Is there C/C++ equivalent of eval("function(arg1, arg2)")?

Question

it need a way to call function whose name is stored in a string similar to eval. Can you help?

Answer 1

C++ doesn't have reflection so you must hack it, i. e.:

#include <iostream> #include <map> #include <string> #include <functional>  void foo() { std::cout << "foo()"; } void boo() { std::cout << "boo()"; } void too() { std::cout << "too()"; } void goo() { std::cout << "goo()"; }  int main() {   std::map<std::string, std::function<void()>> functions;   functions["foo"] = foo;   functions["boo"] = boo;   functions["too"] = too;   functions["goo"] = goo;    std::string func;   std::cin >> func;   if (functions.find(func) != functions.end()) {     functions[func]();   }   return 0; } 

Answer 2

There are at least 2 alternatives:

• The command pattern.
• On windows, you can use GetProcAddress to get a callback by name, and dlopen + dlsym on *nix.