feat(rome_js_parser): EcmaScript @decorators rome#4252

Implement basic decorator cases for classes

crates/rome_js_formatter/src/generated.rs

@@ -6807,6 +6807,40 @@ impl IntoFormat<JsFormatContext> for rome_js_syntax::TsThisParameter {
         )
     }
 }
+impl FormatRule<rome_js_syntax::JsDecorator>
+    for crate::js::auxiliary::decorator::FormatJsDecorator
+{
+    type Context = JsFormatContext;
+    #[inline(always)]
+    fn fmt(&self, node: &rome_js_syntax::JsDecorator, f: &mut JsFormatter) -> FormatResult<()> {
+        FormatNodeRule::<rome_js_syntax::JsDecorator>::fmt(self, node, f)
+    }
+}
+impl AsFormat<JsFormatContext> for rome_js_syntax::JsDecorator {
+    type Format<'a> = FormatRefWithRule<
+        'a,
+        rome_js_syntax::JsDecorator,
+        crate::js::auxiliary::decorator::FormatJsDecorator,
+    >;
+    fn format(&self) -> Self::Format<'_> {
+        FormatRefWithRule::new(
+            self,
+            crate::js::auxiliary::decorator::FormatJsDecorator::default(),
+        )
+    }
+}
+impl IntoFormat<JsFormatContext> for rome_js_syntax::JsDecorator {
+    type Format = FormatOwnedWithRule<
+        rome_js_syntax::JsDecorator,
+        crate::js::auxiliary::decorator::FormatJsDecorator,
+    >;
+    fn into_format(self) -> Self::Format {
+        FormatOwnedWithRule::new(
+            self,
+            crate::js::auxiliary::decorator::FormatJsDecorator::default(),
+        )
+    }
+}
 impl FormatRule<rome_js_syntax::TsAnyType> for crate::ts::types::any_type::FormatTsAnyType {
     type Context = JsFormatContext;
     #[inline(always)]
@@ -9843,6 +9877,31 @@ impl IntoFormat<JsFormatContext> for rome_js_syntax::JsConstructorParameterList
         )
     }
 }
+impl AsFormat<JsFormatContext> for rome_js_syntax::JsDecoratorList {
+    type Format<'a> = FormatRefWithRule<
+        'a,
+        rome_js_syntax::JsDecoratorList,
+        crate::js::lists::decorator_list::FormatJsDecoratorList,
+    >;
+    fn format(&self) -> Self::Format<'_> {
+        FormatRefWithRule::new(
+            self,
+            crate::js::lists::decorator_list::FormatJsDecoratorList::default(),
+        )
+    }
+}
+impl IntoFormat<JsFormatContext> for rome_js_syntax::JsDecoratorList {
+    type Format = FormatOwnedWithRule<
+        rome_js_syntax::JsDecoratorList,
+        crate::js::lists::decorator_list::FormatJsDecoratorList,
+    >;
+    fn into_format(self) -> Self::Format {
+        FormatOwnedWithRule::new(
+            self,
+            crate::js::lists::decorator_list::FormatJsDecoratorList::default(),
+        )
+    }
+}
 impl AsFormat<JsFormatContext> for rome_js_syntax::JsDirectiveList {
     type Format<'a> = FormatRefWithRule<
         'a,

crates/rome_js_formatter/src/js/auxiliary/decorator.rs

@@ -0,0 +1,10 @@
+use crate::prelude::*;
+use rome_js_syntax::JsDecorator;
+use rome_rowan::AstNode;
+#[derive(Debug, Clone, Default)]
+pub(crate) struct FormatJsDecorator;
+impl FormatNodeRule<JsDecorator> for FormatJsDecorator {
+    fn fmt_fields(&self, node: &JsDecorator, f: &mut JsFormatter) -> FormatResult<()> {
+        format_verbatim_node(node.syntax()).fmt(f)
+    }
+}

crates/rome_js_formatter/src/js/auxiliary/mod.rs

@@ -4,6 +4,7 @@ pub(crate) mod accessor_modifier;
 pub(crate) mod array_hole;
 pub(crate) mod case_clause;
 pub(crate) mod catch_clause;
+pub(crate) mod decorator;
 pub(crate) mod default_clause;
 pub(crate) mod directive;
 pub(crate) mod else_clause;

crates/rome_js_formatter/src/js/lists/decorator_list.rs

@@ -0,0 +1,12 @@
+use crate::prelude::*;
+use rome_js_syntax::JsDecoratorList;
+#[derive(Debug, Clone, Default)]
+pub(crate) struct FormatJsDecoratorList;
+impl FormatRule<JsDecoratorList> for FormatJsDecoratorList {
+    type Context = JsFormatContext;
+    fn fmt(&self, node: &JsDecoratorList, f: &mut JsFormatter) -> FormatResult<()> {
+        f.join_with(&soft_line_break_or_space())
+            .entries(node.iter().formatted())
+            .finish()
+    }
+}

crates/rome_js_formatter/src/js/lists/mod.rs

@@ -7,6 +7,7 @@ pub(crate) mod call_argument_list;
 pub(crate) mod class_member_list;
 pub(crate) mod constructor_modifier_list;
 pub(crate) mod constructor_parameter_list;
+pub(crate) mod decorator_list;
 pub(crate) mod directive_list;
 pub(crate) mod export_named_from_specifier_list;
 pub(crate) mod export_named_specifier_list;

crates/rome_js_formatter/src/utils/format_class.rs

@@ -42,6 +42,7 @@ impl<'a> From<&'a AnyJsClass> for FormatClass<'a> {
 
 impl Format<JsFormatContext> for FormatClass<'_> {
     fn fmt(&self, f: &mut Formatter<JsFormatContext>) -> FormatResult<()> {
+        let decorators = self.class.decorators();
         let abstract_token = self.class.abstract_token();
         let id = self.class.id()?;
         let extends = self.class.extends_clause();
@@ -52,6 +53,8 @@ impl Format<JsFormatContext> for FormatClass<'_> {
 
         let group_mode = self.should_group(f.comments())?;
 
+        write!(f, [decorators.format()])?;
+
         if let Some(abstract_token) = abstract_token {
             write!(f, [abstract_token.format(), space()])?;
         }