feat(derive): Expose control over Actions #3794
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This is the derive support for clap-rs#3774 (see also clap-rs#3775, clap-rs#3777) This combined with `value_parser` replaces `parser`. The main frustration with this is that `ArgAction::Count` (the replacement for `parse(from_occurrences)` must be a `u64`. We could come up with a magic attribute that is meant to be the value parser's parsed type. We could then use `TryFrom` to convert the parsed type to the user's type to allow more. That is an exercise for the future. Alternatively, we have clap-rs#3792. Prep for this included - clap-rs#3782 - clap-rs#3783 - clap-rs#3786 - clap-rs#3789 - clap-rs#3793
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This is the derive support for #3774 (see also #3775, #3777)
This combined with
value_parserreplacesparser. The mainfrustration with this is that
ArgAction::Count(the replacement forparse(from_occurrences)must be au64. We could come up with amagic attribute that is meant to be the value parser's parsed type. We
could then use
TryFromto convert the parsed type to the user's typeto allow more. That is an exercise for the future. Alternatively, we
have #3792.
Prep for this included