Hi,
I'm playing with sigc++ lambdas and I want to use the dereferencing
operator on a lambda selector.
It doesn't work with objects having operator*, somehow, the compiler
can't deduce the return type.
There might be a simple explanation but I just don't see thru...
<code>
#include <tr1/memory>
#include <sigc++/adaptors/lambda/lambda.h>
class X
{
public:
void do_sg() const
{}
};
int main()
{
std::tr1::shared_ptr<X> p(new X);
sigc::group(&X::do_sg, *sigc::_1)(p);
// error source can be reduced to the following statement:
//(*sigc::_1)(p);
return 0;
}
</code>
g++ compiler error:
/usr/include/sigc++-2.0/sigc++/adaptors/lambda/group.h:93: error:
invalid use of void expression
/usr/include/sigc++-2.0/sigc++/adaptors/lambda/group.h:93: error:
return-statement with a value, in function returning 'void'
/usr/include/sigc++-2.0/sigc++/adaptors/lambda/operator.h:489: error:
return-statement with a value, in function returning 'void'
--
Klaus Triendl
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