Re: mem_fun error
joseph cook wrote:
I am getting a compile error on any compiler I try, so I know I have
an error here. Can anyone see it?
//includes
class Foo
{
public:
Foo(int a){m_hi = a;}
int hi(){return m_hi;}
This is not a proper comparison function.
int m_hi;
};
int main()
{
std::vector<Foo *> data;
data.push_back(new Foo(3));
max_element(data.begin(),
data.end(),
std::mem_fun(&Foo::hi));
The third argument needs to be a comparison function with a very
specific signature. Think how your 'hi' should be used with TWO
arguments of type Foo*.
}
gives a compile error:
in gcc: stl_algo.h:4565: error: no match for call to
'(std::mem_fun_t<int, Foo>) (Foo*&,Foo*&)'
stl_function.h:600: note: candidates are: _Ret
std::mem_fun_t<_Ret,_Tp>::operator()(_Tp*) const [with _Ret = int,
_Tp = Foo]
help!
}
V
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