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Allow customizing styling of `[default]`, `[possible values]`, `[env]` in arg description

8

### Please complete the following tasks - [X] I have searched the [discussions](https://github.com/clap-rs/clap/discussions) - [X] I have searched the [open](https://github.com/clap-rs/clap/issues) and [rejected](https://github.com/clap-rs/clap/issues?q=is%3Aissue+label%3AS-wont-fix+is%3Aclosed) issues ### Clap Version 4.3.3 ### Describe your...

epage

`UnknownArgumentValueParser` can only be used with string value argument

2

### Please complete the following tasks - [X] I have searched the [discussions](https://github.com/clap-rs/clap/discussions) - [X] I have searched the [open](https://github.com/clap-rs/clap/issues) and [rejected](https://github.com/clap-rs/clap/issues?q=is%3Aissue+label%3AS-wont-fix+is%3Aclosed) issues ### Rust Version rustc 1.72.0-beta.11 (7a3a43a3b 2023-08-18)...

weihanglo

Error message APIs for `TypedValueParser`

8

## Clap Version 4.3.19 ## Describe your use case I'm implementing `TypedValueParser` and `ValueParserFactory` so that I can use `clap` to parse custom types, ideally without explicitly annotating the `value_parser`...

9999years

epage

`requires` is bypassed when other items from a mutually-exclusive `group` are present

5

### Please complete the following tasks - [X] I have searched the [discussions](https://github.com/clap-rs/clap/discussions) - [X] I have searched the [open](https://github.com/clap-rs/clap/issues) and [rejected](https://github.com/clap-rs/clap/issues?q=is%3Aissue+label%3AS-wont-fix+is%3Aclosed) issues ### Rust Version rustc 1.65.0 (897e37553 2022-11-02)...

mkeeter

Avoid printing trailing whitespace in help output

1

### Please complete the following tasks - [X] I have searched the [discussions](https://github.com/clap-rs/clap/discussions) - [X] I have searched the [open](https://github.com/clap-rs/clap/issues) and [rejected](https://github.com/clap-rs/clap/issues?q=is%3Aissue+label%3AS-wont-fix+is%3Aclosed) issues ### Clap Version 4.3.21 ### Describe your...

djc

Variant of allow_hyphen_values that treats `--` like a regular value

4

### Please complete the following tasks - [X] I have searched the [discussions](https://github.com/clap-rs/clap/discussions) - [X] I have searched the [open](https://github.com/clap-rs/clap/issues) and [rejected](https://github.com/clap-rs/clap/issues?q=is%3Aissue+label%3AS-wont-fix+is%3Aclosed) issues ### Clap Version 4.2.7 ### Describe your...

RalfJung

Please support `flatten`ing an `Args` and mutating arguments before merging

5

### Please complete the following tasks - [X] I have searched the [discussions](https://github.com/clap-rs/clap/discussions) - [X] I have searched the [open](https://github.com/clap-rs/clap/issues) and [rejected](https://github.com/clap-rs/clap/issues?q=is%3Aissue+label%3AS-wont-fix+is%3Aclosed) issues ### Clap Version 4.3.19 ### Describe your...

joshtriplett

Support custom help messages for completions

1

Some shell completions, such as `fish` and `zsh` allow displaying a help message. Currently, we use the short help, but this might not always be appropriate due to the constraints...

ModProg

Dynamic Completions: Filter and order completions based on input and importance

10

While there are some shell specific behaviors for options, e.g. for `zsh` and `fish`: In `zsh`, options are completed if at least one `-` is present. In `fish` options are...

ModProg