message: Patch grammar
  Allow signed integers
  Disallow floating point numbers
diff: @@ -28,7 +28,7 @@ vop.3: IDENT ":" type "=" CNAME IDENT* ";"
  eop.2: CNAME IDENT* ";"
  label.1: IDENT ":"
  -lit: NUMBER -> int
  +lit: SIGNED_INT -> int
  | BOOL -> bool
  type: CNAME
  @@ -36,7 +36,7 @@ BOOL: "true" | "false"
  IDENT: ("_"|"%"|LETTER) ("_"|"%"|"."|LETTER|DIGIT)*
  COMMENT: /#.*/
  -%import common.NUMBER
  +%import common.SIGNED_INT
  %import common.WS
  %import common.CNAME
  %import common.LETTER
  