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use std::path::PathBuf;
use structopt::StructOpt;
use crate::choice::Choice;
use crate::escape;
use crate::parse;
#[derive(Debug, StructOpt)]
#[structopt(name = "choose", about = "`choose` sections from each line of files")]
#[structopt(setting = structopt::clap::AppSettings::AllowLeadingHyphen)]
pub struct Opt {
/// Choose fields by character number
#[structopt(short, long)]
pub character_wise: bool,
/// Activate debug mode
#[structopt(short, long)]
pub debug: bool,
/// Use exclusive ranges, similar to array indexing in many programming languages
#[structopt(short = "x", long)]
pub exclusive: bool,
/// Specify field separator other than whitespace, using Rust `regex` syntax
#[structopt(short, long)]
pub field_separator: Option<String>,
/// Input file
#[structopt(short, long, parse(from_os_str))]
pub input: Option<PathBuf>,
/// Use non-greedy field separators
#[structopt(short, long)]
pub non_greedy: bool,
/// Index from 1 instead of 0
#[structopt(long)]
pub one_indexed: bool,
/// Specify output field separator
#[structopt(short, long, parse(from_str = escape::process_escapes))]
pub output_field_separator: Option<String>,
/// Fields to print. Either a, a:b, a..b, or a..=b, where a and b are integers. The beginning
/// or end of a range can be omitted, resulting in including the beginning or end of the line,
/// respectively. a:b is inclusive of b (unless overridden by -x). a..b is
/// exclusive of b and a..=b is inclusive of b.
#[structopt(required = true, min_values = 1, parse(try_from_str = parse::choice))]
pub choices: Vec<Choice>,
}
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