bjoernager/rust
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Replace custom_encodable with encodable.

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By default, `newtype_index!` types get a default `Encodable`/`Decodable`
impl. You can opt out of this with `custom_encodable`. Opting out is the
opposite to how Rust normally works with autogenerated (derived) impls.

This commit inverts the behaviour, replacing `custom_encodable` with
`encodable` which opts into the default `Encodable`/`Decodable` impl.
Only 23 of the 59 `newtype_index!` occurrences need `encodable`.

Even better, there were eight crates with a dependency on
`rustc_serialize` just from unused default `Encodable`/`Decodable`
impls. This commit removes that dependency from those eight crates.
This commit is contained in:
Nicholas Nethercote 2023-11-21 16:35:26 +11:00
parent cc4bb0de20
commit 3ef9d4d0ed
29 changed files with 27 additions and 28 deletions
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2
compiler/rustc_span/src/hygiene.rs
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@ -60,7 +60,6 @@ pub struct SyntaxContextData {
rustc_index::newtype_index! {
/// A unique ID associated with a macro invocation and expansion.
#[custom_encodable]
pub struct ExpnIndex {}
}
@ -80,7 +79,6 @@ impl fmt::Debug for ExpnId {
rustc_index::newtype_index! {
/// A unique ID associated with a macro invocation and expansion.
#[custom_encodable]
#[no_ord_impl]
#[debug_format = "expn{}"]
pub struct LocalExpnId {}