mirror of
https://github.com/rust-lang/rust
synced 2024-11-05 20:45:15 +00:00
24 lines
510 B
Rust
24 lines
510 B
Rust
// run-pass
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#![allow(unused_variables)]
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use std::ops::Deref;
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fn main() {
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if env_var("FOOBAR").as_ref().map(Deref::deref).ok() == Some("yes") {
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panic!()
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}
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let env_home: Result<String, ()> = Ok("foo-bar-baz".to_string());
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let env_home = env_home.as_ref().map(Deref::deref).ok();
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if env_home == Some("") { panic!() }
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}
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#[inline(never)]
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fn env_var(s: &str) -> Result<String, VarError> {
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Err(VarError::NotPresent)
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}
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pub enum VarError {
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NotPresent,
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NotUnicode(String),
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}
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