Class IntStruct

tests/test_thread.cpp:26–33

namespace {

struct IntStruct {
    explicit IntStruct(int v) : value(v) {};
    ~IntStruct() { value = -value; }
    IntStruct(const IntStruct &) = default;
    IntStruct &operator=(const IntStruct &) = default;

    int value;
};

struct EmptyStruct {};
EmptyStruct SharedInstance;