Re: [boost] [function] does calling boost::function from boost::function involve nested virtual calls?

7 Nov 2010

      AMDG

On 11/6/2010 9:02 PM, Mostafa wrote:
...
Hi all,
Correct me if I'm wrong, using boost::function involves a virtual 
function call.
Not exactly, but close enough for practical purposes.
...
If so, then does nesting boost::function calls result in nested 
(multiple) virtual function calls?
Yes.
...
For example:
int foo(float);
boost::function<int (float)> f1 = foo;
boost::function<double (int)> f2 = f1;
Does f2(5) result in two virtual functions being called on the part of 
boost::function?
(I couldn't find the answer in the documentation and reading the 
source code I got lost in the macros.)
In Christ,
Steven Watanabe