Documentation for value_enum how to print possible values in help

[stepancheg]

Please complete the following tasks

• I have searched the discussions
• I have searched the open and rejected issues

Clap Version

3.2.5

Describe your use case

#[derive(ValueEnum, Clone)]
enum XxxMode {
}

    #[clap(
        long,
        value_enum,
    )]
    mode: XxxMode,

--help does not print possible values of enum.

Describe the solution you'd like

The solution I've found:

    #[clap(
        long,
        value_enum,
        possible_values = XxxMode::value_variants()
            .iter()
            .map(|v| v.to_possible_value().unwrap()),
    )]
    mode: XxxMode,

But it is not mentioned anywhere in documentation (e.g. in derive reference, or next to ValueEnum documentation).

(Also it should probably be default behavior to print possible values for value_enum).

Alternatives, if applicable

No response

Additional Context

No response

[stepancheg]

Sorry, it works without this trick. Something didn't work before, but I don't know what I did when it didn't work.