Hi David,
My current thinking on the matter is that eventually, I would like to
take advantage of the coherence rules to permit a program like
this. Coherence means that given a specific type T and trait U, we can
always tell whether T implements U. This implies that we could do the
check as you
Hi,
When I try to compile the below program, why do I get a conflicting
implementations error? I do not define any implementations of Bar, so
the parameterized impl of Foo should never get instantiated, right?
---
trait Foo {
fn foo() - Self;
}
trait Bar : std::num::Zero {
On Thu, Sep 5, 2013 at 9:29 AM, David Renshaw dwrens...@gmail.com wrote:
Hi,
When I try to compile the below program, why do I get a conflicting
implementations error? I do not define any implementations of Bar, so
the parameterized impl of Foo should never get instantiated, right?
On Thu, Sep 5, 2013 at 3:36 PM, Tim Chevalier catamorph...@gmail.comwrote:
The reason is that there is no guarantee that you will never use this
code in a context where another module defines an impl of Bar for u16.
In that scenario, you would have two different impls of Foo for u16,
and no
