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  1. #include <string>
  2. #include <typeinfo>
  3.  
  4. #ifdef __GNUG__
  5.  
  6.     #include <cxxabi.h>
  7.     #include <cstdlib>
  8.     #include <memory>
  9.  
  10.     template< typename T > std::string type_name()
  11.     {
  12.         int status ;
  13.         std::unique_ptr< char[], decltype(&std::free) > buffer(
  14.             __cxxabiv1::__cxa_demangle( typeid(T).name(), nullptr, 0, &status ), &std::free ) ;
  15.         return status==0 ? buffer.get() : "__cxa_demangle error" ;
  16.     }
  17.  
  18. #else // !defined __GNUG__
  19.  
  20.     template< typename T > std::string type_name() { return typeid(T).name() ; }
  21.  
  22. #endif //__GNUG__
  23.  
  24. template< typename T > std::string type_name( const T& ) { return type_name<T>() ; }
  25.  
  26.  
  27. #define print_type_name(var) ( std::cout << #var << " is of type " << type_name(var) << "\n\n" )
  28.  
  29. #include <iostream>
  30.  
  31. int main()
  32. {
  33.     int array2D[3][3] = { { 1,  5,  6 }, { 45, 65, 65}, { 78, 10, 99 } } ;
  34.  
  35.     auto ptr = array2D+1 ;
  36.  
  37.     print_type_name( ptr ) ; // ptr is of type int (*) [3]
  38.  
  39.     print_type_name( *ptr ) ; // *ptr is of type int [3]
  40.  
  41. }
  42.  
Success #stdin #stdout 0s 3472KB
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Standard input is empty
stdout
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ptr is of type int (*) [3]

*ptr is of type int [3]
https://ideone.com/vHL1wW
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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