std::is_trivial
From cppreference.com
                    
                                        
                    
                    
                                                            
                    | Defined in header  <type_traits> | ||
| template< class T > struct is_trivial; | (since C++11) | |
If T is TrivialType (that is, a scalar type, a trivially copyable class with a trivial default constructor, or array of such type/class, possibly cv-qualified), provides the member constant value equal true. For any other type, value is false.
| Contents | 
Inherited from std::integral_constant
Member constants
| value [static] | true if Tis a trivial type , false otherwise(public static member constant) | 
Member functions
| operator bool | converts the object to bool, returns value(public member function) | 
Member types
| Type | Definition | 
| value_type | bool | 
| type | std::integral_constant<bool, value> | 
[edit] Possible implementation
| template< class T > struct is_trivial : std::integral_constant< bool, std::is_trivially_copyable<T>::value && std::is_trivially_default_constructible<T>::value > {}; | 
[edit] Example
Run this code
#include <iostream> #include <type_traits> struct A { int m; }; struct B { B() {} }; int main() { std::cout << std::boolalpha; std::cout << std::is_trivial<A>::value << '\n'; std::cout << std::is_trivial<B>::value << '\n'; }
Output:
true false
[edit] See also
| (C++11) | checks if a type is trivially copyable (class template) | 


