How to simultaneously set whitespace and comma as a value_delimiter?

[Andrew15-5]

Right now, it seems that clap can parse Vec<String> flag as --flag a --flag b and as --flag 'a b' and --flag a,b at least for this (idk how cargo parses -F, maybe it handles both comma and space). But I don't understand how to make value_delimiter use comma and whitespace to separate array items within one flag argument for custom types, or even for key=value arguments.

I looked into IntoResettable, but didn't find any [&str] or Vec<&str>, and I don't even know how to set &str and what its behavior (e.g., ", "). So far, I can explicitly set only one of the chars.

I assume I can't, but somehow I can parse the raw argument into slice or something, so that clap then automatically will concatenate them into the vector.

[epage]

There is not a native way to do this today. Cargo does not use value_delimiter but manually splitting.

If you decide to make an issue, it would be helpful if you searched for any past discussions on this. It would help expedite things.

[Andrew15-5]

Do you mean I can't use value_parser to parse per-flag arrays of arguments that are put into a single vector? Or is this technically not a native way to do this?

I'm not sure how do I search for anything from the past, if there is anything at all. I didn't find anything that is specifically about this, just a bunch of value_delimiter-related stuff.

[epage]

Yes, you can also use a value_parser though that will create a Vec<Vec<T>>, like parsing it yourself.

Yeah,. I'm surprised I'm not seeing any other issues about this.

[Andrew15-5]

https://github.com/rust-lang/cargo/blob/37eeab7c165aaccc7c70dfdf2bbd239cbd2b7269/src/bin/cargo/commands/add.rs?plain=1#L282-L287

https://github.com/rust-lang/cargo/blob/37eeab7c165aaccc7c70dfdf2bbd239cbd2b7269/src/bin/cargo/commands/add.rs?plain=1#L410-L417

Hmm, so it does do kinda exactly what I thought and you describe. It does have to flatten the nested array structure. And the author is you as well, hm. I guess you would've used the .value_delimiter([' ', ',']) if it was available (3 years ago). It actually also checks for empty elements, which means it will not error on a,c, argument? Not the case with built-in clap parser. This is probably a second feature that is missing.

#6079
#6080