C++

General Tips

• Difference between constexpr and const

  • const prevents variables from being modified, constexpr tells the compiler that an expression results in a compile-time constant

  • Only values known at compile time can be assigned to constexpr

  • When applied to functions, const can only be used for non-static member functions

    • Guarentees the member function does not modify any non-static data members

  • constexpr can be used with member and non-member functions

    • Declares function fit for use in constant expressions

    • Arguments and return types must be literal types

Links

• C++ Core Guidelines

• Programming: Principles and Practice Using C++ (2nd Edition) (book)

• Stackoverflow - Difference Between 'constexpr' and 'const'