On 11/30/05, David Abrahams wrote:

Chris Goller writes:

...

I have code that will compile using msvc 7.1 but will not under intel 9.0.

Here is some simplified code to illustrate my problem:

using namespace boost; using namespace std; typedef array array_type;

array_type a; a[0] = 0; a[1] = 1;

vector v; v.push_back(a); vector<int> h;

for_each(v.begin(), v.end(), mem_fun_ref(&array_type::front));

This compiles and runs using msvc 7.1, but intel 9.0 errors with the following:

error: more than one instance of overloaded function "mem_fun_ref" matches the argument list: function template "std::mem_fun_ref(_Result (_Ty::*)() const)" function template "std::mem_fun_ref(_Result (_Ty::*)())" argument types are: (<unknown-type>)

Solution:

Don't use std::mem_fun_ref Use boost::mem_fn instead.

http://www.boost.org/libs/bind/mem_fn.html#Q1

HTH, -- Dave Abrahams Boost Consulting www.boost-consulting.com

Sadly, the same problem: works with msvc 7.1 put not intel 9.0: error: more than one instance of overloaded function "mem_fn" matches the argument list: function template "boost::mem_fn(R (T::*)() const)" function template "boost::mem_fn(R (T::*)())" argument types are: (<unknown-type>) This problem initially came up when I was using boost::bind in this way: make_transform_iterator(v.begin(), bind(&array_type::at, _1, 0)) Intel 9.0 had these errors: error: more than one instance of overloaded function "bind" matches the argument list: function template "boost::bind(R (T::*)(B1), A1, A2)" function template "boost::bind(R (T::*)(B1) const, A1, A2)" argument types are: (<unknown-type>, boost::arg<1>, int) Thanks, Chris

On 11/30/05, Peter Dimov wrote:

Chris Goller wrote:

...

Sadly, the same problem: works with msvc 7.1 put not intel 9.0:

error: more than one instance of overloaded function "mem_fn" matches the argument list: function template "boost::mem_fn(R (T::*)() const)" function template "boost::mem_fn(R (T::*)())" argument types are: (<unknown-type>)

This problem initially came up when I was using boost::bind in this way:

make_transform_iterator(v.begin(), bind(&array_type::at, _1, 0))

This is a bug in MSVC 7.1, I guess. You need to disambiguate:

array_type::reference (array_type::* pmf) (array_type::size_type) = &array_type::at;

make_transform_iterator( v.begin(), bind(pmf, _1, 0) );

Unfortunately, there is no way to tell from bind(&array_type::at, _1, 0) whether you need the const or non-const overload, and it is not possible to somehow store both overloads for later use.

Peter, thanks, you rock. I finally understand what is going on here. Is this a more elegant way? boost::make_transform_iterator(v.end(), bind(static_cast(&array_type::at), _1, 0)); Chris