Add the at token

src/wasm-lib/kcl/src/token.rs

@@ -67,6 +67,8 @@ pub enum TokenType {
     Unknown,
     /// The ? symbol, used for optional values.
     QuestionMark,
+    /// The @ symbol.
+    At,
 }
 
 /// Most KCL tokens correspond to LSP semantic tokens (but not all).
@@ -93,6 +95,7 @@ impl TryFrom<TokenType> for SemanticTokenType {
             | TokenType::DoublePeriod
             | TokenType::Hash
             | TokenType::Dollar
+            | TokenType::At
             | TokenType::Unknown => {
                 anyhow::bail!("unsupported token type: {:?}", token_type)
             }

src/wasm-lib/kcl/src/token/tokeniser.rs

@@ -92,6 +92,7 @@ pub fn token(i: &mut Input<'_>) -> PResult<Token> {
         '}' | ')' | ']' => brace_end,
         ',' => comma,
         '?' => question_mark,
+        '@' => at,
         '0'..='9' => number,
         ':' => colon,
         '.' => alt((number, double_period, period)),
@@ -268,6 +269,16 @@ fn question_mark(i: &mut Input<'_>) -> PResult<Token> {
     ))
 }
 
+fn at(i: &mut Input<'_>) -> PResult<Token> {
+    let (value, range) = '@'.with_span().parse_next(i)?;
+    Ok(Token::from_range(
+        range,
+        i.state.module_id,
+        TokenType::At,
+        value.to_string(),
+    ))
+}
+
 fn colon(i: &mut Input<'_>) -> PResult<Token> {
     let (value, range) = ':'.with_span().parse_next(i)?;
     Ok(Token::from_range(