buffa-types: add jiff feature (Timestamp/Duration conversions)

.changes/unreleased/added-20260629-144131.yaml

@@ -0,0 +1,8 @@
+kind: Added
+body: |-
+    **`jiff` feature for `buffa-types`** (#264).
+    Adds conversions between the well-known types and [jiff](https://docs.rs/jiff):
+    `Timestamp` ↔ `jiff::Timestamp` and `Duration` ↔ `jiff::SignedDuration`. Gated
+    behind the new `jiff` Cargo feature and `no_std`-compatible (`jiff` is pulled
+    with `default-features = false` + `alloc`).
+time: 2026-06-29T14:41:31.006126085+08:00

Cargo.toml

@@ -69,6 +69,11 @@ bytes = { version = "1", default-features = false }
 # 0.4.31 fails to compile this crate's `chrono` feature, 0.4.34 succeeds.
 chrono = { version = "0.4.34", default-features = false }
 foldhash = { version = "0.1", default-features = false }
+# `jiff` interop for `Timestamp` / `Duration` (the `buffa-types` `jiff`
+# feature). Pulled with `default-features = false` + `alloc` so the conversions
+# stay `no_std`; `buffa-types`' `std` feature layers `jiff/std` on top. MSRV
+# 1.70 as of 0.2 — within buffa's pin.
+jiff = { version = "0.2", default-features = false, features = ["alloc"] }
 hashbrown = { version = "0.15", default-features = false, features = ["default-hasher"] }
 once_cell = { version = "1", default-features = false }
 rustversion = { version = "1" }

Taskfile.yml

@@ -749,6 +749,7 @@ tasks:
       - cargo check -p buffa --no-default-features --target thumbv7em-none-eabihf
       - cargo check -p buffa-types --no-default-features
       - cargo check -p buffa-types --no-default-features --features chrono
+      - cargo check -p buffa-types --no-default-features --features jiff
       - cargo check -p buffa-descriptor --no-default-features
   # ── Coverage ─────────────────────────────────────────────────────────
 

buffa-test/Cargo.toml

@@ -17,7 +17,7 @@ buffa = { workspace = true, features = ["std", "json", "text"] }
 # generated with `generate_text(true)` and the pool decodes the WKT
 # descriptors that need it.
 buffa-descriptor = { workspace = true, features = ["reflect", "json", "std"] }
-buffa-types = { workspace = true, features = ["json", "chrono"] }
+buffa-types = { workspace = true, features = ["json", "chrono", "jiff"] }
 # The SmolStr preset crate, used by the string_type fixtures and as the template
 # for the crate-local newtypes in `reprs`.
 buffa-smolstr = { workspace = true, features = ["serde"] }

buffa-types/Cargo.toml

@@ -15,7 +15,7 @@ rustdoc-args = ["--cfg", "docsrs"]
 
 [features]
 default = ["std"]
-std = ["buffa/std", "thiserror/std", "serde?/std", "serde_json?/std"]
+std = ["buffa/std", "thiserror/std", "serde?/std", "serde_json?/std", "jiff?/std"]
 json = ["dep:serde", "dep:serde_json", "buffa/json"]
 arbitrary = ["dep:arbitrary", "buffa/arbitrary"]
 # Runtime reflection for the WKT views (`impl ReflectMessage for TimestampView`,
@@ -26,6 +26,10 @@ reflect = ["dep:buffa-descriptor", "buffa-descriptor/reflect", "buffa-descriptor
 # Conversions between WKT `Timestamp` / `Duration` and `chrono::DateTime<Utc>` /
 # `chrono::TimeDelta`. `no_std`-compatible.
 chrono = ["dep:chrono"]
+# Conversions between WKT `Timestamp` / `Duration` and `jiff::Timestamp` /
+# `jiff::SignedDuration`. `no_std`-compatible (`jiff` is pulled with
+# `default-features = false` + `alloc`); the `std` feature adds `jiff/std`.
+jiff = ["dep:jiff"]
 
 [dependencies]
 arbitrary = { workspace = true, optional = true }
@@ -39,6 +43,7 @@ buffa-descriptor = { workspace = true, optional = true }
 # `::bytes::Bytes` paths, so the crate is referenced directly.
 bytes = { workspace = true }
 chrono = { workspace = true, optional = true }
+jiff = { workspace = true, optional = true }
 serde = { workspace = true, optional = true }
 serde_json = { workspace = true, optional = true }
 thiserror = { workspace = true }