[Boost-users] boost::result_of and pure virtual functor leads to compile error

Subject: [Boost-users] boost::result_of and pure virtual functor leads to compile error
From: oswin krause (oswin.krause_at_[hidden])
Date: 2013-04-29 15:08:32

Hi list,

I am necountering an error when trying to use boost::result_of on a pure 
virtual base class.

minimal example:

struct Test{
     typedef int result_type;
     virtual int operator()(int)=0;
};
typedef boost::result_of<Test(int)>::type type;

leads with gcc 4.8 (and with every compiler i know of) to the following 
output:

Error: »type name« declared as function returning an abstract class type
  typedef boost::result_of<Test(int)>::type type;

(actually in the original code where this showed up, gcc compiles it 
just fine only every other compiler fails, but in this very simple 
example, even gcc get's the message...)

Any chance to use result_of in this setting? I clearly can't use the 
function call syntax here, which is a little bit annoying.

Greetings,
Oswin