SOURCE_FILE
  MACRO_RULES
    COMMENT "/// Some docs"
    WHITESPACE "\n"
    ATTR
      POUND "#"
      L_BRACK "["
      META
        PATH
          PATH_SEGMENT
            NAME_REF
              IDENT "macro_export"
      R_BRACK "]"
    WHITESPACE "\n"
    MACRO_RULES_KW "macro_rules"
    BANG "!"
    WHITESPACE " "
    NAME
      IDENT "foo"
    WHITESPACE " "
    TOKEN_TREE
      L_CURLY "{"
      WHITESPACE "\n    "
      TOKEN_TREE
        L_PAREN "("
        R_PAREN ")"
      WHITESPACE " "
      EQ "="
      R_ANGLE ">"
      WHITESPACE " "
      TOKEN_TREE
        L_CURLY "{"
        R_CURLY "}"
      SEMICOLON ";"
      WHITESPACE "\n"
      R_CURLY "}"
  WHITESPACE "\n"