On 3/23/14 12:11 AM, Phil Dawes wrote:
On Sun, Mar 23, 2014 at 2:04 AM, Patrick Walton <pcwal...@mozilla.com
<mailto:pcwal...@mozilla.com>> wrote:
Why not change the signature of `search_crate` to take `~str`?
Patrick
Hi Patrick,
The main reason I haven't done this is that it is already used from a
bunch of places where a path is &[&str] as the result of an earlier
split_str("::")
e.g.
let path : ~[&str] = s.split_str("::").collect();
...
search_crate(path);
Ah, I see. Well, in that case you can make a trait (say, `String`),
which implements a method `.as_str()` that returns an `&str`, and have
that trait implemented by both `&str` and `~str`. (IIRC the standard
library may have such a trait already, for `Path`?)
You can then write:
fn search_crate<T:String>(x: &[T]) {
...
for string in x.iter() {
... string.as_str() ...
}
}
And the function will be callable with both `&str` and `~str`. Again, I
think the standard library has such a trait implemented already, for
this use case.
Patrick
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