A20-8-5-A20-8-6: Cannot create a smart pointer with nullptr value

[nbusser-sr]

Affected rules

• A20-8-5: cpp/autosar/make-unique-not-used-to-construct-object-owned-by-unique-ptr

Rule A20-8-5 (required, implementation, automated)
std::make_unique shall be used to construct objects owned by
std::unique_ptr.

• A20-8-6: cpp/autosar/make-shared-not-used-to-construct-object-owned-by-shared-ptr

Rule A20-8-6 (required, implementation, automated)
std::make_shared shall be used to construct objects owned by
std::shared_ptr.

Description

A20-8-5 triggers when initializing an unique_ptr to nullptr.
A20-8-6 triggers when initializing an shared_ptr to nullptr.

Initializing a smart pointer with a nullptr value can be however necessary in some specific cases.

Example

std::unique_ptr<bool> uniquePtr{nullptr}; // Triggers A20-8-5
std::shared_ptr<bool> sharedPtr{nullptr}; // Triggers A20-8-6