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  1. #include <iostream>
  2. #include <string>
  3. using namespace std;
  4.  
  5.  
  6. namespace ns1
  7. {
  8.  
  9.     enum E
  10.     {
  11.     	e1, e2
  12.     };
  13.  
  14. 	void printVal( E e )
  15. 	{
  16. 		switch(e)
  17. 		{
  18. 			case e1: cout<<"E: e1\n"; break;
  19. 			case e2: cout<<"E: e2\n"; break;
  20. 		};
  21. 	}
  22.  
  23. 	void printVal( int val)
  24. 	{
  25. 		cout<<"int: "<<val<<"\n";
  26. 	}
  27.  
  28. 	void printVal( unsigned val)
  29. 	{
  30. 		cout<<"unsigned: "<<val<<"\n";
  31. 	}
  32.  
  33. 	void printVal( const char* s )
  34. 	{
  35. 		cout<<"const char*: "<<s<<"\n";
  36. 	}
  37.  
  38. 	void printVal( std::string s )
  39. 	{
  40. 		cout<<"std::string: "<<s<<"\n";
  41. 	}
  42.  
  43. 	template< typename T >
  44. 	void printTpl( const T &t)
  45. 	{
  46. 		cout<<"Tpl: "<<t<<"\n";
  47. 	}
  48.  
  49. 	template<>
  50. 	void printTpl<unsigned>( const unsigned &t)
  51. 	{
  52. 		cout<<"Tpl<unsigned>: "<<t<<"\n";
  53. 	}
  54.  
  55. } // namespace ns1
  56.  
  57. namespace ns2
  58. {
  59. 	using ns1::printVal;
  60. 	using ns1::printTpl;
  61. 	using ns1::E;
  62.  
  63. }
  64.  
  65.  
  66. int main() {
  67.  
  68. 	ns2::E e = ns2::e1;
  69. 	int          i = 8;
  70. 	unsigned     u = 10;
  71. 	std::string  s = "sss";
  72. 	const char * str = "str";
  73.  
  74. 	ns2::printVal(e);
  75. 	ns2::printVal(i);
  76. 	ns2::printVal(u);
  77. 	ns2::printVal(s);
  78. 	ns2::printVal(str);
  79. 	cout<<"---\n";
  80. 	ns2::printTpl(i);
  81. 	ns2::printTpl(u);
  82. 	ns2::printTpl(s);
  83. 	ns2::printTpl(str);
  84. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
prog.cpp: In function ‘int main()’:
prog.cpp:68:18: error: ‘e1’ is not a member of ‘ns2’
  ns2::E e = ns2::e1;
                  ^~
prog.cpp:68:18: note: suggested alternative:
prog.cpp:11:6: note:   ‘e1’
      e1, e2
      ^~
stdout
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Standard output is empty
https://ideone.com/ddSG5J
language:
C++ (gcc 8.3)
created:
4 years ago
visibility:
public

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