[PATCH v2 0/5] rust: add `TryFrom` and `Into` derive macros

[Jesung Yang]

This patch series introduces derive macros for `TryFrom` and `Into`
traits.

A few enhancements were made to the custom `quote!()` macro to write
the derive macro. These include support for additional punctuation
tokens and a fix for an unused variable warning when quoting simple
forms. Detailed information about these enhancements is provided in the
relevant patches.

This series builds on the previous work [1], where the `FromPrimitive`
trait was considered too heavy for the current use cases. In response
to the emerging need for functionality similar to `ToPrimitive`, this
series also implements the `Into` derive macro.

The original discussion can be found on Zulip [2].

[1] https://lore.kernel.org/rust-for-linux/cover.1750689857.git.y.j3ms.n@xxxxxxxxx/
[2] https://rust-for-linux.zulipchat.com/#narrow/channel/288089/topic/x/near/524335626

Changes in v2 (no functional changes):
  - Split the patch "rust: macros: extend custom `quote!()` macro"
    into two separate patches.
  - Remove unnecessary spaces between tags.
  - Use a consistent commit subject prefix: "rust: macros:".
  - Add Tested-by tags.


Jesung Yang (5):
  rust: macros: allow conversion from `&T` to `TokenStream`
  rust: macros: extend custom `quote!()` macro
  rust: macros: prefix variable `span` with underscore
  rust: macros: add derive macro for `TryFrom`
  rust: macros: add derive macro for `Into`

 rust/macros/convert.rs | 361 +++++++++++++++++++++++++++++++++++++++++
 rust/macros/lib.rs     | 239 +++++++++++++++++++++++++++
 rust/macros/quote.rs   |  40 ++++-
 3 files changed, 638 insertions(+), 2 deletions(-)
 create mode 100644 rust/macros/convert.rs


base-commit: dff64b072708ffef23c117fa1ee1ea59eb417807
-- 
2.39.5