Default that depends on previous arg

[sr-gi]

Is it possible to have a default from arg B that depends on the value of arg A, e.g:

struct Cli {
    #[clap(long, short, default_value_t = SOME_VALUE)]
    A: u64,
    #[clap(long, short, default_value_t = A*10)]
    B: u64,
}

Alternatively, is there a way of making B required if A is not defaulted?

[epage]

Is it possible to have a default from arg B that depends on the value of arg A,

At this time, no. We'd likely defer this to #3476.

Alternatively, is there a way of making B required if A is not defaulted?

On A could you put requires = "B"? We have a couple different requires or required functions to check out. I always get the relationships of these backwards, so check the other requires or required functions we have if that on doesn't work. If not, likely would point to #3476

[sr-gi]

I think I can use your workaround with "requires" for now. Thanks!