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#include <cstdlib>
#include <iostream>
#include <boost/type_traits.hpp>
#include <boost/utility/enable_if.hpp>
 
template<typename T>
struct Foo
{
	typename boost::enable_if_c<boost::is_same<char,T>::value >::type
	bar();
 
	typename boost::disable_if_c<boost::is_same<char,T>::value >::type
	bar();
};
 
template<typename T>
typename boost::disable_if_c<boost::is_same<char,T>::value >::type
Foo<T>::bar()
{
	std::cout << "I am generic ..." << std::endl;
}
 
template<typename T>
typename boost::enable_if_c<boost::is_same<char,T>::value >::type
Foo<T>::bar()
{
	std::cout << "I am specific ..." << std::endl;
}
 
int main()
{
	Foo<char> f1;
	f1.bar();
 
	return EXIT_SUCCESS;
}
 

prog.cpp:13: error: ‘typename boost::disable_if_c<boost::is_same::value, void>::type Foo<T>::bar()’ cannot be overloaded
prog.cpp:10: error: with ‘typename boost::enable_if_c<boost::is_same::value, void>::type Foo<T>::bar()’
prog.cpp:18: error: prototype for ‘typename boost::disable_if_c<boost::is_same::value, void>::type Foo<T>::bar()’ does not match any in class ‘Foo<T>’
prog.cpp:10: error: candidate is: typename boost::enable_if_c<boost::is_same::value, void>::type Foo<T>::bar()

Standard output is empty