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  1.  
  2. #include <iostream>
  3.  
  4. class A
  5. {
  6.    public:
  7.    void foo()
  8.    {
  9.       std::cout << __func__ << " calling\n";
  10.    }
  11.    void special_bar_A()
  12.    {
  13.       std::cout << __func__ << " calling\n";
  14.    }
  15.    void baz()
  16.    {
  17.       std::cout << __func__ << " calling\n";
  18.    }
  19. };
  20.  
  21. class B
  22. {
  23.    public:
  24.    void foo()
  25.    {
  26.       std::cout << __func__ << " calling\n";
  27.    }
  28.    void special_bar_B()
  29.    {
  30.       std::cout << __func__ << " calling\n";
  31.    }
  32.    void baz()
  33.    {
  34.       std::cout << __func__ << " calling\n";
  35.    }
  36. };
  37.  
  38. template<class T> void special_stuff(T &)
  39. {
  40.    std::cout << "something went wrong\n";
  41. }
  42.  
  43. template<>
  44. void special_stuff(A &a)
  45. {
  46.    a.special_bar_A();
  47. }
  48.  
  49. template<>
  50. void special_stuff(B &b)
  51. {
  52.    b.special_bar_B();
  53. }
  54.  
  55. template<class T>
  56. void do_stuff()
  57. {
  58.    T t;
  59.    t.foo();
  60.    special_stuff<T>(t);
  61.    t.baz();
  62. }
  63.  
  64. int main()
  65. {
  66.    do_stuff<A>();
  67.    do_stuff<B>();
  68. }
  69.  
Success #stdin #stdout 0s 2896KB
comments (?)
stdin
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Standard input is empty
stdout
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foo calling
special_bar_A calling
baz calling
foo calling
special_bar_B calling
baz calling
https://ideone.com/uFzdVc
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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