separate DecoratorMarker from Decorator

crates/typst-syntax/src/highlight.rs

@@ -286,8 +286,8 @@ pub fn highlight(node: &LinkedNode) -> Option<Tag> {
         SyntaxKind::Destructuring => None,
         SyntaxKind::DestructAssignment => None,
 
-        // TODO
+        SyntaxKind::DecoratorMarker => Some(Tag::Comment),
-        SyntaxKind::Decorator => Some(Tag::Comment),
+        SyntaxKind::Decorator => None,
 
         SyntaxKind::LineComment => Some(Tag::Comment),
         SyntaxKind::BlockComment => Some(Tag::Comment),

crates/typst-syntax/src/kind.rs

@@ -13,6 +13,8 @@ pub enum SyntaxKind {
     LineComment,
     /// A block comment: `/* ... */`.
     BlockComment,
+    /// A decorator's marker: `/!`
+    DecoratorMarker,
 
     /// The contents of a file or content block.
     Markup,
@@ -374,6 +376,7 @@ impl SyntaxKind {
             Self::Error => "syntax error",
             Self::LineComment => "line comment",
             Self::BlockComment => "block comment",
+            Self::DecoratorMarker => "decorator marker",
             Self::Markup => "markup",
             Self::Text => "text",
             Self::Space => "space",

crates/typst-syntax/src/lexer.rs

@@ -233,7 +233,7 @@ impl Lexer<'_> {
         // Already collected all we need from the decorator.
         self.s.jump(start + 2);
 
-        SyntaxKind::Decorator
+        SyntaxKind::DecoratorMarker
     }
 }