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Merge pull request #1228 from serde-rs/untagged

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Reduce instantiations of Result::map in Deserialize of unit variants
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David Tolnay 2018-04-21 13:46:36 -07:00 committed by GitHub
commit b07a208716
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1 changed files with 7 additions and 6 deletions
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13
serde_derive/src/de.rs
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@ -1626,12 +1626,13 @@ fn deserialize_untagged_variant(
let type_name = params.type_name();
let variant_name = variant.ident.as_ref();
quote_expr! {
_serde::export::Result::map(
_serde::Deserializer::deserialize_any(
#deserializer,
_serde::private::de::UntaggedUnitVisitor::new(#type_name, #variant_name)
),
|()| #this::#variant_ident)
match _serde::Deserializer::deserialize_any(
#deserializer,
_serde::private::de::UntaggedUnitVisitor::new(#type_name, #variant_name)
) {
_serde::export::Ok(()) => _serde::export::Ok(#this::#variant_ident),
_serde::export::Err(__err) => _serde::export::Err(__err),
}
}
}
Style::Newtype => deserialize_untagged_newtype_variant(