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Add more tests to variant_emplace_index.cpp

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This commit is contained in:
Peter Dimov
2021-01-13 02:32:05 +02:00
parent c6186e0a95
commit efc1d5acca
1 changed files with 111 additions and 0 deletions
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111
test/variant_emplace_index.cpp
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@ -57,6 +57,60 @@ STATIC_ASSERT( !std::is_nothrow_move_constructible<X2>::value );
STATIC_ASSERT( !std::is_nothrow_copy_assignable<X2>::value );
STATIC_ASSERT( !std::is_nothrow_move_assignable<X2>::value );
struct Y1
{
int v = 1;
Y1() = default;
Y1(Y1 const&) = delete;
Y1(Y1&&) = delete;
};
STATIC_ASSERT( !std::is_copy_constructible<Y1>::value );
STATIC_ASSERT( !std::is_move_constructible<Y1>::value );
struct Y2
{
int v = 2;
Y2() = default;
Y2(Y2 const&) = delete;
Y2(Y2&&) = delete;
};
STATIC_ASSERT( !std::is_copy_constructible<Y2>::value );
STATIC_ASSERT( !std::is_move_constructible<Y2>::value );
struct Z1
{
static int instances;
int v = 1;
Z1() { ++instances; }
~Z1() { --instances; }
Z1(Z1 const&) = delete;
Z1(Z1&&) = delete;
};
int Z1::instances = 0;
struct Z2
{
static int instances;
int v = 2;
Z2() { ++instances; }
~Z2() { --instances; }
Z2(Z2 const&) = delete;
Z2(Z2&&) = delete;
};
int Z2::instances = 0;
int main()
{
{
@ -177,5 +231,62 @@ int main()
BOOST_TEST_EQ( get<0>(v).v, 4 );
}
{
variant<Y1, Y2> v;
BOOST_TEST_EQ( v.index(), 0 );
BOOST_TEST_EQ( get<0>(v).v, 1 );
v.emplace<0>();
BOOST_TEST_EQ( v.index(), 0 );
BOOST_TEST_EQ( get<0>(v).v, 1 );
v.emplace<1>();
BOOST_TEST_EQ( v.index(), 1 );
BOOST_TEST_EQ( get<1>(v).v, 2 );
v.emplace<1>();
BOOST_TEST_EQ( v.index(), 1 );
BOOST_TEST_EQ( get<1>(v).v, 2 );
v.emplace<0>();
BOOST_TEST_EQ( v.index(), 0 );
BOOST_TEST_EQ( get<0>(v).v, 1 );
}
{
variant<Z1, Z2> v;
BOOST_TEST_EQ( v.index(), 0 );
BOOST_TEST_EQ( get<0>(v).v, 1 );
BOOST_TEST_EQ( Z1::instances, 1 );
BOOST_TEST_EQ( Z2::instances, 0 );
v.emplace<0>();
BOOST_TEST_EQ( v.index(), 0 );
BOOST_TEST_EQ( get<0>(v).v, 1 );
BOOST_TEST_EQ( Z1::instances, 1 );
BOOST_TEST_EQ( Z2::instances, 0 );
v.emplace<1>();
BOOST_TEST_EQ( v.index(), 1 );
BOOST_TEST_EQ( get<1>(v).v, 2 );
BOOST_TEST_EQ( Z1::instances, 0 );
BOOST_TEST_EQ( Z2::instances, 1 );
v.emplace<1>();
BOOST_TEST_EQ( v.index(), 1 );
BOOST_TEST_EQ( get<1>(v).v, 2 );
BOOST_TEST_EQ( Z1::instances, 0 );
BOOST_TEST_EQ( Z2::instances, 1 );
v.emplace<0>();
BOOST_TEST_EQ( v.index(), 0 );
BOOST_TEST_EQ( get<0>(v).v, 1 );
BOOST_TEST_EQ( Z1::instances, 1 );
BOOST_TEST_EQ( Z2::instances, 0 );
}
BOOST_TEST_EQ( Z1::instances, 0 );
BOOST_TEST_EQ( Z2::instances, 0 );
return boost::report_errors();
}