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  1.     #include <iostream>
  2.  
  3.     typedef int (*FuncPtr_t)(void*, int);
  4.     static int simpleFunction(FuncPtr_t pfunc, void *context, int nos)
  5.     {
  6.         pfunc(context, nos);
  7.     }
  8.  
  9.     struct A {
  10.         int i;
  11.         int pf(int nos) { std::cout << i << " nos = " << nos << "\n"; return i; }
  12.     };
  13.  
  14.     int main() {
  15.         A a { 1234 };
  16.         // could combine the next two lines into one, I didn't.
  17.         auto trampoline = [](void *inst, int nos) { return ((A*)inst)->pf(nos); };
  18.         simpleFunction(trampoline, &a, 42);
  19.     }
  20.  
Success #stdin #stdout 0s 3460KB
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stdin
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Standard input is empty
stdout
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1234 nos = 42
https://ideone.com/74Xhes
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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