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add #[allow(deprecated)] to derive implementations

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Allow deprecated in the `Serialize`/`Deserialize`
derive implementations. This allows you to
deprecate structs, enums, struct fields, or enum
variants and not get compiler warnings/errors
about use of deprecated thing. We only do this
if `#[deprecated]` or `#[allow(deprecated)]` exist
on the root object or the variants of the root
object (if it is an enum).

Resolves #2195
This commit is contained in:
Ryan Crisanti
2025-01-08 13:26:17 -05:00
parent da3998acfb
commit ae38b27aee
9 changed files with 164 additions and 0 deletions
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test_suite/tests/ui/deprecated/deprecated_ser_with.stderr
+11
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@@ -0,0 +1,11 @@
error: use of deprecated function `deprecated_with`
--> tests/ui/deprecated/deprecated_ser_with.rs:8:30
|
8 | #[serde(serialize_with = "deprecated_with")]
| ^^^^^^^^^^^^^^^^^
|
note: the lint level is defined here
--> tests/ui/deprecated/deprecated_ser_with.rs:1:9
|
1 | #![deny(deprecated)]
| ^^^^^^^^^^