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Update the comment on simpler exhaustive matching in derive

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David Tolnay 2023-03-08 11:46:26 -08:00
parent e50b14afee
commit bb72fe2726
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1 changed files with 3 additions and 3 deletions
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serde_derive/src/de.rs
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@ -1256,7 +1256,7 @@ fn deserialize_externally_tagged_enum(
// This is an empty enum like `enum Impossible {}` or an enum in which // This is an empty enum like `enum Impossible {}` or an enum in which
// all variants have `#[serde(skip_deserializing)]`. // all variants have `#[serde(skip_deserializing)]`.
quote! { quote! {
// FIXME: Once we drop support for Rust 1.15: // FIXME: Once feature(exhaustive_patterns) is stable:
// let _serde::__private::Err(__err) = _serde::de::EnumAccess::variant::<__Field>(__data); // let _serde::__private::Err(__err) = _serde::de::EnumAccess::variant::<__Field>(__data);
// _serde::__private::Err(__err) // _serde::__private::Err(__err)
_serde::__private::Result::map( _serde::__private::Result::map(
@ -2536,7 +2536,7 @@ fn deserialize_map(
let all_skipped = fields.iter().all(|field| field.attrs.skip_deserializing()); let all_skipped = fields.iter().all(|field| field.attrs.skip_deserializing());
let match_keys = if cattrs.deny_unknown_fields() && all_skipped { let match_keys = if cattrs.deny_unknown_fields() && all_skipped {
quote! { quote! {
// FIXME: Once we drop support for Rust 1.15: // FIXME: Once feature(exhaustive_patterns) is stable:
// let _serde::__private::None::<__Field> = try!(_serde::de::MapAccess::next_key(&mut __map)); // let _serde::__private::None::<__Field> = try!(_serde::de::MapAccess::next_key(&mut __map));
_serde::__private::Option::map( _serde::__private::Option::map(
try!(_serde::de::MapAccess::next_key::<__Field>(&mut __map)), try!(_serde::de::MapAccess::next_key::<__Field>(&mut __map)),
@ -2769,7 +2769,7 @@ fn deserialize_map_in_place(
let match_keys = if cattrs.deny_unknown_fields() && all_skipped { let match_keys = if cattrs.deny_unknown_fields() && all_skipped {
quote! { quote! {
// FIXME: Once we drop support for Rust 1.15: // FIXME: Once feature(exhaustive_patterns) is stable:
// let _serde::__private::None::<__Field> = try!(_serde::de::MapAccess::next_key(&mut __map)); // let _serde::__private::None::<__Field> = try!(_serde::de::MapAccess::next_key(&mut __map));
_serde::__private::Option::map( _serde::__private::Option::map(
try!(_serde::de::MapAccess::next_key::<__Field>(&mut __map)), try!(_serde::de::MapAccess::next_key::<__Field>(&mut __map)),