error[E0277]: the trait bound `bool: ArgEnum` is not satisfied
   --> tests/derive_ui/bool_arg_enum.rs:7:11
    |
7   |     opts: bool,
    |           ^^^^ the trait `ArgEnum` is not implemented for `bool`
    |
note: required by `clap::ArgEnum::from_str`
   --> src/derive.rs
    |
    |     fn from_str(input: &str, ignore_case: bool) -> Result<Self, String> {
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error[E0618]: expected function, found enum variant `bool`
 --> tests/derive_ui/bool_arg_enum.rs:7:11
  |
7 |     opts: bool,
  |           ^^^^ call expression requires function
  |
help: `bool` is a unit variant, you need to write it without the parenthesis
  |
7 |     opts: bool,
  |           ~~~~

warning: use of deprecated associated function `clap::Arg::<'help>::possible_values`: Replaced with `Arg::value_parser(PossibleValuesParser::new(...)).takes_value(true)`
 --> tests/derive_ui/bool_arg_enum.rs:7:11
  |
7 |     opts: bool,
  |           ^^^^
  |
  = note: `#[warn(deprecated)]` on by default

error[E0277]: the trait bound `bool: ArgEnum` is not satisfied
   --> tests/derive_ui/bool_arg_enum.rs:7:11
    |
7   |     opts: bool,
    |           ^^^^ the trait `ArgEnum` is not implemented for `bool`
    |
note: required by `value_variants`
   --> src/derive.rs
    |
    |     fn value_variants<'a>() -> &'a [Self];
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error[E0277]: the trait bound `bool: ArgEnum` is not satisfied
   --> tests/derive_ui/bool_arg_enum.rs:6:5
    |
6   | /     #[clap(short, arg_enum)]
7   | |     opts: bool,
    | |______________^ the trait `ArgEnum` is not implemented for `bool`
    |
note: required by a bound in `ArgEnum`
   --> src/derive.rs
    |
    | / pub trait ArgEnum: Sized + Clone {
    | |     /// All possible argument values, in display order.
    | |     fn value_variants<'a>() -> &'a [Self];
    | |
...   |
    | |     fn to_possible_value<'a>(&self) -> Option<PossibleValue<'a>>;
    | | }
    | |_^ required by this bound in `ArgEnum`

warning: use of deprecated associated function `clap::Arg::<'help>::possible_values`: Replaced with `Arg::value_parser(PossibleValuesParser::new(...)).takes_value(true)`
 --> tests/derive_ui/bool_arg_enum.rs:7:11
  |
7 |     opts: bool,
  |           ^^^^