made every type `Clone`able; added `and_*` constructors to `DateZ`.

it allows for, say, `DateZ::from_ymd(2014,1,2).and_hms(3,4,5)`.

src/date.rs

@@ -9,6 +9,8 @@
 use std::{fmt, num};
 use num::Integer;
 use duration::Duration;
+use time::TimeZ;
+use datetime::DateTimeZ;
 
 use self::internals::{DateImpl, Of, Mdf, YearFlags};
 
@@ -19,7 +21,7 @@ static MIN_YEAR: i32 = internals::MIN_YEAR as i32;
 ///
 /// The order of the days of week depends on the context.
 /// One should prefer `*_from_monday` or `*_from_sunday` methods to get the correct result.
-#[deriving(PartialEq, Eq, FromPrimitive, Show)]
+#[deriving(PartialEq, Eq, Clone, FromPrimitive, Show)]
 pub enum Weekday {
     /// Monday.
     Mon = 0,
@@ -96,7 +98,7 @@ impl Weekday {
 
     /// Returns a DOW number starting from Monday = 0.
     #[inline]
-    pub fn ndays_from_monday(&self) -> u32 {
+    pub fn num_days_from_monday(&self) -> u32 {
         match *self {
             Mon => 0,
             Tue => 1,
@@ -110,7 +112,7 @@ impl Weekday {
 
     /// Returns a DOW number starting from Sunday = 0.
     #[inline]
-    pub fn ndays_from_sunday(&self) -> u32 {
+    pub fn num_days_from_sunday(&self) -> u32 {
         match *self {
             Mon => 1,
             Tue => 2,
@@ -219,7 +221,7 @@ pub trait Datelike {
 /// ISO 8601 calendar date without timezone.
 /// Allows for every proleptic Gregorian date from Jan 1, 262145 BCE to Dec 31, 262143 CE.
 /// Also supports the conversion from ISO 8601 ordinal and week date.
-#[deriving(PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[deriving(PartialEq, Eq, PartialOrd, Ord, Clone, Hash)]
 pub struct DateZ {
     ymdf: DateImpl, // (year << 13) | of
 }
@@ -329,6 +331,84 @@ impl DateZ {
         }
     }
 
+    /// Makes a new `DateTimeZ` from the current date and given `TimeZ`.
+    #[inline]
+    pub fn and_time(&self, time: TimeZ) -> DateTimeZ {
+        DateTimeZ::new(self.clone(), time)
+    }
+
+    /// Makes a new `DateTimeZ` from the current date, hour, minute and second.
+    ///
+    /// Fails on invalid hour, minute and/or second.
+    #[inline]
+    pub fn and_hms(&self, hour: u32, min: u32, sec: u32) -> DateTimeZ {
+        self.and_hms_opt(hour, min, sec).expect("invalid time")
+    }
+
+    /// Makes a new `DateTimeZ` from the current date, hour, minute and second.
+    ///
+    /// Returns `None` on invalid hour, minute and/or second.
+    #[inline]
+    pub fn and_hms_opt(&self, hour: u32, min: u32, sec: u32) -> Option<DateTimeZ> {
+        TimeZ::from_hms_opt(hour, min, sec).map(|time| self.and_time(time))
+    }
+
+    /// Makes a new `DateTimeZ` from the current date, hour, minute, second and millisecond.
+    /// The millisecond part can exceed 1,000 in order to represent the leap second.
+    ///
+    /// Fails on invalid hour, minute, second and/or millisecond.
+    #[inline]
+    pub fn and_hms_milli(&self, hour: u32, min: u32, sec: u32, milli: u32) -> DateTimeZ {
+        self.and_hms_milli_opt(hour, min, sec, milli).expect("invalid time")
+    }
+
+    /// Makes a new `DateTimeZ` from the current date, hour, minute, second and millisecond.
+    /// The millisecond part can exceed 1,000 in order to represent the leap second.
+    ///
+    /// Returns `None` on invalid hour, minute, second and/or millisecond.
+    #[inline]
+    pub fn and_hms_milli_opt(&self, hour: u32, min: u32, sec: u32,
+                             milli: u32) -> Option<DateTimeZ> {
+        TimeZ::from_hms_milli_opt(hour, min, sec, milli).map(|time| self.and_time(time))
+    }
+
+    /// Makes a new `DateTimeZ` from the current date, hour, minute, second and microsecond.
+    /// The microsecond part can exceed 1,000,000 in order to represent the leap second.
+    ///
+    /// Fails on invalid hour, minute, second and/or microsecond.
+    #[inline]
+    pub fn and_hms_micro(&self, hour: u32, min: u32, sec: u32, micro: u32) -> DateTimeZ {
+        self.and_hms_micro_opt(hour, min, sec, micro).expect("invalid time")
+    }
+
+    /// Makes a new `DateTimeZ` from the current date, hour, minute, second and microsecond.
+    /// The microsecond part can exceed 1,000,000 in order to represent the leap second.
+    ///
+    /// Returns `None` on invalid hour, minute, second and/or microsecond.
+    #[inline]
+    pub fn and_hms_micro_opt(&self, hour: u32, min: u32, sec: u32,
+                             micro: u32) -> Option<DateTimeZ> {
+        TimeZ::from_hms_micro_opt(hour, min, sec, micro).map(|time| self.and_time(time))
+    }
+
+    /// Makes a new `DateTimeZ` from the current date, hour, minute, second and nanosecond.
+    /// The nanosecond part can exceed 1,000,000,000 in order to represent the leap second.
+    ///
+    /// Fails on invalid hour, minute, second and/or nanosecond.
+    #[inline]
+    pub fn and_hms_nano(&self, hour: u32, min: u32, sec: u32, nano: u32) -> DateTimeZ {
+        self.and_hms_nano_opt(hour, min, sec, nano).expect("invalid time")
+    }
+
+    /// Makes a new `DateTimeZ` from the current date, hour, minute, second and nanosecond.
+    /// The nanosecond part can exceed 1,000,000,000 in order to represent the leap second.
+    ///
+    /// Returns `None` on invalid hour, minute, second and/or nanosecond.
+    #[inline]
+    pub fn and_hms_nano_opt(&self, hour: u32, min: u32, sec: u32, nano: u32) -> Option<DateTimeZ> {
+        TimeZ::from_hms_nano_opt(hour, min, sec, nano).map(|time| self.and_time(time))
+    }
+
     /// Returns the packed month-day-flags.
     #[inline]
     fn mdf(&self) -> Mdf {

src/datetime.rs

@@ -11,8 +11,8 @@ use duration::Duration;
 use time::{Timelike, TimeZ};
 use date::{Datelike, DateZ, Weekday};
 
-/// ISO 8601 combined date and time.
+/// ISO 8601 combined date and time without timezone.
-#[deriving(PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[deriving(PartialEq, Eq, PartialOrd, Ord, Clone, Hash)]
 pub struct DateTimeZ {
     date: DateZ,
     time: TimeZ,
@@ -93,19 +93,19 @@ impl DateTimeZ {
         }
     }
 
-    /// Retrieves a `Date` component.
+    /// Retrieves a date component.
     #[inline]
     pub fn date(&self) -> DateZ {
         self.date
     }
 
-    /// Retrieves a `Time` component.
+    /// Retrieves a time component.
     #[inline]
     pub fn time(&self) -> TimeZ {
         self.time
     }
 
-    /// Returns the number of non-leap seconds since January 1, 1970 0:00:00.
+    /// Returns the number of non-leap seconds since January 1, 1970 0:00:00 UTC.
     /// Note that this does *not* account for the timezone!
     #[inline]
     pub fn num_seconds_from_unix_epoch(&self) -> i64 {
@@ -255,7 +255,7 @@ mod tests {
     }
 
     #[test]
-    fn test_datetime_nseconds_from_unix_epoch() {
+    fn test_datetime_num_seconds_from_unix_epoch() {
         let to_timestamp =
             |y,m,d,h,n,s| DateTimeZ::from_ymdhms(y,m,d,h,n,s).num_seconds_from_unix_epoch();
         assert_eq!(to_timestamp(1969, 12, 31, 23, 59, 59), -1);

src/duration.rs

@@ -25,7 +25,7 @@ macro_rules! try_opt(
 
 /// ISO 8601 time duration with nanosecond precision.
 /// This also allows for the negative duration; see individual methods for details.
-#[deriving(PartialEq, Eq, PartialOrd, Ord)]
+#[deriving(PartialEq, Eq, PartialOrd, Ord, Clone)]
 pub struct Duration {
     days: i32,
     secs: u32,

src/time.rs

@@ -64,7 +64,7 @@ pub trait Timelike {
 
 /// ISO 8601 time without timezone.
 /// Allows for the nanosecond precision and optional leap second representation.
-#[deriving(PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[deriving(PartialEq, Eq, PartialOrd, Ord, Clone, Hash)]
 pub struct TimeZ {
     secs: u32,
     frac: u32,