Re: How to call a function just using a string?

From:

terminator <farid.mehrabi@gmail.com>

Newsgroups:

comp.lang.c++

Date:

Thu, 6 Dec 2007 09:44:28 -0800 (PST)

Message-ID:

<a28556d8-90b0-44ee-b05f-6ca7377f532b@e10g2000prf.googlegroups.com>

On Dec 6, 8:37 am, Kira Yamato <kira...@earthlink.net> wrote:

On 2007-12-04 06:04:46 -0500, terminator <farid.mehr...@gmail.com> said:

On Dec 4, 12:37 pm, dolphin <jdxyw2...@gmail.com> wrote:

Hi All!
I have a question that how to call a function just using a string.
For example
There is a .cpp file named a.cpp.There are some functions::fun1()
fun2() fun3().
I have another fucntion void funcall( char *pch). if I pass a
argument char* p1="fun1" .How do I call the function fun1() using that
string "fun1"that I pass.

#include <map>
#include <string>

typedef std::map<std::string,void(*)(void)> FuncMapTypeBase;

struct FuncMapType :
   FuncMapTypeBase
{
   FuncMapType(){
      (*this)["fun1"]=&fun1;
      (*this)["fun2"]=&fun2;
      (*this)["fun3"]=&fun3;
   }
};

const FuncMapType &funxns(){
   static FuncMapType funcs;

Will this be allowed here? FuncMapType has private constructor.

Otherwise, your code is a nice demonstration of how to do object
aggregation and singleton.

return funcs;
};

void funcall(const std::string& str){
(*(funcxns()[str]))();
};

had I used the 'class' keyword you would have been ahead by one
point ,But it is a 'struct'( because I am lazy in typing) and has
default public access.

regards,
FM.