| // run-pass | |
| #![allow(unused_variables)] | |
| use std::ops::Deref; | |
| fn main() { | |
| if env_var("FOOBAR").as_ref().map(Deref::deref).ok() == Some("yes") { | |
| panic!() | |
| } | |
| let env_home: Result<String, ()> = Ok("foo-bar-baz".to_string()); | |
| let env_home = env_home.as_ref().map(Deref::deref).ok(); | |
| if env_home == Some("") { panic!() } | |
| } | |
| #[inline(never)] | |
| fn env_var(s: &str) -> Result<String, VarError> { | |
| Err(VarError::NotPresent) | |
| } | |
| pub enum VarError { | |
| NotPresent, | |
| NotUnicode(String), | |
| } |