C++ std::is_trivially_copy_constructible














































C++ std::is_trivially_copy_constructible



/**C++ std::is_trivially_copy_constructible**/ /**This algorithm is about to test whether a type is trivially copy constructible or not. Function Template: template<class T, class....args>struct is_trivially_copy_constructible; Parameter: T=The type of query. args=The argument type that match in a trivially copy constructor of T. An instance of the type predicate holds true if the type is trivially copy constructible by using the argument types in args, and the trivially copy constructor is known by the compiler not to throw, otherwise it holds false.**/ Algorithm: #include<bits/stdc++.h> #include<type_traits> #include<string> using namespace std; struct A { string str; }; struct B{ B(); }; class C { string s; }; int main() { cout << boolalpha; cout << "is_trivially_copy_constructible" << endl; cout << "int: " << is_trivially_copy_constructible<int>::value << endl; cout << "float: " << is_trivially_copy_constructible<float>::value << endl; cout << "A: " << is_trivially_copy_constructible<A>::value << endl; cout << "B: " << is_trivially_copy_constructible<B>::value << endl; cout << "long long int: " << is_trivially_copy_constructible<long long int>::value << endl; cout << "C: " << is_trivially_copy_constructible<C>::value << endl; return 0; } /** Output: is_trivially_copy_constructible int: true float: true A: false B: true long long int: true C: false **/

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