added comments

examples/comment.truck

@@ -0,0 +1,7 @@
+/* this is a comment */
+
+/*
+ * but comments cannot be nested 
+ */
+
+println(/* value 1 */ 10 + /* value 2 */ 20)

truck/lexer.py

@@ -36,6 +36,14 @@ def next(self):
 
         current = self.source[self.index]
 
+        if current == '/' and self.source[self.index + 1] == '*':
+            self.index += 2
+            while not (current == '*' and self.source[self.index + 1] == '/'):
+                self.index += 1
+                current = self.source[self.index]
+            self.index += 2
+            return self.next()
+
         if current in self.symbols:
             self.value = current
             self.index += 1

vim/syntax/truck.vim

@@ -33,9 +33,13 @@ syntax match truckOpreator "\v\*"
 syntax match truckOpreator "\v\/"
 highlight link truckOperator Operator
 
-syntax match truckString "\v\".*\""
-syntax match truckString "\v\'.*\'"
+syntax region truckString start=/\v"/ skip=/\v\\./ end=/\v"/
+syntax region truckString start=/\v'/ skip=/\v\\./ end=/\v'/
 highlight link truckString String
 
 syntax match truckNumber "\v\d+"
 highlight link truckNumber Number
+
+syntax region truckComment start=/\v\/\*/ end=/\v\*\//
+highlight link truckComment Comment
+