manifest - Scala: Problems with erasure on overriding equals function for parametrized classes -

i'm having troubles on understanding how use manifests.

that's problem: i've creat new parametrized class c , tryed override equals this:

override def equals(that:any)=that match{  case that:c[t] => true /*do smth else not relevant*/  case _ => false } 

of course recieve "warning: non variable type-argument t in type pattern c[t] unchecked since eliminated erasure". tryied using manifests using in many other functions:

override def equals(that:any)(implicit manifest:manifest[t])=that match{  case that:c[t] => true  case _ => false } 

but recieved "error: method equals overrides nothing" message.

i don't know how fix this. please me?

you can't fix it. welcome joys of smooth interoperation java. way improve equals def equals(x: any): boolean write different method.

i'm trying convince martin should implement == desugaring differently, aiming @ "def decentequals[t](x: t)(implicit equiv: equiv[t])" default implicits , bridge methods make seamless unless care, thinks equality tests shouldn't slower.