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tagged_type_test.cpp
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tagged_type_test.cpp
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#include <cstdint>
#include <etl.hpp>
#include <gtest/gtest.h>
#include <utility>
using namespace etl;
/// @brief Tagged type identifiers for a width and height.
/// Should not be used directly.
namespace detail
{
class WidthTag
{
};
class HeightTag
{
};
class ValueTag
{
};
} // namespace detail
using Width = TaggedFundamental<detail::WidthTag, uint32_t>;
using Height = TaggedFundamental<detail::HeightTag, uint32_t>;
using Value = TaggedFundamental<detail::ValueTag, int32_t>;
class Rect
{
public:
Width width;
Height height;
Rect() noexcept = default;
Rect(Width width, Height height) noexcept : width(std::move(width)), height(std::move(height))
{
}
};
TEST(EtlTaggedType, TaggedTypeTest)
{
const Rect rect(Width(4), Height(2));
ASSERT_EQ(rect.width, 4);
ASSERT_EQ(rect.height, 2);
}
TEST(EtlTaggedType, ArithmeticOperators)
{
Width w1(10);
const Width w2(5);
ASSERT_EQ((w1 + w2).value, 15);
ASSERT_EQ((w1 - w2).value, 5);
ASSERT_EQ((w1 * w2).value, 50);
ASSERT_EQ((w1 / w2).value, 2);
w1 += w2;
ASSERT_EQ(w1.value, 15);
w1 -= w2;
ASSERT_EQ(w1.value, 10);
w1 *= w2;
ASSERT_EQ(w1.value, 50);
w1 /= w2;
ASSERT_EQ(w1.value, 10);
}
TEST(EtlTaggedType, BitwiseOperators)
{
Value v1(0b1010); // 10 in binary
const Value v2(0b0110); // 6 in binary
ASSERT_EQ((v1 & v2).value, 0b0010); // 2 in binary
ASSERT_EQ((v1 | v2).value, 0b1110); // 14 in binary
ASSERT_EQ((v1 ^ v2).value, 0b1100); // 12 in binary
ASSERT_EQ((~v1).value, ~0b1010);
v1 &= v2;
ASSERT_EQ(v1.value, 0b0010); // 2 in binary
v1 |= v2;
ASSERT_EQ(v1.value, 0b0110); // 6 in binary
v1 ^= v2;
ASSERT_EQ(v1.value, 0b0000); // 0 in binary
Value v3(0b0010); // 2 in binary
const Value v4(1);
ASSERT_EQ((v3 << v4).value, 0b0100); // 4 in binary
ASSERT_EQ((v3 >> v4).value, 0b0001); // 1 in binary
v3 <<= v4;
ASSERT_EQ(v3.value, 0b0100); // 4 in binary
v3 >>= v4;
ASSERT_EQ(v3.value, 0b0010); // 2 in binary
}
TEST(EtlTaggedType, ComparisonOperators)
{
const Width w1(10);
const Width w2(5);
ASSERT_TRUE(w1 > w2);
ASSERT_TRUE(w1 >= w2);
ASSERT_FALSE(w1 < w2);
ASSERT_FALSE(w1 <= w2);
ASSERT_FALSE(w1 == w2);
ASSERT_TRUE(w1 != w2);
const Width w3(10);
ASSERT_TRUE(w1 == w3);
ASSERT_FALSE(w1 != w3);
}
TEST(EtlTaggedType, ArithmeticWithFundamentalType)
{
Width w1(10);
const uint32_t val = 5;
ASSERT_EQ((w1 + val).value, 15);
ASSERT_EQ((w1 - val).value, 5);
ASSERT_EQ((w1 * val).value, 50);
ASSERT_EQ((w1 / val).value, 2);
w1 += val;
ASSERT_EQ(w1.value, 15);
w1 -= val;
ASSERT_EQ(w1.value, 10);
w1 *= val;
ASSERT_EQ(w1.value, 50);
w1 /= val;
ASSERT_EQ(w1.value, 10);
}
TEST(EtlTaggedType, BitwiseWithFundamentalType)
{
Value v1(0b1010); // 10 in binary
const int32_t val = 0b0110; // 6 in binary
ASSERT_EQ((v1 & val).value, 0b0010); // 2 in binary
ASSERT_EQ((v1 | val).value, 0b1110); // 14 in binary
ASSERT_EQ((v1 ^ val).value, 0b1100); // 12 in binary
v1 &= val;
ASSERT_EQ(v1.value, 0b0010); // 2 in binary
v1 |= val;
ASSERT_EQ(v1.value, 0b0110); // 6 in binary
v1 ^= val;
ASSERT_EQ(v1.value, 0b0000); // 0 in binary
Value v3(0b0010); // 2 in binary
const int32_t shift = 1;
ASSERT_EQ((v3 << shift).value, 0b0100); // 4 in binary
ASSERT_EQ((v3 >> shift).value, 0b0001); // 1 in binary
v3 <<= shift;
ASSERT_EQ(v3.value, 0b0100); // 4 in binary
v3 >>= shift;
ASSERT_EQ(v3.value, 0b0010); // 2 in binary
}