Previously Chrono was mainly tested in UTC (Travis) and UTC+9 (the
maintainer's local time zone), but we have frequently seen bugs that
only appear in time zones behind UTC. This commit makes the test run all
unit tests three times, in different time zones (UTC, UTC+9:30 and
UTC-4 for now---the choice is mostly arbitrary but tries to cover DST
and half-hour offsets for the future). Travis already ran them three
times (for rust-serialize and Serde) so this won't slow the CI down.
Closes#130.
So this is a much delayed major release, but this should not really
change how you use Chrono---only the "required" breakages have been
done (e.g. anything hindering API evolution). The "big" release used to
be 0.3, but due to the dependency changes we are forced to push that to
0.4. I've took this opportunity to push all known planned breaking
changes to 0.3, so this should be quite stable for a moment.
See `CHANGELOG.md` for the full list of changes, but most importantly:
- `chrono::prelude` module has been added for proper glob imports.
- `FixedOffset` is now the official "value" type for time zone offsets.
- Serde 0.9 support has landed, and serialization format used by
rustc-serialize and Serde has been now synchronized.
- Formatting items have been slightly adjusted to be future-proof.
Fixes#126.
The intention was to add newer methods using `std::time::Duration`
to the older names, but it will break the API compatibility anyway.
Better to completely remove them right now.
- Formatting item types are no longer `Copy`.
- `Numeric` and `Fixed` items now have `Internal` variants reserved
for the future expansion. It had been hard to expand the items
without totally breaking the backward compatibility (as per
the API evolution guideline of RFC 1105).
- `Item::Owned{Literal,Space}` for the owned variant of
`Item::{Literal,Space}` has been added.
Closes#76.
This may sound strange, but the final type for the offset "value" was
originally `time::Duration` (returned by `Offset::local_minus_utc`).
This caused a lot of problems becaus adding `Duration` fully interacts
with leap seconds and `Duration` itself is somewhat deprecated.
This commit entirely replaces this role of `Duration` with
`FixedOffset`. So if we had `Offset` and `Duration` to represent
the "storage" offset type and the offset "value" in the past,
we now have `Offset` and `FixedOffset`. Storage-to-value conversion is
called to "fix" the offset---an apt term for the type.
The list of actual changes:
- The time zone offset is now restricted to UTC-23:59:59 through
UTC+23:59:59, and no subsecond value is allowed. As described above,
`FixedOffset` is now fully used for this purpose.
- One can now add and subtract `FixedOffset` to/from timelike values.
Replaces a temporary `chrono::offset::add_with_leapsecond` function.
Datelike & non-timelike values are never affected by the offset.
- UTC and local views to `Date<Tz>` are now identical. We keep
relevant methods for the consistency right now.
- `chrono::format::format` now receives `FixedOffset` in place of
`(Old)Duration`.
- `Offset` now has a `fix` method to resolve, or to "fix" the
"storage" offset (`Offset`) to the offset "value" (`FixedOffset`).
- `FixedOffset::{local_minus_utc, utc_minus_local}` methods are added.
They no longer depend on `Duration` as well.
- Rustc-serialize now uses the same serialization format as Serde.
This also means that the older format (naturally derived from
the internals) is no longer supported.
- Serialization support only existed for rustc-serialize has been
(temporarily) removed. This affects `Date<Tz>` and all individual
time zone types. This does *not* affect `DateTime<Tz>` as it has
individual support per `Tz`.
Please note that this is considered a temporary solution to avoid
stabilizing diverging implementations. Their implementations will
likely be reintroduced later.
Due to the backward compatibility we won't be going to remove support
for `time::Duration` in 0.3, and the initial 0.3.0 release won't have
proper `std::time::Duration` support (haven't finalized the logics).
However we will reserve proper names and signatures for the upcoming
`std::time::Duration` support---the "older" duration type will be
referred as "signed" in the names.
- Added a `chrono::prelude` module. This does not have the (old)
`Duration` type reexported, so the documentation has now correctly
replaced all occurrences of `chrono::Duration`. The existing
`chrono::Duration` reexport itself remains for the compatibility.
- Avoided using a plain `Duration` type in the signature, to avoid
any ambiguity.
- Renamed `checked_{add,sub}` to `checked_{add,sub}_signed`.
- Subtraction operator between two instants has been removed and
replaced with `signed_duration_since`. This follows the naming
chosen by `std::time::SystemTime` etc., and the version for newer
`std::time::Duration` will be named to `duration_since`.
All CI accounts are now moved to the new organization (unfortunately
Appveyor does not automatically move the build history though).
Since it's a mess to redirect everything to chronotope.github.io,
I've taken this as an opportunity to switch to docs.rs---this seems
to be better than the manual management nowadays.
Updated other files as accordingly.
This provides examples for most of the constructor-like methods on
`TimeZone`, examples on the various `Offset` impls, and links
`NaiveDateTime` to `TimeZone` so that it's more obvious how you're
supposed to do things.
This is related to #88, which is something that I ran into when I
started using rust-chrono.
The ISO 8601 format includes both "nominal" (year, month, week, and
day) and "accurate" (hour, minute, and second) components. However, the
`Duration` type only represents an "accurate" duration because
arithmetic with nominal components is not defined in ISO 8601.
- `NaiveDateTime` is now almost completely annotated with examples.
- Introduced `NaiveTime::overflowing_{add,sub}` for the correct
handling of overflow/underflow of `NaiveTime`.
- `NaiveDateTime +/- Duration` operation is rewritten with those
methods, eliminating any problem against leap seconds. (Thus this
is yet another slight breaking change, but considered a bug fix.)
Kang Seonghoon
Eric Findlay
Ashley Mannix
Jonas mg
Alex Mikhalev
Richard Petrie
Brandon W Maister
Jim Turner
János Illés
David Tolnay