1 // Copyright 2016 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
14 if env_var("FOOBAR").as_ref().map(Deref::deref).ok() == Some("yes") {
18 let env_home: Result<String, ()> = Ok("foo-bar-baz".to_string());
19 let env_home = env_home.as_ref().map(Deref::deref).ok();
21 if env_home == Some("") { panic!() }
25 fn env_var(s: &str) -> Result<String, VarError> {
26 Err(VarError::NotPresent)