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#include "catch.hpp"
#include <mapbox/variant.hpp>
#include <mapbox/variant_io.hpp>
// https://github.com/mapbox/variant/issues/21
static int count;
struct t1
{
int value;
t1(t1 const& rhs)
: value(rhs.value)
{
++count;
}
t1(int v) : value(v)
{
++count;
}
~t1()
{
--count;
}
};
struct t2
{
int value;
t2(int v) : value(v)
{ // constructor fails
throw std::runtime_error("fail");
}
};
TEST_CASE("set() works cleanly even if the constructor throws ", "[variant]")
{
using variant_type = mapbox::util::variant<t1, t2>;
count = 0;
{
t1 obj{42};
variant_type v = obj;
REQUIRE(v.is<t1>());
REQUIRE(v.get<t1>().value == 42);
REQUIRE_THROWS(v.set<t2>(13));
}
REQUIRE(count == 0);
}
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