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

[kelth78]

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

[gpraghuram]

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

Hi
Can you post some more code where the error is occuring?
Do post with code tags

Raghuram

[kelth78]

Hi,

Here it is :


template<class _A, class _R>
struct unary_function {
typedef _A argument_type;
typedef _R result_type;
};


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
{return (op(value, _X)); }
protected:
_Bfn op;
typename _Bfn::first_argument_type value;
};

int main()
{
}


COMPILATION ERROR :
main.cpp:15: error: ISO C++ forbids declaration of `result_type' with no type
main.cpp:15: error: expected `;' before "operator"
main.cpp:17: error: expected `;' before "protected"




Thanks :)

[weaknessforcats]

This compiles without error using Visual Studio.NET 2005.