Function envy::prefixed

pub fn prefixed<'a, C>(prefix: C) -> Prefixed<'a> where
    C: Into<Cow<'a, str>>, 

Produces a instance of Prefixed for prefixing env variable names

Example

use serde::Deserialize;

#[derive(Deserialize, Debug)]
struct Config {
  foo: u16,
  bar: bool,
  baz: String,
  boom: Option<u64>
}

fn main() {
   // all env variables will be expected to be prefixed with APP_
   // i.e. APP_FOO, APP_BAR, ect
   match envy::prefixed("APP_").from_env::<Config>() {
      Ok(config) => println!("{:#?}", config),
      Err(error) => panic!("{:#?}", error)
   }
}