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authorNicholas Nethercote <n.nethercote@gmail.com>2023-11-21 16:35:26 +1100
committerNicholas Nethercote <n.nethercote@gmail.com>2023-11-22 18:37:14 +1100
commit3ef9d4d0ed608b0493d66ffe8af2755529ce474c (patch)
treeebebccdf93d6d9e71f3b352f1f519fd38aa04077 /compiler/rustc_ast/src/node_id.rs
parentcc4bb0de204516c2852f70df0f3849e542e2c95e (diff)
downloadrust-3ef9d4d0ed608b0493d66ffe8af2755529ce474c.tar.gz
rust-3ef9d4d0ed608b0493d66ffe8af2755529ce474c.zip
Replace `custom_encodable` with `encodable`.
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.
Diffstat (limited to 'compiler/rustc_ast/src/node_id.rs')
-rw-r--r--compiler/rustc_ast/src/node_id.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_ast/src/node_id.rs b/compiler/rustc_ast/src/node_id.rs
index d16741757d1..48081582fc3 100644
--- a/compiler/rustc_ast/src/node_id.rs
+++ b/compiler/rustc_ast/src/node_id.rs
@@ -8,6 +8,7 @@ rustc_index::newtype_index! {
     /// This is later turned into [`DefId`] and `HirId` for the HIR.
     ///
     /// [`DefId`]: rustc_span::def_id::DefId
+    #[encodable]
     #[debug_format = "NodeId({})"]
     pub struct NodeId {
         /// The [`NodeId`] used to represent the root of the crate.