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Replace map(unwrap()) with fold()

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This commit is contained in:
Matthias Beyer 2016-08-03 11:29:38 +02:00
parent 80491ff0b7
commit 41bf063a71
1 changed files with 15 additions and 10 deletions
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25
libimagentrylink/src/internal.rs
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@ -114,17 +114,22 @@ fn links_into_values(links: Vec<StoreId>) -> Vec<Option<Value>> {
}
fn rewrite_links(header: &mut EntryHeader, links: Vec<StoreId>) -> Result<()> {
let links = links_into_values(links);
let links = try!(links_into_values(links)
.into_iter()
.fold(Ok(vec![]), |acc, elem| {
acc.and_then(move |mut v| {
match elem {
None => Err(LEK::InternalConversionError.into()),
Some(e) => {
v.push(e);
Ok(v)
},
}
})
}));
if links.iter().any(|o| o.is_none()) {
// if any type convert failed we fail as well
Err(LEK::InternalConversionError.into())
} else {
// I know it is ugly
let links = links.into_iter().map(|opt| opt.unwrap()).collect();
let process = header.set("imag.links", Value::Array(links));
process_rw_result(process).map(|_| ())
}
let process = header.set("imag.links", Value::Array(links));
process_rw_result(process).map(|_| ())
}
/// When Linking A -> B, the specification wants us to link back B -> A.