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  1. #include <cstring>
  2. #include <iostream>
  3.  
  4. template <size_t Size>
  5. void foo_array( const char (&data)[Size] )
  6. {
  7.     std::cout << "named\n";
  8. }
  9.  
  10. template <size_t Size>
  11. void foo_array( char (&&data)[Size] )  //rvalue of arrays?
  12. {
  13.     std::cout << "temporary\n";
  14. }
  15.  
  16.  
  17. struct A {};
  18.  
  19. void foo( const A& a )
  20. {
  21.     std::cout << "named\n";
  22. }
  23.  
  24. void foo( A&& a )
  25. {
  26.     std::cout << "temporary\n";
  27. }
  28.  
  29. template <typename T>
  30. struct identity {
  31.     typedef T type;
  32. };
  33.  
  34. int main( /* int argc, char* argv[] */ )
  35. {
  36.     A a;
  37.     const A a2 = {};
  38.  
  39.     foo(a);
  40.     foo(A());               //Temporary -> OK!
  41.     foo(a2);
  42.  
  43.     //------------------------------------------------------------
  44.  
  45.     char arr[] = "hello";
  46.     const char arr2[] = "hello";
  47.  
  48.     foo_array(arr);
  49.     foo_array(identity<char[2]>::type{1,2});
  50.     foo_array(arr2);
  51.  
  52.     return 0;
  53. }
  54.  
Success #stdin #stdout 0s 2828KB
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stdin
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Standard input is empty
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named
temporary
named
named
temporary
named
https://ideone.com/lgItR
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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