that's great. thanks.
I tried the following, but unsuccessfully.
struct Vec {
x:float, y:float
}
trait VecRhs {
fn add_to_Vec(&self, lhs: &Vec) -> Vec;
}
impl Add<Vec, VecRhs> for Vec {
fn add(&self, rhs: &VecRhs) -> Vec {
rhs.add_to_Vec(self)
}
}
impl VecRhs for float {
fn add_to_Vec(&self, lhs: &Vec) -> Vec {
Vec{x:lhs.x+*self, y:lhs.x+*self};
}
}
I get the following errors:
rustc test.rs -o test-test --test
test.rs:50:14: 50:20 error: reference to trait `VecRhs` where a type is
expected; try `@VecRhs`, `~VecRhs`, or `&VecRhs`
test.rs:50 impl Add<Vec, VecRhs> for Vec {
^~~~~~
test.rs:51:4: 53:5 error: method `add` has an incompatible type: expected
&-ptr but found trait VecRhs
test.rs:51 fn add(&self, rhs: &VecRhs) -> Vec {
test.rs:52 rhs.add_to_Vec(self)
test.rs:53 }
error: aborting due to 2 previous errors
make: *** [test-test] Error 101
I feel sorry to ask so many newbies questions. I would really like to go
past the first learning curve and proceed to my initial project.
thanks for your help.
Rémi
On Sun, Jun 16, 2013 at 1:15 AM, Benjamin Striegel
<[email protected]>wrote:
> This blog post describes how you would achieve this:
>
>
> http://smallcultfollowing.com/babysteps/blog/2012/10/04/refining-traits-slash-impls/
>
> See the section entitled "What if I want overloading?"
>
>
> On Sat, Jun 15, 2013 at 5:52 AM, Rémi Fontan <[email protected]> wrote:
>
>> Hi,
>>
>> I read that rust does not handle function overloading. So I seek your
>> advise to how I should be handling the following case.
>>
>> I have a struct vec2d, which is a 2d vector. vec2d{x:float, y:float}
>>
>> I would like to implement the trait Mul such that I can multiply a vector
>> by another vector, component by component
>>
>> let v1: Vec2d = ...;
>> let v2: Vec2d = ...;
>> v1*v2;
>>
>> but I also would like to be able to multiply a vec2d with a scalar.
>> let v3 = v1*-1f;
>>
>> I tried implementing the trait Mul twice but the compiler complains. How
>> would you do it?
>>
>> cheers,
>>
>> Rémi
>>
>>
>> --
>> Rémi Fontan : [email protected]
>> mobile: +64 21 855 351
>> 93 Otaki Street, Miramar 6022
>> Wellington, New Zealand
>>
>> _______________________________________________
>> Rust-dev mailing list
>> [email protected]
>> https://mail.mozilla.org/listinfo/rust-dev
>>
>>
>
> _______________________________________________
> Rust-dev mailing list
> [email protected]
> https://mail.mozilla.org/listinfo/rust-dev
>
>
--
Rémi Fontan : [email protected]
mobile: +64 21 855 351
93 Otaki Street, Miramar 6022
Wellington, New Zealand
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