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// This file is part of CAF, the C++ Actor Framework. See the file LICENSE in
// the main distribution directory for license terms and copyright or visit
// https://github.com/actor-framework/actor-framework/blob/master/LICENSE.
#define CAF_SUITE variant
#include "caf/variant.hpp"
#include "core-test.hpp"
#include <string>
#include "caf/actor_system.hpp"
#include "caf/actor_system_config.hpp"
#include "caf/byte_buffer.hpp"
#include "caf/deep_to_string.hpp"
#include "caf/none.hpp"
using namespace std::string_literals;
using namespace caf;
// 20 integer wrappers for building a variant with 20 distinct types
#define i_n(n) \
class i##n { \
public: \
i##n(int y = 0) : x(y) { \
} \
i##n(i##n&& other) : x(other.x) { \
other.x = 0; \
} \
i##n& operator=(i##n&& other) { \
x = other.x; \
other.x = 0; \
return *this; \
} \
i##n(const i##n&) = default; \
i##n& operator=(const i##n&) = default; \
int x; \
}; \
bool operator==(int x, i##n y) { \
return x == y.x; \
} \
bool operator==(i##n x, int y) { \
return y == x; \
} \
bool operator==(i##n x, i##n y) { \
return x.x == y.x; \
} \
template <class Inspector> \
bool inspect(Inspector& f, i##n& x) { \
return f.object(x).fields(f.field("x", x.x)); \
}
#define macro_repeat20(macro) \
macro(01) macro(02) macro(03) macro(04) macro(05) macro(06) macro(07) \
macro(08) macro(09) macro(10) macro(11) macro(12) macro(13) macro(14) \
macro(15) macro(16) macro(17) macro(18) macro(19) macro(20)
macro_repeat20(i_n)
// a variant with 20 element types
using v20 = variant<i01, i02, i03, i04, i05, i06, i07, i08, i09, i10, i11,
i12, i13, i14, i15, i16, i17, i18, i19, i20>;
#define VARIANT_EQ(x, y) \
do { \
using type = std::decay_t<decltype(y)>; \
auto&& tmp = x; \
if (CHECK(holds_alternative<type>(tmp))) \
CHECK_EQ(get<type>(tmp), y); \
} while (false)
#define v20_test(n) \
x3 = i##n{0x##n}; \
VARIANT_EQ(v20{x3}, i##n{0x##n}); \
x4 = x3; \
VARIANT_EQ(x4, i##n{0x##n}); \
VARIANT_EQ(v20{std::move(x3)}, i##n{0x##n}); \
VARIANT_EQ(x3, i##n{0}); \
x3 = std::move(x4); \
VARIANT_EQ(x4, i##n{0}); \
VARIANT_EQ(x3, i##n{0x##n});
// copy construction, copy assign, move construction, move assign
// and finally serialization round-trip
CAF_TEST(copying_moving_roundtrips) {
actor_system_config cfg;
actor_system sys{cfg};
variant<int, none_t> x2;
VARIANT_EQ(x2, 0);
v20 x3;
VARIANT_EQ(x3, i01{0});
v20 x4;
macro_repeat20(v20_test);
}
namespace {
struct test_visitor {
template <class... Ts>
std::string operator()(const Ts&... xs) {
return deep_to_string_as_tuple(xs...);
}
};
} // namespace
CAF_TEST(constructors) {
variant<int, std::string> a{42};
variant<float, int, std::string> b{"bar"s};
variant<int, std::string, double> c{123};
variant<bool, uint8_t> d{uint8_t{252}};
VARIANT_EQ(a, 42);
VARIANT_EQ(b, "bar"s);
VARIANT_EQ(c, 123);
VARIANT_EQ(d, uint8_t{252});
}
CAF_TEST(n_ary_visit) {
variant<int, std::string> a{42};
variant<float, int, std::string> b{"bar"s};
variant<int, std::string, double> c{123};
test_visitor f;
CHECK_EQ(visit(f, a), R"__([42])__");
CHECK_EQ(visit(f, a, b), R"__([42, "bar"])__");
CHECK_EQ(visit(f, a, b, c), R"__([42, "bar", 123])__");
}
CAF_TEST(get_if) {
variant<int, std::string> b = "foo"s;
MESSAGE("test get_if directly");
CHECK_EQ(get_if<int>(&b), nullptr);
CHECK_NE(get_if<std::string>(&b), nullptr);
MESSAGE("test get_if via unit test framework");
VARIANT_EQ(b, "foo"s);
}
CAF_TEST(less_than) {
using variant_type = variant<char, int>;
auto a = variant_type{'x'};
auto b = variant_type{'y'};
CHECK(a < b);
CHECK(!(a > b));
CHECK(a <= b);
CHECK(!(a >= b));
b = 42;
CHECK(a < b);
CHECK(!(a > b));
CHECK(a <= b);
CHECK(!(a >= b));
a = 42;
CHECK(!(a < b));
CHECK(!(a > b));
CHECK(a <= b);
CHECK(a >= b);
b = 'x';
}
CAF_TEST(equality) {
variant<uint16_t, int> x = 42;
variant<uint16_t, int> y = uint16_t{42};
CHECK_NE(x, y);
}
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