rustutils_seq/
lib.rs

1use clap::Parser;
2use rustutils_runnable::Runnable;
3use std::error::Error;
4
5/// Print numbers from FIRST to LAST, in steps of INCREMENT.
6#[derive(Parser, Clone, Debug)]
7#[clap(author, version, about, long_about = None)]
8pub struct Seq {
9    /// Use printf-style floating-point format
10    #[clap(short, long)]
11    format: Option<String>,
12    /// Use separator to separate numbers.
13    #[clap(short, long, default_value = "\n")]
14    separator: String,
15    /// Equalize width by padding with leading zeroes
16    #[clap(short, long)]
17    equal_width: bool,
18
19    /// First
20    #[clap(default_value = "1")]
21    start: Number,
22    /// Increment
23    #[clap(default_value = "1")]
24    increment: Number,
25    /// End
26    last: Option<Number>,
27}
28
29#[derive(Clone, Debug)]
30pub enum Number {
31    Float(f64),
32    Integer(i64),
33}
34
35impl std::str::FromStr for Number {
36    type Err = Box<dyn Error + Send + Sync + 'static>;
37    fn from_str(value: &str) -> Result<Self, Self::Err> {
38        let number: i64 = value.parse()?;
39        Ok(Number::Integer(number))
40    }
41}
42
43impl Runnable for Seq {
44    fn run(&self) -> Result<(), Box<dyn Error>> {
45        println!("{self:?}");
46        Ok(())
47    }
48}
rustutils_seq/lib.rs

rustutils_seq/
lib.rs
