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#include <ring.h>
#include <cstdio>
#define LOG \
if (false) { \
} else \
puts(__PRETTY_FUNCTION__)
/// A helper sruct to count instances, copy- and move constructions.
struct m {
m() {
LOG;
++cnt;
}
~m() {
LOG;
--cnt;
}
m(const m&) {
LOG;
++cnt;
++cpy;
}
m(m&&) noexcept {
LOG;
++cnt;
++mov;
}
m& operator=(const m&) = delete;
m& operator=(m&&) = delete;
static std::size_t cnt;
static std::size_t mov;
static std::size_t cpy;
};
std::size_t m::cnt = 0;
std::size_t m::mov = 0;
std::size_t m::cpy = 0;
int main() {
{
ring<m, 8> r;
assert(r.size() == 0);
assert(r.is_empty());
assert(!r.is_full());
for (int i = 0; i < 10; ++i) {
bool ok = r.emplace();
i < 8 ? assert(ok) : assert(!ok);
}
assert(r.size() == 8);
assert(!r.is_empty());
assert(r.is_full());
#if __cplusplus >= 201703L
auto v = r.take();
assert(v.has_value());
assert(r.size() == 7);
assert(!r.is_empty());
assert(!r.is_full());
#endif
assert(m::cnt == 8);
}
assert(m::cnt == 0);
m::mov = 0;
m::cpy = 0;
{
ring<m, 8> r;
// Move construct m from an m rvalue reference.
assert(m::mov == 0);
r.push(m{});
assert(m::mov == 1);
// Copy construct m from an m lvalue reference.
m m;
assert(m::cpy == 0);
r.push(m);
assert(m::cpy == 1);
assert(m::cnt == 3);
}
assert(m::cnt == 0);
}
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