add optional rkyv support

CHANGELOG.md

@@ -19,6 +19,7 @@ Versions with only mechanical changes will be omitted from the following list.
 * Implement `DurationRound` for `NaiveDateTime`
 * Add `DateTime::from_local()` to construct from given local date and time (#572)
 * Correct build for wasm32-unknown-emscripten target (#568)
+* Add optional rkyv support.
 
 ## 0.4.19
 
@@ -291,21 +292,21 @@ release due to the compatibility concern raised.
 
   The full list of changes is as follows:
 
-  Before                                   | After
-  ---------------------------------------- | ----------------------------
-  `chrono::date::Date`                     | `chrono::Date`
-  `chrono::date::MIN`                      | `chrono::MIN_DATE`
-  `chrono::date::MAX`                      | `chrono::MAX_DATE`
-  `chrono::datetime::DateTime`             | `chrono::DateTime`
-  `chrono::naive::time::NaiveTime`         | `chrono::naive::NaiveTime`
-  `chrono::naive::date::NaiveDate`         | `chrono::naive::NaiveDate`
-  `chrono::naive::date::MIN`               | `chrono::naive::MIN_DATE`
-  `chrono::naive::date::MAX`               | `chrono::naive::MAX_DATE`
-  `chrono::naive::datetime::NaiveDateTime` | `chrono::naive::NaiveDateTime`
-  `chrono::offset::utc::UTC`               | `chrono::offset::Utc`
-  `chrono::offset::fixed::FixedOffset`     | `chrono::offset::FixedOffset`
-  `chrono::offset::local::Local`           | `chrono::offset::Local`
-  `chrono::format::parsed::Parsed`         | `chrono::format::Parsed`
+  | Before                                   | After                          |
+  | ---------------------------------------- | ------------------------------ |
+  | `chrono::date::Date`                     | `chrono::Date`                 |
+  | `chrono::date::MIN`                      | `chrono::MIN_DATE`             |
+  | `chrono::date::MAX`                      | `chrono::MAX_DATE`             |
+  | `chrono::datetime::DateTime`             | `chrono::DateTime`             |
+  | `chrono::naive::time::NaiveTime`         | `chrono::naive::NaiveTime`     |
+  | `chrono::naive::date::NaiveDate`         | `chrono::naive::NaiveDate`     |
+  | `chrono::naive::date::MIN`               | `chrono::naive::MIN_DATE`      |
+  | `chrono::naive::date::MAX`               | `chrono::naive::MAX_DATE`      |
+  | `chrono::naive::datetime::NaiveDateTime` | `chrono::naive::NaiveDateTime` |
+  | `chrono::offset::utc::UTC`               | `chrono::offset::Utc`          |
+  | `chrono::offset::fixed::FixedOffset`     | `chrono::offset::FixedOffset`  |
+  | `chrono::offset::local::Local`           | `chrono::offset::Local`        |
+  | `chrono::format::parsed::Parsed`         | `chrono::format::Parsed`       |
 
   With an exception of `Utc`, this change does not affect any direct usage of
   `chrono::*` or `chrono::prelude::*` types.

Cargo.toml

@@ -1,62 +1,63 @@
 [package]
-name = "chrono"
-version = "0.4.19"
 authors = [
-    "Kang Seonghoon <public+rust@mearie.org>",
-    "Brandon W Maister <quodlibetor@gmail.com>",
+  "Kang Seonghoon <public+rust@mearie.org>",
+  "Brandon W Maister <quodlibetor@gmail.com>",
 ]
+name = "chrono"
+version = "0.4.19"
 
+categories = ["date-and-time"]
 description = "Date and time library for Rust"
-homepage = "https://github.com/chronotope/chrono"
 documentation = "https://docs.rs/chrono/"
-repository = "https://github.com/chronotope/chrono"
+edition = "2015"
+exclude = ["/ci/*", "/.travis.yml", "/appveyor.yml", "/Makefile"]
+homepage = "https://github.com/chronotope/chrono"
 keywords = ["date", "time", "calendar"]
-categories = ["date-and-time"]
-readme = "README.md"
 license = "MIT/Apache-2.0"
-exclude = ["/ci/*", "/.travis.yml", "/appveyor.yml", "/Makefile"]
-
+readme = "README.md"
+repository = "https://github.com/chronotope/chrono"
 [badges]
-travis-ci = { repository = "chronotope/chrono" }
-appveyor = { repository = "chronotope/chrono" }
+appveyor = {repository = "chronotope/chrono"}
+travis-ci = {repository = "chronotope/chrono"}
 
 [lib]
 name = "chrono"
 
 [features]
-default = ["clock", "std", "oldtime"]
+__doctest = []
+__internal_bench = []
 alloc = []
-std = []
 clock = ["libc", "std", "winapi"]
+default = ["clock", "std", "oldtime"]
 oldtime = ["time"]
-wasmbind = ["wasm-bindgen", "js-sys"]
+std = []
 unstable-locales = ["pure-rust-locales", "alloc"]
-__internal_bench = []
-__doctest = []
+wasmbind = ["wasm-bindgen", "js-sys"]
 
 [dependencies]
-libc = { version = "0.2.69", optional = true }
-time = { version = "0.1.43", optional = true }
-num-integer = { version = "0.1.36", default-features = false }
-num-traits = { version = "0.2", default-features = false }
-rustc-serialize = { version = "0.3.20", optional = true }
-serde = { version = "1.0.99", default-features = false, optional = true }
-pure-rust-locales = { version = "0.5.2", optional = true }
+libc = {version = "0.2.69", optional = true}
+num-integer = {version = "0.1.36", default-features = false}
+num-traits = {version = "0.2", default-features = false}
+pure-rust-locales = {version = "0.5.2", optional = true}
+rkyv = {version = "0.7", optional = true}
+rustc-serialize = {version = "0.3.20", optional = true}
+serde = {version = "1.0.99", default-features = false, optional = true}
+time = {version = "0.1.43", optional = true}
 
 [target.'cfg(all(target_arch = "wasm32", not(any(target_os = "emscripten", target_os = "wasi"))))'.dependencies]
-wasm-bindgen = { version = "0.2", optional = true }
-js-sys = { version = "0.3", optional = true } # contains FFI bindings for the JS Date API
+js-sys = {version = "0.3", optional = true}# contains FFI bindings for the JS Date API
+wasm-bindgen = {version = "0.2", optional = true}
 
 [target.'cfg(windows)'.dependencies]
-winapi = { version = "0.3.0", features = ["std", "minwinbase", "minwindef", "timezoneapi"], optional = true }
+winapi = {version = "0.3.0", features = ["std", "minwinbase", "minwindef", "timezoneapi"], optional = true}
 
 [dev-dependencies]
-serde_json = { version = "1" }
-serde_derive = { version = "1", default-features = false }
-bincode = { version = "0.8.0" }
-num-iter = { version = "0.1.35", default-features = false }
-criterion = { version = "0.3" }
-doc-comment = { version = "0.3" }
+bincode = {version = "0.8.0"}
+criterion = {version = "0.3"}
+doc-comment = {version = "0.3"}
+num-iter = {version = "0.1.35", default-features = false}
+serde_derive = {version = "1", default-features = false}
+serde_json = {version = "1"}
 
 [target.'cfg(all(target_arch = "wasm32", not(any(target_os = "emscripten", target_os = "wasi"))))'.dev-dependencies]
 wasm-bindgen-test = "0.3"
@@ -68,11 +69,11 @@ features = ["serde"]
 features = ["serde"]
 
 [[bench]]
+harness = false
 name = "chrono"
 required-features = ["__internal_bench"]
-harness = false
 
 [[bench]]
-name = "serde"
 harness = false
+name = "serde"
 required-features = ["serde"]

src/datetime.rs

@@ -27,6 +27,8 @@ use naive::{self, IsoWeek, NaiveDate, NaiveDateTime, NaiveTime};
 #[cfg(feature = "clock")]
 use offset::Local;
 use offset::{FixedOffset, Offset, TimeZone, Utc};
+#[cfg(feature = "rkyv")]
+use rkyv::{Archive, Deserialize, Serialize};
 use Date;
 use {Datelike, Timelike, Weekday};
 
@@ -67,6 +69,7 @@ pub enum SecondsFormat {
 /// the general-purpose constructors are all via the methods on the
 /// [`TimeZone`](./offset/trait.TimeZone.html) implementations.
 #[derive(Clone)]
+#[cfg_attr(feature = "rkyv", derive(Archive, Deserialize, Serialize))]
 pub struct DateTime<Tz: TimeZone> {
     datetime: NaiveDateTime,
     offset: Tz::Offset,

src/lib.rs

@@ -491,6 +491,9 @@ extern crate test;
 #[cfg(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind"))]
 extern crate wasm_bindgen;
 
+#[cfg(feature = "rkyv")]
+extern crate rkyv;
+
 #[cfg(feature = "__doctest")]
 #[cfg_attr(feature = "__doctest", cfg(doctest))]
 doctest!("../README.md");

src/naive/date.rs

@@ -16,6 +16,8 @@ use format::DelayedFormat;
 use format::{parse, ParseError, ParseResult, Parsed, StrftimeItems};
 use format::{Item, Numeric, Pad};
 use naive::{IsoWeek, NaiveDateTime, NaiveTime};
+#[cfg(feature = "rkyv")]
+use rkyv::{Archive, Deserialize, Serialize};
 use {Datelike, Weekday};
 
 use super::internals::{self, DateImpl, Mdf, Of, YearFlags};
@@ -96,6 +98,7 @@ const MAX_BITS: usize = 44;
 ///
 /// This is currently the internal format of Chrono's date types.
 #[derive(PartialEq, Eq, Hash, PartialOrd, Ord, Copy, Clone)]
+#[cfg_attr(feature = "rkyv", derive(Archive, Deserialize, Serialize))]
 pub struct NaiveDate {
     ymdf: DateImpl, // (year << 13) | of
 }

src/naive/datetime.rs

@@ -18,6 +18,8 @@ use format::{Fixed, Item, Numeric, Pad};
 use naive::date::{MAX_DATE, MIN_DATE};
 use naive::time::{MAX_TIME, MIN_TIME};
 use naive::{IsoWeek, NaiveDate, NaiveTime};
+#[cfg(feature = "rkyv")]
+use rkyv::{Archive, Deserialize, Serialize};
 use {Datelike, Timelike, Weekday};
 
 /// The tight upper bound guarantees that a duration with `|Duration| >= 2^MAX_SECS_BITS`
@@ -59,6 +61,7 @@ pub const MAX_DATETIME: NaiveDateTime = NaiveDateTime { date: MAX_DATE, time: MA
 /// assert_eq!(dt.num_seconds_from_midnight(), 33011);
 /// ```
 #[derive(PartialEq, Eq, PartialOrd, Ord, Copy, Clone)]
+#[cfg_attr(feature = "rkyv", derive(Archive, Deserialize, Serialize))]
 pub struct NaiveDateTime {
     date: NaiveDate,
     time: NaiveTime,

src/naive/time.rs

@@ -14,6 +14,8 @@ use div::div_mod_floor;
 use format::DelayedFormat;
 use format::{parse, ParseError, ParseResult, Parsed, StrftimeItems};
 use format::{Fixed, Item, Numeric, Pad};
+#[cfg(feature = "rkyv")]
+use rkyv::{Archive, Deserialize, Serialize};
 use Timelike;
 
 pub const MIN_TIME: NaiveTime = NaiveTime { secs: 0, frac: 0 };
@@ -179,6 +181,7 @@ pub const MAX_TIME: NaiveTime = NaiveTime { secs: 23 * 3600 + 59 * 60 + 59, frac
 /// Since Chrono alone cannot determine any existence of leap seconds,
 /// **there is absolutely no guarantee that the leap second read has actually happened**.
 #[derive(PartialEq, Eq, PartialOrd, Ord, Copy, Clone)]
+#[cfg_attr(feature = "rkyv", derive(Archive, Deserialize, Serialize))]
 pub struct NaiveTime {
     secs: u32,
     frac: u32,

src/offset/fixed.rs

@@ -10,6 +10,8 @@ use oldtime::Duration as OldDuration;
 use super::{LocalResult, Offset, TimeZone};
 use div::div_mod_floor;
 use naive::{NaiveDate, NaiveDateTime, NaiveTime};
+#[cfg(feature = "rkyv")]
+use rkyv::{Archive, Deserialize, Serialize};
 use DateTime;
 use Timelike;
 
@@ -20,6 +22,7 @@ use Timelike;
 /// `DateTime<FixedOffset>` instances. See the [`east`](#method.east) and
 /// [`west`](#method.west) methods for examples.
 #[derive(PartialEq, Eq, Hash, Copy, Clone)]
+#[cfg_attr(feature = "rkyv", derive(Archive, Deserialize, Serialize))]
 pub struct FixedOffset {
     local_minus_utc: i32,
 }

src/offset/utc.rs

@@ -7,6 +7,8 @@ use core::fmt;
 
 use super::{FixedOffset, LocalResult, Offset, TimeZone};
 use naive::{NaiveDate, NaiveDateTime};
+#[cfg(feature = "rkyv")]
+use rkyv::{Archive, Deserialize, Serialize};
 #[cfg(all(
     feature = "clock",
     not(all(target_arch = "wasm32", not(target_os = "wasi"), feature = "wasmbind"))
@@ -33,6 +35,7 @@ use {Date, DateTime};
 /// assert_eq!(Utc.ymd(1970, 1, 1).and_hms(0, 1, 1), dt);
 /// ```
 #[derive(Copy, Clone, PartialEq, Eq)]
+#[cfg_attr(feature = "rkyv", derive(Archive, Deserialize, Serialize))]
 pub struct Utc;
 
 #[cfg(feature = "clock")]