Hi Alex,
This is Issue #5121, I believe. That error message is certainly
confusing but basically it's a bug and known limitation. I hope to
lift it...soonish as part of the fix for finishing the work on
lifetime syntax (#4846).
Niko
On Fri, Sep 06, 2013 at 08:27:49PM +0100, Alex wrote:
> Hey Everyone,
>
> I'm new to rust but enjoying it a lot. I'm having trouble with the
> following code example:
>
>
> use std::hashmap::{HashMap, Map};
>
>
> fn do_something<'input, M: Map<int, &'input str>> (key: int, map: &M){
> match map.find(key){
> Some(result) => println(fmt!("%s", result)),
> None => println("no match")
> };
> }
>
> fn main(){
> let map : HashMap<int, &str> = HashMap::new();
> map.insert(1, "one");
> do_something(1, map);
> }
>
>
> This fails with a compilation error:
>
> example.rs:4:44: 4:47 error: Illegal lifetime 'input: only 'self is allowed
> as part of a type declaration
> example.rs:4 fn do_something<'input, M: Map<int, &'input str>> (key: int,
> map: &M){
>
>
> Now, I'm probably misunderstanding a bunch of things here, firstly all the
> example code I've seen out there uses the HashMap type directly rather than
> the Map trait, is this idiomatic? Secondly, I'm still getting my head
> around lifetimes and probably have this all muddled so any pointers there
> would be welcome.
>
> Thanks
> Alex Good
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