Key Keywords and Builtins ​

deprecated ​

Used to throw a warning when a function or method is called to specify that it is deprecated.

[[deprecated("Not thread-safe, use alternative x instead.")]]
char *receive(const std::string &topic);

[[deprecated("Not thread-safe, use alternative x instead.")]]
char *receive(const std::string &topic);

static ​

This keyword operates differently depending on whether it modifies a classes member data or member functions.

Data members When a data member is declared static, there is only one copy of the data, independent of the number of instances of the class. In other words, a static member is shared by all members of the class. A static data member may be useful to track the number of instances of the class.

Function members Static member functions are more intuitive. They belong to the class, but don't have access to the internal members of the class. That is, they cannot call non-static functions of the class, and don't have access to the this pointer. This concept is akin to a Python class method not having self as the first argument. A static function member may be useful to logically associate functionality with a class, but keep it otherwise isolated.

• https://www.tutorialspoint.com/cplusplus/cpp_static_members.htm

typedef & using ​

Short for type definition, this keyword allows the user to create new names for types. It is commonly used in C++ to redefine template types.

Usage

typedef existing_type new_type;

typedef existing_type new_type;

A more recent addition to create type aliases in C++ is the using keyword.

Usage

using new_type_name = existing_type;

using new_type_name = existing_type;

• https://stackoverflow.com/questions/4295432/typedef-function-pointer

noexcept ​

• c++11 - How to use noexcept in C++ or How does it work? - Stack Overflow
• https://www.modernescpp.com/index.php/c-core-guidelines-the-noexcept-specifier-and-operator
• c++ - When should I really use noexcept? - Stack Overflow
• noexcept (C++) | Microsoft Docs

Incomplete... to be filled.

nodiscard ​

• C++ Tutorial => [[nodiscard]]

incomplete...

explicit ​

• c++ - What does the explicit keyword mean? - Stack Overflow

Incomplete...

constexpr ​

Specifies a constant expression. Can be applied to variables or functions. Indicates that the value, or return value, is constant and is computed at compile time.

• https://learn.microsoft.com/en-us/cpp/cpp/constexpr-cpp?view=msvc-170

override ​

The override specifier is applied to a member function of a class and is used to ensure that the function is virtual and is overriding a virtual function from a base class. If this isn't true a sompile-time error is thrown.

decltype ​

• https://en.cppreference.com/w/cpp/language/decltype