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use structopt_derive::*;
#[derive(Debug,StructOpt)]
#[structopt(name = "csv_challenge",about="An example of StructOpt usage.")]
pub struct Opt{
    #[structopt(help = "Input File")]
    pub input: String,
    #[structopt(help = "Column Name")]
    pub column_name: String,
    #[structopt(help = "Replacement  Column Name")]
    pub replacement: String,
    #[structopt(help = "Output file. stdout if not present")]
    pub output: Option<String>,
}