Scan *

src/lexer.rs

     Identfiier,
     Keyword,
     Number,
+    Star,
     String,
 }
 
         Matcher::new(r#""(.*)""#, TokenType::String),
         Matcher::new(r#"(SELECT|FROM)"#, TokenType::Keyword),
         Matcher::new(r#"[a-z][a-zA-Z_]*"#, TokenType::Identfiier),
-        Matcher::new(r#"[0-9]+"#, TokenType::Number)
+        Matcher::new(r#"[0-9]+"#, TokenType::Number),
+        Matcher::new(r#"\*"#, TokenType::Star),
     ];
 }
 
             vec![Token::new(TokenType::Identfiier, "abc")]
         )
     }
+
+    #[test]
+    fn it_scans_a_star() {
+        assert_eq!(scan("*").unwrap(), vec![Token::new(TokenType::Star, "*")])
+    }
 }