ISO C++ forbids declaration of `result_type' with no type

[Kelvin LIM <kelvin_lim@xxxxxxxxxxxxxxxx>]

Hi,

I am get compilation error when using gcc 3.4 on i386 platform related to
template :

ERROR MESSAGE:
include/template:168: error: ISO C++ forbids declaration of `result_type'
with no type
include/template:168: error: expected `;' before "operator"
/include/template:171: error: expected `;' before "protected"


SOURCE FILE:

template<class _Bfn>
        class binder1st
        : public unary_function<typename _Bfn::second_argument_type,
typename _Bfn::result_type> {

        public:
            binder1st(const _Bfn& _X,
                const typename _Bfn::first_argument_type& _Y) : op(_X),
value(_Y) {}
            result_type operator()(const argument_type& _X) const // Error
here ! Line 168
                {return (op(value, _X)); }

        protected:
            _Bfn op;
            typename _Bfn::first_argument_type value;

        };



Everything use to run fine on gcc 3.3.x. Any suggestion to fix this issue ?
Thanks



Best Regards
Kelvin Lim

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