It is possible to define a struct (a) that has no user-defined constructors, and (b) for which a default constructor cannot be generated. For example, Foo in the below: struct Baz { Baz(int) {} }...

I wonder, why declaration of std_arr in the following code generates an error, while c_arr compiles well: struct S { int a, b; }; S c_arr[] = {{1, 2}, {3, 4}}; // OK std::array<S, 2> ...

Is it allowed in standard: struct A { int a = 3; int b = 3; }; A a{0,1}; // ??? Is this class still aggregate? clang accepts this code, but gcc doesn't.

struct S { int x; int y; }; std::atomic<S> asd{{1, 2}}; // what should this be? This doesn't work Edit: Both {{1, 2}} and ({1, 2}) work in g++, neither work in clang. Is there a workarou...

The section "Array Initialization" in Chapter 4, page 231 of "Thinking in Java, 2nd Edition" has this to say: Initializing arrays in C is error-prone and tedious. C++ uses aggregate initializ...

Suppose I have the following struct: struct sampleData { int x; int y; }; And when used, I want to initialize variables of sampleData type to a known state. sampleData sample = { 1, 2 } L...

Lets say we have the following code: #include <iostream> #include <string> struct A { A() {} A(const A&) { std::cout << "Copy" << std::endl; } A(A&&) { std:...