This method is intended to elegantly subsume two common iteration functions.
The first is `iter::range`, which is used identically to the method introduced
in this commit, but currently works only on uints. The second is a common case
of `{int, i8, uint, etc.}::range`, in the case where the inductive variable is
ignored. Compare the usage of the three:
```
for iter::range(100u) {
// do whatever
}
for int::range(0, 100) |_i| {
// do whatever
}
for 100.times {
// do whatever
}
```
I feel that the latter reads much more nicely than the first two approaches,
and unlike the first two the new method allows the user to ignore the specific
type of the number (ineed, if we're throwing away the inductive variable, who
cares what type it is?). A minor benefit is that this new method will be
somewhat familiar to users of Ruby, from which we borrow the name "times".
Most could use the each method, but because of the hack used to
disambiguate old- and new-style loops, some had to use vec::each.
(This hack will go away soon.)
Issue #1619
We should probalby warn when defining a method foo on {foo: int} etc.
This should reduce the amount of useless typevars that are allocated.
Issue #1227
Move the name of the bundle to the front, allow type parameters (not
handled yet), and add a 'for' keyword:
impl utils for int {
fn str() -> str { int::str(self) }
fn times(f: block()) { ... }
}
