SOURCE_FILE
  FN
    FN_KW "fn"
    WHITESPACE " "
    NAME
      IDENT "main"
    PARAM_LIST
      L_PAREN "("
      R_PAREN ")"
    WHITESPACE " "
    BLOCK_EXPR
      STMT_LIST
        L_CURLY "{"
        WHITESPACE "\n    "
        EXPR_STMT
          FORMAT_ARGS_EXPR
            BUILTIN_KW "builtin"
            POUND "#"
            FORMAT_ARGS_KW "format_args"
            L_PAREN "("
            LITERAL
              STRING "\"{type}\""
            COMMA ","
            WHITESPACE " "
            FORMAT_ARGS_ARG
              FORMAT_ARGS_ARG_NAME
                TYPE_KW "type"
                EQ "="
              LITERAL
                INT_NUMBER "1"
            R_PAREN ")"
          SEMICOLON ";"
        WHITESPACE "\n"
        R_CURLY "}"
  WHITESPACE "\n"
