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  1. #include <iostream>
  2.  
  3. template< typename P >
  4. struct T
  5. {
  6.     P m;
  7.     explicit T( P f = P() ) :
  8. 	m( f )
  9.     {
  10.       std::cout << "T::T()" << std::endl;
  11.     }
  12.     T( T const & f ) :
  13. 	m( f.m )
  14.     {
  15.       std::cout << "T::T( const & )" << std::endl;
  16.     }
  17.         T & operator =( T const & f )
  18.      {
  19.      m = f.m;
  20.      std::cout << "T::operator=( const & )" << std::endl;
  21.      return ( *this );
  22.      }
  23.     T( T && f ) :
  24. 	m( std::move( f.m ) )
  25.     {
  26.       std::cout << "T::T( && )" << std::endl;
  27.     }
  28.         T & operator =( T && f )
  29.      {
  30.      m = std::move( f.m );
  31.      std::cout << "T::operator=( && )" << std::endl;
  32.      return ( *this );
  33.      }
  34.  
  35. /*    T & operator=( T f )
  36.     {
  37.       std::swap( f.m, m );
  38.       std::cout << "T::operator=( T )" << std::endl;
  39.  
  40.       return ( *this );
  41.     }*/
  42. };
  43.  
  44. template< typename P >
  45. T< P > MakeT( P const & f )
  46. {
  47.   return ( T< P >( f ) );
  48. }
  49.  
  50. struct A
  51. {
  52.     A()
  53.     {
  54.     }
  55.     A( A const & )
  56.     {
  57.       std::cout << "A::A( A const & )" << std::endl;
  58.     }
  59.     A & operator =( A const & )
  60.     {
  61.       std::cout << "A::operator=( A const & )" << std::endl;
  62.       return ( *this );
  63.     }
  64.     A( A && )
  65.     {
  66.       std::cout << "A::A( A && )" << std::endl;
  67.     }
  68.  
  69.     A & operator =( A && )
  70.     {
  71.       std::cout << "A::operator=( A && )" << std::endl;
  72.       return ( *this );
  73.     }
  74.     ~A()
  75.     {
  76.       std::cout << "A::~A()" << std::endl;
  77.     }
  78. };
  79.  
  80. int main( void )
  81. {
  82.   T< A > lt = MakeT( A() );
  83.   T< A > lt1;
  84.   std::cout << "------------------" << std::endl;
  85.   lt1 = MakeT( A() );
  86.   std::cout << "------------------" << std::endl;
  87.  
  88.  return( 0 );
  89. }
  90.  
Success #stdin #stdout 0s 2832KB
comments (?)
stdin
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Standard input is empty
stdout
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A::A( A const & )
A::A( A const & )
T::T()
A::~A()
A::~A()
A::A( A const & )
T::T()
A::~A()
------------------
A::A( A const & )
A::A( A const & )
T::T()
A::~A()
A::operator=( A && )
T::operator=( && )
A::~A()
A::~A()
------------------
A::~A()
A::~A()
https://ideone.com/SXgVN
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
public

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