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std::make_shared and std::allocate_shared for arrays; Changes applied to the C++20 working draft in the fall meeting in November 2017 (Albuquerque) include: [86] [87] three-way comparison using the "spaceship operator", operator <=> initialization of an additional variable within a range-based for statement; lambdas in unevaluated contexts
Resource acquisition is initialization (RAII) [1] is a programming idiom [2] used in several object-oriented, statically typed programming languages to describe a particular language behavior. In RAII, holding a resource is a class invariant , and is tied to object lifetime .
The definition of aggregates was changed to explicitly exclude any class with member initializers; therefore, they are not allowed to use aggregate initialization. C++14 relaxes this restriction, [3] allowing aggregate initialization on such types. If the braced init list does not provide a value for that argument, the member initializer takes ...
The most vexing parse is a counterintuitive form of syntactic ambiguity resolution in the C++ programming language. In certain situations, the C++ grammar cannot distinguish between the creation of an object parameter and specification of a function's type.
The sizeof operator on such a struct gives the size of the structure as if the flexible array member were empty. This may include padding added to accommodate the flexible member; the compiler is also free to re-use such padding as part of the array itself.
Their memory use is typically worse than arrays, but is still linear. A two-dimensional array stored as a one-dimensional array of one-dimensional arrays (rows). An Iliffe vector is an alternative to a multidimensional array structure. It uses a one-dimensional array of references to arrays of one dimension less. For two dimensions, in ...
Dynamic initialization involves all object initialization done via a constructor or function call (unless the function is marked with constexpr, in C++11). The dynamic initialization order is defined as the order of declaration within the compilation unit (i.e. the same file).
In computer programming, lazy initialization is the tactic of delaying the creation of an object, the calculation of a value, or some other expensive process until the first time it is needed. It is a kind of lazy evaluation that refers specifically to the instantiation of objects or other resources.