coercing template category user t* flitting t* justification duty template

assume i have duty template this:

template<class t>
inline
void
dostuff(t* arr)
{
  // things needs sizeof(t)
}

then another .h filee i have template category foo has:

public: user t*() const;

now, i comprehend those opposite ts. nonetheless i have non-static foo<bar> f stack, wholly proceed need any kind pointer plead operator t*(). yet, dostuff(f), gcc complains dostuff can't take foo<bar> instead automatically controlling user t*() need bar* following specializing duty template bar t.

is there anything i work twin templates? does presumably justification template duty have genuine pointer form template category duress user upheld non-template function?