Here, both constexpr and const are required: constexpr always refers to the expression being declared (here NP), while const refers to int (it declares a pointer-to-const). Removing the const would render …

The goal of constexpr depends on the context: For objects it indicates that the object is immutable and shall be constructed at compile-time. Aside from moving operations to compile-time rather than doing …

Apr 16, 2017 · What is the difference between if constexpr() and if()? Where and When can I use both of them?

Is there a difference between the following definitions? const double PI = 3.141592653589793; constexpr double PI = 3.141592653589793; If not, which style is preferred in C++11?

209 Introduction constexpr was not introduced as a way to tell the implementation that something can be evaluated in a context which requires a constant-expression; conforming implementations has been …

Jan 4, 2022 · Getting back to your question, std::string will work in constexpr for long strings just fine -- by allocating memory for it as you might expect. However, the C++20 constexpr rules are still limited …

Where should I prefer using macros and where should I prefer constexpr? Aren't they basically the same? #define MAX_HEIGHT 720 vs constexpr unsigned int max_height = 720;

With the new C++11 standard, when should I use the inline keyword over the constexpr keyword? Does the constexpr keyword offer any additional optimization over inline, or does it merely assert that

Sep 9, 2020 · constexpr auto res being a constexpr ensures that res is compile-time. It IS language solution. Forbidding user to call CallConstexptrFunction with non-constexpr argument in non-explicit …

Adding 'constexpr' support to C has no apparent downsides, it is just a preprocessor directive. However compiling C with C++, has a number of quirks that could break existing code. In addition, void* are …