Separate Opt into separate mod

src/choice.rs

@@ -80,7 +80,8 @@ impl Choice {
 #[cfg(test)]
 mod tests {
 
-    use crate::config::{Config, Opt};
+    use crate::config::Config;
+    use crate::opt::Opt;
     use std::ffi::OsString;
     use std::io::{self, BufWriter, Write};
     use structopt::StructOpt;

src/config.rs

@@ -1,36 +1,9 @@
 use regex::Regex;
 use std::num::ParseIntError;
-use std::path::PathBuf;
 use std::process;
-use structopt::StructOpt;
 
 use crate::choice::Choice;
-
-#[derive(Debug, StructOpt)]
-#[structopt(name = "choose", about = "`choose` sections from each line of files")]
-pub struct Opt {
-    /// Specify field separator other than whitespace
-    #[structopt(short, long)]
-    pub field_separator: Option<String>,
-
-    /// Use exclusive ranges, similar to array slicing in many programming languages
-    #[structopt(short = "x", long)]
-    pub exclusive: bool,
-
-    /// Activate debug mode
-    #[structopt(short, long)]
-    pub debug: bool,
-
-    /// Input file
-    #[structopt(short, long, parse(from_os_str))]
-    pub input: Option<PathBuf>,
-
-    /// Fields to print. Either x, x:, :y, or x:y, where x and y are integers, colons indicate a
-    /// range, and an empty field on either side of the colon continues to the beginning or end of
-    /// the line.
-    #[structopt(required = true, min_values = 1, parse(try_from_str = Config::parse_choice))]
-    pub choice: Vec<Choice>,
-}
+use crate::opt::Opt;
 
 lazy_static! {
     static ref PARSE_CHOICE_RE: Regex = Regex::new(r"^(\d*):(\d*)$").unwrap();

src/main.rs

@@ -7,11 +7,13 @@ extern crate lazy_static;
 
 mod choice;
 mod config;
+mod opt;
 mod reader;
 use config::Config;
+use opt::Opt;
 
 fn main() {
-    let opt = config::Opt::from_args();
+    let opt = Opt::from_args();
     let config = Config::new(opt);
 
     let read = match &config.opt.input {

src/opt.rs

@@ -0,0 +1,32 @@
+use std::path::PathBuf;
+use structopt::StructOpt;
+
+use crate::choice::Choice;
+use crate::config::Config;
+
+#[derive(Debug, StructOpt)]
+#[structopt(name = "choose", about = "`choose` sections from each line of files")]
+pub struct Opt {
+    /// Specify field separator other than whitespace
+    #[structopt(short, long)]
+    pub field_separator: Option<String>,
+
+    /// Use exclusive ranges, similar to array slicing in many programming languages
+    #[structopt(short = "x", long)]
+    pub exclusive: bool,
+
+    /// Activate debug mode
+    #[structopt(short, long)]
+    pub debug: bool,
+
+    /// Input file
+    #[structopt(short, long, parse(from_os_str))]
+    pub input: Option<PathBuf>,
+
+    /// Fields to print. Either x, x:, :y, or x:y, where x and y are integers, colons indicate a
+    /// range, and an empty field on either side of the colon continues to the beginning or end of
+    /// the line.
+    #[structopt(required = true, min_values = 1, parse(try_from_str = Config::parse_choice))]
+    pub choice: Vec<Choice>,
+}
+