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  1. #include <type_traits>
  2. #include <iostream>
  3.  
  4. //#define USE_REAL
  5.  
  6. enum GLenum {TEST};
  7.  
  8. typedef void (*func_type)(GLenum, const void*);
  9.  
  10. #ifdef USE_REAL
  11. void glDrawArraysIndirect(GLenum, const void*);
  12. #endif
  13.  
  14. namespace detail {
  15.     struct dummy {};
  16.  
  17.     template<typename T = dummy>
  18.     void glDrawArraysIndirect(GLenum, const void*, T = T())
  19.     {
  20.     	std::cout << "In placeholder function" << std::endl;
  21.     }
  22.  
  23. }
  24.  
  25. void wrapDraw(GLenum x, const void* y)
  26. {
  27.   using namespace detail;
  28.   glDrawArraysIndirect(x, y);
  29. }
  30.  
  31. #ifdef USE_REAL
  32. void glDrawArraysIndirect(GLenum, const void*)
  33. {
  34. 	std::cout << "In real function" << std::endl;
  35. }
  36. #endif
  37.  
  38. int main()
  39. {
  40. 	wrapDraw(TEST, nullptr);
  41. }
Success #stdin #stdout 0s 3460KB
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In placeholder function
https://ideone.com/Ci3nSc
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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