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Change README chrono version links to just 0.4 

docs.rs redirects to the latest version in that range.
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Brandon W Maister 2019-06-21 17:14:19 -04:00
parent 579679b9c3
commit 403af6b298
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README.md
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@ -93,7 +93,7 @@ methods.
### Date and Time
Chrono provides a
[**`DateTime`**](https://docs.rs/chrono/0.4.6/chrono/struct.DateTime.html)
[**`DateTime`**](https://docs.rs/chrono/0.4/chrono/struct.DateTime.html)
type to represent a date and a time in a timezone.
For more abstract moment-in-time tracking such as internal timekeeping
@ -104,15 +104,15 @@ which tracks your system clock, or
is an opaque but monotonically-increasing representation of a moment in time.
`DateTime` is timezone-aware and must be constructed from
the [**`TimeZone`**](https://docs.rs/chrono/0.4.6/chrono/offset/trait.TimeZone.html) object,
the [**`TimeZone`**](https://docs.rs/chrono/0.4/chrono/offset/trait.TimeZone.html) object,
which defines how the local date is converted to and back from the UTC date.
There are three well-known `TimeZone` implementations:
* [**`Utc`**](https://docs.rs/chrono/0.4.6/chrono/offset/struct.Utc.html) specifies the UTC time zone. It is most efficient.
* [**`Utc`**](https://docs.rs/chrono/0.4/chrono/offset/struct.Utc.html) specifies the UTC time zone. It is most efficient.
* [**`Local`**](https://docs.rs/chrono/0.4.6/chrono/offset/struct.Local.html) specifies the system local time zone.
* [**`Local`**](https://docs.rs/chrono/0.4/chrono/offset/struct.Local.html) specifies the system local time zone.
* [**`FixedOffset`**](https://docs.rs/chrono/0.4.6/chrono/offset/struct.FixedOffset.html) specifies
* [**`FixedOffset`**](https://docs.rs/chrono/0.4/chrono/offset/struct.FixedOffset.html) specifies
an arbitrary, fixed time zone such as UTC+09:00 or UTC-10:30.
This often results from the parsed textual date and time.
Since it stores the most information and does not depend on the system environment,
@ -120,12 +120,12 @@ There are three well-known `TimeZone` implementations:
`DateTime`s with different `TimeZone` types are distinct and do not mix,
but can be converted to each other using
the [`DateTime::with_timezone`](https://docs.rs/chrono/0.4.6/chrono/struct.DateTime.html#method.with_timezone) method.
the [`DateTime::with_timezone`](https://docs.rs/chrono/0.4/chrono/struct.DateTime.html#method.with_timezone) method.
You can get the current date and time in the UTC time zone
([`Utc::now()`](https://docs.rs/chrono/0.4.6/chrono/offset/struct.Utc.html#method.now))
([`Utc::now()`](https://docs.rs/chrono/0.4/chrono/offset/struct.Utc.html#method.now))
or in the local time zone
([`Local::now()`](https://docs.rs/chrono/0.4.6/chrono/offset/struct.Local.html#method.now)).
([`Local::now()`](https://docs.rs/chrono/0.4/chrono/offset/struct.Local.html#method.now)).
```rust
use chrono::prelude::*;
@ -166,8 +166,8 @@ assert_eq!(dt, fixed_dt);
```
Various properties are available to the date and time, and can be altered individually.
Most of them are defined in the traits [`Datelike`](https://docs.rs/chrono/0.4.6/chrono/trait.Datelike.html) and
[`Timelike`](https://docs.rs/chrono/0.4.6/chrono/trait.Timelike.html) which you should `use` before.
Most of them are defined in the traits [`Datelike`](https://docs.rs/chrono/0.4/chrono/trait.Datelike.html) and
[`Timelike`](https://docs.rs/chrono/0.4/chrono/trait.Timelike.html) which you should `use` before.
Addition and subtraction is also supported.
The following illustrates most supported operations to the date and time:
@ -212,15 +212,15 @@ assert_eq!(Utc.ymd(1970, 1, 1).and_hms(0, 0, 0) - Duration::seconds(1_000_000_00
### Formatting and Parsing
Formatting is done via the [`format`](https://docs.rs/chrono/0.4.6/chrono/struct.DateTime.html#method.format) method,
Formatting is done via the [`format`](https://docs.rs/chrono/0.4/chrono/struct.DateTime.html#method.format) method,
which format is equivalent to the familiar `strftime` format.
See [`format::strftime`](https://docs.rs/chrono/0.4.6/chrono/format/strftime/index.html#specifiers)
See [`format::strftime`](https://docs.rs/chrono/0.4/chrono/format/strftime/index.html#specifiers)
documentation for full syntax and list of specifiers.
The default `to_string` method and `{:?}` specifier also give a reasonable representation.
Chrono also provides [`to_rfc2822`](https://docs.rs/chrono/0.4.6/chrono/struct.DateTime.html#method.to_rfc2822) and
[`to_rfc3339`](https://docs.rs/chrono/0.4.6/chrono/struct.DateTime.html#method.to_rfc3339) methods
Chrono also provides [`to_rfc2822`](https://docs.rs/chrono/0.4/chrono/struct.DateTime.html#method.to_rfc2822) and
[`to_rfc3339`](https://docs.rs/chrono/0.4/chrono/struct.DateTime.html#method.to_rfc3339) methods
for well-known formats.
```rust
@ -250,23 +250,23 @@ Parsing can be done with three methods:
([`std::fmt::Debug`](https://doc.rust-lang.org/std/fmt/trait.Debug.html))
format specifier prints, and requires the offset to be present.
2. [`DateTime::parse_from_str`](https://docs.rs/chrono/0.4.6/chrono/struct.DateTime.html#method.parse_from_str) parses
2. [`DateTime::parse_from_str`](https://docs.rs/chrono/0.4/chrono/struct.DateTime.html#method.parse_from_str) parses
a date and time with offsets and returns `DateTime<FixedOffset>`.
This should be used when the offset is a part of input and the caller cannot guess that.
It *cannot* be used when the offset can be missing.
[`DateTime::parse_from_rfc2822`](https://docs.rs/chrono/0.4.6/chrono/struct.DateTime.html#method.parse_from_rfc2822)
[`DateTime::parse_from_rfc2822`](https://docs.rs/chrono/0.4/chrono/struct.DateTime.html#method.parse_from_rfc2822)
and
[`DateTime::parse_from_rfc3339`](https://docs.rs/chrono/0.4.6/chrono/struct.DateTime.html#method.parse_from_rfc3339)
[`DateTime::parse_from_rfc3339`](https://docs.rs/chrono/0.4/chrono/struct.DateTime.html#method.parse_from_rfc3339)
are similar but for well-known formats.
3. [`Offset::datetime_from_str`](https://docs.rs/chrono/0.4.6/chrono/offset/trait.TimeZone.html#method.datetime_from_str) is
3. [`Offset::datetime_from_str`](https://docs.rs/chrono/0.4/chrono/offset/trait.TimeZone.html#method.datetime_from_str) is
similar but returns `DateTime` of given offset.
When the explicit offset is missing from the input, it simply uses given offset.
It issues an error when the input contains an explicit offset different
from the current offset.
More detailed control over the parsing process is available via
[`format`](https://docs.rs/chrono/0.4.6/chrono/format/index.html) module.
[`format`](https://docs.rs/chrono/0.4/chrono/format/index.html) module.
```rust
use chrono::prelude::*;
@ -298,18 +298,18 @@ assert!(Utc.datetime_from_str("Fri Nov 28 12:00:09", "%a %b %e %T").is_err());
assert!(Utc.datetime_from_str("Sat Nov 28 12:00:09 2014", "%a %b %e %T %Y").is_err());
```
Again : See [`format::strftime`](https://docs.rs/chrono/0.4.6/chrono/format/strftime/index.html#specifiers)
Again : See [`format::strftime`](https://docs.rs/chrono/0.4/chrono/format/strftime/index.html#specifiers)
documentation for full syntax and list of specifiers.
### Conversion from and to EPOCH timestamps
Use [`Utc.timestamp(seconds, nanoseconds)`](https://docs.rs/chrono/0.4.6/chrono/offset/trait.TimeZone.html#method.timestamp)
to construct a [`DateTime<Utc>`](https://docs.rs/chrono/0.4.6/chrono/struct.DateTime.html) from a UNIX timestamp
Use [`Utc.timestamp(seconds, nanoseconds)`](https://docs.rs/chrono/0.4/chrono/offset/trait.TimeZone.html#method.timestamp)
to construct a [`DateTime<Utc>`](https://docs.rs/chrono/0.4/chrono/struct.DateTime.html) from a UNIX timestamp
(seconds, nanoseconds that passed since January 1st 1970).
Use [`DateTime.timestamp`](https://docs.rs/chrono/0.4.6/chrono/struct.DateTime.html#method.timestamp) to get the timestamp (in seconds)
from a [`DateTime`](https://docs.rs/chrono/0.4.6/chrono/struct.DateTime.html). Additionally, you can use
[`DateTime.timestamp_subsec_nanos`](https://docs.rs/chrono/0.4.6/chrono/struct.DateTime.html#method.timestamp_subsec_nanos)
Use [`DateTime.timestamp`](https://docs.rs/chrono/0.4/chrono/struct.DateTime.html#method.timestamp) to get the timestamp (in seconds)
from a [`DateTime`](https://docs.rs/chrono/0.4/chrono/struct.DateTime.html). Additionally, you can use
[`DateTime.timestamp_subsec_nanos`](https://docs.rs/chrono/0.4/chrono/struct.DateTime.html#method.timestamp_subsec_nanos)
to get the number of additional number of nanoseconds.
```rust
@ -327,7 +327,7 @@ assert_eq!(dt.timestamp(), 1_500_000_000);
### Individual date
Chrono also provides an individual date type ([**`Date`**](https://docs.rs/chrono/0.4.6/chrono/struct.Date.html)).
Chrono also provides an individual date type ([**`Date`**](https://docs.rs/chrono/0.4/chrono/struct.Date.html)).
It also has time zones attached, and have to be constructed via time zones.
Most operations available to `DateTime` are also available to `Date` whenever appropriate.
@ -346,26 +346,26 @@ assert_eq!(Utc.ymd(2014, 11, 28).and_hms_milli(7, 8, 9, 10).format("%H%M%S").to_
There is no timezone-aware `Time` due to the lack of usefulness and also the complexity.
`DateTime` has [`date`](https://docs.rs/chrono/0.4.6/chrono/struct.DateTime.html#method.date) method
`DateTime` has [`date`](https://docs.rs/chrono/0.4/chrono/struct.DateTime.html#method.date) method
which returns a `Date` which represents its date component.
There is also a [`time`](https://docs.rs/chrono/0.4.6/chrono/struct.DateTime.html#method.time) method,
There is also a [`time`](https://docs.rs/chrono/0.4/chrono/struct.DateTime.html#method.time) method,
which simply returns a naive local time described below.
### Naive date and time
Chrono provides naive counterparts to `Date`, (non-existent) `Time` and `DateTime`
as [**`NaiveDate`**](https://docs.rs/chrono/0.4.6/chrono/naive/struct.NaiveDate.html),
[**`NaiveTime`**](https://docs.rs/chrono/0.4.6/chrono/naive/struct.NaiveTime.html) and
[**`NaiveDateTime`**](https://docs.rs/chrono/0.4.6/chrono/naive/struct.NaiveDateTime.html) respectively.
as [**`NaiveDate`**](https://docs.rs/chrono/0.4/chrono/naive/struct.NaiveDate.html),
[**`NaiveTime`**](https://docs.rs/chrono/0.4/chrono/naive/struct.NaiveTime.html) and
[**`NaiveDateTime`**](https://docs.rs/chrono/0.4/chrono/naive/struct.NaiveDateTime.html) respectively.
They have almost equivalent interfaces as their timezone-aware twins,
but are not associated to time zones obviously and can be quite low-level.
They are mostly useful for building blocks for higher-level types.
Timezone-aware `DateTime` and `Date` types have two methods returning naive versions:
[`naive_local`](https://docs.rs/chrono/0.4.6/chrono/struct.DateTime.html#method.naive_local) returns
[`naive_local`](https://docs.rs/chrono/0.4/chrono/struct.DateTime.html#method.naive_local) returns
a view to the naive local time,
and [`naive_utc`](https://docs.rs/chrono/0.4.6/chrono/struct.DateTime.html#method.naive_utc) returns
and [`naive_utc`](https://docs.rs/chrono/0.4/chrono/struct.DateTime.html#method.naive_utc) returns
a view to the naive UTC time.
## Limitations
@ -377,7 +377,7 @@ Date types are limited in about +/- 262,000 years from the common epoch.
Time types are limited in the nanosecond accuracy.
[Leap seconds are supported in the representation but
Chrono doesn't try to make use of them](https://docs.rs/chrono/0.4.6/chrono/naive/struct.NaiveTime.html#leap-second-handling).
Chrono doesn't try to make use of them](https://docs.rs/chrono/0.4/chrono/naive/struct.NaiveTime.html#leap-second-handling).
(The main reason is that leap seconds are not really predictable.)
Almost *every* operation over the possible leap seconds will ignore them.
Consider using `NaiveDateTime` with the implicit TAI (International Atomic Time) scale

2
ci/fix-readme.sh
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@ -1,6 +1,6 @@
#!/bin/bash
VERSION="$( cargo read-manifest | python -c 'import json, sys; print(json.load(sys.stdin)["version"])')"
VERSION="$( cargo read-manifest | python -c 'import json, sys; print(json.load(sys.stdin)["version"][:3])')"
LIB="$1"
# Make the Chrono in the header a link to the docs