fork download
copy 
  1. #include <stdio.h>
  2. #include <map>
  3.  
  4. #define LOCAL_VAR_DECL( type, var_name ) static std::map<void*, type> var_name
  5. #define LOCAL_VAR_INIT( var_name ) if ( var_name.find( this ) == var_name.end() ) var_name[this]
  6. #define LOCAL_VAR_DEF( type, var_name, init ) LOCAL_VAR_DECL( type, var_name ); LOCAL_VAR_INIT( var_name ) = init
  7. #define LOCAL_VAR( var_name ) var_name[this]
  8.  
  9. class A
  10. {
  11. public:
  12. 	void Func( void )
  13. 	{
  14. 		LOCAL_VAR_DEF( int, m_State, 0 );
  15. 		#define m_State LOCAL_VAR( m_State )
  16.  
  17. 		switch( m_State )
  18. 		{
  19. 		    case 0:
  20. 		    {
  21. 		    	printf( "m_State = 0\n" );
  22. 		    	m_State = 1;
  23. 		    	break;
  24. 		    }
  25. 		    case 1:
  26. 		    {
  27. 		    	printf( "m_State = 1\n" );
  28. 		    	m_State = 0;
  29. 		    	break;
  30. 		    }
  31. 		}
  32. 	}
  33. 	void func2( void )
  34. 	{
  35. 		/* error: 'm_State' was not declared in this scope
  36. 		m_State = 0;
  37. 		*/
  38. 	}
  39. };
  40.  
  41. int main() {
  42. 	A a;
  43. 	a.Func();
  44. 	a.Func();
  45. 	a.Func();
  46. 	return 0;
  47. }
Success #stdin #stdout 0s 2864KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
m_State = 0
m_State = 1
m_State = 0
https://ideone.com/C1rUV5
language:
C++ 4.3.2 (gcc-4.3.2)
created:
7 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!