What is the definition of a trivial destructor?
A trivial destructor is a destructor that performs no action. Objects with trivial destructors do not require a delete expression and can be deleted simply by deallocating their storage. All data types supported by the C language (POD types) are trivially destructible.
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Can a destructor be called on an ordinary object?
Note that calling a destructor directly for an ordinary object, such as a local variable, invokes undefined behavior when the destructor is called again, at the end of the scope. In generic contexts, the destructor call syntax can be used with an object of type other than class; this is known as a pseudo-destructor call: see member access operator.
How are possible destructors selected in a class?
A class can have one or more possible destructors, one of which is selected as the class destructor. To determine which prospective destructor is the destructor, at the end of the class definition, overload resolution is performed between prospective destructors declared in the class with an empty argument list.
Is the implicitly declared destructor for Class T virtual?
The implicitly declared destructor is virtual (because the base class has a virtual destructor) and the deallocation function lookup (delete() operator) results in an ambiguous, deleted, or inaccessible function call. The destructor for class T is trivial if all of the following are true:
When to call a throwable destructor in cppreference?
In most cases, this is noexcept (true). Therefore, a throwable destructor must be explicitly declared as noexcept(false) . The destructor is called every time an object’s lifespan ends, which includes the end of scope, for objects with automatic storage lifetimes, and for temporary objects whose lives were extended by binding to a reference.
How do you use destructuring assignment in JavaScript?
Object and array literal expressions provide an easy way to create ad hoc data packets. The destructuring assignment uses a similar syntax, but on the left side of the assignment to define which values to unpack from the source variable. Similarly, you can destruct arrays on the left hand side of the assignment