Add support for * to lexer

Author: benjie

src/language/lexer.ts

@@ -91,6 +91,7 @@ export class Lexer {
 export function isPunctuatorTokenKind(kind: TokenKind): boolean {
   return (
     kind === TokenKind.BANG ||
+    kind === TokenKind.ASTERISK ||
     kind === TokenKind.DOLLAR ||
     kind === TokenKind.AMP ||
     kind === TokenKind.PAREN_L ||
@@ -246,7 +247,7 @@ function readNextToken(lexer: Lexer, start: number): Token {
       //   - FloatValue
       //   - StringValue
       //
-      // Punctuator :: one of ! $ & ( ) ... : = @ [ ] { | }
+      // Punctuator :: one of ! $ & ( ) * ... : = @ [ ] { | }
       case 0x0021: // !
         return createToken(lexer, TokenKind.BANG, position, position + 1);
       case 0x0024: // $
@@ -257,6 +258,8 @@ function readNextToken(lexer: Lexer, start: number): Token {
         return createToken(lexer, TokenKind.PAREN_L, position, position + 1);
       case 0x0029: // )
         return createToken(lexer, TokenKind.PAREN_R, position, position + 1);
+      case 0x002a: // *
+        return createToken(lexer, TokenKind.ASTERISK, position, position + 1);
       case 0x002e: // .
         if (
           body.charCodeAt(position + 1) === 0x002e &&