On 1/24/13 10:51 AM, Peter Ronnquist wrote:
>**>* Hi,*>**>* I am trying to create a vector of pointers into another vector
>without*>* much luck. I would be happy if someone could tell me if this a good
>way*>* to use rust or if there is a better way to achieve a similar data*>*
>structure or if I am using the wrong language :-)*>**>* I have a vector of
>physical objects:*>**>**>* obj_vec = [ mut @obj1, @obj2, @obj3, ..., @objn
>]*>**>* I will iterate through those objects and see which ones are close
>to*>* each other and I want to store a pointer/reference to those objects in
>a*>* separate vector:*>**>**>* obj_close_vec = [ &obj2, &obj3 ]*>**>* The
>objects in obj_close_vec will be investigated further and might be*>* updated.*
Does something like this work?
let mut obj_vec = [ @mut obj1, @mut obj2, ... @mut objn ];
let mut obj_close_vec: ~[@mut ObjType] = ~[];
for obj_vec.each |&obj| {
if obj.is_interesting() {
obj_close_vec.push(obj);
}
}
for obj_close_vec.each |&obj| {
if i_want_to_mutate(obj) {
*obj = munge(obj);
}
}
Patrick
----------------------------------
I tried this:
struct Vec2 {
x: float,
y: float
}
fn main () {
let mut obj_vec = [@mut Vec2 {x: 0.3, y: 0.4}, @mut Vec2 {x: 0.1, y: 0.2} ];
let mut obj_close_vec: ~[@mut Vec2] = ~[];
for obj_vec.each |&obj| {
obj_close_vec.push(obj);
}
}
and got:
rustc test_vec.rs
test_vec.rs:14:24: 14:27 error: obsolete syntax: by-mutable-reference mode
test_vec.rs:14 for obj_vec.each |&obj| {
^~~
note: Declare an argument of type &mut T instead
error: aborting due to previous error
hmm, don't know what that means but I will try to get past that error.
Thanks for your quick reply!
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