Hi,
I am rather beginner at boost - I am trying to achieve functionality
similiar to property getter/setter from managed languages like C#. I
have written the following code:
#include "boost\lambda\bind.hpp"
#include "boost\variant.hpp"
#include "boost\optional.hpp"
#include <iostream>
#include <map>
class Test
{
public:
boost::optional> m_value;
};
int _tmain(int argc, _TCHAR* argv[])
{
Test t1, t2;
auto b1 = boost::lambda::bind(&Test::m_value, boost::lambda::_1);
auto b2 = boost::lambda::bind(Test::m_value::get_value_or,
boost::lambda::_1, "empty");
b1(t1) = "Test value";
std::cout << b2(t1); // "Test value"
std::cout << b2(t2); // Should be "empty"
return 0;
}
Unfortunately the compilers says:
boost_tests.cpp(32): error C3083: 'm_value': the symbol to the left of
a '::' must be a type
boost_tests.cpp(32): error C2039: 'get_value_or' : is not a member of 'Test'
boost_tests.cpp(22) : see declaration of 'Test'
boost_tests.cpp(32): error C2065: 'get_value_or' : undeclared identifier
boost_tests.cpp(32): fatal error C1903: unable to recover from
previous error(s); stopping compilation
I'd like to create a bind to Test::m_value.get_value_or() function
with the first parameter set to "empty" - any ideas how to achieve
that?
Regards,
Konrad.
