange {
         input: &mut Parser<'i, 't>,
     ) -> Result<WillChange, ParseError<'i>> {
         if input
-            .r#try(|input| input.expect_ident_matching("auto"))
+            .try(|input| input.expect_ident_matching("auto"))
             .is_ok()
         {
             return Ok(WillChange::Auto);
@@ -646,14 +646,14 @@ impl Parse for TouchAction {
             "none" => Ok(TouchAction::TOUCH_ACTION_NONE),
             "manipulation" => Ok(TouchAction::TOUCH_ACTION_MANIPULATION),
             "pan-x" => {
-                if input.r#try(|i| i.expect_ident_matching("pan-y")).is_ok() {
+                if input.try(|i| i.expect_ident_matching("pan-y")).is_ok() {
                     Ok(TouchAction::TOUCH_ACTION_PAN_X | TouchAction::TOUCH_ACTION_PAN_Y)
                 } else {
                     Ok(TouchAction::TOUCH_ACTION_PAN_X)
                 }
             },
             "pan-y" => {
-                if input.r#try(|i| i.expect_ident_matching("pan-x")).is_ok() {
+                if input.try(|i| i.expect_ident_matching("pan-x")).is_ok() {
                     Ok(TouchAction::TOUCH_ACTION_PAN_X | TouchAction::TOUCH_ACTION_PAN_Y)
                 } else {
                     Ok(TouchAction::TOUCH_ACTION_PAN_Y)
@@ -757,7 +757,7 @@ impl Parse for Contain {
         input: &mut Parser<'i, 't>,
     ) -> Result<Contain, ParseError<'i>> {
         let mut result = Contain::empty();
-        while let Ok(name) = input.r#try(|i| i.expect_ident_cloned()) {
+        while let Ok(name) = input.try(|i| i.expect_ident_cloned()) {
             let flag = match_ignore_ascii_case! { &name,
                 "size" => Some(Contain::SIZE),
                 "layout" => Some(Contain::LAYOUT),
@@ -794,7 +794,7 @@ impl Parse for Perspective {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if input.r#try(|i| i.expect_ident_matching("none")).is_ok() {
+        if input.try(|i| i.expect_ident_matching("none")).is_ok() {
             return Ok(GenericPerspective::None);
         }
         Ok(GenericPerspective::Length(NonNegativeLength::parse(
diff --git a/components/style/values/specified/color.rs b/components/style/values/specified/color.rs
index ab24d1a157c..a0f3c3bbde4 100644
--- a/components/style/values/specified/color.rs
+++ b/components/style/values/specified/color.rs
@@ -142,7 +142,7 @@ impl Parse for Color {
         input.reset(&start);
 
         let compontent_parser = ColorComponentParser(&*context);
-        match input.r#try(|i| CSSParserColor::parse_with(&compontent_parser, i)) {
+        match input.try(|i| CSSParserColor::parse_with(&compontent_parser, i)) {
             Ok(value) => Ok(match value {
                 CSSParserColor::CurrentColor => Color::CurrentColor,
                 CSSParserColor::RGBA(rgba) => Color::Numeric {
@@ -245,7 +245,7 @@ impl Color {
         input: &mut Parser<'i, 't>,
         allow_quirks: AllowQuirks,
     ) -> Result<Self, ParseError<'i>> {
-        input.r#try(|i| Self::parse(context, i)).or_else(|e| {
+        input.try(|i| Self::parse(context, i)).or_else(|e| {
             if !allow_quirks.allowed(context.quirks_mode) {
                 return Err(e);
             }
diff --git a/components/style/values/specified/column.rs b/components/style/values/specified/column.rs
index 2b6a919b232..0a77dd24687 100644
--- a/components/style/values/specified/column.rs
+++ b/components/style/values/specified/column.rs
@@ -18,7 +18,7 @@ impl Parse for ColumnCount {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if input.r#try(|i| i.expect_ident_matching("auto")).is_ok() {
+        if input.try(|i| i.expect_ident_matching("auto")).is_ok() {
             return Ok(GenericColumnCount::Auto);
         }
         Ok(GenericColumnCount::Integer(PositiveInteger::parse(
diff --git a/components/style/values/specified/counters.rs b/components/style/values/specified/counters.rs
index 718dd07a5fb..fb2b64dbc86 100644
--- a/components/style/values/specified/counters.rs
+++ b/components/style/values/specified/counters.rs
@@ -52,7 +52,7 @@ fn parse_counters<'i, 't>(
     default_value: i32,
 ) -> Result<Vec<CounterPair<Integer>>, ParseError<'i>> {
     if input
-        .r#try(|input| input.expect_ident_matching("none"))
+        .try(|input| input.expect_ident_matching("none"))
         .is_ok()
     {
         return Ok(vec![]);
@@ -68,7 +68,7 @@ fn parse_counters<'i, 't>(
         };
 
         let value = input
-            .r#try(|input| Integer::parse(context, input))
+            .try(|input| Integer::parse(context, input))
             .unwrap_or(Integer::new(default_value));
         counters.push(CounterPair { name, value });
     }
@@ -90,7 +90,7 @@ impl Content {
     #[cfg(feature = "servo")]
     fn parse_counter_style(_: &ParserContext, input: &mut Parser) -> ListStyleType {
         input
-            .r#try(|input| {
+            .try(|input| {
                 input.expect_comma()?;
                 ListStyleType::parse(input)
             })
@@ -100,7 +100,7 @@ impl Content {
     #[cfg(feature = "gecko")]
     fn parse_counter_style(context: &ParserContext, input: &mut Parser) -> CounterStyleOrNone {
         input
-            .r#try(|input| {
+            .try(|input| {
                 input.expect_comma()?;
                 CounterStyleOrNone::parse(context, input)
             })
@@ -117,13 +117,13 @@ impl Parse for Content {
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
         if input
-            .r#try(|input| input.expect_ident_matching("normal"))
+            .try(|input| input.expect_ident_matching("normal"))
             .is_ok()
         {
             return Ok(generics::Content::Normal);
         }
         if input
-            .r#try(|input| input.expect_ident_matching("none"))
+            .try(|input| input.expect_ident_matching("none"))
             .is_ok()
         {
             return Ok(generics::Content::None);
@@ -131,7 +131,7 @@ impl Parse for Content {
         #[cfg(feature = "gecko")]
         {
             if input
-                .r#try(|input| input.expect_ident_matching("-moz-alt-content"))
+                .try(|input| input.expect_ident_matching("-moz-alt-content"))
                 .is_ok()
             {
                 return Ok(generics::Content::MozAltContent);
@@ -142,7 +142,7 @@ impl Parse for Content {
         loop {
             #[cfg(feature = "gecko")]
             {
-                if let Ok(url) = input.r#try(|i| SpecifiedImageUrl::parse(context, i)) {
+                if let Ok(url) = input.try(|i| SpecifiedImageUrl::parse(context, i)) {
                     content.push(generics::ContentItem::Url(url));
                     continue;
                 }
diff --git a/components/style/values/specified/easing.rs b/components/style/values/specified/easing.rs
index d65f1897d4c..f7cd72a3747 100644
--- a/components/style/values/specified/easing.rs
+++ b/components/style/values/specified/easing.rs
@@ -21,10 +21,10 @@ impl Parse for TimingFunction {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(keyword) = input.r#try(TimingKeyword::parse) {
+        if let Ok(keyword) = input.try(TimingKeyword::parse) {
             return Ok(GenericTimingFunction::Keyword(keyword));
         }
-        if let Ok(ident) = input.r#try(|i| i.expect_ident_cloned()) {
+        if let Ok(ident) = input.try(|i| i.expect_ident_cloned()) {
             let position = match_ignore_ascii_case! { &ident,
                 "step-start" => StepPosition::Start,
                 "step-end" => StepPosition::End,
@@ -57,7 +57,7 @@ impl Parse for TimingFunction {
                 },
                 "steps" => {
                     let steps = Integer::parse_positive(context, i)?;
-                    let position = i.r#try(|i| {
+                    let position = i.try(|i| {
                         i.expect_comma()?;
                         StepPosition::parse(context, i)
                     }).unwrap_or(StepPosition::End);
diff --git a/components/style/values/specified/effects.rs b/components/style/values/specified/effects.rs
index 758827ae5ec..6a6612e7a94 100644
--- a/components/style/values/specified/effects.rs
+++ b/components/style/values/specified/effects.rs
@@ -109,7 +109,7 @@ impl Parse for BoxShadow {
         loop {
             if !inset {
                 if input
-                    .r#try(|input| input.expect_ident_matching("inset"))
+                    .try(|input| input.expect_ident_matching("inset"))
                     .is_ok()
                 {
                     inset = true;
@@ -117,14 +117,14 @@ impl Parse for BoxShadow {
                 }
             }
             if lengths.is_none() {
-                let value = input.r#try::<_, _, ParseError>(|i| {
+                let value = input.try::<_, _, ParseError>(|i| {
                     let horizontal = Length::parse(context, i)?;
                     let vertical = Length::parse(context, i)?;
                     let (blur, spread) = match i
-                        .r#try::<_, _, ParseError>(|i| Length::parse_non_negative(context, i))
+                        .try::<_, _, ParseError>(|i| Length::parse_non_negative(context, i))
                     {
                         Ok(blur) => {
-                            let spread = i.r#try(|i| Length::parse(context, i)).ok();
+                            let spread = i.try(|i| Length::parse(context, i)).ok();
                             (Some(blur.into()), spread)
                         },
                         Err(_) => (None, None),
@@ -137,7 +137,7 @@ impl Parse for BoxShadow {
                 }
             }
             if color.is_none() {
-                if let Ok(value) = input.r#try(|i| Color::parse(context, i)) {
+                if let Ok(value) = input.try(|i| Color::parse(context, i)) {
                     color = Some(value);
                     continue;
                 }
@@ -194,7 +194,7 @@ impl Parse for Filter {
     ) -> Result<Self, ParseError<'i>> {
         #[cfg(feature = "gecko")]
         {
-            if let Ok(url) = input.r#try(|i| SpecifiedUrl::parse(context, i)) {
+            if let Ok(url) = input.try(|i| SpecifiedUrl::parse(context, i)) {
                 return Ok(GenericFilter::Url(url));
             }
         }
@@ -253,12 +253,12 @@ impl Parse for SimpleShadow {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        let color = input.r#try(|i| Color::parse(context, i)).ok();
+        let color = input.try(|i| Color::parse(context, i)).ok();
         let horizontal = Length::parse(context, input)?;
         let vertical = Length::parse(context, input)?;
-        let blur = input.r#try(|i| Length::parse_non_negative(context, i)).ok();
+        let blur = input.try(|i| Length::parse_non_negative(context, i)).ok();
         let blur = blur.map(NonNegative::<Length>);
-        let color = color.or_else(|| input.r#try(|i| Color::parse(context, i)).ok());
+        let color = color.or_else(|| input.try(|i| Color::parse(context, i)).ok());
 
         Ok(SimpleShadow {
             color,
diff --git a/components/style/values/specified/flex.rs b/components/style/values/specified/flex.rs
index 8efe96ed556..01fbbb7f304 100644
--- a/components/style/values/specified/flex.rs
+++ b/components/style/values/specified/flex.rs
@@ -25,7 +25,7 @@ impl Parse for FlexBasis {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(width) = input.r#try(|i| Width::parse(context, i)) {
+        if let Ok(width) = input.try(|i| Width::parse(context, i)) {
             return Ok(GenericFlexBasis::Width(width));
         }
         try_match_ident_ignore_ascii_case! { input,
diff --git a/components/style/values/specified/font.rs b/components/style/values/specified/font.rs
index eabb878f311..2c0651bac4b 100644
--- a/components/style/values/specified/font.rs
+++ b/components/style/values/specified/font.rs
@@ -117,7 +117,7 @@ impl Parse for FontWeight {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<FontWeight, ParseError<'i>> {
-        if let Ok(absolute) = input.r#try(|input| AbsoluteFontWeight::parse(context, input)) {
+        if let Ok(absolute) = input.try(|input| AbsoluteFontWeight::parse(context, input)) {
             return Ok(FontWeight::Absolute(absolute));
         }
 
@@ -190,7 +190,7 @@ impl Parse for AbsoluteFontWeight {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(number) = input.r#try(|input| Number::parse(context, input)) {
+        if let Ok(number) = input.try(|input| Number::parse(context, input)) {
             // We could add another AllowedNumericType value, but it doesn't
             // seem worth it just for a single property with such a weird range,
             // so we do the clamping here manually.
@@ -242,7 +242,7 @@ impl Parse for SpecifiedFontStyle {
             "normal" => generics::FontStyle::Normal,
             "italic" => generics::FontStyle::Italic,
             "oblique" => {
-                let angle = input.r#try(|input| Self::parse_angle(context, input))
+                let angle = input.try(|input| Self::parse_angle(context, input))
                     .unwrap_or_else(|_| Self::default_angle());
 
                 generics::FontStyle::Oblique(angle)
@@ -481,8 +481,7 @@ impl Parse for FontStretch {
         //
         //    Values less than 0% are not allowed and are treated as parse
         //    errors.
-        if let Ok(percentage) = input.r#try(|input| Percentage::parse_non_negative(context, input))
-        {
+        if let Ok(percentage) = input.try(|input| Percentage::parse_non_negative(context, input)) {
             return Ok(FontStretch::Stretch(percentage));
         }
 
@@ -682,7 +681,7 @@ impl Parse for FontSizeAdjust {
         input: &mut Parser<'i, 't>,
     ) -> Result<FontSizeAdjust, ParseError<'i>> {
         if input
-            .r#try(|input| input.expect_ident_matching("none"))
+            .try(|input| input.expect_ident_matching("none"))
             .is_ok()
         {
             return Ok(FontSizeAdjust::None);
@@ -990,12 +989,12 @@ impl FontSize {
         allow_quirks: AllowQuirks,
     ) -> Result<FontSize, ParseError<'i>> {
         if let Ok(lop) =
-            input.r#try(|i| LengthOrPercentage::parse_non_negative_quirky(context, i, allow_quirks))
+            input.try(|i| LengthOrPercentage::parse_non_negative_quirky(context, i, allow_quirks))
         {
             return Ok(FontSize::Length(lop));
         }
 
-        if let Ok(kw) = input.r#try(KeywordSize::parse) {
+        if let Ok(kw) = input.try(KeywordSize::parse) {
             return Ok(FontSize::Keyword(kw.into()));
         }
 
@@ -1177,7 +1176,7 @@ impl Parse for FontVariantAlternates {
     ) -> Result<FontVariantAlternates, ParseError<'i>> {
         let mut alternates = Vec::new();
         if input
-            .r#try(|input| input.expect_ident_matching("normal"))
+            .try(|input| input.expect_ident_matching("normal"))
             .is_ok()
         {
             return Ok(FontVariantAlternates::Value(VariantAlternatesList(
@@ -1194,7 +1193,7 @@ impl Parse for FontVariantAlternates {
                 parsed_alternates |= $flag;
             )
         );
-        while let Ok(_) = input.r#try(|input| {
+        while let Ok(_) = input.try(|input| {
             // FIXME: remove clone() when lifetimes are non-lexical
             match input.next()?.clone() {
                 Token::Ident(ref value) if value.eq_ignore_ascii_case("historical-forms") => {
@@ -1409,13 +1408,13 @@ impl Parse for FontVariantEastAsian {
         let mut result = VariantEastAsian::empty();
 
         if input
-            .r#try(|input| input.expect_ident_matching("normal"))
+            .try(|input| input.expect_ident_matching("normal"))
             .is_ok()
         {
             return Ok(FontVariantEastAsian::Value(result));
         }
 
-        while let Ok(flag) = input.r#try(|input| {
+        while let Ok(flag) = input.try(|input| {
             Ok(
                 match_ignore_ascii_case! { &input.expect_ident().map_err(|_| ())?,
                     "jis78" =>
@@ -1633,19 +1632,19 @@ impl Parse for FontVariantLigatures {
         let mut result = VariantLigatures::empty();
 
         if input
-            .r#try(|input| input.expect_ident_matching("normal"))
+            .try(|input| input.expect_ident_matching("normal"))
             .is_ok()
         {
             return Ok(FontVariantLigatures::Value(result));
         }
         if input
-            .r#try(|input| input.expect_ident_matching("none"))
+            .try(|input| input.expect_ident_matching("none"))
             .is_ok()
         {
             return Ok(FontVariantLigatures::Value(VariantLigatures::NONE));
         }
 
-        while let Ok(flag) = input.r#try(|input| {
+        while let Ok(flag) = input.try(|input| {
             Ok(
                 match_ignore_ascii_case! { &input.expect_ident().map_err(|_| ())?,
                     "common-ligatures" =>
@@ -1842,13 +1841,13 @@ impl Parse for FontVariantNumeric {
         let mut result = VariantNumeric::empty();
 
         if input
-            .r#try(|input| input.expect_ident_matching("normal"))
+            .try(|input| input.expect_ident_matching("normal"))
             .is_ok()
         {
             return Ok(FontVariantNumeric::Value(result));
         }
 
-        while let Ok(flag) = input.r#try(|input| {
+        while let Ok(flag) = input.try(|input| {
             Ok(
                 match_ignore_ascii_case! { &input.expect_ident().map_err(|_| ())?,
                     "ordinal" =>
@@ -1982,14 +1981,14 @@ impl Parse for FontSynthesis {
             "none" => Ok(result),
             "weight" => {
                 result.weight = true;
-                if input.r#try(|input| input.expect_ident_matching("style")).is_ok() {
+                if input.try(|input| input.expect_ident_matching("style")).is_ok() {
                     result.style = true;
                 }
                 Ok(result)
             },
             "style" => {
                 result.style = true;
-                if input.r#try(|input| input.expect_ident_matching("weight")).is_ok() {
+                if input.try(|input| input.expect_ident_matching("weight")).is_ok() {
                     result.weight = true;
                 }
                 Ok(result)
@@ -2128,7 +2127,7 @@ impl Parse for FontLanguageOverride {
         input: &mut Parser<'i, 't>,
     ) -> Result<FontLanguageOverride, ParseError<'i>> {
         if input
-            .r#try(|input| input.expect_ident_matching("normal"))
+            .try(|input| input.expect_ident_matching("normal"))
             .is_ok()
         {
             return Ok(FontLanguageOverride::Normal);
@@ -2195,7 +2194,7 @@ fn parse_one_feature_value<'i, 't>(
     context: &ParserContext,
     input: &mut Parser<'i, 't>,
 ) -> Result<Integer, ParseError<'i>> {
-    if let Ok(integer) = input.r#try(|i| Integer::parse_non_negative(context, i)) {
+    if let Ok(integer) = input.try(|i| Integer::parse_non_negative(context, i)) {
         return Ok(integer);
     }
 
@@ -2213,7 +2212,7 @@ impl Parse for FeatureTagValue<Integer> {
     ) -> Result<Self, ParseError<'i>> {
         let tag = FontTag::parse(context, input)?;
         let value = input
-            .r#try(|i| parse_one_feature_value(context, i))
+            .try(|i| parse_one_feature_value(context, i))
             .unwrap_or_else(|_| Integer::new(1));
 
         Ok(Self { tag, value })
@@ -2331,7 +2330,7 @@ impl Parse for MozScriptLevel {
         input: &mut Parser<'i, 't>,
     ) -> Result<MozScriptLevel, ParseError<'i>> {
         // We don't bother to handle calc here.
-        if let Ok(i) = input.r#try(|i| i.expect_integer()) {
+        if let Ok(i) = input.try(|i| i.expect_integer()) {
             return Ok(MozScriptLevel::Relative(i));
         }
         input.expect_ident_matching("auto")?;
diff --git a/components/style/values/specified/gecko.rs b/components/style/values/specified/gecko.rs
index 5c1e502604d..1d8118fce1b 100644
--- a/components/style/values/specified/gecko.rs
+++ b/components/style/values/specified/gecko.rs
@@ -25,7 +25,7 @@ impl Parse for ScrollSnapPoint {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if input.r#try(|i| i.expect_ident_matching("none")).is_ok() {
+        if input.try(|i| i.expect_ident_matching("none")).is_ok() {
             return Ok(GenericScrollSnapPoint::None);
         }
         input.expect_function_matching("repeat")?;
diff --git a/components/style/values/specified/grid.rs b/components/style/values/specified/grid.rs
index c26dd04908e..663971b8a43 100644
--- a/components/style/values/specified/grid.rs
+++ b/components/style/values/specified/grid.rs
@@ -36,11 +36,11 @@ impl Parse for TrackBreadth<LengthOrPercentage> {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(lop) = input.r#try(|i| LengthOrPercentage::parse_non_negative(context, i)) {
+        if let Ok(lop) = input.try(|i| LengthOrPercentage::parse_non_negative(context, i)) {
             return Ok(TrackBreadth::Breadth(lop));
         }
 
-        if let Ok(f) = input.r#try(parse_flex) {
+        if let Ok(f) = input.try(parse_flex) {
             return Ok(TrackBreadth::Fr(f));
         }
 
@@ -53,17 +53,14 @@ impl Parse for TrackSize<LengthOrPercentage> {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(b) = input.r#try(|i| TrackBreadth::parse(context, i)) {
+        if let Ok(b) = input.try(|i| TrackBreadth::parse(context, i)) {
             return Ok(TrackSize::Breadth(b));
         }
 
-        if input
-            .r#try(|i| i.expect_function_matching("minmax"))
-            .is_ok()
-        {
+        if input.try(|i| i.expect_function_matching("minmax")).is_ok() {
             return input.parse_nested_block(|input| {
                 let inflexible_breadth =
-                    match input.r#try(|i| LengthOrPercentage::parse_non_negative(context, i)) {
+                    match input.try(|i| LengthOrPercentage::parse_non_negative(context, i)) {
                         Ok(lop) => TrackBreadth::Breadth(lop),
                         Err(..) => {
                             let keyword = TrackKeyword::parse(input)?;
@@ -95,7 +92,7 @@ pub fn parse_line_names<'i, 't>(
     input.expect_square_bracket_block()?;
     input.parse_nested_block(|input| {
         let mut values = vec![];
-        while let Ok((loc, ident)) = input.r#try(|i| -> Result<_, CssParseError<()>> {
+        while let Ok((loc, ident)) = input.try(|i| -> Result<_, CssParseError<()>> {
             Ok((i.current_source_location(), i.expect_ident_cloned()?))
         }) {
             let ident = CustomIdent::from_ident(loc, &ident, &["span", "auto"])?;
@@ -126,7 +123,7 @@ impl TrackRepeat<LengthOrPercentage, Integer> {
         input: &mut Parser<'i, 't>,
     ) -> Result<(Self, RepeatType), ParseError<'i>> {
         input
-            .r#try(|i| i.expect_function_matching("repeat").map_err(|e| e.into()))
+            .try(|i| i.expect_function_matching("repeat").map_err(|e| e.into()))
             .and_then(|_| {
                 input.parse_nested_block(|input| {
                     let count = RepeatCount::parse(context, input)?;
@@ -146,9 +143,9 @@ impl TrackRepeat<LengthOrPercentage, Integer> {
 
                     loop {
                         current_names = input
-                            .r#try(parse_line_names)
+                            .try(parse_line_names)
                             .unwrap_or(vec![].into_boxed_slice());
-                        if let Ok(track_size) = input.r#try(|i| TrackSize::parse(context, i)) {
+                        if let Ok(track_size) = input.try(|i| TrackSize::parse(context, i)) {
                             if !track_size.is_fixed() {
                                 if is_auto {
                                     // should be <fixed-size> for <auto-repeat>
@@ -172,7 +169,7 @@ impl TrackRepeat<LengthOrPercentage, Integer> {
                                 // gecko implements new spec.
                                 names.push(
                                     input
-                                        .r#try(parse_line_names)
+                                        .try(parse_line_names)
                                         .unwrap_or(vec![].into_boxed_slice()),
                                 );
                                 break;
@@ -226,10 +223,10 @@ impl Parse for TrackList<LengthOrPercentage, Integer> {
         loop {
             current_names.extend_from_slice(
                 &mut input
-                    .r#try(parse_line_names)
+                    .try(parse_line_names)
                     .unwrap_or(vec![].into_boxed_slice()),
             );
-            if let Ok(track_size) = input.r#try(|i| TrackSize::parse(context, i)) {
+            if let Ok(track_size) = input.try(|i| TrackSize::parse(context, i)) {
                 if !track_size.is_fixed() {
                     atleast_one_not_fixed = true;
                     if auto_repeat.is_some() {
@@ -242,7 +239,7 @@ impl Parse for TrackList<LengthOrPercentage, Integer> {
                 names.push(vec.into_boxed_slice());
                 values.push(TrackListValue::TrackSize(track_size));
             } else if let Ok((repeat, type_)) =
-                input.r#try(|i| TrackRepeat::parse_with_repeat_type(context, i))
+                input.try(|i| TrackRepeat::parse_with_repeat_type(context, i))
             {
                 if list_type == TrackListType::Explicit {
                     list_type = TrackListType::Normal; // <explicit-track-list> doesn't contain repeat()
@@ -404,7 +401,7 @@ impl Parse for GridTemplateComponent<LengthOrPercentage, Integer> {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if input.r#try(|i| i.expect_ident_matching("none")).is_ok() {
+        if input.try(|i| i.expect_ident_matching("none")).is_ok() {
             return Ok(GridTemplateComponent::None);
         }
 
@@ -419,7 +416,7 @@ impl GridTemplateComponent<LengthOrPercentage, Integer> {
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
         if allow_grid_template_subgrids() {
-            if let Ok(t) = input.r#try(|i| LineNameList::parse(context, i)) {
+            if let Ok(t) = input.try(|i| LineNameList::parse(context, i)) {
                 return Ok(GridTemplateComponent::Subgrid(t));
             }
         }
diff --git a/components/style/values/specified/image.rs b/components/style/values/specified/image.rs
index fdf7630a9b2..6366facf049 100644
--- a/components/style/values/specified/image.rs
+++ b/components/style/values/specified/image.rs
@@ -39,7 +39,7 @@ impl ImageLayer {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(v) = input.r#try(|i| None_::parse(context, i)) {
+        if let Ok(v) = input.try(|i| None_::parse(context, i)) {
             return Ok(Either::First(v));
         }
         Image::parse_with_cors_anonymous(context, input).map(Either::Second)
@@ -142,19 +142,19 @@ impl Parse for Image {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Image, ParseError<'i>> {
-        if let Ok(url) = input.r#try(|input| SpecifiedImageUrl::parse(context, input)) {
+        if let Ok(url) = input.try(|input| SpecifiedImageUrl::parse(context, input)) {
             return Ok(generic::Image::Url(url));
         }
-        if let Ok(gradient) = input.r#try(|i| Gradient::parse(context, i)) {
+        if let Ok(gradient) = input.try(|i| Gradient::parse(context, i)) {
             return Ok(generic::Image::Gradient(Box::new(gradient)));
         }
         #[cfg(feature = "servo")]
         {
-            if let Ok(paint_worklet) = input.r#try(|i| PaintWorklet::parse(context, i)) {
+            if let Ok(paint_worklet) = input.try(|i| PaintWorklet::parse(context, i)) {
                 return Ok(generic::Image::PaintWorklet(paint_worklet));
             }
         }
-        if let Ok(image_rect) = input.r#try(|input| MozImageRect::parse(context, input)) {
+        if let Ok(image_rect) = input.try(|input| MozImageRect::parse(context, input)) {
             return Ok(generic::Image::Rect(Box::new(image_rect)));
         }
         Ok(generic::Image::Element(Image::parse_element(input)?))
@@ -172,7 +172,7 @@ impl Image {
 
     /// Parses a `-moz-element(# <element-id>)`.
     fn parse_element<'i, 't>(input: &mut Parser<'i, 't>) -> Result<Atom, ParseError<'i>> {
-        input.r#try(|i| i.expect_function_matching("-moz-element"))?;
+        input.try(|i| i.expect_function_matching("-moz-element"))?;
         let location = input.current_source_location();
         input.parse_nested_block(|i| match *i.next()? {
             Token::IDHash(ref id) => Ok(Atom::from(id.as_ref())),
@@ -190,7 +190,7 @@ impl Image {
         input: &mut Parser<'i, 't>,
     ) -> Result<Image, ParseError<'i>> {
         if let Ok(url) =
-            input.r#try(|input| SpecifiedImageUrl::parse_with_cors_anonymous(context, input))
+            input.try(|input| SpecifiedImageUrl::parse_with_cors_anonymous(context, input))
         {
             return Ok(generic::Image::Url(url));
         }
@@ -350,7 +350,7 @@ impl Gradient {
                 context: &ParserContext,
                 input: &mut Parser<'i, 't>,
             ) -> Result<Self, ParseError<'i>> {
-                input.r#try(|i| {
+                input.try(|i| {
                     let x = Component::parse(context, i)?;
                     let y = Component::parse(context, i)?;
 
@@ -413,13 +413,13 @@ impl Gradient {
                 context: &ParserContext,
                 input: &mut Parser<'i, 't>,
             ) -> Result<Self, ParseError<'i>> {
-                if let Ok(side) = input.r#try(|i| S::parse(context, i)) {
+                if let Ok(side) = input.try(|i| S::parse(context, i)) {
                     return Ok(Component::Side(side));
                 }
-                if let Ok(number) = input.r#try(|i| NumberOrPercentage::parse(context, i)) {
+                if let Ok(number) = input.try(|i| NumberOrPercentage::parse(context, i)) {
                     return Ok(Component::Number(number));
                 }
-                input.r#try(|i| i.expect_ident_matching("center"))?;
+                input.try(|i| i.expect_ident_matching("center"))?;
                 Ok(Component::Center)
             }
         }
@@ -477,7 +477,7 @@ impl Gradient {
         };
 
         let mut items = input
-            .r#try(|i| {
+            .try(|i| {
                 i.expect_comma()?;
                 i.parse_comma_separated(|i| {
                     let function = i.expect_function()?.clone();
@@ -572,16 +572,16 @@ impl GradientKind {
         input: &mut Parser<'i, 't>,
         compat_mode: &mut CompatMode,
     ) -> Result<Self, ParseError<'i>> {
-        let direction =
-            if let Ok(d) = input.r#try(|i| LineDirection::parse(context, i, compat_mode)) {
-                input.expect_comma()?;
-                d
-            } else {
-                match *compat_mode {
-                    CompatMode::Modern => LineDirection::Vertical(Y::Bottom),
-                    _ => LineDirection::Vertical(Y::Top),
-                }
-            };
+        let direction = if let Ok(d) = input.try(|i| LineDirection::parse(context, i, compat_mode))
+        {
+            input.expect_comma()?;
+            d
+        } else {
+            match *compat_mode {
+                CompatMode::Modern => LineDirection::Vertical(Y::Bottom),
+                _ => LineDirection::Vertical(Y::Top),
+            }
+        };
         Ok(generic::GradientKind::Linear(direction))
     }
 
@@ -592,16 +592,16 @@ impl GradientKind {
     ) -> Result<Self, ParseError<'i>> {
         let (shape, position, angle, moz_position) = match *compat_mode {
             CompatMode::Modern => {
-                let shape = input.r#try(|i| EndingShape::parse(context, i, *compat_mode));
-                let position = input.r#try(|i| {
+                let shape = input.try(|i| EndingShape::parse(context, i, *compat_mode));
+                let position = input.try(|i| {
                     i.expect_ident_matching("at")?;
                     Position::parse(context, i)
                 });
                 (shape, position.ok(), None, None)
             },
             CompatMode::WebKit => {
-                let position = input.r#try(|i| Position::parse(context, i));
-                let shape = input.r#try(|i| {
+                let position = input.try(|i| Position::parse(context, i));
+                let shape = input.try(|i| {
                     if position.is_ok() {
                         i.expect_comma()?;
                     }
@@ -620,13 +620,13 @@ impl GradientKind {
             //                          cover | contain
             // and <color-stop>     = <color> [ <percentage> | <length> ]?
             CompatMode::Moz => {
-                let mut position = input.r#try(|i| LegacyPosition::parse(context, i));
-                let angle = input.r#try(|i| Angle::parse(context, i)).ok();
+                let mut position = input.try(|i| LegacyPosition::parse(context, i));
+                let angle = input.try(|i| Angle::parse(context, i)).ok();
                 if position.is_err() {
-                    position = input.r#try(|i| LegacyPosition::parse(context, i));
+                    position = input.try(|i| LegacyPosition::parse(context, i));
                 }
 
-                let shape = input.r#try(|i| {
+                let shape = input.try(|i| {
                     if position.is_ok() || angle.is_some() {
                         i.expect_comma()?;
                     }
@@ -768,18 +768,18 @@ impl LineDirection {
         compat_mode: &mut CompatMode,
     ) -> Result<Self, ParseError<'i>> {
         let mut _angle = if *compat_mode == CompatMode::Moz {
-            input.r#try(|i| Angle::parse(context, i)).ok()
+            input.try(|i| Angle::parse(context, i)).ok()
         } else {
             // Gradients allow unitless zero angles as an exception, see:
             // https://github.com/w3c/csswg-drafts/issues/1162
-            if let Ok(angle) = input.r#try(|i| Angle::parse_with_unitless(context, i)) {
+            if let Ok(angle) = input.try(|i| Angle::parse_with_unitless(context, i)) {
                 return Ok(LineDirection::Angle(angle));
             }
             None
         };
 
-        input.r#try(|i| {
-            let to_ident = i.r#try(|i| i.expect_ident_matching("to"));
+        input.try(|i| {
+            let to_ident = i.try(|i| i.expect_ident_matching("to"));
             match *compat_mode {
                 // `to` keyword is mandatory in modern syntax.
                 CompatMode::Modern => to_ident?,
@@ -801,9 +801,9 @@ impl LineDirection {
             {
                 // `-moz-` prefixed linear gradient can be both Angle and Position.
                 if *compat_mode == CompatMode::Moz {
-                    let position = i.r#try(|i| LegacyPosition::parse(context, i)).ok();
+                    let position = i.try(|i| LegacyPosition::parse(context, i)).ok();
                     if _angle.is_none() {
-                        _angle = i.r#try(|i| Angle::parse(context, i)).ok();
+                        _angle = i.try(|i| Angle::parse(context, i)).ok();
                     };
 
                     if _angle.is_none() && position.is_none() {
@@ -813,14 +813,14 @@ impl LineDirection {
                 }
             }
 
-            if let Ok(x) = i.r#try(X::parse) {
-                if let Ok(y) = i.r#try(Y::parse) {
+            if let Ok(x) = i.try(X::parse) {
+                if let Ok(y) = i.try(Y::parse) {
                     return Ok(LineDirection::Corner(x, y));
                 }
                 return Ok(LineDirection::Horizontal(x));
             }
             let y = Y::parse(i)?;
-            if let Ok(x) = i.r#try(X::parse) {
+            if let Ok(x) = i.try(X::parse) {
                 return Ok(LineDirection::Corner(x, y));
             }
             Ok(LineDirection::Vertical(y))
@@ -850,20 +850,19 @@ impl EndingShape {
         input: &mut Parser<'i, 't>,
         compat_mode: CompatMode,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(extent) = input.r#try(|i| ShapeExtent::parse_with_compat_mode(i, compat_mode)) {
-            if input.r#try(|i| i.expect_ident_matching("circle")).is_ok() {
+        if let Ok(extent) = input.try(|i| ShapeExtent::parse_with_compat_mode(i, compat_mode)) {
+            if input.try(|i| i.expect_ident_matching("circle")).is_ok() {
                 return Ok(generic::EndingShape::Circle(Circle::Extent(extent)));
             }
-            let _ = input.r#try(|i| i.expect_ident_matching("ellipse"));
+            let _ = input.try(|i| i.expect_ident_matching("ellipse"));
             return Ok(generic::EndingShape::Ellipse(Ellipse::Extent(extent)));
         }
-        if input.r#try(|i| i.expect_ident_matching("circle")).is_ok() {
-            if let Ok(extent) = input.r#try(|i| ShapeExtent::parse_with_compat_mode(i, compat_mode))
-            {
+        if input.try(|i| i.expect_ident_matching("circle")).is_ok() {
+            if let Ok(extent) = input.try(|i| ShapeExtent::parse_with_compat_mode(i, compat_mode)) {
                 return Ok(generic::EndingShape::Circle(Circle::Extent(extent)));
             }
             if compat_mode == CompatMode::Modern {
-                if let Ok(length) = input.r#try(|i| Length::parse(context, i)) {
+                if let Ok(length) = input.try(|i| Length::parse(context, i)) {
                     return Ok(generic::EndingShape::Circle(Circle::Radius(length)));
                 }
             }
@@ -871,13 +870,12 @@ impl EndingShape {
                 ShapeExtent::FarthestCorner,
             )));
         }
-        if input.r#try(|i| i.expect_ident_matching("ellipse")).is_ok() {
-            if let Ok(extent) = input.r#try(|i| ShapeExtent::parse_with_compat_mode(i, compat_mode))
-            {
+        if input.try(|i| i.expect_ident_matching("ellipse")).is_ok() {
+            if let Ok(extent) = input.try(|i| ShapeExtent::parse_with_compat_mode(i, compat_mode)) {
                 return Ok(generic::EndingShape::Ellipse(Ellipse::Extent(extent)));
             }
             if compat_mode == CompatMode::Modern {
-                let pair: Result<_, ParseError> = input.r#try(|i| {
+                let pair: Result<_, ParseError> = input.try(|i| {
                     let x = LengthOrPercentage::parse(context, i)?;
                     let y = LengthOrPercentage::parse(context, i)?;
                     Ok((x, y))
@@ -893,10 +891,10 @@ impl EndingShape {
         // -moz- prefixed radial gradient doesn't allow EndingShape's Length or LengthOrPercentage
         // to come before shape keyword. Otherwise it conflicts with <position>.
         if compat_mode != CompatMode::Moz {
-            if let Ok(length) = input.r#try(|i| Length::parse(context, i)) {
-                if let Ok(y) = input.r#try(|i| LengthOrPercentage::parse(context, i)) {
+            if let Ok(length) = input.try(|i| Length::parse(context, i)) {
+                if let Ok(y) = input.try(|i| LengthOrPercentage::parse(context, i)) {
                     if compat_mode == CompatMode::Modern {
-                        let _ = input.r#try(|i| i.expect_ident_matching("ellipse"));
+                        let _ = input.try(|i| i.expect_ident_matching("ellipse"));
                     }
                     return Ok(generic::EndingShape::Ellipse(Ellipse::Radii(
                         length.into(),
@@ -904,7 +902,7 @@ impl EndingShape {
                     )));
                 }
                 if compat_mode == CompatMode::Modern {
-                    let y = input.r#try(|i| {
+                    let y = input.try(|i| {
                         i.expect_ident_matching("ellipse")?;
                         LengthOrPercentage::parse(context, i)
                     });
@@ -914,17 +912,17 @@ impl EndingShape {
                             y,
                         )));
                     }
-                    let _ = input.r#try(|i| i.expect_ident_matching("circle"));
+                    let _ = input.try(|i| i.expect_ident_matching("circle"));
                 }
 
                 return Ok(generic::EndingShape::Circle(Circle::Radius(length)));
             }
         }
-        input.r#try(|i| {
+        input.try(|i| {
             let x = Percentage::parse(context, i)?;
-            let y = if let Ok(y) = i.r#try(|i| LengthOrPercentage::parse(context, i)) {
+            let y = if let Ok(y) = i.try(|i| LengthOrPercentage::parse(context, i)) {
                 if compat_mode == CompatMode::Modern {
-                    let _ = i.r#try(|i| i.expect_ident_matching("ellipse"));
+                    let _ = i.try(|i| i.expect_ident_matching("ellipse"));
                 }
                 y
             } else {
@@ -965,7 +963,7 @@ impl GradientItem {
         loop {
             input.parse_until_before(Delimiter::Comma, |input| {
                 if seen_stop {
-                    if let Ok(hint) = input.r#try(|i| LengthOrPercentage::parse(context, i)) {
+                    if let Ok(hint) = input.try(|i| LengthOrPercentage::parse(context, i)) {
                         seen_stop = false;
                         items.push(generic::GradientItem::InterpolationHint(hint));
                         return Ok(());
@@ -974,7 +972,7 @@ impl GradientItem {
 
                 let stop = ColorStop::parse(context, input)?;
 
-                if let Ok(multi_position) = input.r#try(|i| LengthOrPercentage::parse(context, i)) {
+                if let Ok(multi_position) = input.try(|i| LengthOrPercentage::parse(context, i)) {
                     let stop_color = stop.color.clone();
                     items.push(generic::GradientItem::ColorStop(stop));
                     items.push(generic::GradientItem::ColorStop(ColorStop {
@@ -1010,7 +1008,7 @@ impl Parse for ColorStop {
     ) -> Result<Self, ParseError<'i>> {
         Ok(ColorStop {
             color: Color::parse(context, input)?,
-            position: input.r#try(|i| LengthOrPercentage::parse(context, i)).ok(),
+            position: input.try(|i| LengthOrPercentage::parse(context, i)).ok(),
         })
     }
 }
@@ -1024,7 +1022,7 @@ impl Parse for PaintWorklet {
         input.parse_nested_block(|input| {
             let name = Atom::from(&**input.expect_ident()?);
             let arguments = input
-                .r#try(|input| {
+                .try(|input| {
                     input.expect_comma()?;
                     input.parse_comma_separated(|input| SpecifiedValue::parse(input))
                 })
@@ -1039,7 +1037,7 @@ impl Parse for MozImageRect {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        input.r#try(|i| i.expect_function_matching("-moz-image-rect"))?;
+        input.try(|i| i.expect_function_matching("-moz-image-rect"))?;
         input.parse_nested_block(|i| {
             let string = i.expect_url_or_string()?;
             let url = SpecifiedImageUrl::parse_from_string(string.as_ref().to_owned(), context);
diff --git a/components/style/values/specified/length.rs b/components/style/values/specified/length.rs
index e3c04d47959..2c8498e15bb 100644
--- a/components/style/values/specified/length.rs
+++ b/components/style/values/specified/length.rs
@@ -1228,7 +1228,7 @@ impl LengthOrNumber {
         // We try to parse as a Number first because, for cases like
         // LengthOrNumber, we want "0" to be parsed as a plain Number rather
         // than a Length (0px); this matches the behaviour of all major browsers
-        if let Ok(v) = input.r#try(|i| Number::parse_non_negative(context, i)) {
+        if let Ok(v) = input.try(|i| Number::parse_non_negative(context, i)) {
             return Ok(Either::Second(v));
         }
 
@@ -1272,7 +1272,7 @@ impl MozLength {
         input: &mut Parser<'i, 't>,
         allow_quirks: AllowQuirks,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(l) = input.r#try(ExtremumLength::parse) {
+        if let Ok(l) = input.try(ExtremumLength::parse) {
             return Ok(GenericMozLength::ExtremumLength(l));
         }
 
@@ -1324,7 +1324,7 @@ impl MaxLength {
         input: &mut Parser<'i, 't>,
         allow_quirks: AllowQuirks,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(l) = input.r#try(ExtremumLength::parse) {
+        if let Ok(l) = input.try(ExtremumLength::parse) {
             return Ok(GenericMaxLength::ExtremumLength(l));
         }
 
diff --git a/components/style/values/specified/list.rs b/components/style/values/specified/list.rs
index a793bf29238..2bdd3c10397 100644
--- a/components/style/values/specified/list.rs
+++ b/components/style/values/specified/list.rs
@@ -63,7 +63,7 @@ impl Parse for ListStyleType {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(style) = input.r#try(|i| CounterStyleOrNone::parse(context, i)) {
+        if let Ok(style) = input.try(|i| CounterStyleOrNone::parse(context, i)) {
             return Ok(ListStyleType::CounterStyle(style));
         }
 
@@ -97,7 +97,7 @@ impl Parse for Quotes {
         input: &mut Parser<'i, 't>,
     ) -> Result<Quotes, ParseError<'i>> {
         if input
-            .r#try(|input| input.expect_ident_matching("none"))
+            .try(|input| input.expect_ident_matching("none"))
             .is_ok()
         {
             return Ok(Quotes(Arc::new(Box::new([]))));
diff --git a/components/style/values/specified/mod.rs b/components/style/values/specified/mod.rs
index d416be80197..3b7a3d0e04e 100644
--- a/components/style/values/specified/mod.rs
+++ b/components/style/values/specified/mod.rs
@@ -359,7 +359,7 @@ impl NumberOrPercentage {
         input: &mut Parser<'i, 't>,
         type_: AllowedNumericType,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(per) = input.r#try(|i| Percentage::parse_with_clamping_mode(context, i, type_)) {
+        if let Ok(per) = input.try(|i| Percentage::parse_with_clamping_mode(context, i, type_)) {
             return Ok(NumberOrPercentage::Percentage(per));
         }
 
@@ -703,7 +703,7 @@ impl ClipRect {
             allow_quirks: AllowQuirks,
         ) -> Result<Option<Length>, ParseError<'i>> {
             if input
-                .r#try(|input| input.expect_ident_matching("auto"))
+                .try(|input| input.expect_ident_matching("auto"))
                 .is_ok()
             {
                 Ok(None)
@@ -720,7 +720,7 @@ impl ClipRect {
             let bottom;
             let left;
 
-            if input.r#try(|input| input.expect_comma()).is_ok() {
+            if input.try(|input| input.expect_comma()).is_ok() {
                 right = parse_argument(context, input, allow_quirks)?;
                 input.expect_comma()?;
                 bottom = parse_argument(context, input, allow_quirks)?;
@@ -751,7 +751,7 @@ impl ClipRectOrAuto {
         input: &mut Parser<'i, 't>,
         allow_quirks: AllowQuirks,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(v) = input.r#try(|i| ClipRect::parse_quirky(context, i, allow_quirks)) {
+        if let Ok(v) = input.try(|i| ClipRect::parse_quirky(context, i, allow_quirks)) {
             Ok(Either::First(v))
         } else {
             Auto::parse(context, input).map(Either::Second)
@@ -816,8 +816,8 @@ impl Attr {
     ) -> Result<Attr, ParseError<'i>> {
         // Syntax is `[namespace? `|`]? ident`
         // no spaces allowed
-        let first = input.r#try(|i| i.expect_ident_cloned()).ok();
-        if let Ok(token) = input.r#try(|i| i.next_including_whitespace().map(|t| t.clone())) {
+        let first = input.try(|i| i.expect_ident_cloned()).ok();
+        if let Ok(token) = input.try(|i| i.next_including_whitespace().map(|t| t.clone())) {
             match token {
                 Token::Delim('|') => {
                     let location = input.current_source_location();
diff --git a/components/style/values/specified/motion.rs b/components/style/values/specified/motion.rs
index 632b29a45b9..80fb8630f22 100644
--- a/components/style/values/specified/motion.rs
+++ b/components/style/values/specified/motion.rs
@@ -50,7 +50,7 @@ impl Parse for OffsetPath {
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
         // Parse none.
-        if input.r#try(|i| i.expect_ident_matching("none")).is_ok() {
+        if input.try(|i| i.expect_ident_matching("none")).is_ok() {
             return Ok(OffsetPath::none());
         }
 
diff --git a/components/style/values/specified/outline.rs b/components/style/values/specified/outline.rs
index 46f1acd0b89..890f9dc3020 100644
--- a/components/style/values/specified/outline.rs
+++ b/components/style/values/specified/outline.rs
@@ -53,7 +53,7 @@ impl Parse for OutlineStyle {
         _context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<OutlineStyle, ParseError<'i>> {
-        if let Ok(border_style) = input.r#try(BorderStyle::parse) {
+        if let Ok(border_style) = input.try(BorderStyle::parse) {
             if let BorderStyle::Hidden = border_style {
                 return Err(input
                     .new_custom_error(SelectorParseErrorKind::UnexpectedIdent("hidden".into())));
diff --git a/components/style/values/specified/position.rs b/components/style/values/specified/position.rs
index fa14825caed..62895e1ac9f 100644
--- a/components/style/values/specified/position.rs
+++ b/components/style/values/specified/position.rs
@@ -102,28 +102,28 @@ impl Position {
         input: &mut Parser<'i, 't>,
         allow_quirks: AllowQuirks,
     ) -> Result<Self, ParseError<'i>> {
-        match input.r#try(|i| PositionComponent::parse_quirky(context, i, allow_quirks)) {
+        match input.try(|i| PositionComponent::parse_quirky(context, i, allow_quirks)) {
             Ok(x_pos @ PositionComponent::Center) => {
                 if let Ok(y_pos) =
-                    input.r#try(|i| PositionComponent::parse_quirky(context, i, allow_quirks))
+                    input.try(|i| PositionComponent::parse_quirky(context, i, allow_quirks))
                 {
                     return Ok(Self::new(x_pos, y_pos));
                 }
                 let x_pos = input
-                    .r#try(|i| PositionComponent::parse_quirky(context, i, allow_quirks))
+                    .try(|i| PositionComponent::parse_quirky(context, i, allow_quirks))
                     .unwrap_or(x_pos);
                 let y_pos = PositionComponent::Center;
                 return Ok(Self::new(x_pos, y_pos));
             },
             Ok(PositionComponent::Side(x_keyword, lop)) => {
-                if input.r#try(|i| i.expect_ident_matching("center")).is_ok() {
+                if input.try(|i| i.expect_ident_matching("center")).is_ok() {
                     let x_pos = PositionComponent::Side(x_keyword, lop);
                     let y_pos = PositionComponent::Center;
                     return Ok(Self::new(x_pos, y_pos));
                 }
-                if let Ok(y_keyword) = input.r#try(Y::parse) {
+                if let Ok(y_keyword) = input.try(Y::parse) {
                     let y_lop = input
-                        .r#try(|i| LengthOrPercentage::parse_quirky(context, i, allow_quirks))
+                        .try(|i| LengthOrPercentage::parse_quirky(context, i, allow_quirks))
                         .ok();
                     let x_pos = PositionComponent::Side(x_keyword, lop);
                     let y_pos = PositionComponent::Side(y_keyword, y_lop);
@@ -134,30 +134,30 @@ impl Position {
                 return Ok(Self::new(x_pos, y_pos));
             },
             Ok(x_pos @ PositionComponent::Length(_)) => {
-                if let Ok(y_keyword) = input.r#try(Y::parse) {
+                if let Ok(y_keyword) = input.try(Y::parse) {
                     let y_pos = PositionComponent::Side(y_keyword, None);
                     return Ok(Self::new(x_pos, y_pos));
                 }
                 if let Ok(y_lop) =
-                    input.r#try(|i| LengthOrPercentage::parse_quirky(context, i, allow_quirks))
+                    input.try(|i| LengthOrPercentage::parse_quirky(context, i, allow_quirks))
                 {
                     let y_pos = PositionComponent::Length(y_lop);
                     return Ok(Self::new(x_pos, y_pos));
                 }
                 let y_pos = PositionComponent::Center;
-                let _ = input.r#try(|i| i.expect_ident_matching("center"));
+                let _ = input.try(|i| i.expect_ident_matching("center"));
                 return Ok(Self::new(x_pos, y_pos));
             },
             Err(_) => {},
         }
         let y_keyword = Y::parse(input)?;
-        let lop_and_x_pos: Result<_, ParseError> = input.r#try(|i| {
+        let lop_and_x_pos: Result<_, ParseError> = input.try(|i| {
             let y_lop = i
-                .r#try(|i| LengthOrPercentage::parse_quirky(context, i, allow_quirks))
+                .try(|i| LengthOrPercentage::parse_quirky(context, i, allow_quirks))
                 .ok();
-            if let Ok(x_keyword) = i.r#try(X::parse) {
+            if let Ok(x_keyword) = i.try(X::parse) {
                 let x_lop = i
-                    .r#try(|i| LengthOrPercentage::parse_quirky(context, i, allow_quirks))
+                    .try(|i| LengthOrPercentage::parse_quirky(context, i, allow_quirks))
                     .ok();
                 let x_pos = PositionComponent::Side(x_keyword, x_lop);
                 return Ok((y_lop, x_pos));
@@ -230,16 +230,15 @@ impl<S: Parse> PositionComponent<S> {
         input: &mut Parser<'i, 't>,
         allow_quirks: AllowQuirks,
     ) -> Result<Self, ParseError<'i>> {
-        if input.r#try(|i| i.expect_ident_matching("center")).is_ok() {
+        if input.try(|i| i.expect_ident_matching("center")).is_ok() {
             return Ok(PositionComponent::Center);
         }
-        if let Ok(lop) = input.r#try(|i| LengthOrPercentage::parse_quirky(context, i, allow_quirks))
-        {
+        if let Ok(lop) = input.try(|i| LengthOrPercentage::parse_quirky(context, i, allow_quirks)) {
             return Ok(PositionComponent::Length(lop));
         }
         let keyword = S::parse(context, input)?;
         let lop = input
-            .r#try(|i| LengthOrPercentage::parse_quirky(context, i, allow_quirks))
+            .try(|i| LengthOrPercentage::parse_quirky(context, i, allow_quirks))
             .ok();
         Ok(PositionComponent::Side(keyword, lop))
     }
@@ -360,51 +359,51 @@ impl LegacyPosition {
         input: &mut Parser<'i, 't>,
         allow_quirks: AllowQuirks,
     ) -> Result<Self, ParseError<'i>> {
-        match input.r#try(|i| OriginComponent::parse(context, i)) {
+        match input.try(|i| OriginComponent::parse(context, i)) {
             Ok(x_pos @ OriginComponent::Center) => {
-                if let Ok(y_pos) = input.r#try(|i| OriginComponent::parse(context, i)) {
+                if let Ok(y_pos) = input.try(|i| OriginComponent::parse(context, i)) {
                     return Ok(Self::new(x_pos, y_pos));
                 }
                 let x_pos = input
-                    .r#try(|i| OriginComponent::parse(context, i))
+                    .try(|i| OriginComponent::parse(context, i))
                     .unwrap_or(x_pos);
                 let y_pos = OriginComponent::Center;
                 return Ok(Self::new(x_pos, y_pos));
             },
             Ok(OriginComponent::Side(x_keyword)) => {
-                if let Ok(y_keyword) = input.r#try(Y::parse) {
+                if let Ok(y_keyword) = input.try(Y::parse) {
                     let x_pos = OriginComponent::Side(x_keyword);
                     let y_pos = OriginComponent::Side(y_keyword);
                     return Ok(Self::new(x_pos, y_pos));
                 }
                 let x_pos = OriginComponent::Side(x_keyword);
                 if let Ok(y_lop) =
-                    input.r#try(|i| LengthOrPercentage::parse_quirky(context, i, allow_quirks))
+                    input.try(|i| LengthOrPercentage::parse_quirky(context, i, allow_quirks))
                 {
                     return Ok(Self::new(x_pos, OriginComponent::Length(y_lop)));
                 }
-                let _ = input.r#try(|i| i.expect_ident_matching("center"));
+                let _ = input.try(|i| i.expect_ident_matching("center"));
                 return Ok(Self::new(x_pos, OriginComponent::Center));
             },
             Ok(x_pos @ OriginComponent::Length(_)) => {
-                if let Ok(y_keyword) = input.r#try(Y::parse) {
+                if let Ok(y_keyword) = input.try(Y::parse) {
                     let y_pos = OriginComponent::Side(y_keyword);
                     return Ok(Self::new(x_pos, y_pos));
                 }
                 if let Ok(y_lop) =
-                    input.r#try(|i| LengthOrPercentage::parse_quirky(context, i, allow_quirks))
+                    input.try(|i| LengthOrPercentage::parse_quirky(context, i, allow_quirks))
                 {
                     let y_pos = OriginComponent::Length(y_lop);
                     return Ok(Self::new(x_pos, y_pos));
                 }
-                let _ = input.r#try(|i| i.expect_ident_matching("center"));
+                let _ = input.try(|i| i.expect_ident_matching("center"));
                 return Ok(Self::new(x_pos, OriginComponent::Center));
             },
             Err(_) => {},
         }
         let y_keyword = Y::parse(input)?;
-        let x_pos: Result<_, ParseError> = input.r#try(|i| {
-            if let Ok(x_keyword) = i.r#try(X::parse) {
+        let x_pos: Result<_, ParseError> = input.try(|i| {
+            if let Ok(x_keyword) = i.try(X::parse) {
                 let x_pos = OriginComponent::Side(x_keyword);
                 return Ok(x_pos);
             }
@@ -649,7 +648,7 @@ impl Parse for TemplateAreas {
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
         let mut strings = vec![];
-        while let Ok(string) = input.r#try(|i| i.expect_string().map(|s| s.as_ref().into())) {
+        while let Ok(string) = input.try(|i| i.expect_string().map(|s| s.as_ref().into())) {
             strings.push(string);
         }
 
@@ -743,7 +742,7 @@ impl Parse for ZIndex {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if input.r#try(|i| i.expect_ident_matching("auto")).is_ok() {
+        if input.try(|i| i.expect_ident_matching("auto")).is_ok() {
             return Ok(GenericZIndex::Auto);
         }
         Ok(GenericZIndex::Integer(Integer::parse(context, input)?))
diff --git a/components/style/values/specified/source_size_list.rs b/components/style/values/specified/source_size_list.rs
index c7a15c3bfb2..9096b53905b 100644
--- a/components/style/values/specified/source_size_list.rs
+++ b/components/style/values/specified/source_size_list.rs
@@ -92,7 +92,7 @@ impl Parse for SourceSizeOrLength {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(size) = input.r#try(|input| SourceSize::parse(context, input)) {
+        if let Ok(size) = input.try(|input| SourceSize::parse(context, input)) {
             return Ok(SourceSizeOrLength::SourceSize(size));
         }
 
diff --git a/components/style/values/specified/svg.rs b/components/style/values/specified/svg.rs
index a09a2236c92..e1f62288c00 100644
--- a/components/style/values/specified/svg.rs
+++ b/components/style/values/specified/svg.rs
@@ -63,7 +63,7 @@ impl Parse for SVGLength {
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
         input
-            .r#try(|i| SvgLengthOrPercentageOrNumber::parse(context, i))
+            .try(|i| SvgLengthOrPercentageOrNumber::parse(context, i))
             .map(Into::into)
             .or_else(|_| parse_context_value(input, generic::SVGLength::ContextValue))
     }
@@ -89,7 +89,7 @@ impl Parse for SVGWidth {
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
         input
-            .r#try(|i| NonNegativeSvgLengthOrPercentageOrNumber::parse(context, i))
+            .try(|i| NonNegativeSvgLengthOrPercentageOrNumber::parse(context, i))
             .map(Into::into)
             .or_else(|_| parse_context_value(input, generic::SVGLength::ContextValue))
     }
@@ -109,13 +109,13 @@ impl Parse for SVGStrokeDashArray {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(values) = input.r#try(|i| {
+        if let Ok(values) = input.try(|i| {
             CommaWithSpace::parse(i, |i| {
                 NonNegativeSvgLengthOrPercentageOrNumber::parse(context, i)
             })
         }) {
             Ok(generic::SVGStrokeDashArray::Values(values))
-        } else if let Ok(_) = input.r#try(|i| i.expect_ident_matching("none")) {
+        } else if let Ok(_) = input.try(|i| i.expect_ident_matching("none")) {
             Ok(generic::SVGStrokeDashArray::Values(vec![]))
         } else {
             parse_context_value(input, generic::SVGStrokeDashArray::ContextValue)
@@ -131,7 +131,7 @@ impl Parse for SVGOpacity {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(opacity) = input.r#try(|i| Opacity::parse(context, i)) {
+        if let Ok(opacity) = input.try(|i| Opacity::parse(context, i)) {
             return Ok(generic::SVGOpacity::Opacity(opacity));
         }
 
@@ -196,7 +196,7 @@ impl Parse for SVGPaintOrder {
         _context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<SVGPaintOrder, ParseError<'i>> {
-        if let Ok(()) = input.r#try(|i| i.expect_ident_matching("normal")) {
+        if let Ok(()) = input.try(|i| i.expect_ident_matching("normal")) {
             return Ok(SVGPaintOrder::normal());
         }
 
@@ -207,7 +207,7 @@ impl Parse for SVGPaintOrder {
         let mut pos = 0;
 
         loop {
-            let result: Result<_, ParseError> = input.r#try(|input| {
+            let result: Result<_, ParseError> = input.try(|input| {
                 try_match_ident_ignore_ascii_case! { input,
                     "fill" => Ok(PaintOrder::Fill),
                     "stroke" => Ok(PaintOrder::Stroke),
diff --git a/components/style/values/specified/text.rs b/components/style/values/specified/text.rs
index 0074d7e0bec..c3f6289972c 100644
--- a/components/style/values/specified/text.rs
+++ b/components/style/values/specified/text.rs
@@ -45,11 +45,11 @@ impl Parse for InitialLetter {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if input.r#try(|i| i.expect_ident_matching("normal")).is_ok() {
+        if input.try(|i| i.expect_ident_matching("normal")).is_ok() {
             return Ok(GenericInitialLetter::Normal);
         }
         let size = Number::parse_at_least_one(context, input)?;
-        let sink = input.r#try(|i| Integer::parse_positive(context, i)).ok();
+        let sink = input.try(|i| Integer::parse_positive(context, i)).ok();
         Ok(GenericInitialLetter::Specified(size, sink))
     }
 }
@@ -81,10 +81,10 @@ impl Parse for LineHeight {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(number) = input.r#try(|i| NonNegativeNumber::parse(context, i)) {
+        if let Ok(number) = input.try(|i| NonNegativeNumber::parse(context, i)) {
             return Ok(GenericLineHeight::Number(number));
         }
-        if let Ok(nlop) = input.r#try(|i| NonNegativeLengthOrPercentage::parse(context, i)) {
+        if let Ok(nlop) = input.try(|i| NonNegativeLengthOrPercentage::parse(context, i)) {
             return Ok(GenericLineHeight::Length(nlop));
         }
         let location = input.current_source_location();
@@ -215,7 +215,7 @@ impl Parse for TextOverflow {
     ) -> Result<TextOverflow, ParseError<'i>> {
         let first = TextOverflowSide::parse(context, input)?;
         let second = input
-            .r#try(|input| TextOverflowSide::parse(context, input))
+            .try(|input| TextOverflowSide::parse(context, input))
             .ok();
         Ok(TextOverflow { first, second })
     }
@@ -295,14 +295,14 @@ macro_rules! impl_text_decoration_line {
             ) -> Result<TextDecorationLine, ParseError<'i>> {
                 let mut result = TextDecorationLine::NONE;
                 if input
-                    .r#try(|input| input.expect_ident_matching("none"))
+                    .try(|input| input.expect_ident_matching("none"))
                     .is_ok()
                 {
                     return Ok(result);
                 }
 
                 loop {
-                    let result = input.r#try(|input| {
+                    let result = input.try(|input| {
                         let ident = input.expect_ident().map_err(|_| ())?;
                         match_ignore_ascii_case! { ident,
                             $(
@@ -444,7 +444,7 @@ impl Parse for TextAlign {
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
         // MozCenterOrInherit cannot be parsed, only set directly on the elements
-        if let Ok(key) = input.r#try(TextAlignKeyword::parse) {
+        if let Ok(key) = input.try(TextAlignKeyword::parse) {
             return Ok(TextAlign::Keyword(key));
         }
         #[cfg(feature = "gecko")]
@@ -678,22 +678,22 @@ impl Parse for TextEmphasisStyle {
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
         if input
-            .r#try(|input| input.expect_ident_matching("none"))
+            .try(|input| input.expect_ident_matching("none"))
             .is_ok()
         {
             return Ok(TextEmphasisStyle::None);
         }
 
-        if let Ok(s) = input.r#try(|i| i.expect_string().map(|s| s.as_ref().to_owned())) {
+        if let Ok(s) = input.try(|i| i.expect_string().map(|s| s.as_ref().to_owned())) {
             // Handle <string>
             return Ok(TextEmphasisStyle::String(s));
         }
 
         // Handle a pair of keywords
-        let mut shape = input.r#try(TextEmphasisShapeKeyword::parse).ok();
-        let fill = input.r#try(TextEmphasisFillMode::parse).ok();
+        let mut shape = input.try(TextEmphasisShapeKeyword::parse).ok();
+        let fill = input.try(TextEmphasisFillMode::parse).ok();
         if shape.is_none() {
-            shape = input.r#try(TextEmphasisShapeKeyword::parse).ok();
+            shape = input.try(TextEmphasisShapeKeyword::parse).ok();
         }
 
         // At least one of shape or fill must be handled
@@ -793,7 +793,7 @@ impl Parse for TextEmphasisPosition {
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
         if let Ok(horizontal) =
-            input.r#try(|input| TextEmphasisHorizontalWritingModeValue::parse(input))
+            input.try(|input| TextEmphasisHorizontalWritingModeValue::parse(input))
         {
             let vertical = TextEmphasisVerticalWritingModeValue::parse(input)?;
             Ok(TextEmphasisPosition(horizontal, vertical))
@@ -845,7 +845,7 @@ impl Parse for MozTabSize {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if let Ok(number) = input.r#try(|i| NonNegativeNumber::parse(context, i)) {
+        if let Ok(number) = input.try(|i| NonNegativeNumber::parse(context, i)) {
             // Numbers need to be parsed first because `0` must be recognised
             // as the number `0` and not the length `0px`.
             return Ok(GenericMozTabSize::Number(number));
diff --git a/components/style/values/specified/transform.rs b/components/style/values/specified/transform.rs
index 2a45e1c6e61..c1ffe202a79 100644
--- a/components/style/values/specified/transform.rs
+++ b/components/style/values/specified/transform.rs
@@ -38,7 +38,7 @@ impl Transform {
         use style_traits::{Separator, Space};
 
         if input
-            .r#try(|input| input.expect_ident_matching("none"))
+            .try(|input| input.expect_ident_matching("none"))
             .is_ok()
         {
             return Ok(generic::Transform(Vec::new()));
@@ -106,7 +106,7 @@ impl Transform {
                     },
                     "translate" => {
                         let sx = specified::LengthOrPercentage::parse(context, input)?;
-                        if input.r#try(|input| input.expect_comma()).is_ok() {
+                        if input.try(|input| input.expect_comma()).is_ok() {
                             let sy = specified::LengthOrPercentage::parse(context, input)?;
                             Ok(generic::TransformOperation::Translate(sx, Some(sy)))
                         } else {
@@ -135,7 +135,7 @@ impl Transform {
                     },
                     "scale" => {
                         let sx = Number::parse(context, input)?;
-                        if input.r#try(|input| input.expect_comma()).is_ok() {
+                        if input.try(|input| input.expect_comma()).is_ok() {
                             let sy = Number::parse(context, input)?;
                             Ok(generic::TransformOperation::Scale(sx, Some(sy)))
                         } else {
@@ -191,7 +191,7 @@ impl Transform {
                     },
                     "skew" => {
                         let ax = specified::Angle::parse_with_unitless(context, input)?;
-                        if input.r#try(|input| input.expect_comma()).is_ok() {
+                        if input.try(|input| input.expect_comma()).is_ok() {
                             let ay = specified::Angle::parse_with_unitless(context, input)?;
                             Ok(generic::TransformOperation::Skew(ax, Some(ay)))
                         } else {
@@ -248,17 +248,17 @@ impl Parse for TransformOrigin {
     ) -> Result<Self, ParseError<'i>> {
         let parse_depth = |input: &mut Parser| {
             input
-                .r#try(|i| Length::parse(context, i))
+                .try(|i| Length::parse(context, i))
                 .unwrap_or(Length::from_px(0.))
         };
-        match input.r#try(|i| OriginComponent::parse(context, i)) {
+        match input.try(|i| OriginComponent::parse(context, i)) {
             Ok(x_origin @ OriginComponent::Center) => {
-                if let Ok(y_origin) = input.r#try(|i| OriginComponent::parse(context, i)) {
+                if let Ok(y_origin) = input.try(|i| OriginComponent::parse(context, i)) {
                     let depth = parse_depth(input);
                     return Ok(Self::new(x_origin, y_origin, depth));
                 }
                 let y_origin = OriginComponent::Center;
-                if let Ok(x_keyword) = input.r#try(X::parse) {
+                if let Ok(x_keyword) = input.try(X::parse) {
                     let x_origin = OriginComponent::Side(x_keyword);
                     let depth = parse_depth(input);
                     return Ok(Self::new(x_origin, y_origin, depth));
@@ -267,7 +267,7 @@ impl Parse for TransformOrigin {
                 return Ok(Self::new(x_origin, y_origin, depth));
             },
             Ok(x_origin) => {
-                if let Ok(y_origin) = input.r#try(|i| OriginComponent::parse(context, i)) {
+                if let Ok(y_origin) = input.try(|i| OriginComponent::parse(context, i)) {
                     let depth = parse_depth(input);
                     return Ok(Self::new(x_origin, y_origin, depth));
                 }
@@ -279,12 +279,12 @@ impl Parse for TransformOrigin {
         }
         let y_keyword = Y::parse(input)?;
         let y_origin = OriginComponent::Side(y_keyword);
-        if let Ok(x_keyword) = input.r#try(X::parse) {
+        if let Ok(x_keyword) = input.try(X::parse) {
             let x_origin = OriginComponent::Side(x_keyword);
             let depth = parse_depth(input);
             return Ok(Self::new(x_origin, y_origin, depth));
         }
-        if input.r#try(|i| i.expect_ident_matching("center")).is_ok() {
+        if input.try(|i| i.expect_ident_matching("center")).is_ok() {
             let x_origin = OriginComponent::Center;
             let depth = parse_depth(input);
             return Ok(Self::new(x_origin, y_origin, depth));
@@ -303,10 +303,10 @@ where
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if input.r#try(|i| i.expect_ident_matching("center")).is_ok() {
+        if input.try(|i| i.expect_ident_matching("center")).is_ok() {
             return Ok(OriginComponent::Center);
         }
-        if let Ok(lop) = input.r#try(|i| LengthOrPercentage::parse(context, i)) {
+        if let Ok(lop) = input.try(|i| LengthOrPercentage::parse(context, i)) {
             return Ok(OriginComponent::Length(lop));
         }
         let keyword = S::parse(context, input)?;
@@ -353,11 +353,11 @@ impl Parse for Rotate {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if input.r#try(|i| i.expect_ident_matching("none")).is_ok() {
+        if input.try(|i| i.expect_ident_matching("none")).is_ok() {
             return Ok(generic::Rotate::None);
         }
 
-        if let Ok(rx) = input.r#try(|i| Number::parse(context, i)) {
+        if let Ok(rx) = input.try(|i| Number::parse(context, i)) {
             // 'rotate: <number>{3} <angle>'
             let ry = Number::parse(context, input)?;
             let rz = Number::parse(context, input)?;
@@ -379,13 +379,13 @@ impl Parse for Translate {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if input.r#try(|i| i.expect_ident_matching("none")).is_ok() {
+        if input.try(|i| i.expect_ident_matching("none")).is_ok() {
             return Ok(generic::Translate::None);
         }
 
         let tx = specified::LengthOrPercentage::parse(context, input)?;
-        if let Ok(ty) = input.r#try(|i| specified::LengthOrPercentage::parse(context, i)) {
-            if let Ok(tz) = input.r#try(|i| specified::Length::parse(context, i)) {
+        if let Ok(ty) = input.try(|i| specified::LengthOrPercentage::parse(context, i)) {
+            if let Ok(tz) = input.try(|i| specified::Length::parse(context, i)) {
                 // 'translate: <length-percentage> <length-percentage> <length>'
                 return Ok(generic::Translate::Translate3D(tx, ty, tz));
             }
@@ -410,13 +410,13 @@ impl Parse for Scale {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if input.r#try(|i| i.expect_ident_matching("none")).is_ok() {
+        if input.try(|i| i.expect_ident_matching("none")).is_ok() {
             return Ok(generic::Scale::None);
         }
 
         let sx = Number::parse(context, input)?;
-        if let Ok(sy) = input.r#try(|i| Number::parse(context, i)) {
-            if let Ok(sz) = input.r#try(|i| Number::parse(context, i)) {
+        if let Ok(sy) = input.try(|i| Number::parse(context, i)) {
+            if let Ok(sz) = input.try(|i| Number::parse(context, i)) {
                 // 'scale: <number> <number> <number>'
                 return Ok(generic::Scale::Scale3D(sx, sy, sz));
             }
diff --git a/components/style/values/specified/ui.rs b/components/style/values/specified/ui.rs
index e3ea599aa4c..5adfcaa7f70 100644
--- a/components/style/values/specified/ui.rs
+++ b/components/style/values/specified/ui.rs
@@ -32,7 +32,7 @@ impl Parse for Cursor {
     ) -> Result<Self, ParseError<'i>> {
         let mut images = vec![];
         loop {
-            match input.r#try(|input| CursorImage::parse(context, input)) {
+            match input.try(|input| CursorImage::parse(context, input)) {
                 Ok(image) => images.push(image),
                 Err(_) => break,
             }
@@ -64,7 +64,7 @@ impl Parse for CursorImage {
     ) -> Result<Self, ParseError<'i>> {
         Ok(Self {
             url: SpecifiedImageUrl::parse(context, input)?,
-            hotspot: match input.r#try(|input| Number::parse(context, input)) {
+            hotspot: match input.try(|input| Number::parse(context, input)) {
                 Ok(number) => Some((number, Number::parse(context, input)?)),
                 Err(_) => None,
             },
@@ -131,7 +131,7 @@ impl Parse for ScrollbarColor {
         context: &ParserContext,
         input: &mut Parser<'i, 't>,
     ) -> Result<Self, ParseError<'i>> {
-        if input.r#try(|i| i.expect_ident_matching("auto")).is_ok() {
+        if input.try(|i| i.expect_ident_matching("auto")).is_ok() {
             return Ok(generics::ScrollbarColor::Auto);
         }
         Ok(generics::ScrollbarColor::Colors {
diff --git a/components/style_traits/values.rs b/components/style_traits/values.rs
index 575bf5183d9..0fe3ba767c6 100644
--- a/components/style_traits/values.rs
+++ b/components/style_traits/values.rs
@@ -324,7 +324,7 @@ impl Separator for Space {
         let mut results = vec![parse_one(input)?];
         loop {
             input.skip_whitespace(); // Unnecessary for correctness, but may help try() rewind less.
-            if let Ok(item) = input.r#try(&mut parse_one) {
+            if let Ok(item) = input.try(&mut parse_one) {
                 results.push(item);
             } else {
                 return Ok(results);
@@ -350,9 +350,9 @@ impl Separator for CommaWithSpace {
         loop {
             input.skip_whitespace(); // Unnecessary for correctness, but may help try() rewind less.
             let comma_location = input.current_source_location();
-            let comma = input.r#try(|i| i.expect_comma()).is_ok();
+            let comma = input.try(|i| i.expect_comma()).is_ok();
             input.skip_whitespace(); // Unnecessary for correctness, but may help try() rewind less.
-            if let Ok(item) = input.r#try(&mut parse_one) {
+            if let Ok(item) = input.try(&mut parse_one) {
                 results.push(item);
             } else if comma {
                 return Err(comma_location.new_unexpected_token_error(Token::Comma));