Re: address of virtual member function passed as template argument

From:

"Ben Voigt" <rbv@nospam.nospam>

Newsgroups:

microsoft.public.vc.language

Date:

Mon, 19 Mar 2007 13:06:24 -0500

Message-ID:

<en9ByDlaHHA.3612@TK2MSFTNGP04.phx.gbl>

The problem is that this doesn't fit my needs. But thank you for your
response.
I want to use Boost.Property and therefor it need to pass those
addresses to boost::property::object_property<...>

consider the following example:
<code>
class foo
{
private:
int value;

public:
int getValue() const { return value; }
void setValue(const int& v) { value = v; }

boost::scalar_property< boost::object_property
<
char, foo,
&foo::getValue,
&foo::setValue

Value;

};
</code>

If you make getValue() oder setValue() virtual, it crashes.
Well, i could pass pointers to getValue and setValue to the property
using it's custuctor at RunTime.
But i had to write my own property-lib for that and (more importantly)
it wouldn't fit into my OOP-system that well. (would be better if
every devired class _had_ to use getValue and setValue for their
properties)

How about:

class foo
{
private:
int value;

int proxygetValue() const { return getValue(); }
void proxysetValue(const int& v) { setValue(v); }
public:
virtual int getValue() const { return value; }
virtual void setValue(const int& v) { value = v; }

boost::scalar_property< boost::object_property
<
char, foo,
&foo::proxygetValue,
&foo::proxysetValue
> > Value;
};