In the following example if you change auto to void the program will print 1 instead of 0. Why is that happening. What lookup rules are applicable here?

In the following example if you change auto to void the program will print 1 instead of 0. Why is that happening. What lookup rules are applicable here?

In the following example if you change auto to void the program will print 1 instead of 0. Why is that happening. What lookup rules are applicable here?

In the following example if you change auto to void the program will print 1 instead of 0. Why is that happening. What lookup rules are applicable here?

Suppose I have a function returning by value

int x = 42; struct A { static int x; // 1 }; int A::x = x; // 2 Why at 2 the redeclaration of x inhabits a class scope? Where is a locus of some declaration – only at the first declaration (1) or every redeclaration has its own locus (1 and 2)? c++ […]

Cppreference has the following example of the usage of std::unreachable_sentinel:

Consider the following example that compiles with clang but is rejected by clang,gcc and msvc. Demo

I learnt that when have a user provided constructor in a class then the compiler will not implicitly generate a default constructor. Then I wrote the following code C d{}; in particular that I expected to fail(give error) because as per my understanding there is no default constructor for this class.

I’m trying to determine if two structs are compatible. In my case, it’s not clear to me if pointers of different types are considered compatible. In the following example, are structs t1 and t2 compatible?