I have a struct A:
struct A
{
//some implementation
}
My boost variants are:
boost::variant<double, A> v1 = 1.0;
boost::variant<double, A> v2 = 2.0;
My visitor functor is defined as:
class SomeWork:
public boost::static_visitor<int>
{
public:
int operator()(const A& data1, const A& data2) const
{
//some work
return 1;
}
int operator()(const double& data1, const double& data2) const
{
//some work
return 2;
}
};
int main()
{
boost::variant<double, A> v1 = 1.0;
boost::variant<double, A> v2 = 2.0;
boost::apply_visitor(SomeWork(), v1 ,v2);
return 0;
};
When I do above I get an error saying:
error C2664: 'int SomeWork::operator ()(const A&, const A&) const': cannot convert argument 2 from 'T' to 'const double &'
Not sure why this happening.
boost version I am using is 107200
Thanks in advance.
boost::apply_visitor
needs to consider every possible combination of types that your variant
instances hold. This means SomeWork
is missing the following combinations:
int operator()(const A& data1, const double& data2) const
{
//some work
return 3;
}
int operator()(const double& data1, const A& data2) const
{
//some work
return 4;
}
When adding those, I'm able to compile your code.