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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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13
components/profile/mem.rs
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@ -515,16 +515,11 @@ mod system_reporter {
use std::fs::File;
use std::io::Read;
// Like std::macros::try!, but for Option<>.
macro_rules! option_try(
($e:expr) => (match $e { Some(e) => e, None => return None })
);
let mut f = option_try!(File::open("/proc/self/statm").ok());
let mut f = File::open("/proc/self/statm").ok()?;
let mut contents = String::new();
option_try!(f.read_to_string(&mut contents).ok());
let s = option_try!(contents.split_whitespace().nth(field));
let npages = option_try!(s.parse::<usize>().ok());
f.read_to_string(&mut contents).ok()?;
let s = contents.split_whitespace().nth(field)?;
let npages = s.parse::<usize>().ok()?;
Some(npages * page_size())
}