Re: [Boost-users] Using boost::function and boost::bind

From: A Arabadji (aa5899_at_[hidden])
Date: 2007-11-26 17:31:26

There seemed to be an error here:

addCommand("clear", boost::bind(&Console::clear, this);

If changed to

addCommand("clear", boost::bind(&Console::clear, this, _1);

everything works perfectly.

Boost is amazing!

A Arabadji wrote:
> Hello people!
> 
> I am a new boost user, and I am trying to implement a console for a 
> game, which binds console commands to functions. These functions can 
> come from different objects and this is why I decided to try using boost.
> 
> I am using Visual Studio 8.0 SP1.
> 
> I have something like this:
> 
> //all functions are of generic structure
> //the return nothing and they take a vector of arguments
> typedef boost::function1< void, std::vector<std::string>& > funcHolder;
> 
> //I also have a hash table, which holds function references and the 
> //relative commands:
> 
> std::map<std::string, funcHolder> commands;
> 
> //Finally I have a function:
> void Console::addCommand(const String &command, funcHolder f)
> {
>   std::map<String, funcHolder>::iterator t = commands.find(command);
>   if(t == commands.end()) commands.insert( make_pair(command, f) );
>   else commands[command] = f;
> }
> 
> All of these things are members of a Console class. So once I added 
> these, I tried adding this line to the constructor:
> 
> addCommand("clear", boost::bind(&Console::clear, this);
> 
> //clear method
> void Console::clear( vector<std::string>& args )
> {
>    lines.clear();
> }
> 
> During compilation I get C4180 warnings. I have heard that those are due 
> to VS8.0 SP1 compiler bugs, so I ignore them but then I get a following 
> error:
> 
> Project : error PRJ0002 : Error result 1 returned from 'C:\Program 
> Files\Microsoft Visual Studio 8\VC\bin\cl.exe'.
> 
> Compiler basically crashes.
> 
> Any ideas what might be wrong?
> 
> I thank everyone in advance,
> Artyom