Trait class that identifies whether T is a trivial type. A trivial type is a type whose storage is contiguous (trivially copyable) and which only supports static default initialization (trivially default constructible), either cv-qualified or not. It includes scalar types, trivial classes and arrays of any such types.
A trivial class is a class (defined with class, struct or union) that is both trivially default constructible and trivially copyable, which implies that:
- It uses the implicitly defined default, copy and move constructors, copy and move assignments, and destructor.
- It has no virtual members.
- It has no non-static data members with brace- or equal- initializers.
- Its base class and non-static data members (if any) are themselves also trivial types.
is_trivial inherits from integral_constant as being either true_type or false_type, depending on whether T is a trivial type
template struct is_trivial;
std::is_trivial::value Here A is a class which has been passed as a parameter to the function is_trivial and it will return a value of integral constant type bool i.e. either true or false
A: true B: false C: false D: false
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