/// common trait for all config modules. This trait provides functions

 /// for de/serializing to/from RON, updating fields, and formatting.

 use serde::{Serialize, Deserialize};

 use crate::Objective;

 use std::collections::HashMap as M;

 use std::path::PathBuf;

 use std::string::String as S;

 use std::error::Error as E;

 use std::boxed::Box as B;

 type R<X> = std::result::Result<X,B<dyn E>>;

 pub trait Configure: Objective {

   fn update(&self) -> R<()> {

     Ok(())

   }

 }

 #[derive(Serialize, Deserialize, Debug, Default)]

 pub struct ShellConfig {

   pub env: M<S,S>,

   pub cmds: M<S,S>,

   pub shell: ShellType,

 }

 impl Objective for ShellConfig {}

 #[derive(Serialize, Deserialize, Debug, Hash, Default)]

 pub enum ShellType {

   #[default]

   Bash,

   Zsh,

   Sh,

 }

 #[derive(Serialize, Deserialize, Debug, Default)]

 pub enum EditorType {

   #[default]

   Emacs,

   Vi,

   Nano,

 }

 #[derive(Serialize, Deserialize, Debug, Default)]

 pub struct EditorConfig {

   pub editor: EditorType,

   pub cmds: M<S,S>,

   pub init_file: PathBuf,

 }

 #[cfg(test)]

 mod tests;