fork(1) download
copy 
  1. #include <vector>
  2. #include <iostream>
  3. #include <functional>
  4.  
  5. template<typename ...Params>
  6. struct Publisher
  7. {
  8.    using Signature    = void( Params... );
  9.    using FunctionType = std::function<Signature>;
  10.  
  11.    std::vector<FunctionType> Subscribers_;
  12.  
  13.    void subscribe( Signature FreeFunc )
  14.    {
  15.       Subscribers_.emplace_back( FreeFunc );
  16.    }
  17.  
  18.    template<typename ObjType>
  19.    void subscribe( ObjType* Obj, void (ObjType::*MemFun)( Params... ) )
  20.    {
  21.       Subscribers_.push_back( std::bind( MemFun, Obj,
  22.                               std::placeholders::_1 ) );
  23.    }
  24.  
  25.    void operator()( Params&&... p )
  26.    {
  27.       for( const auto& Sub : Subscribers_ )	
  28.       {
  29.          Sub( std::forward<Params>( p )... );	
  30.       }
  31.    }
  32. };
  33.  
  34. void func1( unsigned int )
  35. {
  36. }
  37.  
  38. void func2( unsigned int& )
  39. {
  40. }
  41.  
  42. void func3( const unsigned int& )
  43. {
  44. }
  45.  
  46. struct Test
  47. {
  48.    void func1( unsigned int )
  49.    {
  50.    }
  51.  
  52.    void func2( unsigned int& )
  53.    {
  54.    }
  55.  
  56.    void func3( const unsigned int& )
  57.    {
  58.    }
  59. };
  60.  
  61. int main()
  62. {
  63.    Publisher<unsigned int&> Pub;
  64.  
  65. //   Pub.subscribe( &func1 );
  66.    Pub.subscribe( &func2 );
  67. //   Pub.subscribe( &func3 );
  68.  
  69.    Test t;  
  70. //   Pub.subscribe( &t, &Test::func1 );
  71.    Pub.subscribe( &t, &Test::func2 );
  72. //   Pub.subscribe( &t, &Test::func3 );
  73.  
  74.    unsigned int Arg = 1;
  75.    Pub( Arg );
  76. }
  77.  
Success #stdin #stdout 0s 15240KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Standard output is empty
https://ideone.com/KsGP9m
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!