Raw ident for struct member prefixes "r-" to parameter and value names

[Arnavion]

• structopt v0.3.2
• structopt-derive v0.3.2

#[derive(structopt::StructOpt)]
struct Options {
    #[structopt(long)]
    r#type: String,
}

fn main() {
    let _: Options = structopt::StructOpt::from_args();
}

$ cargo run -- --help

rust-test 0.1.0

USAGE:
    rust-test --r-type <r-type>

FLAGS:
    -h, --help       Prints help information
    -V, --version    Prints version information

OPTIONS:
        --r-type <r-type>

The parameter long name --r-type should be --type, and the parameter value string r-type should be type. Basically the r# of the struct member ident should not contribute to the clap::Arg parameters.

(Can be worked around by setting #[structopt(long = "type", name = "type")] explicitly.)

[CreepySkeleton]

@TeXitoi This is more of a bug than enhancement

[TeXitoi]

I put it as enhancement as this case was not documented, and the result, even if surprising, is not problematic. I agree that we can correct this without changing version.

[Arnavion]

Technically it would be a breaking change for anyone who was relying on the behavior, eg their scripts (and the scripts of their binary's users) that used --r-type would stop working. Though of course that's probably not very likely.