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serde_with_macros v1.4.0
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@github-actions github-actions released this 15 Feb 22:06
macros-v1.4.0
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Changed

  • Improve error messages when #[serde_as(..)] is misused as a field attribute.
    Thanks to @Lehona for reporting the bug in #233.

  • Internal cleanup for assembling and parsing attributes during serde_as processing.

  • Change processing on #[serde_as(...)] attributes on fields.

    The attributes will no longer be stripped during proc-macro processing.
    Instead, a private derive macro is applied to the struct/enum which captures them and makes them inert, thus allowing compilation.

    This should have no effect on the generated code and on the runtime behavior.
    It eases integration of third-party crates with serde_with, since they can now process the #[serde_as(...)] field attributes reliably.
    Before this was impossible for derive macros and lead to akward ordering constraints on the attribute macros.

    Thanks to @Lehona for reporting this problem and to @dtolnay for suggesting the dummy derive macro.

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