Type resolveImplicitThis(DiagnosticPosition pos, Env<AttrContext> env, Type t) {
        Type thisType = (((t.tsym.owner.kind & (MTH|VAR)) != 0)
                         ? resolveSelf(pos, env, t.getEnclosingType().tsym, names._this)
                         : resolveSelfContaining(pos, env, t.tsym)).type;
        if (env.info.isSelfCall && thisType.tsym == env.enclClass.sym)
            log.error(pos, "cant.ref.before.ctor.called", "this");
        return thisType;
    }