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Use try syntax for Option where appropriate

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This commit is contained in:
Matt Brubeck 2017-10-20 08:25:35 -07:00
parent fe16c1d5c3
commit 2d45e9d2da
19 changed files with 65 additions and 180 deletions
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17
components/net/hosts.rs
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@ -16,22 +16,13 @@ lazy_static! {
}
fn create_host_table() -> Option<HashMap<String, IpAddr>> {
// TODO: handle bad file path
let path = match env::var("HOST_FILE") {
Ok(host_file_path) => host_file_path,
Err(_) => return None,
};
let path = env::var_os("HOST_FILE")?;
let mut file = match File::open(&path) {
Ok(f) => BufReader::new(f),
Err(_) => return None,
};
let file = File::open(&path).ok()?;
let mut reader = BufReader::new(file);
let mut lines = String::new();
match file.read_to_string(&mut lines) {
Ok(_) => (),
Err(_) => return None,
};
reader.read_to_string(&mut lines).ok()?;
Some(parse_hostsfile(&lines))
}