C++14 added variable templates, which define groups of related variables. In the standard library variable templates are used for accessing each type trait's value member: template<class T...

I'm aware this question has been asked many times, but this seems to be a slightly different variation which I can't figure out. Consider the following code: #include <cstdio> struct TestVal...

Suppose that I have a few inline constexpr variables (named as default_y and default_x) in a header file and I decided to move them to a class that they are completely related to and mark them stat...

I am a bit confused by the inline variable introduced by C++17. What are the differences between inline variable and inline static variable? Also will this be affected by scope? inline T var_no_sc...

Im seeing some examples of inline const variable getting initialized (and destructed) 3 times with visual studio 2017. Is this is a bug with the linker ? or is this supposed to happend in some othe...

C++20 introduces standard library header, <numbers>, with definitions in namespace std::numbers for math constants such as sqrt2 and sqrt3. It provide inverse values like inv_sqrt3, but not i...

My scenario is the following (it worked in clang but not in gcc) liba.hpp: inline int MY_GLOBAL = 0; libother.cpp: (dll) #include "myliba.hpp" void myFunc() { // MYGLOBAL = 28; } someexe....

C++ standards (earlier than C++17, at least) have said this about initialization order. Objects with static storage duration defined in namespace scope in the same translation unit and dynamica...

At the 2016 Oulu ISO C++ Standards meeting, a proposal called Inline Variables was voted into C++17 by the standards committee. In layman's terms, what are inline variables, how do they work and w...

struct sa { struct sb { int a = 123;}; inline static sb b; }; The above code generates an error: main.cpp:25:20: error: default member initializer for ‘sa::sb::a’ required before the end of it...

This is a follow up of this question. As mentioned in the comments to the answer: An inline variable has the property that - It has the same address in every translation unit. [...] Usually you ...

In C++17 we got inline variables and I have assumed that global constexpr variables are implicitly inline. But apparently this is true only for static member variables. What is the logic/technic...

I was playing around with auto template parameters and I was surprised that this code didn't compiled: constexpr auto bar = 2; template<auto& T> struct Foo { auto operator()() const { ...

Why does cppreference define type_traits xxx_v shortcuts as inline constexpr and not just constexpr? For example, see is_integral_v: template< class T > inline constexpr bool is_integral_v...

What should happen if an expression's type is not dependent, but we use it to initialize a static auto variable? GCC and Clang differ in their behavior template<typename T> struct A { stat...

In this link, what is an inline function and what is the inline keyword is explained. I'm reading through it because I realized I've never understood the meaning of these two concepts and how they ...

The inline keyword in C++ allows functions to be defined in headers so that the compiler can either actually inline them or leave only one copy of the function. This allows reducing the numbe...