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stuce-bot 2025-06-30 20:47:33 +02:00
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44
libraries/M5Utility/test/expected/observers.cpp Normal file
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#include <gtest/gtest.h>
#include <m5_utility/stl/expected.hpp>
struct move_detector {
move_detector() = default;
move_detector(move_detector &&rhs)
{
rhs.been_moved = true;
}
bool been_moved = false;
};
TEST(Expected, Observers)
{
m5::stl::expected<int, int> o1 = 42;
m5::stl::expected<int, int> o2{m5::stl::unexpect, 0};
const m5::stl::expected<int, int> o3 = 42;
EXPECT_TRUE(*o1 == 42);
EXPECT_TRUE(*o1 == o1.value());
EXPECT_TRUE(o2.value_or(42) == 42);
EXPECT_TRUE(o2.error() == 0);
EXPECT_TRUE(o3.value() == 42);
auto success = std::is_same<decltype(o1.value()), int &>::value;
EXPECT_TRUE(success);
success = std::is_same<decltype(o3.value()), const int &>::value;
EXPECT_TRUE(success);
success = std::is_same<decltype(std::move(o1).value()), int &&>::value;
EXPECT_TRUE(success);
#ifndef TL_EXPECTED_NO_CONSTRR
success = std::is_same<decltype(std::move(o3).value()), const int &&>::value;
EXPECT_TRUE(success);
#endif
m5::stl::expected<move_detector, int> o4{m5::stl::in_place};
move_detector o5 = std::move(o4).value();
EXPECT_TRUE(o4->been_moved);
EXPECT_TRUE(!o5.been_moved);
// Add by GOB
EXPECT_TRUE(o1.error_or(52) == 52);
EXPECT_TRUE(o2.error_or(52) == 0);
}