errP

errP(value)

• Casts T into ErrP<T>
• Casts Promise<T> into ErrP<T>
• Casts other Result types into their async counterparts

errP(true); //=> ErrP<boolean>
errP(Promise.resolve(true)); //=> ErrP<boolean>
errP(ok(true)); //=> OkP<boolean>
errP(err(true)); //=> ErrP<boolean>
errP(okP(true)); //=> OkP<boolean>
errP(errP(true)); //=> ErrP<boolean>