error: unexpected end of input, expected identifier
 --> tests/ui/fn_helper_errors.rs:3:1
  |
3 | #[parser(reader:)]
  | ^^^^^^^^^^^^^^^^^^
  |
  = note: this error originates in the attribute macro `parser` (in Nightly builds, run with -Z macro-backtrace for more info)

error: expected `:`
 --> tests/ui/fn_helper_errors.rs:8:17
  |
8 | #[parser(reader = invalid)]
  |                 ^

error: expected `reader` or `endian`
  --> tests/ui/fn_helper_errors.rs:13:10
   |
13 | #[parser(invalid)]
   |          ^^^^^^^

error: expected `writer` or `endian`
  --> tests/ui/fn_helper_errors.rs:18:10
   |
18 | #[writer(invalid)]
   |          ^^^^^^^

error: conflicting `reader` keyword
  --> tests/ui/fn_helper_errors.rs:23:18
   |
23 | #[parser(reader, reader)]
   |                  ^^^^^^

error: conflicting `writer` keyword
  --> tests/ui/fn_helper_errors.rs:28:18
   |
28 | #[writer(writer, writer)]
   |                  ^^^^^^

error: conflicting `endian` keyword
  --> tests/ui/fn_helper_errors.rs:33:18
   |
33 | #[parser(endian, endian)]
   |                  ^^^^^^

error: invalid `self` in free function
  --> tests/ui/fn_helper_errors.rs:41:31
   |
41 |     fn fn_helper_invalid_self(&self) -> BinResult<()> {
   |                               ^^^^^

error: missing required value parameter
  --> tests/ui/fn_helper_errors.rs:47:4
   |
47 | fn fn_helper_missing_object() -> BinResult<()> {
   |    ^^^^^^^^^^^^^^^^^^^^^^^^

error: missing raw arguments parameter
  --> tests/ui/fn_helper_errors.rs:52:34
   |
52 | fn fn_helper_missing_args_reader(...) -> BinResult<()> {
   |                                  ^^^

error: unexpected extra parameter after raw arguments
  --> tests/ui/fn_helper_errors.rs:57:43
   |
57 | fn fn_helper_extra_args_reader(_arg0: (), _arg1: (), ...) -> BinResult<()> {
   |                                           ^^^^^^^^^

error: unexpected extra parameter after raw arguments
  --> tests/ui/fn_helper_errors.rs:62:55
   |
62 | fn fn_helper_extra_args_writer(_arg0: &(), _arg1: (), _arg2: (), ...) -> BinResult<()> {
   |                                                       ^^^^^^^^^

error: missing raw arguments parameter
  --> tests/ui/fn_helper_errors.rs:67:45
   |
67 | fn fn_helper_missing_args_writer(_obj: &(), ...) -> BinResult<()> {
   |                                             ^^^