Rant after trying Rust a bit

[Walter Bright via Digitalmars-d]

On 7/25/2015 3:28 PM, deadalnix wrote:
> Also, argument from ignorance is hard to maintain when the thread is an actual
> feedback from experience.

You say that interfaces do the same thing. So please show how it's done with the 
example I gave:

     int foo(T: hasPrefix)(T t) {
        t.prefix();    // ok
        bar(t);        // error, hasColor was not specified for T
     }

     void bar(T: hasColor)(T t) {
        t.color();
     }